:root {
  --ink-900: #12203A;
  --ink-800: #182C4C;
  --ink-700: #223A60;
  --parchment: #F2ECDA;
  --parchment-dim: #E7DFC7;
  --brass: #C79A3D;
  --brass-dim: #9C7A2E;
  --crimson: #92312F;
  --ink-text: #1E2A1F;
  --paper-text: #241F17;
  --cream-text: #EDE6D3;
  --border-soft: rgba(199, 154, 61, 0.35);
  --shadow: 0 12px 32px rgba(10, 16, 30, 0.35);
  --radius: 4px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: var(--ink-900);
  background-image:
    radial-gradient(circle at 15% 10%, rgba(199,154,61,0.06), transparent 40%),
    radial-gradient(circle at 85% 90%, rgba(199,154,61,0.05), transparent 45%);
  color: var(--cream-text);
  min-height: 100vh;
}

h1, h2, h3 { font-family: 'Fraunces', serif; margin: 0; }

/* ---------- Letterhead ---------- */
.letterhead {
  border-bottom: 1px solid var(--border-soft);
  background: linear-gradient(180deg, var(--ink-800), var(--ink-900));
}
.letterhead-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 22px 32px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.crest { color: var(--brass); flex-shrink: 0; }
.letterhead-text h1 {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: 0.3px;
  color: var(--cream-text);
}
.letterhead-text p {
  margin: 4px 0 0;
  font-size: 12.5px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  color: var(--brass);
  opacity: 0.85;
}
.letterhead-meta { margin-left: auto; }
.clerk-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--parchment-dim);
  font-family: 'IBM Plex Mono', monospace;
}
.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--brass);
  display: inline-block;
  animation: pulse 1.6s infinite ease-in-out;
}
.pulse-dot.ok { background: #6E9C5E; animation: none; }
.pulse-dot.err { background: var(--crimson); animation: none; }
@keyframes pulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}

/* ---------- Desk layout ---------- */
.desk {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 28px;
  padding: 32px;
}

.sidebar { display: flex; flex-direction: column; gap: 20px; }
.sidebar-nav { display: flex; flex-direction: column; gap: 4px; }
.nav-tab {
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  background: none;
  border: none;
  color: var(--parchment-dim);
  font-family: 'Inter', sans-serif;
  font-size: 14.5px;
  font-weight: 500;
  padding: 11px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  border-left: 2px solid transparent;
  transition: all 0.15s ease;
}
.nav-index {
  font-family: 'Fraunces', serif;
  font-size: 13px;
  color: var(--brass-dim);
  width: 18px;
}
.nav-tab:hover { background: rgba(199,154,61,0.08); color: var(--cream-text); }
.nav-tab.active {
  background: rgba(199,154,61,0.12);
  border-left-color: var(--brass);
  color: var(--cream-text);
}
.nav-tab.active .nav-index { color: var(--brass); }

.sidebar-note {
  border-top: 1px solid var(--border-soft);
  padding-top: 16px;
  margin-top: 8px;
}
.sidebar-note p {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--parchment-dim);
  opacity: 0.75;
}

/* ---------- Panels ---------- */
.ledger { min-width: 0; }
.panel { display: none; animation: fadeIn 0.25s ease; }
.panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px);} to { opacity: 1; transform: translateY(0);} }

.panel-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-soft);
}
.panel-head h2 { font-size: 24px; font-weight: 600; color: var(--cream-text); }
.panel-sub { font-size: 13px; color: var(--parchment-dim); opacity: 0.7; }

/* ---------- Stats ---------- */
.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.stat-block {
  background: var(--ink-800);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.stat-label {
  display: block;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--brass);
  margin-bottom: 8px;
}
.stat-figure {
  font-family: 'Fraunces', serif;
  font-size: 32px;
  font-weight: 600;
  color: var(--cream-text);
}

/* ---------- Cards ---------- */
.card {
  background: var(--ink-800);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 20px 22px;
}
.card-head h3 { font-size: 16px; color: var(--cream-text); margin-bottom: 14px; }
.major-list { display: flex; flex-direction: column; gap: 10px; }
.major-row { display: flex; align-items: center; gap: 12px; font-size: 13.5px; }
.major-name { width: 170px; color: var(--parchment-dim); flex-shrink: 0; }
.major-bar-track { flex: 1; height: 6px; background: rgba(255,255,255,0.06); border-radius: 3px; overflow: hidden; }
.major-bar-fill { height: 100%; background: linear-gradient(90deg, var(--brass-dim), var(--brass)); }
.major-count { font-family: 'IBM Plex Mono', monospace; color: var(--cream-text); width: 24px; text-align: right; }

.skeleton-line {
  height: 14px;
  background: linear-gradient(90deg, rgba(255,255,255,0.04), rgba(255,255,255,0.09), rgba(255,255,255,0.04));
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: 3px;
  margin-bottom: 10px;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex;
  gap: 12px;
  margin-bottom: 18px;
  align-items: center;
}
.toolbar input, .toolbar select {
  background: var(--ink-800);
  border: 1px solid var(--border-soft);
  color: var(--cream-text);
  padding: 10px 14px;
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: 13.5px;
}
.toolbar input { flex: 1; }
.toolbar input::placeholder { color: var(--parchment-dim); opacity: 0.6; }
.btn-primary {
  background: var(--brass);
  color: var(--ink-900);
  border: none;
  padding: 10px 18px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 13.5px;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s ease;
}
.btn-primary:hover { background: #DBAE52; }
.btn-secondary {
  background: transparent;
  border: 1px solid var(--border-soft);
  color: var(--parchment-dim);
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 12.5px;
  cursor: pointer;
}
.btn-secondary:hover { color: var(--cream-text); border-color: var(--brass); }
.btn-danger {
  background: transparent;
  border: 1px solid rgba(146,49,47,0.5);
  color: #C97472;
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 12.5px;
  cursor: pointer;
  margin-left: 6px;
}
.btn-danger:hover { background: rgba(146,49,47,0.15); }

/* ---------- Table ---------- */
.table-wrap {
  background: var(--ink-800);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
}
.ledger-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.ledger-table thead th {
  text-align: left;
  padding: 12px 16px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--brass);
  border-bottom: 1px solid var(--border-soft);
  background: rgba(199,154,61,0.05);
}
.ledger-table tbody td {
  padding: 13px 16px;
  border-bottom: 1px solid rgba(199,154,61,0.12);
  color: var(--parchment);
}
.ledger-table tbody tr:last-child td { border-bottom: none; }
.ledger-table tbody tr:hover { background: rgba(199,154,61,0.05); }
.roll-no { font-family: 'IBM Plex Mono', monospace; color: var(--brass); font-size: 12.5px; }

/* ---------- Stamp badges ---------- */
.stamp {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  padding: 3px 9px;
  border-radius: 3px;
  border: 1.5px solid currentColor;
  transform: rotate(-2deg);
}
.stamp-active { color: #7FB16A; }
.stamp-leave { color: var(--brass); }
.stamp-graduated { color: #7C9CD4; }
.stamp-enrolled { color: #7FB16A; }
.stamp-completed { color: #7C9CD4; }
.stamp-dropped { color: #C97472; }

/* ---------- Course cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.course-card {
  background: var(--ink-800);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 18px;
  position: relative;
}
.course-code {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  color: var(--brass);
  letter-spacing: 0.5px;
}
.course-title {
  font-family: 'Fraunces', serif;
  font-size: 17px;
  font-weight: 600;
  margin: 6px 0 10px;
  color: var(--cream-text);
}
.course-meta {
  font-size: 12.5px;
  color: var(--parchment-dim);
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}
.course-capacity {
  font-size: 11.5px;
  font-family: 'IBM Plex Mono', monospace;
  color: var(--parchment-dim);
}
.capacity-track {
  height: 4px;
  background: rgba(255,255,255,0.08);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 4px;
}
.capacity-fill { height: 100%; background: var(--brass); }

/* ---------- Modal ---------- */
.modal-backdrop {
  display: none;
  position: fixed; inset: 0;
  background: rgba(10, 14, 24, 0.65);
  align-items: center; justify-content: center;
  z-index: 100;
  backdrop-filter: blur(2px);
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--parchment);
  color: var(--paper-text);
  width: 420px;
  max-width: 90vw;
  border-radius: 6px;
  box-shadow: var(--shadow);
  border: 1px solid var(--brass);
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--parchment-dim);
}
.modal-head h3 { font-size: 18px; color: var(--paper-text); }
.modal-close {
  background: none; border: none; font-size: 22px; cursor: pointer;
  color: var(--paper-text); line-height: 1;
}
.modal-body { padding: 20px; display: flex; flex-direction: column; gap: 12px; max-height: 70vh; overflow-y: auto; }
.modal-body label {
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--brass-dim);
  font-weight: 600;
  display: block;
  margin-bottom: 4px;
}
.modal-body input, .modal-body select {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--parchment-dim);
  border-radius: 3px;
  background: #fff;
  font-family: 'Inter', sans-serif;
  font-size: 13.5px;
  color: var(--paper-text);
}
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 6px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--ink-800);
  border: 1px solid var(--brass);
  color: var(--cream-text);
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 13.5px;
  opacity: 0;
  pointer-events: none;
  transition: all 0.25s ease;
  z-index: 200;
  box-shadow: var(--shadow);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { border-color: var(--crimson); }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .desk { grid-template-columns: 1fr; }
  .sidebar-nav { flex-direction: row; overflow-x: auto; }
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}