/* ============================================================================
   uni-timetable — Monad style reference (see DESIGN.md)
   Editorial tech-journal look: warm parchment canvas, serif headlines (400),
   monospace UI strings, hairline ash borders, pill containers,
   Lake Blue reserved for the single primary action.
   ========================================================================== */

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

:root {
  /* Colors */
  --color-parchment: #f6f3f1;
  --color-lake-blue: #2b59d1;
  --color-periwinkle-mist: #cfdaf5;
  --color-sky-blue: #a0b5eb;
  --color-mint: #a7fccd;
  --color-coral: #ff9473;
  --color-gold: #ecda98;
  --color-crimson: #f37a0a;
  --color-off-black: #242424;
  --color-ink: #000000;
  --color-graphite: #4e4d4d;
  --color-smoke: #797776;
  --color-ash: #cecac8;

  /* Typography — Font Families */
  --font-mono: 'ABC Diatype Mono', 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-serif: 'Untitled Serif', ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;

  /* Typography — Scale */
  --text-caption: 12px;
  --text-body-sm: 14px;
  --text-body: 16px;
  --text-label: 18px;
  --text-subheading: 24px;
  --text-heading-sm: 32px;

  /* Spacing */
  --spacing-8: 8px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-32: 32px;
  --spacing-40: 40px;

  /* Layout */
  --card-padding: 24px;

  /* Border Radius */
  --radius-cards: 24px;
  --radius-buttons: 100px;
  --radius-pills: 9999px;

  /* Shadows */
  --shadow-md: rgba(0, 0, 0, 0.1) 0px 0px 10px 0px;

  /* Semantic aliases (kept from previous stylesheet) */
  --accent: var(--color-lake-blue);
  --text: var(--color-off-black);
  --muted: var(--color-smoke);
  --border: var(--color-ash);
  --bg: var(--color-parchment);
  --card: var(--color-parchment);
}

html { height: 100%; }

body {
  font-family: var(--font-mono);
  font-size: 14px; line-height: 1.35; letter-spacing: -0.28px;
  color: var(--text); background: var(--bg);
  min-height: 100%;
}

.wrap { max-width: 1080px; margin: 0 auto; padding: 24px 20px 60px; }

a { color: var(--accent); text-decoration-color: var(--border); }

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

::selection { background: var(--color-periwinkle-mist); }

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

/* ---- top bar ------------------------------------------------------------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--bg); border-bottom: 1px solid var(--border);
  padding: 16px 24px;
}
.brand {
  font-family: var(--font-serif);
  font-size: 22px; font-weight: 400; letter-spacing: -0.44px;
  color: var(--text); text-decoration: none;
  display: flex; align-items: baseline; gap: 10px;
}
.brand small {
  font-family: var(--font-mono);
  font-weight: 400; font-size: 11px; letter-spacing: -0.4px;
  text-transform: uppercase; color: var(--muted);
}
.topnav { display: flex; gap: 8px; align-items: center; }
.topnav a {
  padding: 7px 16px; border-radius: var(--radius-buttons);
  border: 1px solid transparent;
  color: var(--text); text-decoration: none;
  font-size: 12px; letter-spacing: -0.4px; text-transform: uppercase;
}
.topnav a:hover { border-color: var(--border); }
.topnav a.active { background: var(--text); color: var(--bg); }
.topnav a.site-link { color: var(--accent); }
.topnav a.site-link:hover { border-color: var(--accent); }

/* - search ---------------------------------------------------------------- */
.search-section { padding: 48px 0 8px; max-width: 640px; margin: 0 auto; }
.search-box { position: relative; display: flex; align-items: center; }
.search-input {
  width: 100%; padding: 14px 44px 14px 20px; font: inherit; font-size: 16px; letter-spacing: -0.4px;
  border: 1px solid var(--border); border-radius: var(--radius-buttons); background: var(--card);
}
.search-input::placeholder { color: var(--muted); }
.search-input:focus { outline: none; border-color: var(--accent); }
.search-icon {
  position: absolute; right: 18px; font-size: 18px; color: var(--muted);
  transform: rotate(-15deg); pointer-events: none;
}
.admin-search { max-width: 420px; margin: 12px 0 16px; gap: 8px; }
.admin-search .search-input { padding: 10px 42px 10px 16px; font-size: 14px; }

.search-results {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius-cards); margin-top: 8px; overflow: hidden;
  box-shadow: var(--shadow-md);
}
.search-result {
  display: flex; justify-content: space-between; align-items: baseline; gap: 12px;
  padding: 12px 20px; text-decoration: none; color: var(--text); border-bottom: 1px solid var(--border);
}
.search-result:last-child { border-bottom: none; }
.search-result:hover { background: var(--color-periwinkle-mist); }
.sr-name { font-weight: 500; font-size: 15px; }
.sr-group { color: var(--muted); font-size: 12px; letter-spacing: -0.4px; white-space: nowrap; }
.search-meta {
  padding: 10px 20px; color: var(--muted);
  font-size: 12px; letter-spacing: -0.4px; text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

/* - student header -------------------------------------------------------- */
.student-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin: 24px 0 16px; }
.student-header h1 { font-size: var(--text-heading-sm); letter-spacing: -0.64px; }
.sh-left { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.badge {
  font-size: 11px; letter-spacing: -0.4px; text-transform: uppercase;
  color: var(--text); background: var(--color-periwinkle-mist);
  padding: 4px 12px; border-radius: var(--radius-pills);
}
.badge-muted { background: transparent; border: 1px solid var(--border); color: var(--muted); }

/* - responsive view switching ----------------------------------------------- */
/* Both views are rendered server-side; CSS picks one: week grid on wide
   screens, compact day list on narrow ones. No manual toggle. */
.view-day { display: none; }
@media (max-width: 760px) {
  .view-week { display: none; }
  .view-day { display: block; }
  .search-section { padding-top: 24px; }
  .student-header h1 { font-size: var(--text-subheading); letter-spacing: -0.48px; }
}

/* - week grid -------------------------------------------------------------- */
.week-grid { width: 100%; border-collapse: separate; border-spacing: 4px; }
.week-grid thead th {
  font-size: 11px; font-weight: 500; color: var(--muted); text-transform: uppercase;
  letter-spacing: -0.33px; padding: 8px 4px 6px; text-align: center; border-radius: 6px;
}
.week-grid thead th.is-today { color: var(--accent); background: var(--color-periwinkle-mist); }
.week-grid tbody tr { }
.col-time {
  width: 86px; vertical-align: top; font-weight: 500; font-size: 14px;
  font-variant-numeric: tabular-nums; padding: 10px 8px 0 0; text-align: right; white-space: nowrap;
}
.row-end { display: block; font-weight: 400; color: var(--muted); font-size: 12px; }
.week-cell {
  vertical-align: top; background: var(--card); border: 1px solid var(--border);
  border-radius: 16px; padding: 8px; min-height: 64px; width: 13%;
}
.week-cell.is-today { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }

/* - lesson cards ----------------------------------------------------------- */
.lesson-card {
  padding: 8px 10px; margin: 2px 0; border-radius: 12px;
  border-left: 3px solid var(--color-ash); background: transparent;
}
.lc-title { font-weight: 500; font-size: 13px; line-height: 1.35; }
.lc-meta { font-size: 12px; color: var(--color-graphite); margin-top: 2px; }
.lesson-lecture { border-left-color: var(--accent); background: var(--color-periwinkle-mist); }
.lesson-seminar { border-left-color: #34b98a; background: var(--color-mint); }
.lesson-practice { border-left-color: #c9a83f; background: var(--color-gold); }
.lesson-lab { border-left-color: var(--color-sky-blue); background: #e6ecfa; }
.lesson-pe { border-left-color: var(--color-coral); background: #ffe9e1; }

/* - day view --------------------------------------------------------------- */
.day-select { display: flex; gap: 6px; flex-wrap: wrap; margin: 24px 0 4px; }
.btn-day { background: var(--card); border-color: var(--border); }
.btn-day.active { background: var(--text); border-color: var(--text); color: var(--bg); }
.btn-day.is-today:not(.active) { border-color: var(--accent); color: var(--accent); }
.day-title { font-size: var(--text-subheading); letter-spacing: -0.48px; margin: 16px 0 10px; }
.day-lessons { display: flex; flex-direction: column; gap: 8px; }
.day-lesson {
  display: flex; gap: 16px; background: var(--card); border: 1px solid var(--border);
  border-left: 3px solid var(--color-ash); border-radius: 16px; padding: 14px 20px;
}
.day-lesson.lesson-lecture { border-left-color: var(--accent); }
.day-lesson.lesson-seminar { border-left-color: #34b98a; }
.day-lesson.lesson-practice { border-left-color: #c9a83f; }
.day-lesson.lesson-lab { border-left-color: var(--color-sky-blue); }
.day-lesson.lesson-pe { border-left-color: var(--color-coral); }
.dl-time { font-weight: 500; font-variant-numeric: tabular-nums; white-space: nowrap; min-width: 96px; }
.dl-title { font-weight: 500; font-size: 16px; letter-spacing: -0.4px; }
.dl-meta { display: flex; gap: 12px; align-items: center; color: var(--color-graphite); font-size: 13px; margin-top: 3px; flex-wrap: wrap; }
.kind-tag {
  font-size: 11px; letter-spacing: -0.33px; text-transform: uppercase;
  color: var(--muted); background: transparent; border: 1px solid var(--border);
  padding: 2px 10px; border-radius: var(--radius-pills);
}

/* ---- shared UI ------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; gap: 6px; justify-content: center;
  padding: 8px 20px; border-radius: var(--radius-buttons); background: transparent; color: var(--text);
  text-decoration: none; font: inherit; font-size: 13px; letter-spacing: -0.26px; text-transform: uppercase;
  border: 1px solid var(--text); cursor: pointer; white-space: nowrap;
}
.btn:hover { background: var(--color-off-black); color: var(--bg); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.btn-primary:hover { background: #2148ab; border-color: #2148ab; color: #fff; }
.btn-danger { background: transparent; border-color: var(--color-coral); color: var(--color-crimson); }
.btn-danger:hover { background: var(--color-coral); border-color: var(--color-coral); color: var(--text); }
.btn-sm { padding: 4px 12px; font-size: 12px; letter-spacing: -0.4px; }
.btn.active { background: var(--text); border-color: var(--text); color: var(--bg); }
.flash {
  background: var(--color-mint); color: var(--text); border: 1px solid var(--border);
  padding: 10px 20px; border-radius: var(--radius-buttons);
  font-size: 13px; letter-spacing: -0.26px; margin: 16px 0;
  display: inline-block;
}
.muted { color: var(--muted); }
.small { font-size: 12px; }
.empty { color: var(--muted); font-size: 14px; padding: 8px 0; }
.empty-state { text-align: center; color: var(--muted); padding: 60px 0; font-size: 14px; letter-spacing: -0.28px; }

/* ---- admin --------------------------------------------------------------- */
.page-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 24px 0 6px; flex-wrap: wrap; }
.page-title { font-size: var(--text-heading-sm); letter-spacing: -0.64px; margin: 24px 0 8px; }
.panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-cards); padding: var(--card-padding); margin: 18px 0; }
.panel-title { font-size: var(--text-subheading); letter-spacing: -0.48px; margin-bottom: 12px; }
.not-found { max-width: 480px; margin: 60px auto; text-align: center; padding: var(--spacing-32); }
.not-found p { margin: 10px 0 18px; color: var(--muted); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; margin: 16px 0; }
.stat-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-cards);
  padding: var(--card-padding); text-decoration: none; color: var(--text);
  display: flex; flex-direction: column; gap: 4px;
  font-size: 12px; letter-spacing: -0.4px; text-transform: uppercase; color: var(--muted);
}
.stat-card:hover { border-color: var(--text); }
.stat-card strong {
  font-family: var(--font-serif); font-weight: 400;
  font-size: 40px; letter-spacing: -0.8px; line-height: 1.2;
  color: var(--text); font-variant-numeric: tabular-nums;
}

.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
.data-table th {
  font-size: 11px; font-weight: 500; color: var(--muted);
  text-transform: uppercase; letter-spacing: -0.33px;
}
.data-table tr:hover td { background: #efeae6; }
.data-table .col-actions { text-align: right; white-space: nowrap; width: 1%; }
.data-table .col-actions .btn { margin-left: 6px; }
.col-time-wide { white-space: nowrap; font-weight: 500; font-variant-numeric: tabular-nums; width: 110px; }
.badges-cell { display: flex; gap: 6px; flex-wrap: wrap; }

.lesson-line { display: flex; gap: 10px; align-items: baseline; flex-wrap: wrap; }
.lesson-line-title { font-weight: 500; }
.assign-line { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 4px; }
.assign-tag {
  border: 1px solid var(--border); border-radius: var(--radius-pills);
  padding: 2px 10px; font-size: 11px; letter-spacing: -0.33px;
}
.assign-group { color: var(--accent); background: var(--color-periwinkle-mist); border-color: transparent; }
.assign-subgroup { color: #1d7a58; background: var(--color-mint); border-color: transparent; }
.assign-student { color: var(--text); background: var(--color-gold); border-color: transparent; }

/* - forms ------------------------------------------------------------------ */
.data-form { max-width: 720px; display: flex; flex-direction: column; gap: 14px; margin-top: 14px; }
.data-form label {
  display: flex; flex-direction: column; gap: 6px;
  font-size: 11px; font-weight: 500; letter-spacing: -0.33px;
  text-transform: uppercase; color: var(--muted);
}
.data-form input, .data-form select {
  padding: 10px 14px; font: inherit; font-size: 14px; letter-spacing: -0.28px; font-weight: 400;
  border: 1px solid var(--border); border-radius: 12px; background: var(--card);
  color: var(--text);
}
.data-form input:focus, .data-form select:focus { outline: none; border-color: var(--accent); }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.form-actions { display: flex; gap: 10px; align-items: center; margin-top: 6px; }
.inline-add { display: flex; gap: 8px; margin-top: 12px; max-width: 340px; }
.inline-add input { flex: 1; padding: 8px 14px; font: inherit; font-size: 14px; border: 1px solid var(--border); border-radius: var(--radius-buttons); background: var(--card); }

/* - assignment editor ------------------------------------------------------ */
.assign-panel { max-width: none; }
.assign-blocks { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 4px; }
@media (max-width: 760px) { .assign-blocks { grid-template-columns: 1fr; } }
.assign-group-row { padding: 8px 0; border-bottom: 1px dashed var(--border); }
.assign-group-row:last-child { border-bottom: none; }
.assign-subs { display: flex; gap: 6px 18px; flex-wrap: wrap; padding-left: 24px; margin-top: 4px; }
.check { display: flex !important; flex-direction: row !important; align-items: center; gap: 8px; font-weight: 400 !important; font-size: 14px !important; text-transform: none !important; color: var(--text) !important; cursor: pointer; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }
.check input[type="checkbox"] { width: auto; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; min-height: 30px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--color-periwinkle-mist); color: var(--accent);
  border-radius: var(--radius-pills); padding: 3px 6px 3px 14px;
  font-size: 13px; letter-spacing: -0.26px; font-weight: 500;
}
.chip-x {
  border: none; background: transparent; color: var(--accent); cursor: pointer;
  font-size: 15px; line-height: 1; padding: 3px 6px; border-radius: 50%;
}
.chip-x:hover { background: rgba(43, 89, 209, 0.15); }

.add-list { list-style: none; border: 1px solid var(--border); border-radius: 16px; background: var(--card); margin-top: 6px; overflow: hidden; }
.add-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 8px 14px; border-bottom: 1px solid var(--border); }
.add-row:last-child { border-bottom: none; }
.add-name { font-size: 14px; }
.add-row.empty { justify-content: flex-start; }