/* Минимальный CSS — без фреймворков, без JS. */

:root {
  --bg: #fafafa;
  --fg: #1c1c1c;
  --muted: #6c6c6c;
  --accent: #0066cc;
  --warn-bg: #fff4e0;
  --warn-fg: #864c00;
  --error-bg: #ffe9ea;
  --error-fg: #a40015;
  --border: #d8d8d8;
  --row: #fff;
  --row-alt: #f3f3f3;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a1a;
    --fg: #ececec;
    --muted: #8c8c8c;
    --accent: #6bb7ff;
    --warn-bg: #3a2a10;
    --warn-fg: #ffcf89;
    --error-bg: #3a1418;
    --error-fg: #ff9aa5;
    --border: #353535;
    --row: #1f1f1f;
    --row-alt: #232323;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

.site-header {
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
}
.brand { font-size: 1.1rem; }
.brand strong { font-weight: 600; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 0.75rem 1rem;
  text-align: center;
  color: var(--muted);
}

h2 { margin-top: 0; }
h3 { margin: 1.5rem 0 0.5rem; }
h4 { margin: 1rem 0 0.25rem; }

.muted { color: var(--muted); }
.notice {
  background: var(--warn-bg);
  color: var(--warn-fg);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}
.warn {
  background: var(--warn-bg);
  color: var(--warn-fg);
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  display: inline-block;
}
.error {
  background: var(--error-bg);
  color: var(--error-fg);
  padding: 0.6rem 0.8rem;
  border-radius: 6px;
  white-space: pre-wrap;
}

/* Главная */
.cta {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  background: var(--accent);
  color: #fff;
  border-radius: 6px;
  font-weight: 500;
}
.cta:hover { text-decoration: none; opacity: 0.92; }

.search { margin-top: 2rem; }
.search fieldset {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 1rem;
  margin: 0 0 0.75rem;
}
.search legend { font-size: 0.9rem; color: var(--muted); padding: 0 0.25rem; }
.search label { margin-right: 1rem; }
.search .row { display: flex; gap: 0.5rem; }
.search input[type="text"] {
  flex: 1;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--row);
  color: var(--fg);
  font: inherit;
}
.search button {
  padding: 0.55rem 1.2rem;
  border: none;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  cursor: pointer;
}
.search .hint { font-size: 0.9rem; color: var(--muted); margin-top: 0.75rem; }

/* Расписание */
.schedule-header { margin-bottom: 1rem; }
.schedule-header h2 small { color: var(--muted); font-weight: 400; }

.week + .week { margin-top: 1.5rem; }
.day { margin: 0.5rem 0 1.5rem; }

.lessons {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}
.lessons th, .lessons td {
  text-align: left;
  padding: 0.45rem 0.6rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.lessons th {
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.05em;
}
.lessons tbody tr:nth-child(even) { background: var(--row-alt); }
.lessons tbody tr:nth-child(odd)  { background: var(--row); }

@media (max-width: 700px) {
  .lessons thead { display: none; }
  .lessons, .lessons tbody, .lessons tr, .lessons td { display: block; width: 100%; }
  .lessons tr { padding: 0.5rem; border-bottom: 1px solid var(--border); }
  .lessons td { border: none; padding: 0.1rem 0; }
  .lessons td:empty { display: none; }
}

.ambiguous-list { padding-left: 1.25rem; }
.ambiguous-list li { margin: 0.25rem 0; }

.back { display: inline-block; margin-top: 1.5rem; color: var(--muted); }