:root {
  --bg: #f4f6f9;
  --card: #ffffff;
  --text: #1d2733;
  --muted: #6a7686;
  --line: #e1e6ec;
  --accent: #2f5d8a;
  --accent-soft: #e5eef7;
  --ok: #2e7d4f;
  --ok-soft: #e3f3e9;
  --warn: #a35a00;
  --warn-soft: #fdf0dc;
  --danger: #b3261e;
  --danger-soft: #fbe5e3;
  --test: #6b3fa0;
  --test-soft: #f0e9f8;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12171d;
    --card: #1b222b;
    --text: #e6ebf0;
    --muted: #94a0ae;
    --line: #2b3440;
    --accent: #7fb0e0;
    --accent-soft: #1f3247;
    --ok: #6fcf97;
    --ok-soft: #173225;
    --warn: #f0b35a;
    --warn-soft: #3a2a12;
    --danger: #f28b82;
    --danger-soft: #3d1c1a;
    --test: #c3a2ea;
    --test-soft: #2c2140;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
}
button, input, select { font: inherit; color: inherit; }

.top {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: calc(10px + env(safe-area-inset-top)) 16px 10px;
  background: var(--accent); color: #fff;
}
.top h1 { font-size: 1.15rem; margin: 0; }
.top .ghost { color: #fff; border-color: rgba(255, 255, 255, .5); }

nav#tabs {
  display: flex; gap: 4px; overflow-x: auto;
  padding: 8px 12px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 1;
}
nav#tabs button {
  border: 0; background: none; padding: 6px 12px; border-radius: 999px; white-space: nowrap; cursor: pointer;
}
nav#tabs button.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

main { max-width: 720px; margin: 0 auto; padding: 12px 16px 48px; }
h2 { font-size: 1.05rem; margin: 20px 0 8px; }
h2 .sub { color: var(--muted); font-weight: normal; font-size: .9rem; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px; margin: 8px 0;
}
.banner { border-radius: 10px; padding: 10px 12px; margin: 8px 0; font-size: .92rem; }
.banner.warn { background: var(--warn-soft); color: var(--warn); }
.banner.danger { background: var(--danger-soft); color: var(--danger); }
.banner.info { background: var(--accent-soft); color: var(--accent); }

.task { display: grid; grid-template-columns: 1fr auto; gap: 4px 10px; align-items: start; }
.task + .task { border-top: 1px solid var(--line); padding-top: 10px; margin-top: 10px; }
.task .meta { font-size: .82rem; color: var(--muted); display: flex; flex-wrap: wrap; gap: 4px 10px; }
.task .subject { font-weight: 600; }
.task .title { overflow-wrap: anywhere; }
.task.done .title { text-decoration: line-through; color: var(--muted); }
.task .full { grid-column: 1 / -1; }
.task .actions { display: flex; flex-direction: column; gap: 6px; }

.subject .badge { margin-left: 6px; vertical-align: middle; }
.badge { display: inline-block; font-size: .75rem; padding: 1px 8px; border-radius: 999px; font-weight: 600; }
.badge.late { background: var(--warn-soft); color: var(--warn); }
.badge.revision { background: var(--test-soft); color: var(--test); }
.badge.slot { background: var(--accent-soft); color: var(--accent); }

button.primary, button.ok, button.ghost, button.danger {
  border-radius: 8px; padding: 6px 12px; cursor: pointer; border: 1px solid transparent; min-height: 36px;
}
button.primary { background: var(--accent); color: #fff; }
button.ok { background: var(--ok); color: #fff; }
button.ghost { background: transparent; border-color: var(--line); }
button.danger { background: var(--danger-soft); color: var(--danger); }
button:disabled { opacity: .5; cursor: default; }

.day-total { float: right; font-size: .85rem; color: var(--muted); font-weight: normal; }
.reminder { font-size: .9rem; padding: 6px 0; }

.test { display: flex; gap: 10px; align-items: baseline; padding: 6px 0; }
.test + .test { border-top: 1px solid var(--line); }
.test .date { font-weight: 600; color: var(--test); white-space: nowrap; }

form.login { max-width: 360px; margin: 48px auto; }
label { display: block; margin: 10px 0 4px; font-size: .9rem; color: var(--muted); }
input[type=text], input[type=password], input[type=number], input[type=time], input[type=date], select {
  width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--card);
}
input[type=number] { max-width: 6.5em; }
input[type=time] { max-width: 8em; }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: end; }
.row > * { flex: 0 1 auto; }
.row label { margin-top: 6px; }
fieldset { border: 1px solid var(--line); border-radius: 12px; margin: 12px 0; padding: 8px 12px 12px; background: var(--card); }
legend { font-weight: 600; padding: 0 4px; }
.days { display: flex; flex-wrap: wrap; gap: 6px; }
.days label { display: flex; align-items: center; gap: 4px; margin: 0; color: var(--text); }

.hw { display: grid; gap: 6px; }
.hw .desc { font-size: .92rem; overflow-wrap: anywhere; white-space: pre-line; }
.hw.ignored .desc { color: var(--muted); text-decoration: line-through; }

#toast {
  position: fixed; left: 50%; bottom: calc(16px + env(safe-area-inset-bottom)); transform: translateX(-50%);
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 10px; max-width: calc(100% - 32px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
}

/* Notifications */
.notif { margin-top: 16px; }
.notif .actions { display: flex; gap: 8px; }