/* ==========================================================================
   iCal Edit
   Calm, list-heavy UI: neutral surfaces, one blue accent, green for kept
   and amber/red for filtered-out events. Follows the system light/dark mode.
   ========================================================================== */

:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --surface-2: #f7f8fb;
  --surface-3: #eceff5;
  --border: #dde2ea;
  --border-strong: #c3cad6;
  --text: #1b2230;
  --text-2: #4d5768;
  --text-3: #808a9b;
  --accent: #2f6fde;
  --accent-hover: #2459b8;
  --accent-soft: #e6eefc;
  --on-accent: #ffffff;
  --ok: #1d8a4f;
  --ok-soft: #e3f4ea;
  --warn: #b26a00;
  --warn-soft: #fff1d9;
  --danger: #c23b32;
  --danger-soft: #fde8e6;
  --shadow: 0 1px 2px rgb(20 30 50 / 6%), 0 2px 8px rgb(20 30 50 / 5%);
  --r: 10px;
  --r-sm: 7px;
  --font: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151c;
    --surface: #181d26;
    --surface-2: #1d232e;
    --surface-3: #252c39;
    --border: #2c3442;
    --border-strong: #3c4657;
    --text: #e6eaf1;
    --text-2: #aab3c2;
    --text-3: #7a8495;
    --accent: #6b9cf5;
    --accent-hover: #8ab1f7;
    --accent-soft: #1f2d48;
    --on-accent: #0d1320;
    --ok: #5cc98b;
    --ok-soft: #173326;
    --warn: #f0b252;
    --warn-soft: #3a2c14;
    --danger: #f07a70;
    --danger-soft: #3d1d1b;
    --shadow: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 var(--font);
  -webkit-font-smoothing: antialiased;
}
[hidden] { display: none !important; }
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.25; margin: 0; }
h1 { font-size: 1.5rem; }
h2 { font-size: 1.1rem; }
h3 { font-size: 0.95rem; }
p { margin: 0; }
code, .mono { font-family: var(--mono); font-size: 0.88em; }

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

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.nav a, .nav .link {
  color: var(--text-2);
  text-decoration: none;
  padding: 6px 10px;
  border-radius: var(--r-sm);
  font-size: 0.92rem;
}
.nav a:hover, .nav .link:hover { background: var(--surface-3); color: var(--text); }
.nav a.active { color: var(--accent); background: var(--accent-soft); }

.page { max-width: 1440px; margin: 0 auto; padding: 24px 20px 64px; }
.narrow { max-width: 440px; margin: 40px auto; }
.medium { max-width: 860px; margin: 0 auto; }

.stack { display: flex; flex-direction: column; gap: 16px; }
.stack-sm { display: flex; flex-direction: column; gap: 8px; }
.row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.row.spread { justify-content: space-between; }
.grow { flex: 1 1 auto; min-width: 0; }

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.editor-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: start;
}
@media (min-width: 1100px) {
  .editor-grid { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); }
  .preview-col { position: sticky; top: 72px; }
  .preview-col .card { max-height: calc(100vh - 92px); display: flex; flex-direction: column; }
  .preview-col .preview-list { overflow-y: auto; flex: 1 1 auto; min-height: 0; }
}

/* ------------------------------------------------------------------- cards */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  padding: 18px;
}
.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.card-head p { color: var(--text-2); font-size: 0.9rem; margin-top: 3px; }
.muted { color: var(--text-2); }
.faint { color: var(--text-3); font-size: 0.88rem; }
.small { font-size: 0.86rem; }

/* ------------------------------------------------------------------- forms */

label.field { display: flex; flex-direction: column; gap: 5px; font-size: 0.9rem; color: var(--text-2); }
input[type=text], input[type=password], input[type=url], input[type=number],
input[type=time], input[type=date], select, textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  padding: 7px 10px;
  min-width: 0;
  max-width: 100%;
}
textarea { resize: vertical; min-height: 60px; width: 100%; }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
input[type=number] { width: 80px; }
input.wide, select.wide { width: 100%; }
input.name-input { font-size: 1.35rem; font-weight: 650; padding: 4px 8px; width: min(100%, 520px); }

.check { display: inline-flex; align-items: center; gap: 7px; cursor: pointer; }
.check input { width: 16px; height: 16px; accent-color: var(--accent); }

button, .btn {
  font: inherit;
  font-size: 0.92rem;
  font-weight: 550;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 7px 13px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}
button:hover, .btn:hover { background: var(--surface-3); }
button:disabled { opacity: 0.55; cursor: default; }
button.primary, .btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
button.primary:hover, .btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
button.danger { color: var(--danger); }
button.danger:hover { background: var(--danger-soft); }
button.ghost { border-color: transparent; background: transparent; color: var(--text-2); }
button.ghost:hover { background: var(--surface-3); color: var(--text); }
button.small, .btn.small { padding: 4px 9px; font-size: 0.84rem; }
button.icon { padding: 4px 8px; line-height: 1; }
button.link { border: 0; background: none; padding: 0; color: var(--accent); font-weight: 500; }

.segmented { display: inline-flex; border: 1px solid var(--border-strong); border-radius: var(--r-sm); overflow: hidden; }
.segmented button { border: 0; border-radius: 0; background: var(--surface); }
.segmented button + button { border-left: 1px solid var(--border-strong); }
.segmented button.on { background: var(--accent-soft); color: var(--accent); }

.error-box {
  background: var(--danger-soft);
  color: var(--danger);
  border-radius: var(--r-sm);
  padding: 9px 12px;
  font-size: 0.9rem;
}
.info-box {
  background: var(--accent-soft);
  color: var(--text);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  font-size: 0.9rem;
}

/* -------------------------------------------------------- calendar list */

.cal-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 14px; }
.cal-tile {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-decoration: none;
  color: inherit;
}
.cal-tile:hover { border-color: var(--accent); }
.cal-tile h2 { font-size: 1.05rem; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--surface-3);
  color: var(--text-2);
}
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge.accent { background: var(--accent-soft); color: var(--accent); }

/* ------------------------------------------------------------ rule builder */

.groups { display: flex; flex-direction: column; }
.group {
  border: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: var(--r-sm);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.group-head { display: flex; justify-content: space-between; align-items: center; font-size: 0.82rem; color: var(--text-3); }
.or-sep {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 6px 0;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.or-sep::before, .or-sep::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.cond { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.cond .and {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-3);
  width: 30px;
  text-align: right;
  letter-spacing: 0.04em;
}
.cond select { flex: 0 1 auto; max-width: 175px; }
.cond .value { flex: 1 1 120px; }
.cond > button:last-child { margin-left: auto; }
.days { display: inline-flex; gap: 3px; flex-wrap: wrap; }
.days button { padding: 4px 8px; font-size: 0.82rem; min-width: 34px; justify-content: center; }
.days button.on { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }

.mod {
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.mod-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.mod-num {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 700;
}
.mod-label { font-size: 0.82rem; font-weight: 650; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.04em; }
.params { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }

/* ----------------------------------------------------------------- feeds */

.feed {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
}
.url-box {
  display: flex;
  gap: 6px;
}
.url-box input { flex: 1 1 auto; font-family: var(--mono); font-size: 0.82rem; }

/* --------------------------------------------------------------- preview */

.stats { display: flex; gap: 6px; flex-wrap: wrap; }
.preview-list { margin-top: 10px; display: flex; flex-direction: column; }
.day-head {
  position: sticky;
  top: 0;
  background: var(--surface);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-3);
  padding: 10px 0 4px;
  border-bottom: 1px solid var(--border);
  z-index: 1;
}
.ev {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 10px;
  padding: 7px 0 7px 8px;
  border-left: 3px solid var(--ok);
  border-bottom: 1px solid var(--border);
}
.ev.removed { border-left-color: var(--border-strong); opacity: 0.6; }
.ev.removed .ev-title { text-decoration: line-through; }
.ev.prep { border-left-color: var(--accent); background: var(--accent-soft); }
.ev.prep.removed { opacity: 0.5; }
.ev-time { font-variant-numeric: tabular-nums; font-size: 0.86rem; color: var(--text-2); }
.ev-title { font-weight: 600; font-size: 0.92rem; overflow-wrap: anywhere; }
.ev-sub { font-size: 0.82rem; color: var(--text-2); overflow-wrap: anywhere; }
.ev-tags { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 3px; }
.ev-tags .badge { font-size: 0.72rem; padding: 1px 6px; }
.ev-orig { font-size: 0.78rem; color: var(--text-3); overflow-wrap: anywhere; }

.course {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
}
.course .name { flex: 1 1 auto; min-width: 0; overflow-wrap: anywhere; font-size: 0.9rem; }
.course .count { font-variant-numeric: tabular-nums; font-size: 0.82rem; color: var(--text-2); white-space: nowrap; }

/* ----------------------------------------------------------------- tables */

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { font-size: 0.8rem; color: var(--text-3); font-weight: 650; }
.code { font-family: var(--mono); font-weight: 650; letter-spacing: 0.06em; }
.big-code {
  font-family: var(--mono);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  background: var(--accent-soft);
  color: var(--accent);
  user-select: all;
}

/* ------------------------------------------------------------------ toast */

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: var(--r-sm);
  font-size: 0.9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s, transform 0.18s;
  z-index: 50;
  max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--danger); color: #fff; }

.save-bar {
  position: sticky;
  bottom: 12px;
  z-index: 15;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--r);
  background: var(--text);
  color: var(--bg);
  box-shadow: 0 6px 20px rgb(0 0 0 / 20%);
}
.save-bar button { border-color: transparent; }

@media (max-width: 640px) {
  .page { padding: 16px 16px 64px; }
  .topbar { padding: 10px 16px; }
  .card { padding: 14px; }
  .ev { grid-template-columns: 74px minmax(0, 1fr); }
  .cond .and { width: auto; }
  .url-box { flex-wrap: wrap; }
}