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

/* ── Design tokens — dark sci-fi (default) ──────────────────────── */
:root {
  /* Base palette */
  --bg:            #070f1c;
  --surface:       #0b1829;
  --surface2:      #0f2035;
  --text:          #92bdd4;
  --text-muted:    rgba(110, 165, 195, 0.55);
  --accent:        #4dd9ec;
  --accent-hover:  #7be6f5;
  --accent-light:  rgba(77, 217, 236, 0.09);
  --danger:        #f06060;
  --success:       #4ade80;
  --warning:       #f6ad55;
  --border:        rgba(77, 217, 236, 0.15);
  --border-strong: rgba(77, 217, 236, 0.28);
  --radius:        4px;
  --shadow:        0 2px 10px rgba(0, 0, 0, 0.55);
  --shadow-md:     0 6px 28px rgba(0, 0, 0, 0.70);

  /* Sidebar component tokens */
  --sb-bg:          #070f1c;
  --sb-border:      rgba(77, 217, 236, 0.12);
  --sb-brand:       #4dd9ec;
  --sb-section:     rgba(77, 217, 236, 0.28);
  --sb-link:        rgba(135, 185, 215, 0.65);
  --sb-hover-bg:    rgba(77, 217, 236, 0.06);
  --sb-hover-brd:   rgba(77, 217, 236, 0.10);
  --sb-active-bg:   rgba(77, 217, 236, 0.10);
  --sb-active-brd:  rgba(77, 217, 236, 0.22);
  --sb-toggle-brd:  rgba(77, 217, 236, 0.20);
  --sb-toggle-clr:  rgba(77, 217, 236, 0.45);
  --sb-avatar-bg:   rgba(77, 217, 236, 0.12);
  --sb-avatar-brd:  rgba(77, 217, 236, 0.28);
  --sb-avatar-clr:  #4dd9ec;
  --sb-xp-bg:       rgba(77, 217, 236, 0.09);
  --sb-xp-brd:      rgba(77, 217, 236, 0.20);
  --sb-footer-brd:  rgba(77, 217, 236, 0.10);

  /* Form tokens */
  --input-bg:       #0f2035;
  --input-border:   rgba(77, 217, 236, 0.20);
  --focus-ring:     rgba(77, 217, 236, 0.15);

  /* Tag/comment tokens */
  --tag-question:  #4dd9ec;
  --tag-suggestion:#4ade80;
  --tag-correction:#f06060;
  --tag-praise:    #f6ad55;

  /* Typography */
  --font-body: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', Courier, monospace;
}

/* ── Classic theme override ──────────────────────────────────────── */
[data-theme="classic"] {
  --bg:            #f5f6f8;
  --surface:       #ffffff;
  --surface2:      #f0f2f5;
  --text:          #1a202c;
  --text-muted:    #6c757d;
  --accent:        #2b6cb0;
  --accent-hover:  #2c5282;
  --accent-light:  #ebf4ff;
  --danger:        #c53030;
  --success:       #276749;
  --warning:       #744210;
  --border:        #e2e6ea;
  --border-strong: #c8d0d8;
  --radius:        8px;
  --shadow:        0 1px 4px rgba(0,0,0,.08);
  --shadow-md:     0 4px 12px rgba(0,0,0,.10);
  --tag-question:  #2b6cb0;
  --tag-suggestion:#276749;
  --tag-correction:#c53030;
  --tag-praise:    #744210;
  --font-body:     system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono:     'Courier New', Courier, monospace;

  /* Sidebar */
  --sb-bg:          #ffffff;
  --sb-border:      #e2e6ea;
  --sb-brand:       #2b6cb0;
  --sb-section:     #9aa5b1;
  --sb-link:        #6c757d;
  --sb-hover-bg:    #ebf4ff;
  --sb-hover-brd:   transparent;
  --sb-active-bg:   #ebf4ff;
  --sb-active-brd:  #bee3f8;
  --sb-toggle-brd:  #e2e6ea;
  --sb-toggle-clr:  #6c757d;
  --sb-avatar-bg:   #2b6cb0;
  --sb-avatar-brd:  transparent;
  --sb-avatar-clr:  #ffffff;
  --sb-xp-bg:       #ebf4ff;
  --sb-xp-brd:      #bee3f8;
  --sb-footer-brd:  #e2e6ea;

  /* Form */
  --input-bg:       #ffffff;
  --input-border:   #e2e6ea;
  --focus-ring:     rgba(43, 108, 176, 0.15);
}

/* ── Base ───────────────────────────────────────────────────────── */
body {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

/* ── Layout ─────────────────────────────────────────────────────── */
.app-layout { display: flex; min-height: 100vh; }

/* ── Sidebar ─────────────────────────────────────────────────────── */
.sidebar {
  width: 220px;
  background: var(--sb-bg);
  border-right: 1px solid var(--sb-border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 200;
  overflow-y: auto;
  transition: width .22s ease;
}

.sidebar-brand {
  padding: 16px 12px 14px 18px;
  font-family: var(--font-mono);
  font-weight: 900;
  font-size: .95rem;
  color: var(--sb-brand);
  letter-spacing: .08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--sb-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  min-height: 60px;
}
.sidebar-brand .nav-label { flex: 1; min-width: 0; }
.sidebar-brand .nav-label small {
  display: block;
  font-size: .6rem;
  font-weight: 500;
  color: var(--sb-section);
  letter-spacing: .06em;
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-transform: uppercase;
  font-family: var(--font-mono);
}
.brand-icon { font-size: 1.2rem; display: none; }

.sidebar-toggle {
  background: transparent;
  border: 1px solid var(--sb-toggle-brd);
  border-radius: var(--radius);
  width: 24px; height: 24px;
  cursor: pointer;
  font-size: 1.05rem;
  line-height: 1;
  color: var(--sb-toggle-clr);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 0;
  transition: background .15s, color .15s;
}
.sidebar-toggle:hover {
  background: var(--sb-hover-bg);
  color: var(--accent);
  border-color: var(--sb-active-brd);
}

.sidebar-nav {
  flex: 1;
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.nav-section-label {
  font-family: var(--font-mono);
  font-size: .58rem;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--sb-section);
  padding: 14px 10px 4px;
  font-weight: 700;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 11px;
  border-radius: var(--radius);
  color: var(--sb-link);
  font-size: .86rem;
  font-weight: 500;
  transition: background .12s, color .12s;
  border: 1px solid transparent;
  letter-spacing: .01em;
}
.sidebar-nav a .nav-icon { font-size: .95rem; flex-shrink: 0; }
.sidebar-nav a:hover {
  background: var(--sb-hover-bg);
  color: var(--accent);
  text-decoration: none;
  border-color: var(--sb-hover-brd);
}
.sidebar-nav a.active {
  background: var(--sb-active-bg);
  color: var(--accent);
  font-weight: 600;
  border-color: var(--sb-active-brd);
}

.sidebar-footer {
  padding: 12px 12px 16px;
  border-top: 1px solid var(--sb-footer-brd);
}

.sidebar-user { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.sidebar-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--sb-avatar-bg);
  border: 1px solid var(--sb-avatar-brd);
  color: var(--sb-avatar-clr);
  display: flex; align-items: center; justify-content: center;
  font-size: .82rem; font-weight: 700;
  flex-shrink: 0;
  font-family: var(--font-body);
}
.sidebar-username {
  font-size: .83rem; font-weight: 600;
  color: var(--text);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.sidebar-xp { margin-bottom: 10px; }
.sidebar-xp-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 5px; }
.sidebar-xp-level {
  font-family: var(--font-mono);
  font-size: .64rem; font-weight: 700;
  background: var(--sb-xp-bg);
  border: 1px solid var(--sb-xp-brd);
  color: var(--accent);
  border-radius: 2px;
  padding: 2px 7px;
  letter-spacing: .06em;
  text-transform: uppercase;
}
.sidebar-xp-pts { font-size: .7rem; color: var(--text-muted); }
.sidebar-xp-bar { height: 3px; background: var(--border); border-radius: 2px; overflow: hidden; }
.sidebar-xp-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--success)); border-radius: 2px; transition: width .4s; width: 0%; }

/* Theme toggle button */
.theme-toggle-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 7px 11px;
  border-radius: var(--radius);
  border: 1px solid var(--sb-toggle-brd);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: .82rem;
  transition: all .15s;
  text-align: left;
  margin-top: 8px;
}
.theme-toggle-btn:hover {
  background: var(--sb-hover-bg);
  color: var(--accent);
  border-color: var(--sb-active-brd);
}
.theme-toggle-icon { font-size: .95rem; flex-shrink: 0; }

.sidebar-nav a .nav-label,
.sidebar-footer .nav-label,
.nav-section-label { transition: opacity .15s; }

/* Collapsed sidebar */
.sidebar.collapsed { width: 52px; }
.sidebar.collapsed .nav-label,
.sidebar.collapsed .nav-section-label { opacity: 0; width: 0; overflow: hidden; white-space: nowrap; }
.sidebar.collapsed .sidebar-nav a { justify-content: center; padding: 10px 0; }
.sidebar.collapsed .sidebar-nav a .nav-icon { margin: 0; }
.sidebar.collapsed .sidebar-footer { padding: 12px 8px; }
.sidebar.collapsed .sidebar-avatar { margin: 0 auto; }
.sidebar.collapsed .sidebar-user { justify-content: center; }
.sidebar.collapsed .brand-icon { display: block; }
.sidebar.collapsed .sidebar-brand { justify-content: center; padding: 16px 0; }
.sidebar.collapsed .sidebar-toggle { margin: 0 auto; }
.sidebar.collapsed .sidebar-logout { display: none; }
.sidebar.collapsed .theme-toggle-btn { display: none; }

.main-area {
  margin-left: 220px; min-height: 100vh; flex: 1; min-width: 0;
  transition: margin-left .22s ease;
}
.main-area.sidebar-collapsed { margin-left: 52px; }

.container { max-width: 1100px; margin: 0 auto; padding: 28px 24px; }
.page-title { font-size: 1.4rem; font-weight: 700; margin-bottom: 20px; color: var(--text); }
.section-title {
  font-family: var(--font-mono);
  font-size: .65rem; font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .14em;
}

h1, h2, h3, h4, h5, h6 { color: var(--text); font-family: var(--font-body); }
small { color: var(--text-muted); }

/* ── Cards ─────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card-sm { padding: 14px 16px; }
.card + .card { margin-top: 12px; }

/* ── Buttons ────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: .875rem; font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
  letter-spacing: .02em;
}
.btn-primary  { background: var(--accent); color: #020f1a; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 0 14px rgba(77,217,236,.35); }
.btn-outline  { background: transparent; border-color: var(--border-strong); color: var(--accent); }
.btn-outline:hover { border-color: var(--accent); background: var(--accent-light); }
.btn-danger   { background: var(--danger); color: #fff; }
.btn-danger:hover { filter: brightness(1.12); }
.btn-sm       { padding: 5px 10px; font-size: .8rem; }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn-ai {
  background: linear-gradient(135deg, rgba(107,70,193,.75), var(--accent-light));
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: .82rem; padding: 6px 12px;
}
.btn-ai:hover { opacity: .88; }

/* Bootstrap shims used in templates */
.btn-info             { background: var(--accent-light); color: var(--accent); border: 1px solid var(--border-strong); }
.btn-info:hover       { background: rgba(77,217,236,.16); text-decoration: none; color: var(--accent); }
.btn-outline-secondary{ background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-outline-secondary:hover { color: var(--text); border-color: var(--border-strong); text-decoration: none; }
.me-2  { margin-right: 8px; }
.mb-0  { margin-bottom: 0; }
.mb-2  { margin-bottom: 8px; }
.d-flex{ display: flex; }
.justify-content-between { justify-content: space-between; }
.align-items-center { align-items: center; }

/* ── AI suggestion box ──────────────────────────────────────────── */
.ai-suggestion-box {
  background: var(--accent-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px; margin-bottom: 14px;
}
.ai-suggestion-title { font-weight: 600; font-size: .9rem; margin-bottom: 6px; color: var(--text); }
.ai-suggestion-hypothesis { font-size: .85rem; color: var(--text-muted); line-height: 1.5; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Forms ─────────────────────────────────────────────────────── */
.form-group { margin-bottom: 16px; }
label { display: block; font-size: .85rem; font-weight: 500; margin-bottom: 5px; color: var(--text-muted); }
input[type=text], input[type=password], input[type=email],
textarea, select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--input-border);
  border-radius: var(--radius);
  font-size: .9rem;
  font-family: var(--font-body);
  background: var(--input-bg);
  color: var(--text);
  transition: border-color .15s;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--focus-ring);
}
textarea { resize: vertical; min-height: 80px; }
.form-hint  { font-size: .78rem; color: var(--text-muted); margin-top: 4px; }
.form-error { color: var(--danger); font-size: .82rem; margin-top: 4px; }
select option { background: var(--surface); color: var(--text); }
input[type=range] { width: 100%; accent-color: var(--accent); }

/* ── Grid ───────────────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
@media (max-width: 768px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

/* ── Feed / experiment cards ────────────────────────────────────── */
.feed-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }

.exp-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 10px;
  transition: border-color .2s, box-shadow .2s;
  cursor: pointer;
}
.exp-card:hover { border-color: var(--border-strong); box-shadow: 0 4px 18px rgba(77,217,236,.07); }
.exp-card-title { font-weight: 600; font-size: .95rem; line-height: 1.3; color: var(--text); }
.exp-card-meta  { font-size: .78rem; color: var(--text-muted); }
.exp-card-smiles {
  font-family: var(--font-mono);
  font-size: .73rem;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 5px 8px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  color: var(--accent);
  opacity: .8;
}
.exp-card-scores { display: flex; gap: 10px; flex-wrap: wrap; }
.score-badge {
  font-size: .7rem; font-weight: 600;
  padding: 2px 7px; border-radius: 2px;
  background: var(--accent-light); color: var(--accent);
  font-family: var(--font-mono);
}
.score-badge.dti { background: rgba(74,222,128,.09); color: var(--success); }
.score-badge.sas { background: rgba(246,173,85,.09);  color: var(--warning); }

.exp-card-actions {
  display: flex; align-items: center; gap: 12px;
  margin-top: auto; padding-top: 8px;
  border-top: 1px solid var(--border);
}
.like-btn {
  background: none; border: none; cursor: pointer;
  display: flex; align-items: center; gap: 4px;
  font-size: .82rem; color: var(--text-muted);
  padding: 4px 6px; border-radius: var(--radius);
  transition: all .15s;
}
.like-btn:hover, .like-btn.liked { color: var(--danger); }
.like-btn.liked span.heart::before { content: "♥"; }
.like-btn span.heart::before { content: "♡"; }

/* ── Pill tabs ──────────────────────────────────────────────────── */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab-btn {
  background: none; border: none; cursor: pointer;
  padding: 8px 16px; font-size: .875rem; font-weight: 500;
  color: var(--text-muted); border-bottom: 2px solid transparent;
  margin-bottom: -1px; font-family: var(--font-body);
  transition: color .15s, border-color .15s;
}
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Status badges ──────────────────────────────────────────────── */
.badge {
  display: inline-block; font-size: .65rem; font-weight: 700;
  padding: 2px 8px; border-radius: 2px;
  text-transform: uppercase; letter-spacing: .06em;
  font-family: var(--font-mono);
}
.badge-draft     { background: rgba(110,165,195,.09); color: var(--text-muted); }
.badge-published { background: rgba(74,222,128,.09);  color: var(--success); border: 1px solid rgba(74,222,128,.2); }
.badge-retracted { background: rgba(240,96,96,.09);   color: var(--danger);  border: 1px solid rgba(240,96,96,.2); }
.badge-new       { background: rgba(240,96,96,.12);   color: var(--danger);  font-size: .58rem; }

/* ── Comment section ────────────────────────────────────────────── */
.comment-thread { display: flex; flex-direction: column; gap: 12px; }
.comment-item {
  display: flex; flex-direction: column; gap: 6px;
  padding: 12px 14px; background: var(--surface2);
  border-radius: var(--radius); border: 1px solid var(--border);
}
.comment-item.reply { margin-left: 28px; background: var(--surface); }
.comment-author { font-weight: 600; font-size: .82rem; color: var(--text); }
.comment-meta   { font-size: .75rem; color: var(--text-muted); }
.comment-body   { font-size: .875rem; line-height: 1.5; color: var(--text); }
.comment-tag {
  display: inline-block; font-size: .68rem;
  padding: 1px 7px; border-radius: 2px;
  font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
}
.tag-question   { background: rgba(77,217,236,.09);  color: var(--tag-question); }
.tag-suggestion { background: rgba(74,222,128,.09);  color: var(--tag-suggestion); }
.tag-correction { background: rgba(240,96,96,.09);   color: var(--tag-correction); }
.tag-praise     { background: rgba(246,173,85,.09);  color: var(--tag-praise); }

/* ── Results table ──────────────────────────────────────────────── */
.results-table { width: 100%; border-collapse: collapse; font-size: .82rem; }
.results-table th {
  background: var(--surface2);
  border-bottom: 1px solid var(--border-strong);
  padding: 8px 10px; text-align: left;
  font-weight: 700; font-family: var(--font-mono);
  font-size: .65rem; text-transform: uppercase; letter-spacing: .1em;
  color: var(--text-muted); white-space: nowrap;
}
.results-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle; color: var(--text);
}
.results-table tr:hover td { background: var(--accent-light); }
.results-table .smiles-cell {
  font-family: var(--font-mono); font-size: .73rem;
  max-width: 200px; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
  color: var(--accent); opacity: .75;
}
.rank-1 td:first-child { font-weight: 700; color: var(--accent); }
.pass { color: var(--success); font-weight: 600; }
.fail { color: var(--danger); }

/* ── Mol SVG preview ────────────────────────────────────────────── */
.mol-preview {
  width: 100%; max-width: 280px; height: 180px;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface2);
  display: flex; align-items: center; justify-content: center;
}
.mol-preview img { max-width: 100%; max-height: 100%; }

/* ── Run page layout ────────────────────────────────────────────── */
.run-layout { display: grid; grid-template-columns: 380px 1fr; gap: 24px; align-items: start; }
@media (max-width: 900px) { .run-layout { grid-template-columns: 1fr; } }

/* ── Login page ─────────────────────────────────────────────────── */
.login-wrap {
  min-height: 100vh; display: flex;
  align-items: center; justify-content: center;
  background: var(--bg);
}
.login-card { width: 100%; max-width: 380px; padding: 36px; }
.login-logo {
  font-family: var(--font-mono);
  font-size: 1.55rem; font-weight: 900;
  color: var(--accent);
  letter-spacing: .1em; text-transform: uppercase;
  margin-bottom: 6px;
}
[data-theme="classic"] .login-logo { text-shadow: none; }
.login-sub { color: var(--text-muted); font-size: .875rem; margin-bottom: 28px; }

/* ── Alert / flash ──────────────────────────────────────────────── */
.alert { padding: 10px 14px; border-radius: var(--radius); font-size: .875rem; margin-bottom: 14px; }
.alert-error   { background: rgba(240,96,96,.08);  color: var(--danger);  border: 1px solid rgba(240,96,96,.2); }
.alert-success { background: rgba(74,222,128,.08); color: var(--success); border: 1px solid rgba(74,222,128,.2); }

/* ── Loader ─────────────────────────────────────────────────────── */
.spinner {
  width: 24px; height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  margin: 0 auto;
}
.loading-wrap { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 40px; color: var(--text-muted); }

/* ── Misc utils ─────────────────────────────────────────────────── */
.empty-state { text-align: center; padding: 48px 20px; color: var(--text-muted); }
.empty-state p { margin-top: 8px; font-size: .875rem; }
.divider { border: none; border-top: 1px solid var(--border); margin: 20px 0; }
.text-muted { color: var(--text-muted); }
.text-sm    { font-size: .82rem; }
.mt-8  { margin-top:  8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.flex  { display: flex; }
.items-center      { align-items: center; }
.gap-8             { gap: 8px; }
.gap-12            { gap: 12px; }
.justify-between   { justify-content: space-between; }
.w-full            { width: 100%; }

/* ── Scrollbar ──────────────────────────────────────────────────── */
::-webkit-scrollbar        { width: 5px; height: 5px; }
::-webkit-scrollbar-track  { background: var(--bg); }
::-webkit-scrollbar-thumb  { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }