:root {
  --bg: #070709;
  --bg-elev: #121218;
  --bg-card: rgba(22, 22, 28, 0.86);
  --line: rgba(255, 255, 255, 0.08);
  --text: #f4f4f6;
  --muted: #9a9aa8;
  --pink: #fe2c55;
  --cyan: #25f4ee;
  --gold: #ffd666;
  --silver: #d0d5dd;
  --bronze: #e0a078;
  --new: #25f4ee;
  --hot: #fe2c55;
  --burst: #ff7a1a;
  --boil: #ff3b3b;
  --live: #fe2c55;
  --chal: #b47aff;
  --ok: #3dd68c;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
  --radius: 18px;
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(37, 244, 238, 0.08), transparent 50%),
    radial-gradient(900px 500px at 110% 0%, rgba(254, 44, 85, 0.12), transparent 45%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button, input { font-family: inherit; }

/* ---------- login ---------- */
.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 20px;
}
.login-card {
  width: min(420px, 100%);
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 36px 32px 28px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.logo-mark {
  width: 42px; height: 42px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--cyan), var(--pink));
  position: relative;
  box-shadow: 0 0 0 3px rgba(254, 44, 85, 0.15);
}
.logo-mark::after {
  content: "";
  position: absolute;
  inset: 10px 12px 10px 14px;
  border: 3px solid #fff;
  border-radius: 40% 50% 50% 45%;
  border-left-color: transparent;
  transform: rotate(-20deg);
}
.brand h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.04em;
}
.sub {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 28px;
}
label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin: 0 0 8px;
}
.field { margin-bottom: 16px; }
input[type="text"], input[type="password"] {
  width: 100%;
  background: #0c0c11;
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 15px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
input:focus {
  border-color: rgba(37, 244, 238, 0.6);
  box-shadow: 0 0 0 3px rgba(37, 244, 238, 0.12);
}
.btn {
  width: 100%;
  border: 0;
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 650;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(90deg, #25f4ee 0%, #fe2c55 100%);
  background-size: 160% 100%;
  background-position: 30% 0;
  transition: transform .12s ease, filter .12s ease, background-position .3s;
}
.btn:hover { background-position: 80% 0; filter: brightness(1.05); }
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.6; cursor: wait; }
.err {
  color: #ff6b7a;
  font-size: 13px;
  min-height: 20px;
  margin: 10px 0 0;
}
.foot-note {
  margin-top: 22px;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
}

/* ---------- board ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 22px;
  background: rgba(7, 7, 9, 0.78);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.topbar .brand { margin: 0; }
.topbar .brand h1 { font-size: 18px; }
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  color: var(--muted);
  font-size: 13px;
  margin-left: 8px;
  flex: 1;
}
.dot-ok {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 8px var(--ok);
  display: inline-block;
  margin-right: 6px;
}
.dot-stale { background: #ffb020; box-shadow: 0 0 8px #ffb020; }
.actions { display: flex; gap: 8px; align-items: center; }
.search {
  background: #0c0c11;
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  min-width: 180px;
  font-size: 13px;
  outline: none;
}
.search:focus { border-color: rgba(37, 244, 238, 0.5); }
.linkish {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 999px;
  padding: 7px 12px;
  cursor: pointer;
  font-size: 13px;
}
.linkish:hover { color: var(--text); border-color: rgba(255,255,255,.2); }

.wrap { width: min(920px, calc(100% - 28px)); margin: 20px auto 60px; }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}
.stat {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
}
.stat b { display: block; font-size: 20px; margin-top: 4px; }
.stat span { color: var(--muted); font-size: 12px; }

.list {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.row {
  display: grid;
  grid-template-columns: 52px 64px minmax(0, 1fr) 118px;
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  transition: background .15s;
}
.row:first-child { border-top: 0; }
.row:hover { background: rgba(255,255,255,0.03); }
.row.hl {
  background: rgba(254, 44, 85, 0.14);
  box-shadow: inset 0 0 0 2px #fe2c55, 0 0 16px rgba(254, 44, 85, 0.28);
  z-index: 1;
}
.rank {
  font-weight: 800;
  font-size: 20px;
  text-align: center;
  font-variant-numeric: tabular-nums;
  color: #6d6d7a;
}
.rank.r1 { color: var(--gold); text-shadow: 0 0 12px rgba(255, 214, 102, 0.35); }
.rank.r2 { color: var(--silver); }
.rank.r3 { color: var(--bronze); }
.cover {
  width: 64px; height: 64px;
  border-radius: 12px;
  object-fit: cover;
  background: #1a1a22;
  border: 1px solid var(--line);
}
.cover.ph {
  display: grid; place-items: center;
  color: #3a3a48;
  font-size: 11px;
}
.title-block { min-width: 0; }
.title {
  font-size: 16px;
  font-weight: 650;
  line-height: 1.35;
  display: inline;
}
.title:hover { color: var(--cyan); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; align-items: center; }
.badge {
  font-size: 11px;
  font-weight: 700;
  border-radius: 999px;
  padding: 1px 7px;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
}
.badge.新 { color: #081416; background: var(--cyan); }
.badge.热 { color: #fff; background: var(--hot); }
.badge.爆 { color: #fff; background: var(--burst); }
.badge.沸 { color: #fff; background: linear-gradient(90deg, #ff3b3b, #ff7a1a); }
.badge.直播 { color: #fff; background: #fe2c55; }
.badge.挑战 { color: #fff; background: #7b5cff; }
.badge.热点, .badge.娱乐, .badge.荐 { color: #d8fff9; background: rgba(37,244,238,.16); border-color: rgba(37,244,238,.3); }
.delta {
  font-size: 12px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}
.delta.up { color: #ff5a6a; }
.delta.down { color: #3dd68c; }
.delta.flat { color: #6d6d7a; }
.delta.new { color: var(--cyan); }
.heat { margin-top: 8px; }
.bar {
  height: 5px;
  background: rgba(255,255,255,0.06);
  border-radius: 99px;
  overflow: hidden;
}
.bar > i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), var(--pink));
  width: 0;
  transition: width .6s ease;
}
.metrics {
  text-align: right;
}
.hotv {
  font-size: 15px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: #ffd0d8;
}
.views { color: var(--muted); font-size: 12px; margin-top: 4px; }

.empty, .banner {
  padding: 28px 16px;
  text-align: center;
  color: var(--muted);
}
.banner.warn { color: #ffb020; }

@media (max-width: 680px) {
  .topbar { flex-wrap: wrap; padding: 12px 14px; gap: 10px; }
  .meta { margin-left: 0; width: 100%; font-size: 12px; }
  .search { min-width: 0; flex: 1; }
  .actions { flex-wrap: wrap; width: 100%; }
  .stats { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
  .stat { padding: 10px; }
  .stat b { font-size: 16px; }
  .row {
    grid-template-columns: 36px 52px minmax(0, 1fr);
    gap: 8px;
    padding: 10px 12px;
  }
  .metrics { display: none; }
  .rank { font-size: 16px; }
  .cover, .cover.ph { width: 52px; height: 52px; border-radius: 10px; }
  .title { font-size: 15px; }
  .wrap { width: calc(100% - 16px); margin-top: 12px; }
}

.sound-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 999px;
  padding: 7px 12px;
  cursor: pointer;
  font-size: 13px;
  user-select: none;
  white-space: nowrap;
}
.sound-toggle:hover { color: var(--text); border-color: rgba(255,255,255,.2); }
.sound-toggle input { accent-color: #fe2c55; margin: 0; }
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 40;
  max-width: min(560px, calc(100% - 24px));
  background: rgba(20, 12, 16, 0.94);
  border: 1px solid rgba(254, 44, 85, 0.45);
  color: var(--text);
  border-radius: 14px;
  padding: 12px 16px;
  font-size: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.4);
}
.toast b { color: #ff8aa0; }