/* ============================================================
   CTF 赛事日历 — 样式
   零依赖，纯 CSS，支持暗/亮主题
   ============================================================ */

:root {
  --bg: #0b0f19;
  --bg-soft: #111726;
  --panel: rgba(19, 26, 43, 0.82);
  --panel-border: rgba(120, 160, 255, 0.14);
  --text: #e8edf7;
  --text-dim: #9aa8c2;
  --text-mute: #6b7a95;
  --accent: #4d8dff;
  --accent-2: #22d3a7;
  --warn: #ffb020;
  --danger: #ff5c72;
  --purple: #a78bfa;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --radius: 14px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

html[data-theme="light"] {
  --bg: #f4f6fb;
  --bg-soft: #ffffff;
  --panel: rgba(255, 255, 255, 0.9);
  --panel-border: rgba(20, 50, 120, 0.12);
  --text: #101828;
  --text-dim: #54607a;
  --text-mute: #8b96ad;
  --accent: #2563eb;
  --accent-2: #0d9488;
  --warn: #b45309;
  --danger: #dc2626;
  --purple: #7c3aed;
  --shadow: 0 8px 24px rgba(16, 24, 40, 0.1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(77, 141, 255, 0.16), transparent 60%),
    radial-gradient(700px 420px at 90% 0%, rgba(34, 211, 167, 0.10), transparent 60%);
}

.app {
  position: relative;
  z-index: 1;
  max-width: 1240px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

/* ---------------- Hero ---------------- */
.hero { position: relative; margin-bottom: 22px; }
.hero-glow {
  position: absolute; inset: -40px -20px auto -20px; height: 200px;
  background: radial-gradient(600px 160px at 20% 0%, rgba(77, 141, 255, 0.22), transparent 70%);
  filter: blur(12px); pointer-events: none;
}
.hero-inner { position: relative; }
.hero-top { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.hero h1 {
  margin: 0; font-size: 30px; font-weight: 800; letter-spacing: -0.5px;
  background: linear-gradient(92deg, var(--text), var(--accent) 130%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.year-badge {
  -webkit-text-fill-color: initial; color: var(--accent);
  border: 1px solid var(--panel-border); background: var(--panel);
  padding: 2px 12px; border-radius: 999px; font-size: 15px; font-weight: 700;
  vertical-align: middle;
}
.hero-actions { margin-left: auto; display: flex; gap: 8px; }
.hero-sub { margin: 8px 0 16px; color: var(--text-dim); font-size: 14px; }
.hero-sub a { color: var(--accent); text-decoration: none; }
.hero-sub a:hover { text-decoration: underline; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(128px, 1fr)); gap: 10px; }
.stat {
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: 12px; padding: 10px 14px; backdrop-filter: blur(8px);
}
.stat-num { font-size: 22px; font-weight: 800; font-variant-numeric: tabular-nums; }
.stat-lbl { font-size: 12px; color: var(--text-mute); }
.stat.s-ongoing .stat-num { color: var(--accent-2); }
.stat.s-upcoming .stat-num { color: var(--accent); }
.stat.s-ended .stat-num { color: var(--text-mute); }
.stat.s-reg .stat-num { color: var(--warn); }
.stat.s-tbd .stat-num { color: var(--purple); }

/* ---------------- Panel / 检索区 ---------------- */
.panel {
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: var(--radius); padding: 16px; backdrop-filter: blur(10px);
  box-shadow: var(--shadow); margin-bottom: 22px;
  position: sticky; top: 0; z-index: 20;
}
.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: flex-end; }
.row + .row { margin-top: 12px; }
.row-chips { align-items: center; justify-content: space-between; gap: 14px; }
.row-foot {
  align-items: center; justify-content: space-between;
  border-top: 1px solid var(--panel-border); padding-top: 12px; margin-top: 14px;
}

.field { display: flex; flex-direction: column; gap: 5px; min-width: 150px; }
.field.grow { flex: 1 1 420px; }
.field label { font-size: 12px; color: var(--text-mute); font-weight: 600; letter-spacing: .3px; }

input[type="search"], input[type="date"], select {
  background: var(--bg-soft); color: var(--text);
  border: 1px solid var(--panel-border); border-radius: 10px;
  padding: 9px 11px; font-size: 14px; font-family: inherit; outline: none;
  transition: border-color .15s, box-shadow .15s; width: 100%;
}
input[type="search"]:focus, input[type="date"]:focus, select:focus {
  border-color: var(--accent); box-shadow: 0 0 0 3px rgba(77, 141, 255, 0.16);
}
html[data-theme="light"] input, html[data-theme="light"] select { background: #fff; }

.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap .ic {
  position: absolute; left: 11px; width: 16px; height: 16px;
  fill: var(--text-mute); pointer-events: none;
}
.input-wrap input { padding-left: 34px; padding-right: 32px; }
.input-wrap .clear {
  position: absolute; right: 8px; border: none; background: transparent;
  color: var(--text-mute); font-size: 20px; line-height: 1; cursor: pointer; padding: 2px 6px;
  border-radius: 6px;
}
.input-wrap .clear:hover { color: var(--danger); background: rgba(255, 92, 114, .1); }

.hint { font-size: 11.5px; color: var(--text-mute); }
.hint code {
  font-family: var(--mono); background: rgba(120, 160, 255, .12);
  padding: 1px 5px; border-radius: 4px; color: var(--accent);
}

/* chips */
.chips { display: flex; gap: 7px; flex-wrap: wrap; align-items: center; }
.chips-label { font-size: 12px; color: var(--text-mute); font-weight: 600; margin-right: 2px; }
.chip {
  border: 1px solid var(--panel-border); background: var(--bg-soft); color: var(--text-dim);
  padding: 5px 13px; border-radius: 999px; font-size: 13px; cursor: pointer;
  transition: all .15s; font-family: inherit;
}
.chip:hover { border-color: var(--accent); color: var(--text); }
.chip.on { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

.quick { display: flex; gap: 6px; flex-wrap: wrap; }

/* buttons */
.btn {
  background: var(--accent); color: #fff; border: 1px solid transparent;
  border-radius: 10px; padding: 9px 15px; font-size: 14px; font-weight: 600;
  cursor: pointer; font-family: inherit; transition: filter .15s, border-color .15s, color .15s;
}
.btn:hover { filter: brightness(1.1); }
.btn.ghost { background: var(--bg-soft); color: var(--text-dim); border-color: var(--panel-border); font-weight: 500; }
.btn.ghost:hover { color: var(--text); border-color: var(--accent); }
.btn.tiny { padding: 6px 11px; font-size: 12.5px; background: var(--bg-soft); color: var(--text-dim); border-color: var(--panel-border); font-weight: 500; }
.btn.tiny:hover { color: var(--text); border-color: var(--accent); }

.result-count { font-size: 13.5px; color: var(--text-dim); }
.result-count strong { color: var(--accent); font-size: 17px; font-variant-numeric: tabular-nums; }
.active-filters { color: var(--text-mute); font-size: 12.5px; }
.tools { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------------- 列表 ---------------- */
.list { display: flex; flex-direction: column; gap: 26px; }
.month-group { display: flex; flex-direction: column; gap: 12px; }
.month-head {
  display: flex; align-items: center; gap: 12px;
  font-size: 15px; font-weight: 700; color: var(--text-dim);
  position: sticky; top: 0; z-index: 5; padding: 6px 0;
  background: linear-gradient(var(--bg) 70%, transparent);
}
.month-head .line { flex: 1; height: 1px; background: var(--panel-border); }
.month-head .mcount { font-size: 12px; color: var(--text-mute); font-weight: 500; }

.card {
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: var(--radius); padding: 15px 17px; transition: border-color .18s, transform .18s;
  border-left: 3px solid var(--panel-border);
}
.card:hover { border-color: rgba(77, 141, 255, .4); transform: translateY(-1px); }
.card.is-ended { opacity: .62; }
.card.is-ended:hover { opacity: .85; }
.card.is-ongoing { border-left-color: var(--accent-2); box-shadow: 0 0 0 1px rgba(34, 211, 167, .18); }
.card.is-reg-open { border-left-color: var(--warn); }
.card.is-upcoming { border-left-color: var(--accent); }
.card.is-tbd { border-left-color: var(--purple); }

.card-head { display: flex; gap: 14px; align-items: flex-start; justify-content: space-between; flex-wrap: wrap; }
.card-title-wrap { min-width: 0; flex: 1 1 340px; }
.card-title { margin: 0 0 4px; font-size: 16.5px; font-weight: 700; line-height: 1.35; }
.card-meta { font-size: 12.5px; color: var(--text-mute); display: flex; gap: 10px; flex-wrap: wrap; }
.card-meta .sep { color: var(--panel-border); }
.card-badges { display: flex; gap: 7px; flex-wrap: wrap; align-items: center; }

.badge {
  font-size: 12px; font-weight: 600; padding: 3px 11px; border-radius: 999px;
  border: 1px solid; white-space: nowrap;
}
.badge.status.ongoing { color: var(--accent-2); border-color: rgba(34, 211, 167, .45); background: rgba(34, 211, 167, .12); }
.badge.status.ended { color: var(--text-mute); border-color: var(--panel-border); background: var(--bg-soft); }
.badge.status.upcoming { color: var(--accent); border-color: rgba(77, 141, 255, .45); background: rgba(77, 141, 255, .12); }
.badge.status.reg-open { color: var(--warn); border-color: rgba(255, 176, 32, .45); background: rgba(255, 176, 32, .12); }
.badge.status.tbd { color: var(--purple); border-color: rgba(167, 139, 250, .45); background: rgba(167, 139, 250, .12); }
.badge.reg.open { color: var(--warn); border-color: rgba(255, 176, 32, .35); background: transparent; }
.badge.reg.closed { color: var(--text-mute); border-color: var(--panel-border); background: transparent; }
.badge.reg.unknown { color: var(--purple); border-color: rgba(167, 139, 250, .3); background: transparent; }
.badge.reg.notopen { color: var(--accent); border-color: rgba(77, 141, 255, .35); background: transparent; }
.badge.cat { color: var(--text-dim); border-color: var(--panel-border); background: transparent; font-weight: 500; }
.badge.cat.college { color: var(--purple); border-color: rgba(167, 139, 250, .4); }

.card-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: 9px; margin-top: 13px;
}
.slot {
  background: var(--bg-soft); border: 1px solid var(--panel-border);
  border-radius: 10px; padding: 8px 11px; display: flex; flex-direction: column; gap: 2px;
}
.slot-label { font-size: 11px; color: var(--text-mute); font-weight: 600; letter-spacing: .3px; }
.slot-value { font-size: 13.5px; font-weight: 600; font-variant-numeric: tabular-nums; }
.slot-value.na { color: var(--text-mute); font-weight: 500; font-style: italic; }
.slot-value.derived { color: var(--purple); }
.slot-value.derived::after {
  content: "推定"; font-size: 10px; font-weight: 600; margin-left: 5px;
  border: 1px dashed rgba(167, 139, 250, .55); border-radius: 4px; padding: 0 4px;
  vertical-align: 1px;
}
.slot-value em { font-style: normal; color: var(--text-mute); font-size: 11.5px; font-weight: 500; display: block; }

.countdown { margin-top: 11px; font-size: 13px; color: var(--text-dim); }
.countdown .cd { color: var(--accent-2); font-weight: 700; font-variant-numeric: tabular-nums; }
.countdown .cd.past { color: var(--text-mute); font-weight: 500; }
.countdown .cd.soon { color: var(--warn); }

.more { margin-top: 11px; border-top: 1px dashed var(--panel-border); padding-top: 9px; }
.more summary {
  cursor: pointer; font-size: 12.5px; color: var(--accent); font-weight: 600;
  list-style: none; user-select: none;
}
.more summary::-webkit-details-marker { display: none; }
.more summary::before { content: "▸ "; }
.more[open] summary::before { content: "▾ "; }
.more-body { margin-top: 9px; font-size: 13px; color: var(--text-dim); display: flex; flex-direction: column; gap: 7px; }
.more-body .kv { display: flex; gap: 8px; flex-wrap: wrap; }
.more-body .k { color: var(--text-mute); min-width: 68px; font-size: 12.5px; }
.more-body .v { flex: 1 1 300px; word-break: break-word; }
.more-body a { color: var(--accent); text-decoration: none; word-break: break-all; }
.more-body a:hover { text-decoration: underline; }
.more-body .conf { font-size: 11.5px; padding: 1px 8px; border-radius: 999px; border: 1px solid var(--panel-border); }
.more-body .conf.high { color: var(--accent-2); border-color: rgba(34, 211, 167, .4); }
.more-body .conf.medium { color: var(--warn); border-color: rgba(255, 176, 32, .4); }
.more-body .conf.low { color: var(--danger); border-color: rgba(255, 92, 114, .4); }
.more-body blockquote {
  margin: 0; padding: 7px 11px; border-left: 2px solid var(--panel-border);
  background: var(--bg-soft); border-radius: 0 8px 8px 0; font-size: 12.5px; color: var(--text-mute);
}

.empty { text-align: center; padding: 70px 20px; color: var(--text-dim); }
.empty-ico { font-size: 44px; margin-bottom: 8px; }
.empty h2 { margin: 0 0 6px; font-size: 19px; color: var(--text); }
.empty p { margin: 0 0 18px; font-size: 14px; }

.foot { margin-top: 46px; padding-top: 20px; border-top: 1px solid var(--panel-border); font-size: 12.5px; color: var(--text-mute); }
.foot p { margin: 0 0 7px; }
.foot a { color: var(--accent); text-decoration: none; }
.foot a:hover { text-decoration: underline; }
.foot .muted { color: var(--text-mute); opacity: .82; }

@media (max-width: 720px) {
  .app { padding: 18px 13px 44px; }
  .hero h1 { font-size: 23px; }
  .panel { position: static; padding: 13px; }
  .field { min-width: 100%; }
  .row-chips { flex-direction: column; align-items: stretch; }
  .card-grid { grid-template-columns: repeat(auto-fit, minmax(132px, 1fr)); }
  .hero-actions { margin-left: 0; width: 100%; }
}

@media print {
  .panel, .hero-actions, .foot { display: none; }
  body { background: #fff; color: #000; }
}