:root {
  --bg: #FAF9F5;
  --ink: #1F1D1A;
  --muted: #6B6558;
  --accent: #3B6E64;
  --accent-hover: #2C544A;
  --accent-soft-bg: #EAF3F0;
  --accent-softer-bg: #F3F9F7;
  --border: #E5E1D8;
  --border-soft: #E7E3D9;
  --chip-bg: #F3F1EA;
  --dash-border: #E2DDCF;
  --dash-divider: #D9D4C7;
  --badge-a-fg: #8A6D3A;
  --badge-a-bg: #F3EBDA;
  --badge-b-fg: #3B6E64;
  --badge-b-bg: #E4EEEC;
  --dot-num: #3B6E64;
  --dot-den: #B8B2A2;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  font-family: 'Golos Text', system-ui, sans-serif;
  color: var(--ink);
}

a { color: var(--accent); }
a:hover { color: var(--accent-hover); }
button { font-family: inherit; }

.meta { font-size: 12px; color: var(--muted); }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 16px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 12px; }

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.brand-title { font-size: 15px; font-weight: 700; }
.brand-subtitle { font-size: 12px; color: var(--muted); }

.header-controls {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.mode-switch {
  display: flex;
  background: var(--chip-bg);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}

.mode-btn {
  border: none;
  background: transparent;
  color: var(--muted);
  font-weight: 600;
  font-size: 13px;
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
}

.mode-btn[aria-selected="true"] {
  background: #FFFFFF;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(20, 20, 19, 0.08);
}

.selector-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 10px;
  padding: 9px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  max-width: 260px;
}

.selector-btn #selector-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.selector-btn .chevron { font-size: 10px; color: var(--muted); flex-shrink: 0; }

.week-nav { display: flex; align-items: center; gap: 8px; }

.week-arrow {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  width: 30px;
  height: 30px;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
}
.week-arrow:hover { color: var(--ink); }

.week-info { text-align: center; min-width: 130px; }
.week-number { font-size: 13px; font-weight: 600; }

.week-parity {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 9px;
  border-radius: 999px;
  display: inline-block;
  margin-top: 2px;
}
.week-parity.num { color: var(--accent); background: var(--accent-soft-bg); }
.week-parity.den { color: var(--muted); background: var(--chip-bg); }

/* ---------- Selector overlay/panel ---------- */

.selector-overlay {
  position: fixed;
  inset: 0;
  background: rgba(31, 29, 26, 0.35);
  z-index: 20;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 90px 16px 16px;
}

.selector-panel {
  background: #fff;
  border-radius: 14px;
  border: 1px solid var(--border);
  width: 100%;
  max-width: 360px;
  box-shadow: 0 12px 32px rgba(20, 20, 19, 0.16);
  overflow: hidden;
}

.selector-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-soft);
  font-weight: 700;
  font-size: 14px;
}

.close-btn {
  border: none;
  background: transparent;
  font-size: 16px;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
  padding: 4px;
}
.close-btn:hover { color: var(--ink); }

.selector-panel-body {
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.selector-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
}

.selector-field select {
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  padding: 9px 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
}

/* ---------- Main / grid ---------- */

.page-main {
  max-width: 1320px;
  margin: 0 auto;
  padding: 28px 40px 40px;
}

.schedule-empty {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
  font-size: 14px;
}

.schedule-grid {
  display: grid;
  grid-template-columns: 92px repeat(5, 1fr);
  gap: 10px;
}

.day-head {
  padding: 8px 6px;
  text-align: center;
  border-radius: 10px;
}
.day-head.today { background: var(--accent-soft-bg); }
.day-head-name { font-size: 12px; font-weight: 700; }
.day-head.today .day-head-name { color: var(--accent); }
.day-head-date { font-size: 11px; color: var(--muted); }
.day-head.today .day-head-date { color: var(--accent); }

.pair-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
}

.pair-number {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--chip-bg);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pair-time {
  font-size: 10px;
  color: var(--muted);
  text-align: center;
  line-height: 1.2;
}

.cell-empty {
  border: 1px dashed var(--dash-border);
  border-radius: 10px;
  min-height: 78px;
}

.card {
  background: #FFFFFF;
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  min-height: 78px;
  box-shadow: 0 1px 2px rgba(20, 20, 19, 0.05);
  overflow: hidden;
}

.card.current {
  border: 1.5px solid var(--accent);
  background: var(--accent-softer-bg);
  position: relative;
}

.current-badge {
  position: absolute;
  top: -9px;
  left: 10px;
  font-size: 10px;
  font-weight: 700;
  color: #fff;
  background: var(--accent);
  padding: 2px 8px;
  border-radius: 999px;
  z-index: 1;
}

.lesson-columns {
  display: flex;
  height: 100%;
}

.lesson-column {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.lesson-column + .lesson-column {
  border-left: 1px dashed var(--dash-divider);
}

.lesson-layer {
  padding: 9px 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.lesson-layer.simple { padding: 10px 12px; }

.card.split .lesson-layer { padding: 7px 8px; }
.card.split .lesson-layer.simple { padding: 8px 8px; }
.card.split .subj { font-size: 12px; }
.card.split .room { font-size: 10px; padding: 1px 6px; }
.card.split .meta { font-size: 11px; }

.lesson-layer.dim { opacity: 0.55; }

.lesson-layer + .lesson-layer {
  border-top: 1px dashed var(--dash-divider);
}

.lesson-parity-tag {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  font-weight: 700;
}
.lesson-parity-tag.num { color: var(--accent); }
.lesson-parity-tag.den { color: var(--muted); }

.lesson-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 6px;
}

.subj {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.25;
  color: var(--ink);
  min-width: 0;
  flex: 1 1 auto;
  overflow-wrap: break-word;
}

.room {
  font-size: 11px;
  color: var(--muted);
  background: var(--chip-bg);
  border-radius: 999px;
  padding: 2px 8px;
  white-space: nowrap;
  flex-shrink: 0;
}
.card.current .room { background: #fff; }

.badge-a, .badge-b {
  font-size: 10px;
  font-weight: 700;
  border-radius: 999px;
  width: 17px;
  height: 17px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.badge-a { color: var(--badge-a-fg); background: var(--badge-a-bg); }
.badge-b { color: var(--badge-b-fg); background: var(--badge-b-bg); }

.dot-num, .dot-den {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  display: inline-block;
}
.dot-num { background: var(--dot-num); }
.dot-den { background: var(--dot-den); }

/* ---------- Legend ---------- */

.legend {
  margin-top: 26px;
  padding: 14px 18px;
  background: #FFFFFF;
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  align-items: center;
}

.legend-item { display: flex; align-items: center; gap: 8px; }

.legend-swatch {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  display: inline-block;
}
.legend-swatch.current { background: var(--accent); }
.legend-swatch.empty { border: 1px dashed var(--dash-border); }

/* ---------- Mobile day tabs ---------- */

.day-tabs {
  display: none;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 4px;
  margin-bottom: 16px;
}

.day-tab {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}

.day-tab[aria-selected="true"] {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .header-inner { padding: 14px 16px; }
  .page-main { padding: 20px 16px 32px; }

  .day-tabs { display: flex; }

  .schedule-grid {
    grid-template-columns: 60px 1fr;
  }

  .schedule-grid .day-head,
  .schedule-grid .card,
  .schedule-grid .cell-empty {
    display: none;
  }

  .schedule-grid .day-head.active,
  .schedule-grid .card.active,
  .schedule-grid .cell-empty.active {
    display: block;
  }

  .schedule-grid .card.active {
    display: flex;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .header-controls { width: 100%; justify-content: space-between; }
  .selector-btn { max-width: 160px; }
  .week-info { min-width: 100px; }
}