/* Fall 2026 Study Calendar */

:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --panel-2: #fbfcfd;
  --ink: #14181f;
  --ink-2: #4a5462;
  --ink-3: #7c8797;
  --line: #e2e6eb;
  --line-2: #eef1f4;
  --accent: #2563eb;
  --good: #059669;
  --warn: #b45309;
  --bad: #dc2626;
  --grace: #7c3aed;
  --b03: #2563eb;
  --bb3: #059669;
  --ba3: #c2410c;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 1px 3px rgba(16, 24, 40, .06);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1117; --panel: #161b22; --panel-2: #1c222b;
    --ink: #e6edf3; --ink-2: #a9b4c0; --ink-3: #7d8896;
    --line: #2b3240; --line-2: #222833;
    --accent: #6ea8fe; --good: #3fb98a; --warn: #e0a049; --bad: #f2685f; --grace: #b490f5;
    --b03: #6ea8fe; --bb3: #3fb98a; --ba3: #f0885a;
    --shadow: 0 1px 2px rgba(0, 0, 0, .35);
  }
}

:root[data-theme="dark"] {
  --bg: #0d1117; --panel: #161b22; --panel-2: #1c222b;
  --ink: #e6edf3; --ink-2: #a9b4c0; --ink-3: #7d8896;
  --line: #2b3240; --line-2: #222833;
  --accent: #6ea8fe; --good: #3fb98a; --warn: #e0a049; --bad: #f2685f; --grace: #b490f5;
  --b03: #6ea8fe; --bb3: #3fb98a; --ba3: #f0885a;
  --shadow: 0 1px 2px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 48px;
}

button { font: inherit; color: inherit; }

/* ---- top bar ------------------------------------------------------- */

.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-mark { font-size: 22px; }
.brand-title { font-weight: 650; letter-spacing: -.01em; }
.brand-sub { font-size: 11px; color: var(--ink-3); letter-spacing: .04em; text-transform: uppercase; }

.level-block { flex: 1 1 260px; min-width: 200px; display: flex; align-items: center; gap: 12px; }

.level-badge {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 12px; flex: none;
  background: linear-gradient(145deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #7c3aed));
  color: #fff; line-height: 1;
}
.level-badge b { font-size: 17px; font-weight: 700; }
.level-badge span { font-size: 8px; letter-spacing: .12em; text-transform: uppercase; opacity: .85; }

.xp-wrap { flex: 1; min-width: 0; }
.xp-top { display: flex; justify-content: space-between; font-size: 11.5px; color: var(--ink-2); margin-bottom: 4px; gap: 8px; }
.xp-bar { height: 7px; border-radius: 999px; background: var(--line); overflow: hidden; }
.xp-fill { height: 100%; border-radius: 999px; background: var(--accent); transition: width .3s ease; }
.xp-fill.hit { background: var(--good); }

.topbar-right { display: flex; align-items: center; gap: 8px; margin-left: auto; }

.icon-btn {
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 8px; padding: 6px 11px; cursor: pointer;
  font-size: 13px; line-height: 1.2;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }

.sync-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--ink-3); flex: none; }
.sync-dot.ok { background: var(--good); }
.sync-dot.off { background: var(--bad); }
.sync-dot.pending { background: var(--warn); }

/* ---- tabs ---------------------------------------------------------- */

.tabs {
  display: flex; gap: 2px; padding: 0 12px;
  background: var(--panel); border-bottom: 1px solid var(--line);
  position: sticky; top: 63px; z-index: 19; overflow-x: auto;
}
.tab {
  background: none; border: 0; border-bottom: 2px solid transparent;
  padding: 10px 12px; cursor: pointer; color: var(--ink-2);
  font-size: 13.5px; white-space: nowrap;
}
.tab.active { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }
.pill {
  display: inline-block; min-width: 18px; padding: 1px 5px; margin-left: 4px;
  border-radius: 999px; background: var(--line); font-size: 11px; text-align: center;
}
.pill.hot { background: var(--bad); color: #fff; }

/* ---- layout -------------------------------------------------------- */

main { padding: 16px; max-width: 1180px; margin: 0 auto; }

.grid-2 { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 16px; align-items: start; }
@media (max-width: 900px) { .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
}
.card + .card { margin-top: 14px; }
.card-head {
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  padding: 12px 14px; border-bottom: 1px solid var(--line-2); background: var(--panel-2);
}
.card-head h2 { margin: 0; font-size: 14.5px; font-weight: 650; letter-spacing: -.01em; }
.card-head .sub { font-size: 12px; color: var(--ink-3); }
.card-head .spacer { margin-left: auto; }
.card-body { padding: 12px 14px; }
.card-body.tight { padding: 0; }

/* ---- task rows ----------------------------------------------------- */

.task {
  display: flex; gap: 10px; padding: 10px 14px;
  border-bottom: 1px solid var(--line-2); align-items: flex-start;
  border-left: 3px solid transparent;
}
.task:last-child { border-bottom: 0; }
.task[data-course="b03"] { border-left-color: var(--b03); }
.task[data-course="bb3"] { border-left-color: var(--bb3); }
.task[data-course="ba3"] { border-left-color: var(--ba3); }
.task.is-done { background: color-mix(in srgb, var(--good) 6%, transparent); }
.task.is-missed { background: color-mix(in srgb, var(--bad) 6%, transparent); }
.task.is-grace { background: color-mix(in srgb, var(--grace) 7%, transparent); }
.task.is-contact { opacity: .92; }
.task.is-cancelled { opacity: .58; }
.task.is-cancelled .task-title { text-decoration: line-through; text-decoration-thickness: 1px; }

.task input[type=checkbox] {
  width: 19px; height: 19px; margin: 1px 0 0; flex: none; cursor: pointer;
  accent-color: var(--good);
}
.task-main { min-width: 0; flex: 1; }
.task-title { font-weight: 550; line-height: 1.35; }
.task.is-done .task-title { text-decoration: line-through; color: var(--ink-3); text-decoration-thickness: 1px; }
.task-detail { font-size: 12.5px; color: var(--ink-2); margin-top: 3px; overflow-wrap: anywhere; }
.task-meta { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; align-items: center; }

.chip {
  font-size: 10.5px; letter-spacing: .03em; text-transform: uppercase;
  padding: 2px 6px; border-radius: 5px; background: var(--line-2); color: var(--ink-2);
  border: 1px solid var(--line); white-space: nowrap;
}
.chip.course-b03 { color: var(--b03); border-color: color-mix(in srgb, var(--b03) 35%, var(--line)); }
.chip.course-bb3 { color: var(--bb3); border-color: color-mix(in srgb, var(--bb3) 35%, var(--line)); }
.chip.course-ba3 { color: var(--ba3); border-color: color-mix(in srgb, var(--ba3) 35%, var(--line)); }
.chip.xp { color: var(--accent); font-variant-numeric: tabular-nums; }
.chip.crit { background: color-mix(in srgb, var(--bad) 14%, transparent); color: var(--bad); border-color: color-mix(in srgb, var(--bad) 30%, var(--line)); font-weight: 600; }
.chip.grace { background: color-mix(in srgb, var(--grace) 14%, transparent); color: var(--grace); border-color: color-mix(in srgb, var(--grace) 30%, var(--line)); }
.chip.warnc { background: color-mix(in srgb, var(--warn) 14%, transparent); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 30%, var(--line)); }

.task-actions { display: flex; gap: 4px; flex: none; }
.mini {
  background: none; border: 1px solid var(--line); border-radius: 6px;
  font-size: 11px; padding: 3px 7px; cursor: pointer; color: var(--ink-3);
}
.mini:hover { color: var(--accent); border-color: var(--accent); }

/* ---- day header ---------------------------------------------------- */

.dayhead { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.dayhead h2 { margin: 0; font-size: 16px; }
.daynav { display: flex; gap: 4px; margin-left: auto; }

.progress-line { display: flex; align-items: center; gap: 10px; margin-top: 8px; font-size: 12px; color: var(--ink-2); }
.progress-track { flex: 1; height: 6px; background: var(--line); border-radius: 999px; overflow: hidden; min-width: 80px; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 999px; transition: width .3s; }
.progress-fill.done { background: var(--good); }

.banner {
  padding: 9px 12px; border-radius: 8px; font-size: 12.5px;
  border: 1px solid var(--line); background: var(--panel-2); margin-bottom: 12px;
}
.banner.good { border-color: color-mix(in srgb, var(--good) 40%, var(--line)); background: color-mix(in srgb, var(--good) 8%, var(--panel)); }
.banner.warn { border-color: color-mix(in srgb, var(--warn) 40%, var(--line)); background: color-mix(in srgb, var(--warn) 9%, var(--panel)); }
.banner.bad  { border-color: color-mix(in srgb, var(--bad) 40%, var(--line)); background: color-mix(in srgb, var(--bad) 8%, var(--panel)); }
.banner.rest { border-style: dashed; }

/* ---- calendar grid -------------------------------------------------- */

.cal-grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 4px; }
.cal-dow { font-size: 11px; color: var(--ink-3); text-align: center; padding: 4px 0; text-transform: uppercase; letter-spacing: .05em; }
.cal-cell {
  border: 1px solid var(--line); border-radius: 8px; background: var(--panel-2);
  min-height: 72px; padding: 5px 6px; cursor: pointer; text-align: left;
  display: flex; flex-direction: column; gap: 3px; overflow: hidden;
}
.cal-cell:hover { border-color: var(--accent); }
.cal-cell.other { opacity: .38; }
.cal-cell.today { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }
.cal-cell.rest { background: repeating-linear-gradient(135deg, var(--panel-2), var(--panel-2) 6px, var(--panel) 6px, var(--panel) 12px); }
.cal-cell.complete { background: color-mix(in srgb, var(--good) 12%, var(--panel-2)); border-color: color-mix(in srgb, var(--good) 40%, var(--line)); }
.cal-cell.partial { background: color-mix(in srgb, var(--warn) 9%, var(--panel-2)); }
.cal-cell.overdue { background: color-mix(in srgb, var(--bad) 9%, var(--panel-2)); }
.cal-num { font-size: 12px; font-weight: 600; color: var(--ink-2); display: flex; justify-content: space-between; align-items: center; }
.cal-count { font-size: 10px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.cal-dots { display: flex; gap: 2px; flex-wrap: wrap; }
.cal-dot { width: 5px; height: 5px; border-radius: 50%; }
.cal-dot.b03 { background: var(--b03); } .cal-dot.bb3 { background: var(--bb3); } .cal-dot.ba3 { background: var(--ba3); }
.cal-flag { font-size: 9.5px; line-height: 1.25; color: var(--bad); font-weight: 600; overflow: hidden; }
.cal-month { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.cal-month h3 { margin: 0; font-size: 14px; }

/* ---- readiness ----------------------------------------------------- */

.ready-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.ready {
  border: 1px solid var(--line); border-radius: 9px; padding: 11px 12px; background: var(--panel-2);
}
.ready-top { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.ready-name { font-weight: 600; font-size: 13px; }
.ready-w { font-size: 11px; color: var(--ink-3); }
.ready-pct { font-size: 22px; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.1; margin: 6px 0 2px; }
.ready-bar { height: 8px; background: var(--line); border-radius: 999px; overflow: hidden; position: relative; }
.ready-bar i { position: absolute; inset: 0 auto 0 80%; width: 2px; background: var(--ink-3); opacity: .55; }
.ready-fill { height: 100%; border-radius: 999px; transition: width .35s; }
.ready-note { font-size: 11.5px; color: var(--ink-3); margin-top: 7px; }

.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th, .table td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line-2); }
.table th { font-size: 11px; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-3); font-weight: 600; }
.table td.num { text-align: right; font-variant-numeric: tabular-nums; }
.table tr.is-current td { background: color-mix(in srgb, var(--accent) 7%, transparent); }
.table-scroll { overflow-x: auto; }

/* ---- modal --------------------------------------------------------- */

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(10, 14, 20, .55);
  display: flex; align-items: center; justify-content: center; padding: 16px; z-index: 60;
}
/* `display:flex` outranks the user agent's `[hidden] { display:none }`, so the
   closed overlay would otherwise stay up and swallow every click on the page. */
.modal-backdrop[hidden] { display: none; }
.modal {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  max-width: 560px; width: 100%; max-height: 86vh; overflow: auto; padding: 18px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, .3);
}
.modal h2 { margin: 0 0 4px; font-size: 16px; }
.modal p.hint { color: var(--ink-2); font-size: 12.5px; margin: 0 0 14px; }
.field { margin-bottom: 12px; }
.field label { display: block; font-size: 12px; color: var(--ink-2); margin-bottom: 4px; font-weight: 550; }
.field input, .field select, .field textarea {
  width: 100%; padding: 7px 9px; border: 1px solid var(--line); border-radius: 7px;
  background: var(--panel-2); color: var(--ink); font: inherit;
}
.field .help { font-size: 11.5px; color: var(--ink-3); margin-top: 3px; }
.btn {
  background: var(--accent); color: #fff; border: 0; border-radius: 8px;
  padding: 8px 14px; cursor: pointer; font-weight: 550;
}
.btn.ghost { background: none; color: var(--ink-2); border: 1px solid var(--line); }
.btn:hover { filter: brightness(1.06); }
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; flex-wrap: wrap; }

/* ---- footer -------------------------------------------------------- */

.foot {
  position: fixed; bottom: 0; left: 0; right: 0; padding: 6px 16px;
  background: var(--panel); border-top: 1px solid var(--line);
  font-size: 11.5px; color: var(--ink-3); z-index: 18;
}

.empty { padding: 26px 14px; text-align: center; color: var(--ink-3); font-size: 13px; }
.muted { color: var(--ink-3); }
.nowrap { white-space: nowrap; }