/* ───────────────────────────────────────────────
   Design tokens
   Palette: deep lab-navy ground, three accents borrowed
   from the three merged tools - teal   = compound/explorer (reagent glow)
     violet = reaction drawing (electron path)
     amber  = ORCA / compute (energy release)
   ─────────────────────────────────────────────── */
:root {
  --ink:        #0B0F17;
  --ink-2:      #101623;
  --panel:      #161F30;
  --panel-2:    #1E293B;
  --surface-sunken: #0D131F;
  --border:     rgba(226, 232, 240, 0.12);
  --border-strong: rgba(226, 232, 240, 0.24);

  --teal:       #2DD4BF;
  --teal-dim:   #0F766E;
  --violet:     #818CF8;
  --violet-dim: #4F46E5;
  --amber:      #FBBF24;
  --amber-dim:  #D97706;
  --cyan:       #38BDF8;

  --text:       #F1F5F9;
  --text-muted: #94A3B8;
  --text-faint: #64748B;

  --danger:     #F87171;
  --danger-bg:  rgba(248, 113, 113, 0.12);
  --success-bg: rgba(45, 212, 191, 0.12);
  --info-bg:    rgba(129, 140, 248, 0.12);

  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;

  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.65;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, .brand-name, .btn, .nav-btn, .ws-tab, .choice-title {
  font-family: var(--font-display);
}

a { color: inherit; }

::selection { background: rgba(45, 212, 191, 0.25); color: #FFFFFF; }

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

.hidden { display: none !important; }

/* ambient background field */
.bg-orbit-field {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 15% 10%, rgba(45, 212, 191, 0.06), transparent 45%),
    radial-gradient(circle at 85% 20%, rgba(129, 140, 248, 0.06), transparent 50%),
    radial-gradient(circle at 50% 90%, rgba(251, 191, 36, 0.04), transparent 45%),
    var(--ink);
}

/* ───────────────────────────────────────────────
   Top bar + brand mark
   ─────────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.9rem 2rem;
  background: rgba(10, 20, 32, 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 0.75rem; cursor: pointer; background: none; border: none; }

.brand-atom { width: 40px; height: 40px; overflow: visible; flex-shrink: 0; }
.atom-core { fill: var(--teal); }
.atom-ring { fill: none; stroke-width: 1.4; }
.ring-a { stroke: var(--teal); opacity: 0.85; animation: spin-a 7s linear infinite; transform-origin: 50px 50px; }
.ring-b { stroke: var(--violet); opacity: 0.85; animation: spin-b 9s linear infinite; transform-origin: 50px 50px; }
.ring-c { stroke: var(--amber); opacity: 0.85; animation: spin-c 11s linear infinite reverse; transform-origin: 50px 50px; }
.atom-electron { fill: var(--text); }
.e-a { offset-path: path('M 8,50 A 42,16 0 1 1 92,50 A 42,16 0 1 1 8,50'); animation: orbit 3.2s linear infinite; fill: var(--teal); }
.e-b { offset-path: path('M 8,50 A 42,16 0 1 1 92,50 A 42,16 0 1 1 8,50'); animation: orbit 4.1s linear infinite reverse; fill: var(--violet); transform: rotate(60deg); }
.e-c { offset-path: path('M 8,50 A 42,16 0 1 1 92,50 A 42,16 0 1 1 8,50'); animation: orbit 5s linear infinite; fill: var(--amber); transform: rotate(120deg); }

@keyframes spin-a { to { transform: rotate(360deg); } }
@keyframes spin-b { to { transform: rotate(420deg); } }
@keyframes spin-c { to { transform: rotate(-360deg); } }
@keyframes orbit { to { offset-distance: 100%; } }

.brand-text { display: flex; flex-direction: column; line-height: 1.2; text-align: left; }
.brand-name { font-weight: 700; font-size: 1.2rem; letter-spacing: 0.01em; }
.brand-tag { font-size: 0.76rem; color: var(--text-muted); font-family: var(--font-body); }

.topbar-actions { display: flex; align-items: center; gap: 0.9rem; }

.user-chip { display: flex; align-items: center; gap: 0.5rem; background: var(--panel-2); border: 1px solid var(--border); border-radius: 999px; padding: 0.3rem 0.5rem 0.3rem 0.3rem; }
.user-chip img { width: 26px; height: 26px; border-radius: 50%; }
.user-chip span { font-size: 0.85rem; max-width: 140px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.link-btn { background: none; border: none; color: var(--text-muted); font-size: 0.8rem; cursor: pointer; text-decoration: underline; padding: 0; font-family: var(--font-body); }
.link-btn:hover { color: var(--text); }

/* ───────────────────────────────────────────────
   Views (home / draw / orca) & workspace tabs
   ─────────────────────────────────────────────── */
main { max-width: 1000px; margin: 0 auto; padding: 0 2rem 6rem; }

.view { display: none; animation: fade-up 0.35s ease; }
.view.is-active { display: block; }

@keyframes fade-up {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero { max-width: 720px; margin: 4.5rem auto 3rem; text-align: center; }
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  font-weight: 700;
  margin: 0 0 1rem;
  background: linear-gradient(90deg, var(--teal), var(--violet) 55%, var(--amber));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub { color: var(--text-muted); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.hero-mission { color: var(--text-faint); font-size: 0.85rem; max-width: 560px; margin: 1rem auto 0; }

.choice-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
  max-width: 820px;
  margin: 0 auto;
}
@media (max-width: 680px) { .choice-grid { grid-template-columns: 1fr; } }

.choice-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.6rem;
  text-align: left;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  padding: 2rem 1.8rem;
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease;
  color: var(--text);
}
.choice-card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.choice-icon { font-size: 2.2rem; }
.choice-title { font-size: 1.3rem; font-weight: 700; }
.choice-desc { color: var(--text-muted); font-size: 0.92rem; line-height: 1.55; }
.choice-cta { color: var(--teal); font-weight: 600; font-size: 0.9rem; margin-top: 0.4rem; }

.workspace-nav { display: flex; gap: 0.5rem; margin: 2.5rem 0 2rem; flex-wrap: wrap; }
.ws-tab {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.ws-tab:hover { color: var(--text); border-color: var(--border-strong); }
.ws-tab.is-active { background: var(--teal); color: var(--ink); border-color: var(--teal); }

.ws-panel { display: none; animation: fade-up 0.3s ease; }
.ws-panel.is-active { display: block; }

/* ───────────────────────────────────────────────
   Panels / forms
   ─────────────────────────────────────────────── */
.panel-head { margin-bottom: 1.8rem; }
.panel-eyebrow { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; color: var(--teal); text-transform: uppercase; }
.panel-head h2 { font-size: 1.7rem; font-weight: 700; margin: 0.3rem 0 0.6rem; }
.panel-head p { color: var(--text-muted); max-width: 660px; margin: 0; }
.panel-head code { font-family: var(--font-mono); background: var(--panel-2); padding: 0.1rem 0.4rem; border-radius: 4px; }

.tool-form {
  display: flex;
  gap: 0.75rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 0.9rem;
  flex-wrap: wrap;
}
.tool-form input[type="text"],
.tool-form input[type="password"],
.tool-form textarea {
  flex: 1;
  min-width: 220px;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
}
.tool-form textarea { font-family: var(--font-mono); }
.tool-form input:focus, .tool-form textarea:focus { border-color: var(--teal); }

.kaggle-form { flex-direction: column; }
.form-row { display: flex; flex-direction: column; gap: 0.35rem; width: 100%; }
.form-row label { font-size: 0.85rem; color: var(--text-muted); }
.form-row-full textarea { width: 100%; }
.checkbox-row { display: flex; align-items: center; gap: 0.5rem; flex-direction: row; font-size: 0.88rem; }
.checkbox-row input { width: auto; }
.radio-row { display: flex; flex-wrap: wrap; gap: 1.25rem; margin-top: 0.25rem; }
.radio-option { display: flex; align-items: center; gap: 0.4rem; flex-direction: row; font-size: 0.9rem; font-weight: 400; }
.radio-option input { width: auto; }
.field-hint { display: block; margin-top: 0.3rem; font-size: 0.78rem; opacity: 0.7; }
.field-optional { font-weight: 400; opacity: 0.65; }

/* ───────────────────────────────────────────────
   Buttons
   ─────────────────────────────────────────────── */
.btn {
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-s);
  border: 1px solid transparent;
  padding: 0.75rem 1.4rem;
  cursor: pointer;
  transition: transform 0.12s ease, filter 0.12s ease;
  white-space: nowrap;
}
.btn:hover { filter: brightness(1.08); }
.btn:active { transform: scale(0.98); }

.btn-primary { background: var(--teal); color: var(--ink); }
.btn-outline { background: transparent; color: var(--teal); border-color: var(--teal-dim); }
.btn-ghost { background: var(--panel-2); color: var(--text); border-color: var(--border); }
.btn-small { padding: 0.5rem 0.9rem; font-size: 0.85rem; }
.btn-large { padding: 1rem 1.8rem; font-size: 1.05rem; }

.orca-launch-row { display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap; margin-bottom: 1.5rem; }
.orca-coords-status { color: var(--text-muted); font-size: 0.9rem; }
.orca-coords-status.is-set { color: var(--teal); }

/* ───────────────────────────────────────────────
   Alerts / loading
   ─────────────────────────────────────────────── */
.alert { border-radius: var(--radius-s); padding: 0.9rem 1.1rem; margin-top: 1rem; font-size: 0.92rem; }
.alert-error { background: var(--danger-bg); color: #FFB3B3; border: 1px solid rgba(255,107,107,0.3); }
.alert-success { background: var(--success-bg); color: var(--teal); border: 1px solid rgba(43,217,168,0.3); }
.alert-info { background: var(--info-bg); color: #C9D1FF; border: 1px solid rgba(139,155,255,0.25); margin-top: 1rem; font-size: 0.88rem; }

.loading-row { display: flex; align-items: center; gap: 0.6rem; color: var(--text-muted); margin-top: 1rem; font-size: 0.9rem; }
.spinner {
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid var(--border-strong);
  border-top-color: var(--teal);
  animation: spin 0.7s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ───────────────────────────────────────────────
   Results
   ─────────────────────────────────────────────── */
.result-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 1.5rem; margin-top: 1.5rem; }
@media (max-width: 720px) { .result-grid { grid-template-columns: 1fr; } }

.result-visual { background: #fff; border-radius: var(--radius-m); padding: 1rem; display: flex; flex-direction: column; align-items: center; gap: 0.8rem; overflow-x: auto; overflow-y: hidden; max-width: 100%; padding-bottom: 0.4rem; }
.result-visual img { max-width: 100%; border-radius: var(--radius-s); display: block; height: auto; margin: 0 auto; }
.result-data { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-m); padding: 1.4rem; }
.result-data h3 { margin: 0 0 1rem; font-size: 1.3rem; }
.prop-list { display: grid; gap: 0.6rem; margin: 0 0 1.2rem; }
.prop-list > div { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; border-bottom: 1px dashed var(--border); padding-bottom: 0.4rem; }
.prop-list dt { color: var(--text-muted); font-size: 0.85rem; flex-shrink: 0; }
.prop-list dd { margin: 0; text-align: right; overflow-wrap: anywhere; word-break: break-word; }

.iupac-dd {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.45rem;
  max-width: 72%;
  word-break: break-word;
  overflow-wrap: anywhere;
  text-align: right;
}

.iupac-text {
  color: var(--text);
  font-size: 0.9rem;
  user-select: text;
  -webkit-user-select: text;
}

.iupac-unavailable {
  color: var(--text-faint);
  font-style: italic;
  font-size: 0.82rem;
}

.btn-copy-inline {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 0.15rem 0.35rem;
  line-height: 1;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.btn-copy-inline:hover {
  background: var(--panel-2);
  color: var(--teal);
  border-color: var(--teal-dim);
}
.result-data h4 { font-size: 0.9rem; color: var(--text-muted); margin: 1rem 0 0.4rem; text-transform: uppercase; letter-spacing: 0.05em; }
.result-data ul { margin: 0; padding-inline-start: 1.2rem; }
.result-data p { margin: 0; color: var(--text); font-size: 0.92rem; }

.mono { font-family: var(--font-mono); font-size: 0.85rem; word-break: break-all; }
.mono.small { font-size: 0.8rem; color: var(--text-muted); }

.reaction-result { margin-top: 1.5rem; }
.reaction-actions { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; justify-content: center; }

.code-block { background: var(--ink-2); border: 1px solid var(--border); border-radius: var(--radius-m); padding: 1.2rem; overflow-x: auto; font-size: 0.85rem; }
.orca-output-actions { display: flex; gap: 0.8rem; margin-top: 0.8rem; flex-wrap: wrap; }

/* ───────────────────────────────────────────────
   Jobs list
   ─────────────────────────────────────────────── */
.jobs-toolbar { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 1rem; }
.jobs-list { list-style: none; margin: 1rem 0 0; padding: 0; display: flex; flex-direction: column; gap: 0.8rem; }
.job-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1.1rem 1.3rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.job-info { display: flex; flex-direction: column; gap: 0.35rem; flex: 1 1 520px; min-width: 0; max-width: 100%; }
.job-name { font-weight: 700; display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.job-meta { font-size: 0.8rem; color: var(--text-faint); font-family: var(--font-mono); }
.job-status {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.job-status.status-queued, .job-status.status-running { background: var(--info-bg); color: #C9D1FF; }
.job-status.status-restarting { background: rgba(255,166,92,0.15); color: var(--amber); }
.job-status.status-complete { background: var(--success-bg); color: var(--teal); }
.job-status.status-error, .job-status.status-cancelled { background: var(--danger-bg); color: #FFB3B3; }
.job-status.status-unknown { background: var(--panel-2); color: var(--text-muted); }
.job-warning {
  font-size: 0.8rem;
  color: var(--amber);
  background: rgba(255, 166, 92, 0.08);
  border: 1px solid rgba(255, 166, 92, 0.35);
  border-radius: var(--radius-s);
  padding: 0.6rem 0.85rem;
  margin-top: 0.4rem;
  width: 100%;
  max-width: 100%;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-wrap: anywhere;
  line-height: 1.5;
  box-sizing: border-box;
  font-family: var(--font-mono, monospace);
}
.job-timer {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--ink-2);
  border: 1px solid var(--border);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}
.job-actions { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.job-download-link {
  color: var(--teal);
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  border: 1px solid var(--teal-dim);
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  background: none;
  cursor: pointer;
  font-family: inherit;
}
.job-download-link:disabled { opacity: 0.6; cursor: wait; }
.job-download-link:hover { background: var(--success-bg); }
.job-remove-btn { background: none; border: none; color: var(--text-faint); cursor: pointer; font-size: 0.85rem; }
.job-remove-btn:hover { color: var(--danger); }

/* ───────────────────────────────────────────────
   Toasts
   ─────────────────────────────────────────────── */
.toast-stack {
  position: fixed;
  bottom: 1.5rem;
  left: 1rem;
  right: 1rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.6rem;
  pointer-events: none;
}
.toast {
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-left: 4px solid var(--teal);
  border-radius: var(--radius-s);
  padding: 0.9rem 1.1rem;
  font-size: 0.88rem;
  box-shadow: 0 12px 30px rgba(0,0,0,0.35);
  animation: toast-in 0.25s ease;
  max-width: 340px;
  width: fit-content;
  pointer-events: auto;
}
.toast a { color: var(--teal); font-weight: 700; }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* ───────────────────────────────────────────────
   Modal ("options window") - the ORCA wizard
   ─────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(6, 11, 18, 0.72);
  backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  padding: 1.2rem;
}
.modal-window {
  width: min(560px, 100%);
  max-height: 88vh;
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-l);
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
  animation: modal-pop 0.22s ease;
}
@keyframes modal-pop {
  from { opacity: 0; transform: scale(0.96) translateY(6px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-header {
  display: flex; align-items: center; gap: 0.8rem;
  padding: 1.2rem 1.4rem;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0;
  background: var(--panel);
  border-radius: var(--radius-l) var(--radius-l) 0 0;
}
.modal-step-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink);
  background: var(--teal);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  white-space: nowrap;
}
.modal-header h3 { flex: 1; margin: 0; font-size: 1.05rem; }
.modal-close { background: transparent; border: none; color: var(--text-muted); font-size: 1.1rem; cursor: pointer; padding: 0.2rem 0.4rem; }
.modal-close:hover { color: var(--text); }
.modal-body { padding: 1.4rem; }

.option-grid { display: grid; grid-template-columns: repeat(var(--cols, 1), 1fr); gap: 0.6rem; }
.option-btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.92rem;
  border-radius: var(--radius-s);
  padding: 0.85rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
}
.option-btn:hover { border-color: var(--teal); color: var(--teal); }
.option-btn.is-selected { background: var(--teal); color: var(--ink); border-color: var(--teal); font-weight: 700; }

.modal-field { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1rem; }
.modal-field label { font-size: 0.85rem; color: var(--text-muted); }
.modal-field input, .modal-field textarea {
  background: var(--ink-2); border: 1px solid var(--border); border-radius: var(--radius-s);
  color: var(--text); padding: 0.7rem 0.9rem; font-family: var(--font-body); font-size: 0.95rem;
}
.modal-field textarea { font-family: var(--font-mono); min-height: 140px; }
.modal-hint { font-size: 0.8rem; color: var(--text-faint); margin: -0.3rem 0 0.6rem; }

.modal-tabs { display: flex; gap: 0.5rem; margin-bottom: 1rem; }
.modal-tab {
  flex: 1; background: var(--panel-2); border: 1px solid var(--border); color: var(--text-muted);
  padding: 0.6rem; border-radius: var(--radius-s); cursor: pointer; font-size: 0.85rem; font-family: var(--font-body);
}
.modal-tab.is-active { color: var(--teal); border-color: var(--teal-dim); }

.modal-actions { display: flex; justify-content: space-between; gap: 0.8rem; margin-top: 1.4rem; }
.modal-actions .btn { flex: 1; min-width: 0; white-space: normal; }

/* ───────────────────────────────────────────────
   Help disclosures (collapsible "how do I get X" panels)
   ─────────────────────────────────────────────── */
.help-disclosure {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  margin-top: 1rem;
  overflow: hidden;
}
.help-disclosure summary {
  cursor: pointer;
  padding: 0.95rem 1.15rem;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--teal);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  user-select: none;
}
.help-disclosure summary::-webkit-details-marker { display: none; }
.help-disclosure summary::after {
  content: "+";
  margin-inline-start: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-faint);
}
.help-disclosure[open] summary::after { content: "\2013"; }
.help-disclosure summary:hover { color: var(--text); }
.help-disclosure .help-body {
  padding: 0 1.15rem 1.1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}
.help-disclosure .help-body h4 {
  color: var(--text); font-size: 0.85rem; margin: 1.1rem 0 0.4rem;
  text-transform: uppercase; letter-spacing: 0.04em; font-family: var(--font-body); font-weight: 700;
}
.help-disclosure .help-body h4:first-child { margin-top: 0; }
.help-disclosure .help-body ol, .help-disclosure .help-body ul {
  margin: 0.3rem 0 0.8rem; padding-inline-start: 1.3rem; display: flex; flex-direction: column; gap: 0.35rem;
}
.help-disclosure .help-body p { margin: 0 0 0.7rem; }
.help-disclosure .help-body code { font-family: var(--font-mono); background: var(--panel-2); padding: 0.1rem 0.4rem; border-radius: 4px; color: var(--text); font-size: 0.83rem; }
.help-disclosure .help-body a { color: var(--teal); text-decoration: underline; }
.help-disclosure .help-note, .help-disclosure .help-warn {
  border-radius: var(--radius-s);
  padding: 0.7rem 0.9rem;
  font-size: 0.85rem;
  margin-top: 0.8rem;
}
.help-disclosure .help-note { background: var(--info-bg); border: 1px solid rgba(139,155,255,0.25); color: #C9D1FF; }
.help-disclosure .help-warn { background: var(--danger-bg); border: 1px solid rgba(255,107,107,0.3); color: #FFB3B3; }
.help-disclosure .help-note a, .help-disclosure .help-warn a { color: inherit; font-weight: 700; }

/* ───────────────────────────────────────────────
   Legal / Disclaimer page
   ─────────────────────────────────────────────── */
.legal-content { max-width: 760px; margin: 0 auto 3rem; }
.legal-updated { color: var(--text-faint); font-size: 0.82rem; margin: -0.6rem 0 1.8rem; }
.legal-toc {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-m);
  padding: 1.2rem 1.4rem; margin-bottom: 2.2rem;
}
.legal-toc h4 { margin: 0 0 0.7rem; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); }
.legal-toc ol { columns: 2; column-gap: 2rem; margin: 0; padding-inline-start: 1.2rem; font-size: 0.86rem; }
.legal-toc li { margin-bottom: 0.45rem; break-inside: avoid; }
.legal-toc a { color: var(--text-muted); text-decoration: none; }
.legal-toc a:hover { color: var(--teal); }
.legal-section { margin-bottom: 2.1rem; scroll-margin-top: 1.5rem; }
.legal-section h3 { font-size: 1.12rem; color: var(--teal); margin: 0 0 0.8rem; font-family: var(--font-display); }
.legal-section h4 { font-size: 0.92rem; color: var(--text); margin: 1rem 0 0.4rem; }
.legal-section p { color: var(--text-muted); margin: 0 0 0.8rem; font-size: 0.93rem; }
.legal-section ul, .legal-section ol { color: var(--text-muted); font-size: 0.93rem; padding-inline-start: 1.4rem; display: flex; flex-direction: column; gap: 0.4rem; margin: 0 0 0.8rem; }
.legal-section strong { color: var(--text); }
.legal-section a { color: var(--teal); text-decoration: underline; }
.legal-placeholder { color: var(--amber); font-style: italic; }
.legal-note-box {
  background: var(--info-bg); border: 1px solid rgba(139,155,255,0.25); border-radius: var(--radius-s);
  padding: 1rem 1.2rem; margin-bottom: 2rem; font-size: 0.88rem; color: #C9D1FF;
}
.legal-note-box strong { color: #C9D1FF; }

/* ───────────────────────────────────────────────
   Footer
   ─────────────────────────────────────────────── */
.site-footer {
  text-align: center;
  color: var(--text-faint);
  font-size: 0.82rem;
  padding: 2rem;
  border-top: 1px solid var(--border);
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.footer-links { display: flex; gap: 1.2rem; flex-wrap: wrap; justify-content: center; }
.footer-links .link-btn { font-size: 0.82rem; }

@media (max-width: 640px) {
  .topbar { padding: 0.8rem 1.1rem; }
  main { padding: 0 1.1rem 4rem; }
  .hero { padding: 0 1.1rem; margin-top: 3rem; }
  .tool-form > .btn { width: 100%; }
  .legal-toc ol { columns: 1; }
}

@media (max-width: 480px) {
  .brand-tag { display: none; }
  .modal-tabs { flex-direction: column; }
  .option-grid { grid-template-columns: 1fr !important; }
}

/* Every Kaggle notebook a continued job has run in. Shown only once a job has
   actually continued, so a single-window job stays visually unchanged. */
.job-chain {
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.job-chain a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.job-chain a:hover {
  color: var(--teal);
}

/* An inline "act on this text" control that reads as part of a hint rather
   than as a competing button. */
.link-button {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;
}

.link-button:hover {
  color: var(--text);
}

/* The equation as it was parsed, above the badges, so a mis-read coefficient
   is visible before the file is downloaded. */
.reaction-equation {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text);
  text-align: center;
}

.reaction-hint code {
  font-family: var(--font-mono);
  background: var(--info-bg);
  padding: 1px 5px;
  border-radius: 4px;
}

.reaction-badge {
  margin-top: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-s);
  font-size: 0.85rem;
  line-height: 1.45;
}

.badge-ok {
  background: var(--success-bg);
  color: var(--teal);
  border: 1px solid rgba(43, 217, 168, 0.25);
}

.badge-warn {
  background: rgba(255, 166, 92, 0.10);
  color: var(--amber);
  border: 1px solid rgba(255, 166, 92, 0.25);
}

.reaction-notes {
  margin: 8px 0 0;
  padding-left: 20px;
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.reaction-notes li { margin-bottom: 5px; }

/* The "how to write an equation" panel. Collapsed by default: it is reference
   material, and someone who already knows the syntax should not have to scroll
   past it every time. */
.reaction-help {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  background: var(--panel);
}

.reaction-help > summary {
  padding: 12px 16px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text);
  list-style: none;
}

.reaction-help > summary::-webkit-details-marker { display: none; }

.reaction-help > summary::before {
  content: "▸ ";
  color: var(--teal);
}

.reaction-help[open] > summary::before { content: "▾ "; }

.reaction-help > summary:hover { color: var(--teal); }

.reaction-help-body {
  padding: 4px 20px 20px;
  border-top: 1px solid var(--border);
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--text-muted);
}

.reaction-help-body h4 {
  margin: 18px 0 6px;
  font-size: 0.9rem;
  color: var(--text);
}

.reaction-help-body ul { margin: 6px 0; padding-left: 20px; }

.reaction-help-body li { margin-bottom: 4px; }

.reaction-help-body code,
.reaction-help-body pre {
  font-family: var(--font-mono);
  background: var(--info-bg);
  border-radius: 4px;
}

.reaction-help-body code { padding: 1px 5px; font-size: 0.85em; }

.reaction-example {
  margin: 8px 0;
  padding: 12px 14px;
  border-left: 3px solid var(--teal);
  color: var(--text);
  font-size: 0.85rem;
  white-space: pre;
  overflow-x: auto;
}

.reaction-help-note {
  padding: 10px 12px;
  border-radius: var(--radius-s);
  background: var(--info-bg);
  font-size: 0.82rem;
}

/* ───────────────────────────────────────────────
   Reaction Drawing Card & Semantic Grid
   ─────────────────────────────────────────────── */
.reaction-card-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  margin-bottom: 1rem;
}

.reaction-equation-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 320px) minmax(0, 1fr);
  align-items: center;
  gap: 1.25rem;
}

.reaction-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.reaction-field-label {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-height: 42px;
  justify-content: flex-end;
  cursor: pointer;
}

.reaction-label-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.reaction-label-hint {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.tool-form.reaction-card-form .reaction-text-input {
  width: 100%;
  height: 44px;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.92rem;
  padding: 0 1rem;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  box-sizing: border-box;
}

.tool-form.reaction-card-form .reaction-text-input:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.15);
  outline: none;
}

/* Center Stage: Conditions & Reaction Arrow */
.reaction-arrow-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  background: rgba(16, 22, 35, 0.5);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-s);
  padding: 0.75rem 0.9rem;
}

.reaction-condition-field {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.reaction-condition-label {
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-muted);
  text-align: center;
}

.reaction-condition-label .reaction-optional {
  color: var(--text-faint);
  font-weight: 400;
}

.tool-form.reaction-card-form input.reaction-condition-input {
  height: 34px !important;
  min-height: 34px !important;
  font-size: 0.84rem !important;
  padding: 0 0.75rem !important;
  text-align: center;
  flex: none;
}

.reaction-arrow-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  width: 100%;
  color: var(--violet);
  margin: 0.1rem 0;
}

.reaction-arrow-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}

.reaction-arrow-symbol {
  font-size: 1.4rem;
  line-height: 1;
  color: var(--violet);
  text-shadow: 0 0 12px rgba(129, 140, 248, 0.4);
}

/* Card Footer Bar */
.reaction-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.reaction-footer-options {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.reaction-option {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.86rem;
  color: var(--text-muted);
  cursor: pointer;
  margin: 0;
}

.reaction-option input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--teal);
  cursor: pointer;
}

.reaction-option sub {
  font-size: 0.75em;
  vertical-align: sub;
  line-height: 0;
}

.reaction-submit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  height: 44px;
  padding: 0 1.6rem;
  font-size: 0.95rem;
  font-weight: 600;
}

/* Quick hint */
.reaction-quick-hint {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  padding: 0.6rem 0.9rem;
  background: rgba(16, 22, 35, 0.4);
  border-radius: var(--radius-s);
  border: 1px solid var(--border);
  line-height: 1.5;
}

.reaction-quick-hint code {
  font-family: var(--font-mono);
  background: var(--panel-2);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  color: var(--teal);
}

/* Responsive Breakpoints */
@media (max-width: 960px) {
  .reaction-equation-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .reaction-arrow-center {
    max-width: 480px;
    width: 100%;
    margin: 0 auto;
  }
}

@media (max-width: 640px) {
  .reaction-card-footer {
    flex-direction: column;
    align-items: stretch;
  }
  .reaction-submit-btn {
    width: 100%;
  }
}

/* ───────────────────────────────────────────────
   Quantum Chemistry Engine & Analyzer
   ─────────────────────────────────────────────── */
.choice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}

.engine-input-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
}

.engine-source-tabs {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.sample-intro {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.engine-dropzone {
  position: relative;
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-s);
  background: rgba(14, 26, 43, 0.6);
  padding: 2rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.engine-dropzone:hover,
.engine-dropzone.drag-over {
  border-color: var(--teal);
  background: rgba(43, 217, 168, 0.05);
}

.engine-file-input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.dropzone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  pointer-events: none;
}

.dropzone-icon {
  font-size: 2rem;
}

.dropzone-text {
  color: var(--text);
  font-size: 0.95rem;
}

.dropzone-sub {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.paste-disclosure {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.6rem 1rem;
  background: var(--ink-2);
}

.paste-disclosure summary {
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.paste-body {
  margin-top: 0.75rem;
}

.paste-body textarea {
  width: 100%;
  background: var(--ink);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.75rem;
  font-size: 0.85rem;
  resize: vertical;
}

.engine-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1.25rem;
}

.file-chosen-label {
  font-size: 0.85rem;
  color: var(--teal);
  font-family: var(--font-mono);
}

/* Engine Results Grid */
.engine-result-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 2rem;
  animation: fadeIn 0.3s ease;
}

.engine-overview-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1.5rem;
}

.overview-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.engine-mol-name {
  margin: 0 0 0.5rem 0;
  font-size: 1.4rem;
  color: var(--text);
}

.badge-cluster {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.prop-badge {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-primary {
  background: rgba(43, 217, 168, 0.15);
  color: var(--teal);
  border: 1px solid rgba(43, 217, 168, 0.3);
}

.badge-neutral {
  background: rgba(145, 165, 190, 0.15);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.badge-success {
  background: rgba(43, 217, 168, 0.15);
  color: #34D399;
  border: 1px solid rgba(52, 211, 153, 0.3);
}

.badge-warning {
  background: rgba(255, 166, 92, 0.15);
  color: var(--amber);
  border: 1px solid rgba(255, 166, 92, 0.3);
}

.badge-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(255, 107, 107, 0.3);
}

.metric-tiles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}

.metric-tile {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.metric-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.metric-val {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  word-break: break-all;
}

/* 2-column layout */
.engine-dual-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem;
  width: 100%;
  max-width: 100%;
}

@media (max-width: 960px) {
  .engine-dual-grid {
    grid-template-columns: 1fr;
  }
}

.engine-col-card,
.engine-full-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-width: 0;
  max-width: 100%;
  overflow-x: hidden;
}

.card-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  width: 100%;
  max-width: 100%;
}

.card-title-row h4, .card-title-row h5 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--text);
}

/* 3D Viewport */
.viewport-3d {
  width: 100%;
  height: 440px;
  min-height: 380px;
  background: #060B12;
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  position: relative;
  overflow: hidden;
}

.viewer-controls {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  max-width: 100%;
}


.select-small {
  background: var(--ink-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.25rem 0.5rem;
  font-size: 0.8rem;
}

.viewer-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

/* Orbital Levels */
.orbital-diagram-wrap {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 1.25rem;
}

.orbital-levels {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.orbital-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-s);
  font-weight: 600;
}

.lumo-row {
  background: rgba(139, 155, 255, 0.12);
  border: 1px solid rgba(139, 155, 255, 0.3);
  color: var(--violet);
}

.homo-row {
  background: rgba(43, 217, 168, 0.12);
  border: 1px solid rgba(43, 217, 168, 0.3);
  color: var(--teal);
}

.gap-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.gap-line {
  flex: 1;
  height: 1px;
  background: var(--border);
}

.gap-badge {
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 166, 92, 0.15);
  color: var(--amber);
  border: 1px solid rgba(255, 166, 92, 0.3);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

/* CDFT Grid */
.cdft-heading {
  margin-top: 0.5rem;
}

.cdft-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.75rem;
}

.cdft-item {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.cdft-label {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.cdft-val {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
}

.cdft-desc {
  font-size: 0.68rem;
  color: var(--text-faint);
  font-family: var(--font-mono);
}

/* UV-Vis Plot */
.uvvis-canvas-wrap {
  background: #060B12;
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 1rem;
  position: relative;
  overflow: hidden;
}

.uvvis-canvas-wrap canvas {
  width: 100%;
  height: 320px;
  display: block;
}

.uvvis-controls-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 1rem 1.25rem;
}

}

@media (max-width: 640px) {
  .uvvis-controls-grid {
    grid-template-columns: 1fr;
  }
}

/* Multi-Spectrum Analysis Studio & Controls */
.spectrum-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(10, 18, 30, 0.95);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-bright);
  border-radius: var(--radius-s);
  padding: 0.5rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  z-index: 10;
  white-space: nowrap;
}

.spectrum-layers-tray {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.85rem 1rem;
  margin-top: 1rem;
}

.layers-tray-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.layers-title {
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text);
}

.layers-quick-toggles {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.toggle-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  background: var(--ink);
  border: 1px solid var(--border);
  border-radius: 9999px;
  padding: 0.2rem 0.6rem;
  cursor: pointer;
  color: var(--text-muted);
  user-select: none;
  transition: all 0.15s ease;
}

.toggle-pill:hover {
  color: var(--text);
  border-color: var(--border-bright);
}

.layers-cards-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.75rem;
}

.spectrum-layer-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 0.6rem 0.8rem;
  gap: 0.6rem;
  transition: border-color 0.2s ease;
}

.spectrum-layer-card:hover {
  border-color: var(--border-bright);
}

.spectrum-layer-card.is-exp {
  border-left: 3px solid var(--accent);
}

.spectrum-layer-card.is-theo {
  border-left: 3px solid var(--primary);
}

.layer-info-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  overflow: hidden;
}

.layer-color-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.layer-color-picker {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
  background: none;
  vertical-align: middle;
  flex-shrink: 0;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  outline: none;
}

.layer-color-picker::-webkit-color-swatch-wrapper {
  padding: 0;
  border-radius: 50%;
}

.layer-color-picker::-webkit-color-swatch {
  border: none;
  border-radius: 50%;
}

.layer-color-picker::-moz-color-swatch {
  border: none;
  border-radius: 50%;
}

.layer-color-picker:hover {
  transform: scale(1.2);
  border-color: var(--primary, #3b82f6);
  box-shadow: 0 0 6px rgba(59, 130, 246, 0.5);
}


.layer-name-wrap {
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.layer-name-title {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.layer-meta-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.layer-badge {
  font-size: 0.65rem;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  text-transform: uppercase;
  font-weight: 700;
}

.layer-badge.badge-exp {
  background: rgba(43, 217, 168, 0.15);
  color: var(--accent);
  border: 1px solid rgba(43, 217, 168, 0.3);
}

.layer-badge.badge-theo {
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.layer-del-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.2rem;
  font-size: 0.85rem;
  transition: color 0.15s;
}

.layer-del-btn:hover {
  color: #ef4444;
}

.spectrum-controls-container {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

@media (max-width: 900px) {
  .spectrum-controls-container {
    grid-template-columns: 1fr;
  }
}

.spectrum-control-box {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 1rem;
}

.control-box-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.4rem;
}

.control-box-header h5 {
  font-size: 0.88rem;
  margin: 0;
  color: var(--text);
}

.box-hint {
  font-size: 0.73rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.badge-scope {
  font-size: 0.65rem;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary);
  margin-left: auto;
  font-weight: 600;
}

.badge-scope.badge-ref {
  background: rgba(43, 217, 168, 0.15);
  color: var(--accent);
}

.slider-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.35rem;
}

.slider-label-row strong {
  color: var(--teal);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

.control-fields-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.exp-config-row, .display-options-row {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.tables-split-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .tables-split-wrap {
    grid-template-columns: 1fr;
  }
}

.slider-control label {
  display: block;
  font-size: 0.85rem;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.slider-control strong {
  color: var(--teal);
}

.slider-control input[type="range"] {
  width: 100%;
  accent-color: var(--teal);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.data-table th, .data-table td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.data-table th {
  color: var(--text-muted);
  font-weight: 600;
  background: var(--ink-2);
}

.freq-table-wrap, .transitions-table-wrap {
  max-height: 240px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
}

/* Reaction Thermochemistry Panel */
.thermo-params-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.thermo-species-inputs {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.thermo-species-inputs h4 {
  margin: 0 0 1rem 0;
  font-size: 0.95rem;
  color: var(--text);
}

.thermo-species-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.thermo-species-row {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  align-items: center;
  gap: 0.75rem;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.6rem 0.9rem;
}

.thermo-species-row .sp-badge {
  font-weight: 700;
  color: var(--teal);
  font-family: var(--font-mono);
}

.thermo-result-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1.5rem;
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.thermo-metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.thermo-tile {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.thermo-tile.highlight-tile {
  border-color: rgba(43, 217, 168, 0.4);
  background: rgba(43, 217, 168, 0.05);
}

.thermo-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.thermo-val {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.thermo-sub {
  font-size: 0.8rem;
  color: var(--teal);
  font-family: var(--font-mono);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}


/* ───────────────────────────────────────────────
   Header Navigation Switcher & 4-Grid Cards
   ─────────────────────────────────────────────── */
.topbar-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-s);
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-link-btn:hover {
  background: var(--panel-2);
  color: var(--text);
}

.nav-link-btn.is-active {
  background: var(--panel);
  border-color: var(--border);
  color: var(--teal);
}

.nav-link-btn.highlight-nav {
  color: var(--teal);
  border-color: rgba(43, 217, 168, 0.25);
  background: rgba(43, 217, 168, 0.06);
}

.nav-link-btn.highlight-nav:hover, .nav-link-btn.highlight-nav.is-active {
  background: rgba(43, 217, 168, 0.14);
  border-color: var(--teal);
  color: #fff;
}

.choice-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

@media (max-width: 960px) {
  .choice-grid-3 {
    grid-template-columns: 1fr;
    max-width: 520px;
  }
}

.choice-grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  max-width: 1200px;
  margin: 0 auto;
}

.choice-card-highlight {
  border-color: rgba(43, 217, 168, 0.4);
  background: linear-gradient(180deg, rgba(43, 217, 168, 0.08) 0%, var(--panel) 100%);
}

.choice-card-highlight:hover {
  border-color: var(--teal);
  box-shadow: 0 12px 30px rgba(43, 217, 168, 0.15);
}

/* ───────────────────────────────────────────────
   Reaction & Molecule Canvas Stage & Viewport
   ─────────────────────────────────────────────── */
.drawing-toolbar, .reaction-viewport-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  width: 100%;
  flex-wrap: wrap;
  padding: 0.5rem 0.75rem;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
}

.viewport-btn-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.toolbar-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.btn-canvas-theme, .btn-rxn-theme {
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-s);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-canvas-theme:hover, .btn-rxn-theme:hover {
  color: var(--text);
  border-color: var(--teal);
}

.btn-canvas-theme.active, .btn-rxn-theme.active {
  background: var(--teal);
  border-color: var(--teal);
  color: #0b0f19;
}

.molecule-img-stage {
  width: 100%;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  border-radius: var(--radius-s);
  padding: 1.5rem;
  transition: background 0.2s ease;
}

.molecule-img-stage img {
  max-width: 100%;
  max-height: 380px;
  object-fit: contain;
}

.drawing-actions {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  justify-content: center;
}

.reaction-canvas-container {
  width: 100%;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  overflow: hidden;
  position: relative;
  transition: background 0.2s ease;
}

.reaction-scroll-stage {
  width: 100%;
  min-height: 200px;
  max-height: 520px;
  overflow-x: auto;
  overflow-y: auto;
  padding: 1.5rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  -webkit-overflow-scrolling: touch;
}

.reaction-scheme-img {
  max-width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
  margin: auto;
  transition: width 0.2s ease, max-width 0.2s ease;
}

.reaction-scheme-img.scale-100 {
  max-width: none !important;
  width: auto !important;
}

/* ───────────────────────────────────────────────
   Quantum Engine Quick Job Selector & 3D Orbitals
   ─────────────────────────────────────────────── */
.engine-job-select-bar {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.9rem 1.1rem;
  margin-bottom: 1.25rem;
}

.job-picker-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.picker-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--teal);
}

.select-job-picker {
  flex: 1;
  min-width: 260px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.85rem;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-s);
}

.sample-picker-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.sample-picker-group .sample-intro {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.orbital-3d-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  flex-wrap: wrap;
  padding: 0.5rem 0.8rem;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  margin-bottom: 0.75rem;
}

.orbital-toolbar-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--teal);
}

.orbital-btn-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.orbital-btn.is-active {
  background: var(--teal) !important;
  color: #0b0f19 !important;
  font-weight: 700;
}

.orbital-row {
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

.orbital-row:hover {
  transform: translateX(4px);
  filter: brightness(1.15);
}

/* Light Theme UV-Vis Canvas Wrapper */
.uvvis-canvas-wrap.light-theme {
  background: #ffffff !important;
  border-color: #cbd5e1 !important;
}

@media (max-width: 768px) {
  .topbar {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  .choice-grid-4 {
    grid-template-columns: 1fr;
  }
}


/* ─── Archive calculation switcher bar ─── */
.engine-archive-bar {
  background: linear-gradient(135deg, rgba(67, 56, 202, 0.18), rgba(43, 217, 168, 0.12));
  border: 1px solid rgba(139, 155, 255, 0.35);
  border-radius: var(--radius-m);
  padding: 0.9rem 1.25rem;
  margin-bottom: 1.25rem;
  animation: fadeIn 0.25s ease-out;
}

.archive-bar-content {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

.archive-icon {
  font-size: 1.35rem;
}

.archive-title {
  font-weight: 600;
  color: var(--text);
  font-size: 0.92rem;
}

.archive-select {
  flex: 1;
  min-width: 200px;
  max-width: 400px;
}

.archive-cleanup-badge {
  font-size: 0.78rem;
  color: var(--teal);
  background: rgba(43, 217, 168, 0.12);
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  font-family: var(--font-mono);
  margin-left: auto;
}

.viewer-footer-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
  flex-wrap: wrap;
}

/* ─── Geometry Optimization Callout Banner ─── */
.engine-opt-banner {
  background: linear-gradient(135deg, rgba(43, 217, 168, 0.16), rgba(13, 148, 136, 0.22));
  border: 1px solid rgba(43, 217, 168, 0.45);
  border-radius: var(--radius-m);
  padding: 0.95rem 1.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  animation: fadeIn 0.3s ease-out;
}

.engine-opt-banner.hidden {
  display: none !important;
}

.opt-banner-content {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex: 1;
}

.opt-banner-icon {
  font-size: 1.5rem;
  filter: drop-shadow(0 2px 6px rgba(43, 217, 168, 0.4));
}

.opt-banner-text {
  font-size: 0.88rem;
  line-height: 1.45;
  color: var(--text);
}

.opt-banner-text strong {
  color: var(--teal);
  font-weight: 600;
  display: inline;
  margin-right: 0.35rem;
}

@media (max-width: 768px) {
  .engine-opt-banner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.85rem;
  }
}

/* ───────────────────────────────────────────────
   Two-Box Reaction Thermochemistry & Energetics
   ─────────────────────────────────────────────── */
.thermo-eq-preview-banner {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.eq-preview-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.thermo-live-eq {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--teal);
  background: rgba(43, 217, 168, 0.08);
  border: 1px solid rgba(43, 217, 168, 0.25);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-s);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.thermo-archive-dropzone-box {
  background: linear-gradient(135deg, rgba(67, 56, 202, 0.12), rgba(43, 217, 168, 0.08));
  border: 1px dashed rgba(139, 155, 255, 0.4);
  border-radius: var(--radius-m);
  padding: 0.9rem 1.25rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  transition: all 0.2s ease;
}

.thermo-archive-dropzone-box:hover {
  border-color: var(--teal);
  background: linear-gradient(135deg, rgba(67, 56, 202, 0.18), rgba(43, 217, 168, 0.15));
}

.archive-drop-icon {
  font-size: 1.6rem;
}

.archive-drop-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  flex: 1;
  min-width: 240px;
}

.archive-drop-info strong {
  color: var(--text);
  font-size: 0.92rem;
}

.archive-drop-info span {
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* Two-column Box Layout */
.thermo-two-column-boxes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 900px) {
  .thermo-two-column-boxes {
    grid-template-columns: 1fr;
  }
}

.thermo-species-box {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.thermo-reactants-box {
  border-top: 3px solid #3b82f6;
}

.thermo-products-box {
  border-top: 3px solid var(--teal);
}

.species-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.box-header-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.box-header-title h4 {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
}

.box-badge-icon {
  font-size: 1.25rem;
}

.species-box-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
}

.species-cards-list {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  min-height: 80px;
}

.species-card-item {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  position: relative;
  transition: all 0.2s ease;
}

.species-card-item:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.species-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.species-coeff-input {
  width: 55px !important;
  text-align: center;
  font-family: var(--font-mono);
  font-weight: 700;
  padding: 0.35rem 0.4rem !important;
}

.species-name-input {
  flex: 1;
  min-width: 110px;
  font-weight: 600;
  padding: 0.35rem 0.6rem !important;
}

.species-status-badge {
  font-size: 0.76rem;
  padding: 0.2rem 0.5rem;
  border-radius: 9999px;
  font-weight: 600;
}

.species-delete-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: 4px;
  font-size: 0.95rem;
  transition: all 0.15s ease;
}

.species-delete-btn:hover {
  color: #ef4444;
  background: rgba(239, 68, 68, 0.12);
}

.species-card-source {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.6rem 0.75rem;
}

.species-source-tabs {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.btn-source-tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-source-tab:hover {
  color: var(--text);
  background: var(--panel-2);
}

.btn-source-tab.active {
  background: var(--panel);
  border-color: var(--border);
  color: var(--teal);
}

.species-dual-slots-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

@media (max-width: 900px) {
  .species-dual-slots-container {
    grid-template-columns: 1fr;
  }
}

.species-slot-box {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.6rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: border-color 0.2s ease;
}

.species-slot-box:hover {
  border-color: var(--border-bright);
}

.species-slot-box.has-file {
  border-color: rgba(43, 217, 168, 0.4);
}

.species-slot-box.sp-slot.has-file {
  border-color: rgba(139, 155, 255, 0.4);
}

.slot-header-bar {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.slot-badge-req {
  background: rgba(43, 217, 168, 0.15);
  color: var(--teal);
  border: 1px solid rgba(43, 217, 168, 0.3);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.slot-badge-opt {
  background: rgba(139, 155, 255, 0.15);
  color: var(--violet);
  border: 1px solid rgba(139, 155, 255, 0.3);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.slot-title {
  font-size: 0.8rem;
  color: var(--text);
}

.slot-desc-pill {
  font-size: 0.68rem;
  color: var(--text-muted);
}

.species-file-drop {
  border: 1px dashed var(--border);
  border-radius: 4px;
  padding: 0.45rem 0.7rem;
  text-align: center;
  width: 100%;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
  background: var(--ink);
  transition: all 0.15s ease;
}

.species-file-drop:hover {
  border-color: var(--teal);
  color: var(--text);
}

.species-file-drop.has-file {
  border-color: var(--teal);
  background: rgba(43, 217, 168, 0.08);
  color: var(--teal);
  font-weight: 500;
}

.species-file-drop.sp-drop.has-file {
  border-color: var(--violet);
  background: rgba(139, 155, 255, 0.08);
  color: var(--violet);
  font-weight: 500;
}

/* Custom Gas Phase Conditions Disclosure */
.thermo-custom-conditions-disclosure {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.75rem 1rem;
  margin-top: 1rem;
  transition: all 0.2s ease;
}

.thermo-custom-conditions-disclosure[open] {
  border-color: var(--teal);
}

.thermo-custom-conditions-disclosure summary {
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

.thermo-custom-conditions-panel {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.custom-conditions-toggle-row {
  margin-bottom: 0.75rem;
}

.thermo-actions-bar {
  display: flex;
  justify-content: flex-end;
  margin-top: 1.25rem;
}

.thermo-species-breakdown-card {
  margin-top: 1.5rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1.25rem;
}

.thermo-species-breakdown-card h4 {
  margin: 0 0 1rem 0;
  font-size: 0.98rem;
  color: var(--text);
}

/* ───────────────────────────────────────────────
   Client-Side Archive & File Processing Pipeline
   ─────────────────────────────────────────────── */
.pipeline-panel {
  background: var(--panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-m);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.pipeline-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.pipeline-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.pipeline-metrics-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.pipeline-metric-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  transition: border-color 0.2s;
}

.pipeline-metric-card:hover {
  border-color: var(--teal);
}

.pipeline-metric-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.pipeline-metric-value {
  font-size: 1.35rem;
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--text);
}

.pipeline-metric-card.tier-analyze .pipeline-metric-value { color: var(--teal); }
.pipeline-metric-card.tier-keep .pipeline-metric-value { color: var(--violet); }
.pipeline-metric-card.tier-unknown .pipeline-metric-value { color: var(--amber); }
.pipeline-metric-card.tier-duplicate .pipeline-metric-value { color: var(--text-faint); }
.pipeline-metric-card.tier-ignore .pipeline-metric-value { color: var(--text-faint); }

.pipeline-progress-container {
  margin-bottom: 1rem;
}

.pipeline-progress-bar-bg {
  height: 6px;
  background: var(--panel-2);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.pipeline-progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--violet));
  width: 0%;
  transition: width 0.15s ease-out;
}

.pipeline-progress-text {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.pipeline-table-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pipeline-filter-buttons {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.pipeline-filter-btn {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all 0.15s;
}

.pipeline-filter-btn:hover {
  border-color: var(--teal);
  color: var(--text);
}

.pipeline-filter-btn.active {
  background: var(--teal);
  color: var(--ink);
  font-weight: 600;
  border-color: var(--teal);
}

.pipeline-table-wrapper {
  max-height: 380px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  background: var(--ink-2);
}

.pipeline-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  text-align: left;
}

.pipeline-table th {
  position: sticky;
  top: 0;
  background: var(--panel-2);
  color: var(--text-muted);
  font-weight: 600;
  padding: 0.6rem 0.85rem;
  border-bottom: 1px solid var(--border);
  z-index: 1;
}

.pipeline-table td {
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid rgba(210, 227, 245, 0.05);
  vertical-align: middle;
}

.pipeline-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.tier-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: help;
}

.tier-badge.badge-analyze { background: rgba(43, 217, 168, 0.15); color: var(--teal); border: 1px solid rgba(43, 217, 168, 0.3); }
.tier-badge.badge-keep { background: rgba(139, 155, 255, 0.15); color: var(--violet); border: 1px solid rgba(139, 155, 255, 0.3); }
.tier-badge.badge-unknown { background: rgba(255, 166, 92, 0.15); color: var(--amber); border: 1px solid rgba(255, 166, 92, 0.3); }
.tier-badge.badge-duplicate { background: rgba(255, 255, 255, 0.06); color: var(--text-muted); border: 1px solid var(--border); }
.tier-badge.badge-ignore { background: rgba(255, 255, 255, 0.04); color: var(--text-faint); border: 1px solid rgba(255, 255, 255, 0.05); }
.tier-badge.badge-unsupported { background: rgba(255, 107, 107, 0.12); color: var(--danger); border: 1px solid rgba(255, 107, 107, 0.25); }

.hash-preview {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
}

/* ───────────────────────────────────────────────
   3D Molecular Builder & Multi-Molecule Assembler
   ─────────────────────────────────────────────── */
.modal-window.is-builder-mode {
  width: min(1180px, 96vw);
  max-height: 94vh;
}

.builder3d-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.builder3d-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  background: var(--panel-2);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-m);
  border: 1px solid var(--border);
}

.builder3d-toolgroup {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.builder3d-toolbtn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: var(--radius-s);
  border: 1px solid var(--border);
  background: var(--ink-2);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s ease;
}

.builder3d-toolbtn:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.builder3d-toolbtn.is-active {
  background: var(--teal);
  color: var(--ink);
  border-color: var(--teal);
  font-weight: 700;
}

.builder3d-add-mol-box {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
  min-width: 240px;
  max-width: 440px;
}

.builder3d-add-mol-input {
  flex: 1;
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  color: var(--text);
}

.builder3d-main-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1rem;
  min-height: 480px;
}

@media (max-width: 900px) {
  .builder3d-main-layout {
    grid-template-columns: 1fr;
  }
}

.builder3d-viewport-wrap {
  position: relative;
  width: 100%;
  height: 500px;
  background: #090e17;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.builder3d-canvas-el {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.builder3d-viewport-overlay {
  position: absolute;
  top: 0.8rem;
  left: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  z-index: 5;
  pointer-events: none;
}

.builder3d-hint-badge {
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(4px);
  border: 1px solid var(--border);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-s);
  font-size: 0.8rem;
  color: var(--teal);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.builder3d-sidebar {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 1rem;
  overflow-y: auto;
  max-height: 500px;
}

.builder3d-card-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.builder3d-fragment-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem 0.65rem;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  font-size: 0.82rem;
  margin-bottom: 0.35rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.builder3d-fragment-item:hover {
  border-color: var(--teal-dim);
}

.builder3d-fragment-item.is-selected {
  border-color: var(--teal);
  background: rgba(45, 212, 191, 0.12);
  color: var(--teal);
  font-weight: 600;
}

.builder3d-nudge-row {
  display: grid;
  grid-template-columns: 24px 1fr 1fr;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  margin-bottom: 0.35rem;
}

.builder3d-nudge-btn {
  padding: 0.3rem 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  color: var(--text);
  cursor: pointer;
  text-align: center;
  transition: all 0.15s ease;
}

.builder3d-nudge-btn:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.builder3d-summary-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.6rem 0.9rem;
  font-size: 0.85rem;
}

/* ─── Calculation Outputs Selection Pane (Step 1) ─── */
.wizard-outputs-pane {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.output-source-card {
  background: linear-gradient(135deg, rgba(43, 217, 168, 0.12), rgba(13, 148, 136, 0.18));
  border: 1px solid rgba(43, 217, 168, 0.35);
  border-radius: var(--radius-s);
  padding: 0.75rem 0.9rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.output-source-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text);
}

.source-badge {
  background: var(--teal);
  color: var(--ink);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  text-transform: uppercase;
}

.output-source-meta {
  display: flex;
  gap: 0.9rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.outputs-sources-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}

@media (max-width: 600px) {
  .outputs-sources-grid {
    grid-template-columns: 1fr;
  }
}

.output-sample-item {
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.6rem 0.75rem;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.output-sample-item:hover {
  border-color: var(--teal);
  background: rgba(43, 217, 168, 0.08);
}

.output-sample-item .sample-name {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text);
}

.output-sample-item .sample-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ─── Fragment Lock & Single Atom Move Panel ─── */
.builder-locked-notice {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: var(--radius-s);
  padding: 0.35rem 0.55rem;
  font-size: 0.72rem;
  color: #93c5fd;
  line-height: 1.35;
  margin-bottom: 0.45rem;
}

.builder3d-atom-move-panel {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-s);
  padding: 0.6rem 0.75rem;
  margin-top: 0.5rem;
}

.input-tiny {
  width: 100%;
  padding: 0.25rem 0.35rem;
  font-size: 0.75rem;
  background: var(--ink);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
}

.input-tiny:focus {
  border-color: var(--teal);
  outline: none;
}

/* ─── Dual-Stage Workflow & Queue Governor Styles ─── */
.wizard-workflow-switch {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
  background: var(--ink-2);
  padding: 0.35rem;
  border-radius: var(--radius-s);
  border: 1px solid var(--border);
}

.workflow-option-btn {
  flex: 1;
  padding: 0.55rem 0.8rem;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.workflow-option-btn.is-active {
  background: var(--surface);
  color: var(--teal);
  border-color: rgba(43, 217, 168, 0.4);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.stage-header-card {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(147, 51, 234, 0.1));
  border: 1px solid rgba(59, 130, 246, 0.35);
  border-radius: var(--radius-s);
  padding: 0.65rem 0.9rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.stage-pill {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: #3b82f6;
  color: #fff;
}

.stage-pill.stage-2 {
  background: #a855f7;
}

.dual-output-tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.4rem;
}

.dual-output-tab {
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--ink-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  color: var(--text-muted);
  cursor: pointer;
}

.dual-output-tab.is-active {
  background: rgba(43, 217, 168, 0.15);
  border-color: var(--teal);
  color: var(--teal);
}

/* ─── Jobs Queue Governor Banner ─── */
.jobs-queue-governor-banner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.85), rgba(30, 41, 59, 0.9));
  border: 1px solid var(--border);
  border-radius: var(--radius-s);
  padding: 0.65rem 1rem;
  margin-bottom: 1rem;
}

.queue-stat-pill {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--text);
  font-family: var(--font-mono);
}

.queue-stat-pill strong {
  color: var(--teal);
}

.status-waiting_dependency {
  background: rgba(168, 85, 247, 0.2);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.4);
}

.job-stage-badge {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  margin-left: 0.35rem;
  text-transform: uppercase;
}

.stage-badge-1 {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.4);
}

.stage-badge-2 {
  background: rgba(168, 85, 247, 0.2);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.4);
}