/* ═══════════════════════════════════════════════════════════════
   chem-resolver — Deep Lab Dark  (+ light theme via data-theme)
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@600..720&family=Fira+Code:wght@400;500&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500&display=swap');

/* ── Light theme (default) ───────────────────────────────────── */
:root {
  --bg:           #f8fafc;
  --surface:      #ffffff;
  --surface2:     #f1f5f9;
  --border:       #e2e8f0;
  --border-mid:   #cbd5e1;
  --border-hi:    #94a3b8;

  --text:         #0f172a;
  --text-muted:   #475569;
  --text-faint:   #94a3b8;

  --accent:       #0891b2;
  --accent-hover: #0e7490;

  --found-bg:        rgba(5,150,105,0.06);
  --found-border:    #059669;
  --found-border-hi: #047857;
  --found-text:      #065f46;
  --found-badge:     #059669;

  --invalid-bg:     rgba(220,38,38,0.06);
  --invalid-border: #dc2626;
  --invalid-text:   #b91c1c;
  --invalid-badge:  #dc2626;

  --warn-bg:     rgba(245,158,11,0.08);
  --warn-border: #f59e0b;
  --warn-text:   #92400e;
  --warn-badge:  #d97706;

  --error-bg:     rgba(220,38,38,0.06);
  --error-border: #dc2626;
  --error-text:   #b91c1c;

  --font-sans:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'Fira Code', 'Courier New', monospace;
  --font-display: 'Syne', sans-serif;

  --radius:    3px;
  --radius-lg: 5px;
  --shadow:    0 1px 3px rgba(0,0,0,0.06), 0 4px 14px rgba(0,0,0,0.08);
  --shadow-md: 0 8px 32px rgba(0,0,0,0.12);

  /* ── Derived / semantic (all rgba values live here) ── */
  --accent-glow-text:    rgba(8,145,178,0.15);
  --accent-glow-focus:   rgba(8,145,178,0.15);
  --accent-glow-ambient: rgba(8,145,178,0.05);
  --accent-glow-btn:     rgba(8,145,178,0.15);
  --accent-bg-subtle:    rgba(8,145,178,0.08);
  --accent-bg-faint:     rgba(8,145,178,0.05);
  --dot-color:           rgba(8,145,178,0.12);
  --top-glow:            rgba(8,145,178,0.06);
  --surface-highlight:   rgba(0,0,0,0.03);
  --row-divider:         rgba(0,0,0,0.05);
  --found-glow-near:     rgba(5,150,105,0.12);
  --found-glow-far:      rgba(5,150,105,0.05);
  --invalid-glow:        rgba(220,38,38,0.10);
  --structure-bg:        #ffffff;

  /* ── Type scale ── */
  --fs-display: 2.1rem;    /* h1 */
  --fs-name:    1.25rem;   /* compound name subtitle */
  --fs-heading: 0.9rem;    /* modal + expand titles */
  --fs-body:    0.88rem;   /* input, textarea, result values */
  --fs-data:    0.82rem;   /* code values, table content */
  --fs-ui:      0.75rem;   /* tooltips, links */
  --fs-label:   0.68rem;   /* field labels, hints, buttons */
  --fs-micro:   0.62rem;   /* badges, chips, footer */
}

/* ── Dark theme override ─────────────────────────────────────── */
[data-theme="dark"] {
  --bg:           #05080f;
  --surface:      #090e1c;
  --surface2:     #0d1424;
  --border:       #162030;
  --border-mid:   #1e2f46;
  --border-hi:    #28405e;

  --text:         #d4e4f4;
  --text-muted:   #6080a0;
  --text-faint:   #4a6a8a;

  --accent:       #22d3ee;
  --accent-hover: #06b6d4;

  --found-bg:        rgba(5,150,105,0.13);
  --found-border:    #059669;
  --found-border-hi: #059669;
  --found-text:      #34d399;
  --found-badge:     #059669;

  --invalid-bg:     rgba(185,28,28,0.08);
  --invalid-border: #991b1b;
  --invalid-text:   #f87171;
  --invalid-badge:  #dc2626;

  --warn-bg:     rgba(180,83,9,0.08);
  --warn-border: #92400e;
  --warn-text:   #fbbf24;
  --warn-badge:  #d97706;

  --error-bg:     rgba(185,28,28,0.07);
  --error-border: #991b1b;
  --error-text:   #f87171;

  --shadow:    0 2px 8px rgba(0,0,0,0.6);
  --shadow-md: 0 8px 40px rgba(0,0,0,0.7);

  --accent-glow-text:    rgba(34,211,238,0.30);
  --accent-glow-focus:   rgba(34,211,238,0.10);
  --accent-glow-ambient: rgba(34,211,238,0.06);
  --accent-glow-btn:     rgba(34,211,238,0.25);
  --accent-bg-subtle:    rgba(34,211,238,0.07);
  --accent-bg-faint:     rgba(34,211,238,0.04);
  --dot-color:           rgba(34,211,238,0.08);
  --top-glow:            rgba(34,211,238,0.05);
  --surface-highlight:   rgba(255,255,255,0.025);
  --row-divider:         rgba(255,255,255,0.03);
  --found-glow-near:     rgba(5,150,105,0.10);
  --found-glow-far:      rgba(5,150,105,0.08);
  --invalid-glow:        rgba(153,27,27,0.15);
  --structure-bg:        #0d1424;
}

/* ── Reset ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Body + molecular dot-grid background ────────────────────── */
body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 100% 35% at 50% 0%, var(--top-glow) 0%, transparent 70%),
    radial-gradient(circle at 1px 1px, var(--dot-color) 1px, transparent 0);
  background-size: 100% 100%, 28px 28px;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 0 1rem;
}

/* ── Layout ─────────────────────────────────────────────────── */
.page-wrap {
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  flex: 1;
}

/* ── Header ─────────────────────────────────────────────────── */
.site-header {
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid var(--border-mid);
  margin-bottom: 2rem;
  position: relative;
  overflow: hidden;
}

.site-header-hex {
  position: absolute;
  right: -24px;
  top: -24px;
  width: 170px;
  height: 170px;
  color: var(--accent);
  opacity: 0.06;
  pointer-events: none;
}

.site-header h1 {
  font-family: var(--font-display);
  font-size: var(--fs-display);
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
  line-height: 1;
}

.h1-primary {
  color: var(--accent);
  font-weight: 720;
}

.h1-validator {
  color: var(--text-muted);
  font-weight: 700;
}

.site-header p {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  color: var(--text-faint);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 0.5rem;
}

/* ── Theme toggle ────────────────────────────────────────────── */
.theme-toggle {
  position: absolute;
  top: 0.5rem;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--border-hi);
  background: var(--accent-bg-faint);
}

.theme-toggle svg { width: 15px; height: 15px; }

/* Light mode (default): show moon icon (click → go dark) */
.theme-icon--sun  { display: none; }
.theme-icon--moon { display: block; }

/* Dark mode: show sun icon (click → go light) */
[data-theme="dark"] .theme-icon--sun  { display: block; }
[data-theme="dark"] .theme-icon--moon { display: none; }

/* ── Tab bar ─────────────────────────────────────────────────── */
.tab-bar {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-mid);
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover { color: var(--text); }

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  text-shadow: 0 0 12px var(--accent-glow-text);
}

.tab-version {
  font-size: var(--fs-micro);
  color: var(--text-faint);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top-color: var(--border-mid);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow), inset 0 1px 0 var(--surface-highlight);
  position: relative;
}

.card-reset {
  position: absolute;
  top: 1.1rem;
  right: 1.25rem;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.5rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.card-reset:hover {
  color: var(--invalid-text);
  border-color: var(--invalid-border);
  background: var(--invalid-bg);
}

.card-reset svg {
  width: 11px;
  height: 11px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.card-reset:hover svg { transform: rotate(-45deg); }

.card-title {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
}

.card-title-hint {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.3em;
  height: 1.3em;
  margin-left: 0.6em;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--font-sans);
  font-size: 0.7em;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-faint);
  cursor: default;
  position: static;
  vertical-align: middle;
}

.card-title-hint-wrap {
  position: relative;
  display: inline-flex;
  margin-top: -0.15em;
}

.card-title-hint-wrap .card-title-tooltip {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  transform: none;
  background: var(--surface);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: var(--fs-ui);
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  white-space: nowrap;
  padding: 0.35em 0.65em;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 100;
}

.card-title-hint-wrap:hover .card-title-tooltip {
  opacity: 1;
}

/* ── Form elements ──────────────────────────────────────────── */
label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

input[type="text"] {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: var(--fs-body);
  color: var(--text);
  background: var(--bg);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  margin-bottom: 0.9rem;
}

input[type="text"]::placeholder { color: var(--text-faint); }

input[type="text"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow-focus), 0 0 16px var(--accent-glow-ambient);
}

input[type="file"] {
  font-family: var(--font-mono);
  font-size: var(--fs-ui);
  color: var(--text-muted);
  margin-bottom: 0.9rem;
  display: block;
  cursor: pointer;
}

input[type="file"]::file-selector-button {
  background: var(--surface2);
  color: var(--text-muted);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  padding: 0.35rem 0.85rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  margin-right: 0.6rem;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

input[type="file"]::file-selector-button:hover {
  background: var(--border);
  color: var(--text);
  border-color: var(--border-hi);
}

.hint {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  color: var(--text-faint);
  margin-bottom: 0.9rem;
  margin-top: -0.5rem;
  letter-spacing: 0.04em;
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent);
  color: var(--bg);
  border: none;
  padding: 0.8rem 1.4rem;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: var(--fs-ui);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s, transform 0.1s;
}

.btn:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 20px var(--accent-glow-btn);
}

.btn:active,
.btn--pressed { transform: scale(0.98); background: var(--accent-hover); }

.btn-sm {
  padding: 0.35rem 0.85rem;
  font-size: var(--fs-label);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-mid);
  box-shadow: none;
}

.btn-ghost:hover {
  background: var(--surface2);
  color: var(--text);
  box-shadow: none;
}

/* ── Loading indicator ───────────────────────────────────────── */
.indicator {
  display: none;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  color: var(--text-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.indicator::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  border: 1.5px solid var(--border-mid);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.htmx-request .indicator { display: inline-flex; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Result states ───────────────────────────────────────────── */
.result-box {
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin-top: 1rem;
  animation: fadeIn 0.22s ease;
}


@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); filter: blur(2px); }
  to   { opacity: 1; transform: translateY(0);   filter: blur(0);   }
}

.result-box.valid {
  background: var(--found-bg);
  border: 1px solid var(--found-border);
  box-shadow: 0 0 0 1px var(--found-glow-near), 0 4px 32px var(--found-glow-far);
}

.result-box.invalid {
  background: var(--invalid-bg);
  border: 1px solid var(--invalid-border);
  box-shadow: 0 0 0 1px var(--invalid-glow);
}

.result-box.warning {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
}

.result-box.error {
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  box-shadow: 0 0 0 1px var(--invalid-glow);
}

/* ── Status badge ────────────────────────────────────────────── */
.status-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.2em 0.65em;
  border-radius: 2px;
  margin-bottom: 0.9rem;
}

.status-badge.valid      { background: var(--found-badge);   color: var(--bg); }
.status-badge.invalid    { background: var(--invalid-badge);  color: var(--surface); }
.status-badge.deprecated { background: var(--warn-badge);    color: var(--surface); }
.status-badge.error-tag  { background: var(--error-border);  color: var(--surface); }

/* ── Result fields table ─────────────────────────────────────── */
.result-fields {
  border-collapse: collapse;
  width: 100%;
  table-layout: fixed;
  margin-top: 0.25rem;
}

.result-fields td {
  padding: 0.32rem 0;
  vertical-align: middle;
  border-bottom: 1px solid var(--row-divider);
}

.result-fields tr:last-child td { border-bottom: none; }

.result-fields td:first-child {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  white-space: nowrap;
  padding-right: 1.5rem;
  width: 6.5rem;
}

.result-fields td:last-child {
  font-size: var(--fs-body);
  color: var(--text);
  overflow: hidden;
  min-width: 0;
}

.result-fields a {
  color: var(--accent);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: var(--fs-data);
}

.result-fields a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.code-value {
  font-family: var(--font-mono);
  font-size: var(--fs-data);
}

/* ── Progress bar ────────────────────────────────────────────── */
.progress-wrap {
  display: none;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.progress-bar {
  flex: 1;
  height: 1px;
  background: var(--border);
  overflow: hidden;
}

.progress-bar.htmx-request {
  display: block;
  background: var(--border);
}

.progress-bar.htmx-request::after {
  content: '';
  display: block;
  height: 100%;
  width: 40%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: progress-slide 1.2s ease-in-out infinite;
}

@keyframes progress-slide {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}


.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  transition: width 0.3s ease;
}

/* ── Input row (input + button inline) ───────────────────────── */
.input-row {
  display: flex;
  align-items: stretch;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.input-row .btn { height: 2.75rem; }
.input-row input[type="text"] { height: 2.75rem; }

.input-row input[type="text"] {
  flex: 1;
  margin-bottom: 0;
}

.input-row .input-wrap {
  flex: 1;
  margin-bottom: 0;
}

.input-row .btn {
  padding-top: 0;
  padding-bottom: 0;
}

/* ── Autocomplete ────────────────────────────────────────────── */
.input-wrap {
  position: relative;
  margin-bottom: 0.9rem;
}

.input-wrap input[type="text"] {
  margin-bottom: 0;
  padding-right: 2.25rem;
}

.input-spinner {
  display: none;
  position: absolute;
  right: 0.65rem;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border: 1.5px solid var(--border-mid);
  border-top-color: var(--accent);
  border-radius: 50%;
  pointer-events: none;
}

.htmx-request .input-spinner,
.input-spinner.htmx-request {
  display: block;
  animation: spin-input 0.7s linear infinite;
}

@keyframes spin-input {
  from { transform: translateY(-50%) rotate(0deg); }
  to   { transform: translateY(-50%) rotate(360deg); }
}

.suggest-dropdown {
  position: absolute;
  top: calc(100% + 3px);
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--surface2);
  border-radius: var(--radius);
  overflow: hidden;
}

.suggest-dropdown:not(:empty) {
  border: 1px solid var(--border-mid);
  box-shadow: var(--shadow-md);
  animation: suggestIn 0.1s ease;
}

@keyframes suggestIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.suggest-dropdown:not(:empty)::after {
  content: '↑ ↓ navigate · Enter select';
  display: block;
  padding: 0.3rem 0.9rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--text-faint);
  letter-spacing: 0.04em;
  border-top: 1px solid var(--border);
}

.suggest-list {
  list-style: none;
  margin: 0;
  padding: 0.3rem 0;
}

.suggest-item {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  transition: background 0.1s;
}

.suggest-item:hover,
.suggest-item--active { background: var(--border); }

.suggest-item--active .suggest-name { color: var(--text); }

.suggest-code {
  font-family: var(--font-mono);
  font-size: var(--fs-data);
  font-weight: 500;
  color: var(--accent);
  white-space: nowrap;
  flex-shrink: 0;
}

.suggest-name {
  font-family: var(--font-mono);
  font-size: var(--fs-data);
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.suggest-item:hover .suggest-name { color: var(--text); }

/* ── Similar suggestions ─────────────────────────────────────── */
.similar-suggestions {
  margin-top: 0.75rem;
  border-top: 1px solid var(--invalid-border);
  padding-top: 0.75rem;
}

.similar-label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--invalid-text);
  margin-bottom: 0.4rem;
}

/* ── Copy button ─────────────────────────────────────────────── */
.copyable-row td:last-child {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  overflow: hidden;
}

.field-value {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

/* Code values (SMILES, InChIKey, CAS…) — single line with ellipsis */
.field-value.code-value {
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Plain text values (IUPAC name) — wrap naturally */
.field-value:not(.code-value) {
  word-break: break-word;
}

.copy-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  padding: 0;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--text-faint);
  cursor: pointer;
  opacity: 0.45;
  transition: opacity 0.15s, color 0.15s, border-color 0.15s, background 0.15s;
}

.copyable-row:hover .copy-btn { opacity: 1; }

.copy-btn:hover {
  color: var(--accent);
  border-color: var(--border-mid);
  background: var(--accent-bg-subtle);
  opacity: 1;
}

.copy-btn svg { width: 12px; height: 12px; display: block; }
.copy-btn .icon-copy  { display: block; }
.copy-btn .icon-check { display: none; }

.copy-btn--done {
  opacity: 1;
  color: var(--found-text);
  border-color: var(--found-border-hi);
  background: var(--found-bg);
}

.copy-btn--done .icon-copy  { display: none; }
.copy-btn--done .icon-check { display: block; }

/* ── Details toggle ──────────────────────────────────────────── */
details { margin-top: 1rem; }

details summary {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.15s;
}

details summary:hover { color: var(--text-muted); }

details summary::before {
  content: '▶';
  font-size: 0.52rem;
  transition: transform 0.15s;
}

details[open] summary::before { transform: rotate(90deg); }
details summary::-webkit-details-marker { display: none; }

/* ── Deprecated warning ──────────────────────────────────────── */
.deprecated-warn {
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn-text);
  font-size: var(--fs-data);
  margin-top: 0.75rem;
  font-family: var(--font-mono);
}

/* ── Utility spacing ─────────────────────────────────────────── */
.mt-sm   { margin-top: 0.75rem; }
.mt-md   { margin-top: 1rem; }
.ml-auto { margin-left: auto; }

/* ── Batch results ───────────────────────────────────────────── */
.summary-bar {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 1rem;
}

.summary-pill {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 0.25em 0.7em;
  border-radius: 2px;
}

.summary-pill.valid   { background: var(--found-bg);    color: var(--found-text);   border: 1px solid var(--found-border);   }
.summary-pill.invalid { background: var(--invalid-bg);  color: var(--invalid-text); border: 1px solid var(--invalid-border); }
.summary-pill.warn    { background: var(--warn-bg);      color: var(--warn-text);    border: 1px solid var(--warn-border);   }
.summary-pill.neutral { background: var(--surface2);     color: var(--text-muted);   border: 1px solid var(--border-mid);    }

.batch-table-wrap { overflow-x: auto; margin-top: 0.5rem; }

.batch-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-data);
}

.batch-table th {
  text-align: left;
  padding: 0.5rem 0.75rem;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  border-bottom: 1px solid var(--border-mid);
  white-space: nowrap;
  position: sticky;
  top: 0;
  background: var(--surface);
  z-index: 2;
}

.batch-table th.sortable { cursor: pointer; user-select: none; }
.batch-table th.sortable:hover { color: var(--text-muted); }
.batch-table th .sort-indicator { margin-left: 0.3em; opacity: 0.4; }
.batch-table th.sort-asc .sort-indicator,
.batch-table th.sort-desc .sort-indicator { opacity: 1; color: var(--accent); }

.batch-table td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.batch-table tbody tr:last-child td { border-bottom: none; }
.batch-table tbody tr:hover { background: var(--surface2); }

.batch-table .col-code {
  font-family: var(--font-mono);
  font-size: var(--fs-data);
  color: var(--text);
}

.batch-table .col-name {
  color: var(--text-muted);
  font-size: var(--fs-data);
  max-width: 280px;
}

.batch-table .col-time {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  color: var(--text-faint);
  white-space: nowrap;
}

/* ── Inline status chips ─────────────────────────────────────── */
.chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2em 0.55em;
  border-radius: 2px;
}

.chip.valid      { background: var(--found-badge);   color: var(--bg); }
.chip.invalid    { background: var(--invalid-badge);  color: var(--surface); }
.chip.warn       { background: var(--warn-badge);     color: var(--surface); }
.chip.deprecated { background: var(--warn-badge);    color: var(--surface); }
.chip.error-tag  { background: var(--error-border);  color: var(--surface); }

.col-status { white-space: nowrap; }

.btn-retry {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 0.4rem;
  padding: 0;
  width: 1.4rem;
  height: 1.4rem;
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  color: var(--text-faint);
  font-size: var(--fs-data);
  cursor: pointer;
  vertical-align: middle;
  transition: color 0.15s, border-color 0.15s;
}
.btn-retry:hover  { color: var(--accent); border-color: var(--accent); }
.btn-retry:disabled { opacity: 0.4; cursor: default; }

/* ── Batch cancel button ─────────────────────────────────────── */
.btn-cancel-batch {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.4rem;
  height: 1.4rem;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  color: var(--text-faint);
  font-size: var(--fs-ui);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.btn-cancel-batch:hover { color: var(--error-text); border-color: var(--error-border); }

/* ── Batch expand row ────────────────────────────────────────── */
.expandable-row { cursor: pointer; }

.expand-chevron {
  width: 1.5rem;
  text-align: center;
  padding-left: 0 !important;
  padding-right: 0.5rem !important;
}

.row-chevron {
  display: inline-block;
  color: var(--text-faint);
  font-size: var(--fs-data);
  transition: transform 0.18s ease;
  line-height: 1;
}

.expandable-row.row-expanded .row-chevron { transform: rotate(90deg); }

.expand-row td { padding: 0; border-bottom: none; }
.expand-row:hover { background: transparent !important; }

.expand-card {
  display: flex;
  gap: 1.5rem;
  padding: 0.9rem 1.25rem 0.9rem 1rem;
  background: var(--surface2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.expand-structure {
  flex-shrink: 0;
  width: 150px;
  height: 130px;
  cursor: zoom-in;
}

.expand-fields {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
  min-width: 0;
  justify-content: center;
}

.expand-title {
  font-family: var(--font-display);
  font-size: var(--fs-heading);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.expand-field {
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
  font-size: var(--fs-data);
}

.expand-label {
  flex-shrink: 0;
  width: 4.5rem;
  color: var(--text-faint);
  font-size: var(--fs-micro);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.expand-code {
  font-family: var(--font-mono);
  font-size: var(--fs-data);
  color: var(--text-muted);
  word-break: break-all;
}

.expand-link {
  color: var(--accent);
  font-size: var(--fs-ui);
  text-decoration: none;
}
.expand-link:hover { text-decoration: underline; }

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
  padding: 1.25rem 2rem 2rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  color: var(--text-faint);
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 0;
}

.site-footer a {
  color: var(--text-faint);
  text-decoration: none;
  transition: color 0.15s;
}

.site-footer a:hover { color: var(--accent); }

/* ── Result body (two-column: fields + structure) ────────────── */
.result-common-name {
  font-family: var(--font-display);
  font-size: var(--fs-name);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.result-body {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.result-body .result-fields {
  flex: 1;
  min-width: 0;
}

/* Narrow screens: stack vertically, structure moves below fields */
@media (max-width: 520px) {
  /* ── Single lookup ── */
  .result-body {
    flex-direction: column;
  }

  .structure-col {
    width: 100%;
  }

  .structure-wrap {
    align-self: center;
  }

  .input-row {
    flex-wrap: wrap;
  }

  .input-row .input-wrap {
    width: 100%;
  }

  .btn {
    padding-top: 0.7rem;
    padding-bottom: 0.7rem;
  }

  /* ── Batch table: hide Formula / MW / CAS — expand card shows them ── */
  .batch-table th:nth-child(4),
  .batch-table td:nth-child(4),
  .batch-table th:nth-child(5),
  .batch-table td:nth-child(5),
  .batch-table th:nth-child(6),
  .batch-table td:nth-child(6) { display: none; }

  /* ── Batch file input: own line so Resolve All wraps alone ── */
  input[type="file"] { width: 100%; }

  /* ── Summary bar: allow pills to wrap ── */
  .summary-bar { flex-wrap: wrap; gap: 0.4rem; }

  /* ── Expand card: stack structure above fields ── */
  .expand-card { flex-direction: column; }
  .expand-structure {
    align-self: center;
  }

  /* ── Structure modal: fit screen width ── */
  .modal-box { width: 95vw; }
  #modal-structure svg { max-width: 100%; height: auto; }
}

/* ── Structure image (specimen on substrate) ─────────────────── */
.structure-wrap {
  flex-shrink: 0;
  position: relative;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  background: var(--structure-bg);
  padding: 0.35rem;
  line-height: 0;
  box-shadow: 0 4px 20px var(--found-glow-near);
  transition: box-shadow 0.15s;
}

.structure-wrap:hover {
  box-shadow: 0 4px 20px var(--found-glow-near), 0 0 0 2px var(--accent);
}

.structure-wrap svg {
  display: block;
  max-width: 100%;
  height: auto;
}

.structure-col {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.structure-pubchem-link {
  font-size: var(--fs-ui);
  color: var(--text-faint);
  text-decoration: none;
  margin-top: 0.3rem;
  letter-spacing: 0.04em;
}
.structure-pubchem-link:hover { color: var(--accent); }

/* Download button — appears on hover */
.structure-dl {
  position: absolute;
  bottom: 0.4rem;
  right: 0.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, color 0.15s, border-color 0.15s;
}

.structure-wrap:hover .structure-dl { opacity: 1; }

.structure-dl--png { right: calc(0.4rem + 22px + 0.25rem); }

.structure-dl:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ── Structure modal ─────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.15s ease;
}

.modal-box {
  background: var(--surface);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-lg);
  padding: 0;
  box-shadow: var(--shadow-md);
  max-width: 90vw;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem 0.75rem;
}

.modal-title {
  font-family: var(--font-display);
  font-size: var(--fs-heading);
  font-weight: 600;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 340px;
}


.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border);
}

.modal-structure {
  padding: 0.5rem 1.25rem;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}

.modal-close:hover {
  color: var(--text);
  background: var(--surface2);
}

.modal-structure {
  background: var(--structure-bg);
  border-radius: var(--radius);
  line-height: 0;
}

/* ── Textarea ────────────────────────────────────────────────── */
textarea {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: var(--fs-body);
  color: var(--text);
  background: var(--bg);
  outline: none;
  resize: vertical;
  transition: border-color 0.15s, box-shadow 0.15s;
  margin-bottom: 0.9rem;
}

textarea::placeholder { color: var(--text-faint); }

textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow-focus), 0 0 16px var(--accent-glow-ambient);
}

/* ── Synonyms ────────────────────────────────────────────────── */
.synonyms-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  padding-top: 0.6rem;
  max-height: 110px;
  overflow-y: auto;
  overflow-x: hidden;
}

.synonym-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  background: var(--accent-bg-faint);
  border: 1px solid var(--border-mid);
  border-radius: 2px;
  padding: 0.15em 0.5em;
  color: var(--text-muted);
  word-break: break-word;
  max-width: 100%;
  letter-spacing: 0.02em;
  transition: border-color 0.12s, color 0.12s;
}

.synonym-tag:hover {
  border-color: var(--border-hi);
  color: var(--text);
}