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

/* Clemson University brand: Regalia #522D80, Burnt Orange #F56600 */
:root {
  /* Dark theme (default) — Clemson branded */
  --bg: #110e18;
  --surface: #1a1525;
  --border: #352b4a;
  --text: #e6edf3;
  --muted: #9990ab;
  --accent: #F56600;
  --accent-secondary: #7b52a8;
  --top: #46e060;
  --mid: #f0b830;
  --low: #ff5c54;
  --willing: #9990ab;
  --radius: 8px;
  --contrast: #fff;
  --contrast-inv: #fff;
  --tooltip-bg: #1e1729;
  --overlay-bg: rgba(0, 0, 0, 0.65);
  --shadow: rgba(0, 0, 0, 0.4);
  --shadow-heavy: rgba(0, 0, 0, 0.5);
  --accent-tint: rgba(245, 102, 0, 0.12);
  --accent-tint-subtle: rgba(245, 102, 0, 0.05);
  --accent-tint-weak: rgba(245, 102, 0, 0.07);
  --accent-tint-soft: rgba(245, 102, 0, 0.09);
  --accent-tint-border: rgba(245, 102, 0, 0.25);
  --accent-tint-badge: rgba(245, 102, 0, 0.18);
  --accent-tint-badge2: rgba(245, 102, 0, 0.22);
  --top-tint: rgba(70, 224, 96, 0.16);
  --top-tint-soft: rgba(70, 224, 96, 0.09);
  --top-tint-badge: rgba(70, 224, 96, 0.14);
  --top-tint-strong: rgba(70, 224, 96, 0.28);
  --top-tint-bg: rgba(70, 224, 96, 0.11);
  --low-tint: rgba(255, 92, 84, 0.17);
  --low-tint-badge: rgba(255, 92, 84, 0.14);
  --low-tint-strong: rgba(255, 92, 84, 0.28);
  --low-tint-bg: rgba(255, 92, 84, 0.11);
  --low-tint-border: rgba(255, 92, 84, 0.35);
  --mid-tint: rgba(240, 184, 48, 0.17);
  --mid-tint-soft: rgba(240, 184, 48, 0.09);
  --mid-tint-border: rgba(240, 184, 48, 0.35);
  --mid-tint-strong: rgba(240, 184, 48, 0.55);
  --mid-tint-badge: rgba(240, 184, 48, 0.32);
  --muted-tint: rgba(153, 144, 171, 0.1);
  --muted-tint-soft: rgba(153, 144, 171, 0.15);
  --muted-tint-badge: rgba(153, 144, 171, 0.3);
  --toggle-knob: #fff;
  --toggle-shadow: rgba(0, 0, 0, 0.3);
  color-scheme: dark light;
}

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

@media (prefers-color-scheme: light) {
  :root {
    /* Light theme — Clemson branded */
    --bg: #ffffff;
    --surface: #f8f6fb;
    --border: #d4cee0;
    --text: #1f1a2e;
    --muted: #6b607f;
    --accent: #d45500;
    --accent-secondary: #522D80;
    --top: #18862e;
    --mid: #b37800;
    --low: #d92d35;
    --willing: #6b607f;
    --contrast: #fff;
    --contrast-inv: #000;
    --tooltip-bg: #f8f6fb;
    --overlay-bg: rgba(0, 0, 0, 0.5);
    --shadow: rgba(82, 45, 128, 0.08);
    --shadow-heavy: rgba(82, 45, 128, 0.14);
    --accent-tint: rgba(212, 85, 0, 0.08);
    --accent-tint-subtle: rgba(212, 85, 0, 0.04);
    --accent-tint-weak: rgba(212, 85, 0, 0.05);
    --accent-tint-soft: rgba(212, 85, 0, 0.06);
    --accent-tint-border: rgba(212, 85, 0, 0.2);
    --accent-tint-badge: rgba(212, 85, 0, 0.1);
    --accent-tint-badge2: rgba(212, 85, 0, 0.14);
    --top-tint: rgba(24, 134, 46, 0.12);
    --top-tint-soft: rgba(24, 134, 46, 0.07);
    --top-tint-badge: rgba(24, 134, 46, 0.12);
    --top-tint-strong: rgba(24, 134, 46, 0.2);
    --top-tint-bg: rgba(24, 134, 46, 0.09);
    --low-tint: rgba(217, 45, 53, 0.12);
    --low-tint-badge: rgba(217, 45, 53, 0.12);
    --low-tint-strong: rgba(217, 45, 53, 0.2);
    --low-tint-bg: rgba(217, 45, 53, 0.09);
    --low-tint-border: rgba(217, 45, 53, 0.28);
    --mid-tint: rgba(179, 120, 0, 0.12);
    --mid-tint-soft: rgba(179, 120, 0, 0.07);
    --mid-tint-border: rgba(179, 120, 0, 0.28);
    --mid-tint-strong: rgba(179, 120, 0, 0.4);
    --mid-tint-badge: rgba(179, 120, 0, 0.22);
    --muted-tint: rgba(107, 96, 127, 0.08);
    --muted-tint-soft: rgba(107, 96, 127, 0.1);
    --muted-tint-badge: rgba(107, 96, 127, 0.2);
    --toggle-knob: #fff;
    --toggle-shadow: rgba(0, 0, 0, 0.15);
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  padding: 0 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

header {
  padding: 1.5rem 0 0.5rem;
  border-bottom: 2px solid var(--accent);
  margin-bottom: 1rem;
}

header h1 { font-size: 1.5rem; font-weight: 600; color: var(--accent); }
.subtitle { color: var(--muted); font-size: 0.9rem; }

/* ── Tabs ── */
#tabs {
  display: flex;
  gap: 0.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
  overflow-x: auto;
}

.tab {
  background: none;
  border: none;
  color: var(--muted);
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.9rem;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent-secondary); }

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

/* ── Cards ── */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.card h3 {
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.stat-value {
  font-size: 1.8rem;
  font-weight: 600;
  line-height: 1.2;
}

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

.card-link { cursor: pointer; transition: border-color 0.15s; }
.card-link:hover { border-color: var(--accent); }
.muted { color: var(--muted); font-size: 0.85rem; margin-bottom: 0.5rem; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  align-items: start;
}

.three-col {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.75rem;
  align-items: start;
}

@media (max-width: 900px) {
  .three-col { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .two-col { grid-template-columns: 1fr; }
  .three-col { grid-template-columns: 1fr; }
}

/* ── Tier bar ── */
.tier-bar {
  display: flex;
  height: 32px;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.tier-bar span {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--contrast);
  min-width: 2rem;
}

.tier-clickable { cursor: pointer; transition: opacity 0.15s; }
.tier-clickable:hover { opacity: 0.8; }

.tier-top { background: var(--top); }
.tier-mid { background: var(--mid); }
.tier-low { background: var(--low); }
.tier-willing { background: var(--willing); }

.tier-legend {
  display: flex;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--muted);
  flex-wrap: wrap;
}

.tier-legend span::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  margin-right: 4px;
  vertical-align: middle;
}

.legend-top::before { background: var(--top); }
.legend-mid::before { background: var(--mid); }
.legend-low::before { background: var(--low); }
.legend-willing::before { background: var(--willing); }

/* ── Instructor bars ── */
.bar-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2px;
  font-size: 0.8rem;
}

.bar-name {
  width: 180px;
  text-align: right;
  flex-shrink: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.bar-track {
  flex: 1;
  height: 20px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

.bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 0.3s;
}

.bar-value {
  width: 50px;
  text-align: right;
  color: var(--muted);
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.bar-link { cursor: pointer; border-radius: 3px; padding: 1px 4px; margin: 0 -4px; }
.bar-link:hover { background: var(--accent-tint); }

.cell-link { cursor: pointer; color: var(--text); border-bottom: 1px dashed var(--border); transition: color 0.1s, border-color 0.1s; }
.cell-link:hover { color: var(--accent); border-bottom-color: var(--accent); }

/* ── Tables ── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

th, td {
  text-align: left;
  padding: 0.4rem 0.6rem;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  position: sticky;
  top: 0;
  background: var(--surface);
}

th:hover { color: var(--text); }
tr:hover td { background: var(--accent-tint-subtle); }

td.score { font-variant-numeric: tabular-nums; text-align: right; }

.row-top { border-left: 3px solid var(--top); }
.row-mid { border-left: 3px solid var(--mid); }
.row-low { border-left: 3px solid var(--low); }
.row-willing { border-left: 3px solid var(--willing); }
.row-manual { background: var(--accent-tint-weak); }
.row-pinned { border-right: 2px solid var(--accent); }
.pin-icon { font-size: 0.75rem; margin-right: 4px; cursor: help; opacity: 0.7; }
.pin-icon-sm { font-size: 0.6rem; margin-left: 2px; vertical-align: super; }
.pin-header { position: absolute; left: -1.4em; top: 50%; transform: translateY(-50%); margin: 0; font-size: 0.65rem; }
.advising-row td {
  border-top: 1px dashed var(--border);
  font-style: italic;
  color: var(--muted);
  padding-top: 0.35rem;
}
.advising-label {
  color: var(--text);
  font-style: normal;
  font-weight: 500;
}

/* ── Controls ── */
.controls {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

input[type="text"], select {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  font-size: 0.85rem;
}

input[type="text"] { flex: 1; min-width: 200px; }
input[type="text"]::placeholder { color: var(--muted); }

/* ── Instructor cards ── */
.instructor-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.instructor-card h3 {
  font-size: 1rem;
  color: var(--text);
  text-transform: none;
  letter-spacing: 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  position: relative;
}

.instructor-card .meta {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.instructor-card table { margin-top: 0.5rem; }
.instructor-card th { background: var(--bg); }

.instructor-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

@media (max-width: 900px) {
  .instructor-detail { grid-template-columns: 1fr; }
}

.instructor-detail h4 {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-bottom: 0.3rem;
}

.pref-section {
  border-left: 2px solid var(--border);
  padding-left: 0.75rem;
}

.pref-table { font-size: 0.8rem; }
.pref-table th { font-size: 0.75rem; }
.manual-col { width: 1.5em; text-align: center; padding: 0 2px; }
.manual-col-header { width: 1.5em; text-align: center; padding: 0 2px; font-size: 0.75rem; }
.pin-active { opacity: 1; }
.pin-inactive { opacity: 0.2; font-size: 0.7rem; cursor: default; }

.pref-assigned td { color: var(--text); }
.pref-unassigned td { color: var(--muted); }

.pref-check {
  color: var(--top);
  font-weight: 700;
  margin-right: 0.15rem;
}

.pref-times {
  margin-top: 0.5rem;
  font-size: 0.78rem;
  line-height: 1.8;
}

.pref-time-label {
  color: var(--muted);
  font-weight: 600;
  margin-right: 0.3rem;
}

.pref-time {
  display: inline-block;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.72rem;
  margin-right: 0.2rem;
}

.pref-time-yes { background: var(--top-tint); color: var(--top); }
.pref-time-no { background: var(--low-tint); color: var(--low); }

.pref-comments {
  margin-top: 0.4rem;
  font-size: 0.78rem;
}

.pref-comment {
  color: var(--muted);
  padding: 0.2rem 0;
  font-style: italic;
  border-top: 1px solid var(--border);
}

.badge {
  display: inline-block;
  font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-weight: 600;
}

.badge-top { background: var(--top); color: var(--contrast); }
.badge-mid { background: var(--mid); color: var(--contrast); }
.badge-low { background: var(--low); color: var(--contrast-inv); }
.badge-willing { background: var(--willing); color: var(--contrast); }

.has-tooltip { cursor: help; }

/* ── Tooltip ── */
#tooltip {
  position: fixed;
  z-index: 100;
  background: var(--tooltip-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.8rem;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text);
  max-width: 440px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s;
  box-shadow: 0 4px 16px var(--shadow);
}

#tooltip.visible { opacity: 1; }

.tip-header {
  font-weight: 600;
  margin-bottom: 0.3rem;
  color: var(--accent);
}

.tip-detail {
  padding-left: 0.5rem;
  color: var(--text);
}

.tip-detail::before {
  content: "·";
  margin-right: 0.4rem;
  color: var(--muted);
}

.tip-whynot-header {
  margin-top: 0.4rem;
  padding-top: 0.4rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.tip-alt {
  padding-left: 0.5rem;
  color: var(--muted);
  font-size: 0.78rem;
}

.tip-alt::before {
  content: "→";
  margin-right: 0.3rem;
}

/* ── Room cell ── */
.room-cell {
  font-size: 0.85rem;
  white-space: nowrap;
  color: var(--muted);
}
.room-cell.has-tooltip {
  text-decoration: underline dotted var(--muted);
  text-underline-offset: 2px;
  cursor: help;
}

/* ── Edit mode (Assignments table) ── */
.edit-cell {
  width: 32px;
  text-align: center;
  padding: 0;
}

.btn-edit {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.9rem;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  transition: color 0.1s, background 0.1s;
}

.btn-edit:hover { color: var(--accent); background: var(--accent-tint); }

.edit-row td {
  padding: 0;
  border-bottom: 2px solid var(--accent);
}

.edit-panel {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.8rem;
  margin: 0.25rem 0;
}

.edit-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
}

.edit-note-row {
  margin-bottom: 0.5rem;
}

.edit-note-row input {
  width: 100%;
  min-width: 0;
}

.candidates-table {
  margin-bottom: 0.5rem;
}

.candidates-table th {
  background: var(--surface);
  position: static;
  cursor: default;
}

.candidate-current td {
  background: var(--accent-tint-soft);
}

.candidate-full td {
  opacity: 0.5;
}

.btn-assign {
  background: var(--accent);
  color: var(--contrast);
  border: none;
  border-radius: 3px;
  padding: 0.2rem 0.5rem;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
}

.btn-assign:hover { opacity: 0.85; }

.btn-warn {
  background: var(--mid);
}

.btn-unassign {
  background: none;
  border: 1px solid var(--low);
  color: var(--low);
  border-radius: 3px;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  font-size: 0.8rem;
}

.btn-unassign:hover { background: var(--low-tint-bg); }

.btn-cancel {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 3px;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  font-size: 0.8rem;
}

.btn-cancel:hover { color: var(--text); border-color: var(--muted); }

.edit-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

/* ── Tuning ── */
.param-group {
  margin-bottom: 0.8rem;
}

.param-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.2rem;
}

.param-val {
  display: inline-block;
  min-width: 2rem;
  text-align: right;
  font-weight: 600;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.param-hint {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.1rem;
}

.param-group select {
  width: 100%;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  height: 4px;
}

.checkbox-label {
  display: flex !important;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

.param-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

.btn-solve {
  background: var(--accent);
  color: var(--contrast);
  border: none;
  border-radius: 4px;
  padding: 0.5rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}

.btn-solve:hover { opacity: 0.85; }
.btn-solve:disabled { opacity: 0.4; cursor: not-allowed; }

.tuning-stat {
  display: flex;
  justify-content: space-between;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.tuning-stat:last-child { border-bottom: none; }

.tuning-stat > span { color: var(--muted); }
.tuning-stat strong { font-variant-numeric: tabular-nums; }

.tuning-vals {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.delta {
  font-size: 0.75rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  padding: 0.05rem 0.3rem;
  border-radius: 3px;
}

.delta-good { color: var(--top); background: var(--top-tint-badge); }
.delta-bad { color: var(--low); background: var(--low-tint-badge); }
.delta-neutral { color: var(--muted); background: var(--muted-tint); }

.card-dimmed { opacity: 0.6; }

/* ── Autotune ── */
.btn-autotune {
  background: none;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 4px;
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.btn-autotune:hover { background: var(--accent); color: var(--contrast); }

.btn-reset-manual {
  background: none;
  border: 1px solid var(--low);
  color: var(--low);
  border-radius: 4px;
  padding: 0.45rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.btn-reset-manual:hover { background: var(--low); color: var(--contrast-inv); }

/* Modal overlay */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 520px;
  width: 90%;
}

.modal-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.75rem;
  color: var(--text);
  text-transform: none;
  letter-spacing: 0;
}

.modal-card p {
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
  line-height: 1.5;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1rem;
}

.autotune-grid-preview {
  background: var(--bg);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  margin-bottom: 0.6rem;
  line-height: 1.6;
}

.autotune-estimate {
  border-left: 3px solid var(--accent);
  padding-left: 0.75rem;
}

/* Progress bar */
.autotune-progress { margin-bottom: 1rem; }

.progress-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.4rem;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s;
}

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

/* Autotune results table */
.autotune-table {
  width: 100%;
  font-size: 0.8rem;
}

.autotune-table th {
  background: var(--bg);
  font-size: 0.75rem;
  position: static;
}

.at-sortable { cursor: pointer; }
.at-sortable:hover { color: var(--accent); }

.at-best td { background: var(--top-tint-soft); }

.at-best-summary {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--top);
  font-weight: 600;
}

.btn-apply-at {
  background: none;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 3px;
  padding: 0.15rem 0.4rem;
  cursor: pointer;
  font-size: 0.7rem;
  font-weight: 600;
  white-space: nowrap;
}

.btn-apply-at:hover { background: var(--accent); color: var(--contrast); }

/* ── Changelog ── */
.log-list {
  max-height: 400px;
  overflow-y: auto;
}

.log-entry {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  flex-wrap: wrap;
}

.log-entry:last-child { border-bottom: none; }

.log-time {
  color: var(--muted);
  font-size: 0.75rem;
  white-space: nowrap;
  flex-shrink: 0;
}

.log-badge {
  font-size: 0.65rem;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-weight: 600;
  text-transform: uppercase;
  flex-shrink: 0;
}

.log-badge-solve { background: var(--accent); color: var(--contrast); }
.log-badge-manual { background: var(--mid); color: var(--contrast); }

.log-detail {
  flex: 1;
  min-width: 0;
}

.log-tier {
  color: var(--muted);
  font-size: 0.75rem;
  margin-left: 0.3rem;
}

.log-note {
  display: block;
  color: var(--muted);
  font-style: italic;
  font-size: 0.75rem;
}

.btn-clear-log {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 3px;
  padding: 0.15rem 0.4rem;
  cursor: pointer;
  font-size: 0.7rem;
  text-transform: uppercase;
}

.btn-clear-log:hover { color: var(--text); border-color: var(--muted); }

/* ── Coverage ── */
.gap-item {
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.gap-item .gap-label { color: var(--low); font-weight: 600; }
.gap-link { cursor: pointer; }
.gap-link:hover { color: var(--accent); }
.coverage-ok { color: var(--top); font-weight: 600; }

/* ── Course cards ── */
.course-card h3 {
  font-size: 1rem;
  color: var(--text);
  text-transform: none;
  letter-spacing: 0;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.course-meta {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.course-gap {
  border-left: 3px solid var(--low);
}

.course-tier-bar {
  height: 20px;
  margin-bottom: 0.5rem;
}

.course-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

@media (max-width: 900px) {
  .course-detail { grid-template-columns: 1fr; }
}

.course-section h4 {
  font-size: 0.8rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-bottom: 0.3rem;
}

.course-assigned-table,
.course-willing-table {
  font-size: 0.8rem;
}

.course-assigned-table th,
.course-willing-table th {
  font-size: 0.75rem;
  background: var(--bg);
}

.course-assigned-table tr.has-tooltip,
.course-willing-table tr.has-tooltip {
  cursor: help;
}

/* ── Scoring section ── */
.scoring-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

@media (max-width: 700px) {
  .scoring-grid { grid-template-columns: 1fr; }
}

.tier-viz {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0;
  font-size: 0.85rem;
}

.tier-dot {
  width: 12px;
  height: 12px;
  border-radius: 2px;
  flex-shrink: 0;
}

.tier-score {
  font-weight: 600;
  width: 40px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ── Formulation ── */
#formulation-content {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  line-height: 1.7;
}

/* ── Formulation layout with sidebar TOC ── */
.formulation-layout {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.formulation-toc {
  width: 44px;
  min-width: 44px;
  flex-shrink: 0;
  position: sticky;
  top: 1rem;
  transition: width 0.2s ease;
  overflow: hidden;
}

.formulation-toc.toc-open {
  width: 240px;
  min-width: 240px;
}

.toc-toggle {
  display: block;
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  padding: 0.4rem 0.6rem;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}

.toc-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.toc-open .toc-toggle::after { content: ""; }
.formulation-toc:not(.toc-open) .toc-toggle {
  writing-mode: vertical-lr;
  text-align: center;
  padding: 0.6rem 0.4rem;
  font-size: 0.75rem;
  letter-spacing: 0.5px;
}

.toc-list {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  display: none;
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
}

.toc-open .toc-list {
  display: block;
}

.toc-list li {
  padding: 0.2rem 0;
  font-size: 0.8rem;
  line-height: 1.4;
}

.toc-list li.toc-level-2 { padding-left: 0.75rem; }
.toc-list li.toc-level-3 { padding-left: 1.5rem; font-size: 0.75rem; }
.toc-list li.toc-level-4 { padding-left: 2.25rem; font-size: 0.72rem; }

.toc-list a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.1s;
}

.toc-list a:hover {
  color: var(--accent);
}

@media (max-width: 900px) {
  .formulation-layout { flex-direction: column; }
  .formulation-toc, .formulation-toc.toc-open {
    width: 100%;
    min-width: 100%;
    position: static;
  }
  .formulation-toc:not(.toc-open) .toc-toggle {
    writing-mode: horizontal-tb;
  }
}

#formulation-content h1 { font-size: 1.4rem; margin: 1.5rem 0 0.5rem; }
#formulation-content h2 { font-size: 1.2rem; margin: 1.5rem 0 0.5rem; border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }
#formulation-content h3 { font-size: 1.05rem; margin: 1.2rem 0 0.4rem; }
#formulation-content h4 { font-size: 0.95rem; margin: 1rem 0 0.3rem; }
#formulation-content p { margin-bottom: 0.8rem; }
#formulation-content code { background: var(--bg); padding: 0.15rem 0.3rem; border-radius: 3px; font-size: 0.85em; }
#formulation-content pre { background: var(--bg); padding: 1rem; border-radius: 4px; overflow-x: auto; margin-bottom: 1rem; }
#formulation-content pre code { padding: 0; }
#formulation-content table { margin-bottom: 1rem; }
#formulation-content ul, #formulation-content ol { margin: 0 0 1rem 1.5rem; }
#formulation-content blockquote { border-left: 3px solid var(--border); padding-left: 1rem; color: var(--muted); }
#formulation-content a { color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color 0.15s; }
#formulation-content a:hover { border-bottom-color: var(--accent); }

/* ── Loading spinner ── */
.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  color: var(--muted);
  font-size: 0.9rem;
  gap: 0.5rem;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ── Row count ── */
.row-count {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

/* ── Export button ── */
.btn-export {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 4px;
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.1s, border-color 0.1s;
}

.btn-export:hover { color: var(--accent); border-color: var(--accent); }

/* ── Collapsible cards ── */
.card-collapsible > h3 {
  cursor: pointer;
  user-select: none;
}

.card-collapsible > h3::before {
  content: "▾";
  display: inline-block;
  width: 1rem;
  transition: transform 0.15s;
  font-size: 0.7rem;
  vertical-align: middle;
}

.card-collapsible.collapsed > h3::before {
  transform: rotate(-90deg);
}

.card-collapsible.collapsed > :not(h3):not(.meta) {
  display: none;
}

/* ── Highlight flash ── */
@keyframes highlight-flash {
  0% { box-shadow: 0 0 0 2px var(--accent); }
  100% { box-shadow: 0 0 0 2px transparent; }
}

.highlight-flash {
  animation: highlight-flash 1.5s ease-out;
}

/* ── Score histogram ── */
.histogram-wrapper {
  position: relative;
  height: 80px;
}
.histogram {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 100%;
}

.histogram-bar {
  flex: 1;
  min-width: 0;
  border-radius: 2px 2px 0 0;
  transition: height 0.3s;
  position: relative;
}

.histogram-bar:hover { opacity: 0.8; }
.histogram-bar.clickable { cursor: pointer; }

.histogram-labels {
  display: flex;
  gap: 2px;
  font-size: 0.65rem;
  color: var(--muted);
  margin-top: 2px;
}

.histogram-labels span {
  flex: 1;
  text-align: center;
  min-width: 0;
}

/* ── Time Slot Demand Chart ── */
.demand-chart-wrapper { overflow-x: auto; }
.demand-chart {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 140px;
  position: relative;
  padding-bottom: 2rem;
}
.demand-bar-col {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  cursor: default;
}
.demand-bar {
  width: 100%;
  min-height: 2px;
  border-radius: 2px 2px 0 0;
  transition: height 0.3s;
}
.demand-bar-col:hover .demand-bar { opacity: 0.8; }
.demand-label {
  font-size: 0.5rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  text-align: center;
  margin-top: 2px;
  transform: rotate(-45deg);
  transform-origin: top center;
  position: absolute;
  bottom: 0;
}
.demand-cap-line {
  position: absolute;
  left: 0;
  right: 0;
  border-top: 2px dashed var(--low);
  pointer-events: none;
  z-index: 1;
}
.demand-cap-label {
  position: absolute;
  right: 0;
  top: -14px;
  font-size: 0.6rem;
  color: var(--low);
  font-weight: 600;
}

/* ── Room Utilization ── */
.room-util-summary {
  display: flex;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}
.room-stat {
  font-size: 0.85rem;
  color: var(--text);
}
.room-stat strong { color: var(--accent); }
.room-stat-warn { color: var(--low); font-weight: 600; }
.room-util-bars { display: flex; flex-direction: column; gap: 3px; }
.room-util-bars .bar-row { font-size: 0.8rem; }
.room-util-bars .bar-name { min-width: 90px; font-size: 0.75rem; }
.room-util-bars .bar-val { min-width: 20px; text-align: right; font-size: 0.75rem; color: var(--muted); }

/* ── Prep Distribution Chart ── */
.prep-chart {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 120px;
}
.prep-bar-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  cursor: default;
}
.prep-bar {
  width: 70%;
  min-height: 2px;
  border-radius: 3px 3px 0 0;
  transition: height 0.3s;
}
.prep-bar-col:hover .prep-bar { opacity: 0.8; }
.prep-bar-val {
  font-size: 0.7rem;
  color: var(--muted);
  margin-bottom: 2px;
}
.prep-bar-label {
  font-size: 0.75rem;
  color: var(--text);
  font-weight: 600;
  margin-top: 4px;
}
.prep-chart-axis {
  text-align: center;
  font-size: 0.65rem;
  color: var(--muted);
  margin-top: 0.3rem;
}

/* ── Instructor Profile (combined tier + satisfaction) ── */
.profile-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 1px 0;
}
.profile-row .bar-name { min-width: 100px; font-size: 0.75rem; }
.profile-row .bar-track { flex: 1; }
.profile-row .bar-value { min-width: 24px; }

/* Unified segmented bar fill */
.bar-fill-segmented {
  display: flex;
  background: none;
}
.bar-fill-segment {
  display: block;
  height: 100%;
}
.tier-seg-top { background: var(--top); }
.tier-seg-mid { background: var(--mid); }
.tier-seg-low { background: var(--low); }
.tier-seg-willing { background: var(--willing); }

/* Clickable dashboard elements */
.clickable, .clickable.demand-bar-col, .clickable.prep-bar-col { cursor: pointer; }
.clickable:hover { opacity: 0.85; }

/* Gini qualitative label */
.gini-label {
  display: inline-block;
  font-size: 0.6rem;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: 3px;
  vertical-align: middle;
  margin-left: 0.3rem;
}
.gini-fair { background: var(--top-tint); color: var(--top); }
.gini-moderate { background: var(--mid-tint); color: var(--mid); }
.gini-unequal { background: var(--low-tint); color: var(--low); }

/* External rooms coloring */
.ext-warn { color: var(--low) !important; }
.ext-ok { color: var(--top) !important; }

/* Coverage gap pills */
.coverage-gaps {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 0.5rem;
}
.coverage-gap-pill {
  display: inline-block;
  font-size: 0.7rem;
  padding: 1px 6px;
  border-radius: 3px;
  background: var(--low-tint);
  color: var(--low);
  cursor: pointer;
  font-weight: 600;
}
.coverage-gap-pill:hover { background: var(--low-tint-strong); }
.coverage-gap-more {
  display: inline-block;
  font-size: 0.7rem;
  padding: 1px 6px;
  color: var(--muted);
  cursor: pointer;
}
.coverage-gap-more:hover { color: var(--text); }

/* Histogram mean line */
.histogram-wrapper {
  position: relative;
}
.mean-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 0;
  border-left: 2px dashed var(--text);
  opacity: 0.6;
  pointer-events: none;
  z-index: 2;
}
.mean-label {
  position: absolute;
  top: -2px;
  left: 4px;
  font-size: 0.6rem;
  color: var(--text);
  white-space: nowrap;
  font-weight: 600;
}

/* ── Keyboard shortcut hints ── */
.kbd {
  display: inline-block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0 0.3rem;
  font-size: 0.7rem;
  font-family: monospace;
  color: var(--muted);
  margin-left: 0.3rem;
  vertical-align: middle;
}

/* ── Preset buttons ── */
.preset-group {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

.btn-preset {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--muted);
  border-radius: 4px;
  padding: 0.3rem 0.6rem;
  font-size: 0.75rem;
  cursor: pointer;
  transition: color 0.1s, border-color 0.1s;
}

.btn-preset:hover { color: var(--accent); border-color: var(--accent); }

/* ── Assignments table scroll context for sticky headers ── */
#assignments {
  max-height: calc(100vh - 8rem);
  overflow-y: auto;
  position: relative;
}

#assignments .controls {
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
  padding-top: 0.25rem;
  padding-bottom: 0.25rem;
}

#assignments .row-count {
  position: sticky;
  top: 2.5rem;
  background: var(--bg);
  z-index: 9;
}

#assignments-table thead th {
  top: 4rem;
  z-index: 8;
}

/* ── Editor bar ── */
.editor-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.3rem;
  font-size: 0.8rem;
}

.editor-bar label {
  color: var(--muted);
  font-weight: 500;
}

.editor-input {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  width: 160px;
}

/* ── Reason code badges ── */
.reason-badge {
  display: inline-block;
  font-size: 0.6rem;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.reason-instructor_request { background: var(--accent-tint-badge); color: var(--accent); }
.reason-load_balance { background: var(--mid-tint); color: var(--mid); }
.reason-coverage_gap { background: var(--low-tint); color: var(--low); }
.reason-time_conflict { background: var(--muted-tint-soft); color: var(--muted); }
.reason-coordinator_preference { background: var(--top-tint); color: var(--top); }
.reason-other { background: var(--muted-tint); color: var(--muted); }

/* ── Validation messages ── */
.validation-errors {
  background: var(--low-tint-bg);
  border: 1px solid var(--low-tint-border);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
}

.validation-errors li { color: var(--low); margin-left: 1rem; }

.validation-warnings {
  background: var(--mid-tint-soft);
  border: 1px solid var(--mid-tint-border);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
}

.validation-warnings li { color: var(--mid); margin-left: 1rem; }

/* ── Preview stats diff ── */
.preview-stats {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
  font-size: 0.8rem;
}

.preview-stat {
  display: flex;
  justify-content: space-between;
  padding: 0.15rem 0;
}

.preview-stat .label { color: var(--muted); }

/* ── Force confirm dialog ── */
.force-confirm {
  background: var(--mid-tint-soft);
  border: 1px solid var(--mid-tint-border);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin-top: 0.5rem;
}

.force-confirm h4 {
  color: var(--mid);
  font-size: 0.85rem;
  margin-bottom: 0.4rem;
}

.force-confirm .btn-force {
  background: var(--mid);
  color: var(--contrast);
  border: none;
  border-radius: 3px;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  margin-top: 0.4rem;
}

/* ── Add section form ── */
.add-section-form {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin-top: 0.5rem;
}

.add-section-form .form-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.4rem;
  flex-wrap: wrap;
}

.add-section-form label {
  font-size: 0.8rem;
  color: var(--muted);
  min-width: 60px;
}

.add-section-form select,
.add-section-form input {
  font-size: 0.8rem;
  padding: 0.25rem 0.4rem;
}

.btn-add-section {
  background: var(--top);
  color: var(--contrast);
  border: none;
  border-radius: 3px;
  padding: 0.3rem 0.7rem;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
}

.btn-add-section:hover { opacity: 0.85; }

/* ── Swap UI ── */
.swap-section {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
}

.swap-section h4 {
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 0.3rem;
}

.swap-select {
  width: 100%;
  max-width: 300px;
  font-size: 0.8rem;
}

.btn-swap {
  background: none;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 3px;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
}

.btn-swap:hover { background: var(--accent); color: var(--contrast); }

/* ── Time change ── */
.time-change-section {
  margin-top: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.time-change-section label {
  font-size: 0.8rem;
  color: var(--muted);
}

.btn-time-change {
  background: none;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 3px;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  font-size: 0.8rem;
}

.btn-time-change:hover { background: var(--accent-tint); }

/* ── Changelog before/after expand ── */
.log-before-after {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 0.2rem;
  cursor: pointer;
}

.log-before-after summary {
  font-size: 0.7rem;
  color: var(--muted);
  cursor: pointer;
}

.log-before-after .ba-row {
  display: flex;
  gap: 0.5rem;
  padding: 0.1rem 0;
}

.log-before-after .ba-label {
  font-weight: 600;
  min-width: 40px;
}

.log-editor {
  color: var(--muted);
  font-size: 0.7rem;
  font-style: italic;
}

/* ── Log badge types ── */
.log-badge-add { background: var(--top); color: var(--contrast); }
.log-badge-swap { background: var(--accent); color: var(--contrast); }
.log-badge-time { background: var(--muted-tint-badge); color: var(--text); }
.log-badge-undo { background: var(--border); color: var(--text); }
.log-badge-cascade { background: var(--mid-tint-strong); color: var(--text); }
.log-badge-autotune { background: var(--accent-tint-badge2); color: var(--accent); }
.log-badge-bulk { background: var(--mid-tint-badge); color: var(--mid); }

/* ── Tri-state assign/decline buttons ── */
.tri-toggle-wrap {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  vertical-align: middle;
  margin-right: 0.35rem;
}

.tri-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 18px;
  font-size: 0.65rem;
  border: 1px solid var(--border);
  background: none;
  color: var(--muted);
  border-radius: 4px;
  cursor: pointer;
  padding: 0;
  line-height: 1;
  transition: all 0.15s;
}

.tri-btn:hover {
  background: var(--accent-tint-subtle);
}

.tri-btn-assign.active {
  background: var(--top-tint);
  color: var(--top);
  border-color: var(--top);
}

.tri-btn-assign:hover {
  background: var(--top-tint-soft);
}

.tri-btn-decline.active {
  background: var(--low-tint);
  color: var(--low);
  border-color: var(--low);
}

.tri-btn-decline:hover {
  background: var(--low-tint-bg);
}

/* Row styling when declined */
.row-declined td, .row-declined {
  opacity: 0.4;
  text-decoration: line-through;
  text-decoration-color: var(--low);
}

/* ── Inline load editor ── */
.load-edit-wrap {
  display: inline-flex;
  align-items: center;
  gap: 0;
  vertical-align: middle;
}

.load-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  width: 18px;
  height: 18px;
  font-size: 0.75rem;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: color 0.1s, border-color 0.1s;
}

.load-dec { border-radius: 3px 0 0 3px; }
.load-inc { border-radius: 0 3px 3px 0; }
.load-btn:hover { color: var(--accent); border-color: var(--accent); }

.load-value {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 18px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  font-size: 0.8rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  padding: 0 2px;
}

.swap-action-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.6rem;
  margin-bottom: 0.4rem;
  background: var(--accent-tint-weak);
  border: 1px solid var(--accent-tint-border);
  border-radius: 4px;
  flex-wrap: wrap;
}

/* ── Cascade Notification ── */

.cascade-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 300;
  backdrop-filter: blur(2px);
}

.cascade-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  max-width: 600px;
  width: 92%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 12px 40px var(--shadow-heavy);
}

.cascade-header {
  margin-bottom: 1.25rem;
}

.cascade-box h3 {
  color: var(--text);
  font-size: 1.15rem;
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cascade-count {
  background: var(--accent);
  color: var(--contrast);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
}

.cascade-trigger {
  color: var(--muted);
  font-size: 0.85rem;
}

.cascade-section {
  margin-bottom: 1rem;
}

.cascade-section-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding-bottom: 0.4rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.cascade-section-remove { color: var(--low); }
.cascade-section-add { color: var(--top); }

.cascade-item {
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  margin-bottom: 0.4rem;
}

.cascade-item.cascade-remove {
  background: var(--low-tint-bg);
  border-left: 3px solid var(--low);
}

.cascade-item.cascade-add {
  background: var(--top-tint-bg);
  border-left: 3px solid var(--top);
}

.cascade-item-main {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  font-size: 0.95rem;
  line-height: 1.5;
}

.cascade-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  flex-shrink: 0;
}

.cascade-badge-remove {
  background: var(--low-tint-strong);
  color: var(--low);
}

.cascade-badge-add {
  background: var(--top-tint-strong);
  color: var(--top);
}

.cascade-badge-gap {
  background: #5c3d00;
  color: #ffb347;
}

.cascade-section-gap {
  border-left-color: #ffb347;
  color: #ffb347;
}

.cascade-gap {
  border-left: 3px solid #ffb347;
}

.cascade-gap-detail {
  color: #ffb347;
  font-size: 0.85rem;
  margin-left: 0.3rem;
}

.cascade-who {
  font-weight: 600;
  color: var(--text);
}

.cascade-arrow {
  color: var(--muted);
  font-size: 0.85rem;
}

.cascade-what {
  color: var(--text);
}

.cascade-sec {
  color: var(--muted);
}

.cascade-why {
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 0.25rem;
  padding-left: 0.2rem;
  line-height: 1.4;
}

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

/* ── Toast notifications ── */
#toast-container {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  z-index: 400;
  display: flex;
  flex-direction: column-reverse;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 0.6rem 1rem;
  font-size: 0.82rem;
  color: var(--text);
  max-width: 360px;
  box-shadow: 0 4px 16px var(--shadow);
  pointer-events: auto;
  animation: toast-in 0.3s ease-out, toast-out 0.3s ease-in 3.7s forwards;
  cursor: pointer;
  line-height: 1.4;
}

.toast-header {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.15rem;
}

.toast-badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
}

.toast-badge-reassign { background: var(--mid); color: var(--contrast); }
.toast-badge-unassign { background: var(--low); color: var(--contrast-inv); }
.toast-badge-add { background: var(--top); color: var(--contrast); }
.toast-badge-swap { background: var(--accent); color: var(--contrast); }
.toast-badge-time { background: var(--muted-tint-badge); color: var(--text); }
.toast-badge-load { background: var(--mid); color: var(--contrast); }
.toast-badge-decline { background: var(--low); color: var(--contrast-inv); }

.toast-label {
  font-size: 0.7rem;
  color: var(--muted);
}

.toast-body {
  font-size: 0.8rem;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

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

/* ── Schedule View ── */

.schedule-view-toggle {
  display: inline-flex;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.btn-toggle {
  padding: 0.4rem 1rem;
  background: var(--surface);
  color: var(--muted);
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  transition: background 0.15s, color 0.15s;
}
.btn-toggle:not(:last-child) { border-right: 1px solid var(--border); }
.btn-toggle.active {
  background: var(--accent-tint);
  color: var(--accent);
  font-weight: 600;
}
.btn-toggle:hover:not(.active) { background: var(--accent-tint-subtle); }

/* Room grid */
.schedule-scroll-wrapper {
  overflow-x: auto;
  margin-top: 0.5rem;
}

/* ── External rooms summary panel ── */
.external-rooms-panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--warn);
  border-radius: 6px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
}
.external-rooms-panel h3 {
  color: var(--warn);
  margin-bottom: 0.5rem;
  font-size: 1rem;
}
.external-rooms-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-top: 0.5rem;
}
.external-rooms-table th {
  text-align: left;
  padding: 0.35rem 0.5rem;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.external-rooms-table td {
  padding: 0.35rem 0.5rem;
  border-bottom: 1px solid var(--border);
}
.external-rooms-table tr:last-child td {
  border-bottom: none;
}

.schedule-grid-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  font-size: 0.8rem;
}

.schedule-grid-table th,
.schedule-grid-table td {
  border: 1px solid var(--border);
  padding: 0;
}

.sched-room-header {
  text-align: center;
  padding: 0.5rem 0.3rem !important;
  background: var(--surface);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.75rem;
  position: sticky;
  top: 0;
  z-index: 2;
  white-space: nowrap;
}

.sched-time-header {
  text-align: left;
  padding: 0.5rem !important;
  background: var(--surface);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.75rem;
  position: sticky;
  top: 0;
  left: 0;
  z-index: 3;
  min-width: 140px;
}

.sched-time-label {
  padding: 0.35rem 0.5rem !important;
  background: var(--surface);
  color: var(--text);
  font-size: 0.75rem;
  white-space: nowrap;
  position: sticky;
  left: 0;
  z-index: 1;
  min-width: 140px;
}

.prime-row .sched-time-label { background: var(--accent-tint-subtle); }

.prime-badge {
  display: inline-block;
  margin-left: 0.3rem;
  color: var(--accent);
  font-size: 0.65rem;
}

.sched-cell {
  padding: 0.25rem 0.35rem !important;
  cursor: pointer;
  border-left: 3px solid transparent !important;
  transition: opacity 0.15s, background 0.15s;
  min-height: 2rem;
}
.sched-cell.tier-top { border-left-color: var(--top) !important; background: var(--top-tint-soft); }
.sched-cell.tier-mid { border-left-color: var(--mid) !important; background: var(--mid-tint-soft); }
.sched-cell.tier-low { border-left-color: var(--low) !important; background: var(--low-tint); }
.sched-cell.tier-willing { border-left-color: var(--willing) !important; background: var(--muted-tint); }

.sched-cell:hover { filter: brightness(1.2); }

.sched-course {
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--text);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.sched-instructor {
  font-size: 0.7rem;
  color: var(--muted);
  line-height: 1.1;
}

.empty-slot {
  background: var(--bg);
}

.sched-dimmed { opacity: 0.2; }
.sched-highlight { outline: 2px solid var(--accent); outline-offset: -2px; z-index: 1; position: relative; }
.sched-fade { opacity: 0.25; }

/* Weekly calendar */
.weekly-grid {
  display: grid;
  grid-template-columns: 50px repeat(5, 1fr);
  gap: 0;
  margin-top: 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.weekly-header-label {
  text-align: center;
  padding: 0.5rem 0.2rem;
  background: var(--surface);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

.weekly-time-gutter {
  border-right: 1px solid var(--border);
}

.weekly-time-gutter .weekly-header-label {
  font-size: 0.7rem;
}

.weekly-gutter-body {
  position: relative;
  height: 800px;
  background: var(--surface);
}

.weekly-gutter-label {
  position: absolute;
  right: 6px;
  transform: translateY(-50%);
  font-size: 0.65rem;
  color: var(--muted);
  white-space: nowrap;
}

.weekly-day-col {
  border-right: 1px solid var(--border);
  min-width: 0;
}
.weekly-day-col:last-child { border-right: none; }

.weekly-day-body {
  position: relative;
  height: 800px;
  background: var(--bg);
}

.weekly-hour-line {
  position: absolute;
  left: 0;
  right: 0;
  border-top: 1px solid var(--border);
  pointer-events: none;
}
.weekly-hour-line .weekly-hour-label { display: none; }

.weekly-block {
  position: absolute;
  border-radius: 3px;
  padding: 2px 4px;
  cursor: pointer;
  overflow: hidden;
  border-left: 3px solid transparent;
  font-size: 0.7rem;
  line-height: 1.15;
  transition: opacity 0.15s;
  z-index: 1;
}
.weekly-block.tier-top { border-left-color: var(--top); background: var(--top-tint-soft); }
.weekly-block.tier-mid { border-left-color: var(--mid); background: var(--mid-tint-soft); }
.weekly-block.tier-low { border-left-color: var(--low); background: var(--low-tint); }
.weekly-block.tier-willing { border-left-color: var(--willing); background: var(--muted-tint); }

.weekly-block.weekly-block-density {
  border-left-color: var(--accent);
  background: rgba(245, 102, 0, var(--density-alpha, 0.15));
}

.weekly-block:hover { filter: brightness(1.2); z-index: 2; }

.weekly-block-or {
  border-style: dashed !important;
}

.weekly-block-count {
  font-weight: 800;
  font-size: 1rem;
  display: block;
  color: var(--text);
  line-height: 1;
}
.weekly-block-label {
  display: block;
  color: var(--muted);
  font-size: 0.6rem;
  line-height: 1;
}

.weekly-block-course {
  font-weight: 700;
  display: block;
  color: var(--text);
}
.weekly-block-inst {
  display: block;
  color: var(--muted);
  font-size: 0.65rem;
}

.weekly-block-active {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  z-index: 3 !important;
  filter: brightness(1.2);
}

/* Weekly detail popup */
.weekly-popup-overlay {
  position: fixed;
  inset: 0;
  z-index: 99;
}

.weekly-detail-popup {
  position: fixed;
  z-index: 100;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 32px var(--shadow-heavy), 0 0 0 1px var(--border);
  max-height: 60vh;
  overflow-y: auto;
  animation: popup-in 0.12s ease-out;
}

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

.weekly-detail-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1rem;
  background: var(--accent-tint-subtle);
  border-bottom: 1px solid var(--border);
  font-weight: 600;
  font-size: 0.9rem;
}

.weekly-detail-count {
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 400;
}

.weekly-detail-close {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1.2rem;
  padding: 0 0.3rem;
  line-height: 1;
}
.weekly-detail-close:hover { color: var(--text); }

.weekly-detail-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}
.weekly-detail-table th {
  text-align: left;
  padding: 0.4rem 0.7rem;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--border);
}
.weekly-detail-table td {
  padding: 0.4rem 0.7rem;
  border-bottom: 1px solid var(--border);
}
.weekly-detail-row {
  cursor: pointer;
  transition: background 0.1s;
}
.weekly-detail-row:hover { background: var(--accent-tint-subtle); }

.or-badge {
  position: absolute;
  top: 1px;
  right: 3px;
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-tint-badge);
  border-radius: 50%;
  width: 13px;
  height: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 900px) {
  .schedule-scroll-wrapper { max-width: 100%; }
  .weekly-grid { grid-template-columns: 40px repeat(5, 1fr); }
}

/* ── Help Icons ── */
.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--muted-tint-soft);
  color: var(--muted);
  font-size: 0.6rem;
  font-weight: 700;
  cursor: help;
  vertical-align: middle;
  margin-left: 0.2rem;
  flex-shrink: 0;
}

.help-icon:hover {
  background: var(--accent-tint);
  color: var(--accent);
}

/* ── Gini Range Bar ── */
.range-bar {
  position: relative;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  margin-top: 0.4rem;
  overflow: visible;
}

.range-fill {
  position: absolute;
  inset: 0;
  border-radius: 3px;
  background: linear-gradient(to right, var(--top), var(--mid) 50%, var(--low));
  opacity: 0.5;
}

.range-marker {
  position: absolute;
  top: -3px;
  width: 4px;
  height: 12px;
  background: var(--text);
  border-radius: 2px;
  transform: translateX(-50%);
  box-shadow: 0 0 4px var(--shadow);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.55rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

/* ── Benchmark Notes ── */
.benchmark-note {
  font-size: 0.65rem;
  color: var(--muted);
  margin-top: 0.15rem;
  opacity: 0.8;
}

.benchmark-scale {
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.25rem;
  letter-spacing: 0.02em;
}
.bench-good  { color: var(--top); font-weight: 600; }
.bench-ok    { color: var(--mid); font-weight: 600; }
.bench-poor  { color: var(--low); font-weight: 600; }

/* ── Score Legend ── */
#score-legend {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.4rem 0.75rem;
  font-size: 0.75rem;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  margin-bottom: 0.5rem;
}

.legend-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 0.25rem;
}

/* ── How the Optimizer Works ── */
.mechanics-details {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.mechanics-details summary {
  padding: 0.6rem 1rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--muted);
  font-size: 0.85rem;
  list-style: none;
}

.mechanics-details summary::before {
  content: '▸ ';
}

.mechanics-details[open] summary::before {
  content: '▾ ';
}

.mechanics-content {
  padding: 0.5rem 1rem 1rem;
}

.mechanics-item {
  padding: 0.4rem 0;
  font-size: 0.8rem;
  color: var(--text);
  line-height: 1.5;
  border-bottom: 1px solid var(--border);
}

.mechanics-item:last-child {
  border-bottom: none;
}

.mechanics-item strong {
  color: var(--accent);
}

/* ── Why This Assignment ── */
.why-details {
  margin-bottom: 0.5rem;
}

.why-details summary {
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 600;
}

.why-section {
  padding: 0.4rem 0.5rem;
  margin-top: 0.3rem;
}

.why-factor {
  font-size: 0.78rem;
  padding: 0.15rem 0;
  color: var(--text);
}

.why-bonus {
  color: var(--top);
}

.why-penalty {
  color: var(--low);
}

/* ── Edit Context Bar ── */
.edit-context {
  display: flex;
  gap: 1rem;
  padding: 0.4rem 0.6rem;
  margin-bottom: 0.5rem;
  background: var(--accent-tint-subtle);
  border-radius: var(--radius);
  font-size: 0.78rem;
}

.edit-context-item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.edit-context-ok { color: var(--top); }
.edit-context-warn { color: var(--mid); }
.edit-context-error { color: var(--low); }

/* ── Delta Column ── */
.delta-pos { color: var(--top) !important; }
.delta-neg { color: var(--low) !important; }

/* ── Candidate Warnings ── */
.candidate-warn {
  font-size: 0.85rem;
  margin-right: 0.25rem;
  cursor: help;
}

/* ── Cascade Explanation ── */
.cascade-explain {
  font-size: 0.8rem;
  color: var(--muted);
  padding: 0 1rem 0.5rem;
  line-height: 1.5;
}
.cascade-impact {
  padding: 0.5rem 1rem;
  margin: 0 1rem 0.5rem;
  background: var(--surface);
  border-radius: 4px;
  font-size: 0.85rem;
  border: 1px solid var(--border);
}
.cascade-global-impact {
  padding: 0.6rem 1rem;
  margin: 0 1rem 0.5rem;
  background: var(--surface);
  border-radius: 4px;
  font-size: 0.9rem;
  border: 1px solid var(--border);
}
.cascade-global-before, .cascade-global-after { font-weight: 600; }
.cascade-arrow-small { color: var(--muted); margin: 0 0.25rem; }
.cascade-impact-table {
  margin: 0.5rem 1rem;
  font-size: 0.8rem;
  border-collapse: collapse;
  width: calc(100% - 2rem);
}
.cascade-impact-table th {
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--muted);
  text-align: left;
  padding: 0.25rem 0.5rem;
  border-bottom: 1px solid var(--border);
}
.cascade-impact-table td {
  padding: 0.25rem 0.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.cascade-impact-label { color: var(--muted); }
.cascade-impact-lost { color: var(--low); font-weight: 600; }
.cascade-impact-gained { color: var(--top); font-weight: 600; }
.cascade-score {
  font-size: 0.75rem;
  color: var(--muted);
  margin-left: 0.5rem;
}
.cascade-sec-changes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 0.5rem;
  font-size: 0.75rem;
}
.cascade-sec-lost {
  color: var(--low);
  font-weight: 600;
}
.cascade-sec-gained {
  color: var(--top);
  font-weight: 600;
}
.cascade-trigger-edit {
  margin: 0.5rem 0;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: rgba(255,255,255,0.03);
}
.cascade-section-trigger {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
}

.impact-popup {
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  max-width: 550px;
  width: 92%;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px var(--border);
}

.impact-summary-bar {
  display: flex;
  gap: 0.75rem;
  margin: 0.5rem 0;
  font-size: 0.85rem;
  font-weight: 600;
}
.impact-count-up { color: var(--top); }
.impact-count-down { color: var(--low); }
.impact-count-same { color: var(--muted); }

.impact-table-compact td, .impact-table-compact th {
  padding: 0.2rem 0.5rem;
  font-size: 0.8rem;
}

.impact-expand-btn {
  background: var(--border);
  border: none;
  color: var(--muted);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.8rem;
  width: 100%;
}
.impact-expand-btn:hover {
  background: var(--accent);
  color: var(--bg);
}

/* ── Glossary Modal ── */
#glossary-modal {
  z-index: 201;
}

#glossary-modal .modal-card {
  max-width: 680px;
  max-height: 82vh;
  overflow-y: auto;
  padding: 1.5rem 2rem;
}

#glossary-modal .modal-card h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent);
}

.glossary-category {
  margin-bottom: 1.25rem;
}

.glossary-cat-heading {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin: 0 0 0.5rem 0;
  padding: 0.35rem 0.6rem;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius);
  border-left: 3px solid var(--accent);
}

.glossary-items {
  display: grid;
  gap: 0.35rem;
  padding-left: 0.25rem;
}

.glossary-item {
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: 0.75rem;
  padding: 0.4rem 0.5rem;
  border-radius: 4px;
  font-size: 0.8rem;
  line-height: 1.45;
  transition: background 0.15s;
}

.glossary-item:hover {
  background: rgba(255, 255, 255, 0.04);
}

.glossary-term {
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.glossary-desc {
  color: var(--muted);
}

/* Alternate row shading */
.glossary-item:nth-child(even) {
  background: rgba(255, 255, 255, 0.015);
}

.glossary-item:nth-child(even):hover {
  background: rgba(255, 255, 255, 0.05);
}