/* 挑战联赛 —— 单文件样式。没有构建步骤，改完刷新即可。 */

:root {
  --bg: #f4f5f9;
  --card: #ffffff;
  --ink: #171a23;
  --muted: #6b7280;
  --line: #e4e6ef;
  --accent: #5551d8;
  --accent-ink: #ffffff;
  --accent-soft: #ecebfc;
  --ok: #0e8f57;
  --ok-soft: #e3f6ec;
  --warn: #b45309;
  --warn-soft: #fdf1df;
  --danger: #c62828;
  --danger-soft: #fdeaea;
  --info: #1d4ed8;
  --info-soft: #e6edfd;
  --radius: 14px;
  --shadow: 0 1px 2px rgb(23 26 35 / 5%), 0 8px 24px -12px rgb(23 26 35 / 12%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101218;
    --card: #171a22;
    --ink: #e8eaf2;
    --muted: #9aa1b2;
    --line: #262a36;
    --accent: #8b87ff;
    --accent-ink: #12131a;
    --accent-soft: #24234a;
    --ok: #4ade80;
    --ok-soft: #12301f;
    --warn: #fbbf24;
    --warn-soft: #33260d;
    --danger: #f87171;
    --danger-soft: #331515;
    --info: #93b4fd;
    --info-soft: #16203a;
    --shadow: 0 1px 2px rgb(0 0 0 / 40%), 0 8px 24px -12px rgb(0 0 0 / 60%);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------------------------------------------------------------- 顶栏 */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.2px;
}
.brand:hover { text-decoration: none; }

.group-pill {
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
}
.group-pill:hover { text-decoration: none; }

.spacer { flex: 1; }

.whoami { color: var(--muted); font-size: 14px; }

.ai-flag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 2px 7px;
  border-radius: 6px;
  background: var(--info-soft);
  color: var(--info);
}

/* ---------------------------------------------------------------- 布局 */

.wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 20px 80px;
}

.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

h1 { font-size: 28px; line-height: 1.25; margin: 0 0 6px; letter-spacing: -0.5px; }
h2 { font-size: 17px; margin: 0; letter-spacing: -0.2px; }
h3 { font-size: 17px; margin: 8px 0 6px; letter-spacing: -0.2px; }

.muted { color: var(--muted); }
.small { font-size: 13px; }
.hint { color: var(--muted); font-size: 12.5px; margin: 8px 0 0; }
.breadcrumb { margin: 0 0 14px; font-size: 14px; color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 20px;
  align-items: start;
}

.col-main { display: grid; gap: 18px; }
.col-side { display: grid; gap: 18px; position: sticky; top: 70px; }

.section-title { margin-bottom: 12px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

/* ---------------------------------------------------------------- 徽章 */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
}
.badge-muted { background: color-mix(in srgb, var(--muted) 12%, transparent); color: var(--muted); }
.badge-ok { background: var(--ok-soft); color: var(--ok); }
.badge-warn { background: var(--warn-soft); color: var(--warn); }
.badge-info { background: var(--info-soft); color: var(--info); }
.badge-done { background: var(--accent-soft); color: var(--accent); }
.badge-danger { background: var(--danger-soft); color: var(--danger); }

.tag {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 5px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 11.5px;
  font-weight: 600;
}
.tag-warn { background: var(--warn-soft); color: var(--warn); }

/* ---------------------------------------------------------------- 挑战卡片 */

.cards { display: grid; gap: 12px; }

.challenge-card {
  display: block;
  color: inherit;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}
.challenge-card:hover {
  text-decoration: none;
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
}
.challenge-card .card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.challenge-card .clamp {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  color: var(--muted);
  font-size: 13.5px;
  margin: 0;
}
.challenge-card .card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}
.mini-cd {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 15px;
  color: var(--accent);
}

.empty {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  color: var(--muted);
}

/* ---------------------------------------------------------------- 倒计时 */

.hero { padding-bottom: 22px; }
.hero-top { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.hero h1 { margin: 0 0 14px; }

.hero-countdown { text-align: left; }

.cd-value {
  font-size: clamp(34px, 7vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -1.5px;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}
.cd-caption { color: var(--muted); font-size: 13px; margin-top: 4px; }
.hero-countdown.is-closed .cd-value { color: var(--muted); font-size: clamp(26px, 5vw, 34px); letter-spacing: -0.5px; }
.hero-countdown.is-idle .cd-value { color: var(--muted); }
.hero-countdown.is-urgent .cd-value { color: var(--danger); animation: pulse 2s ease-in-out infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

.bar {
  height: 6px;
  border-radius: 999px;
  background: var(--line);
  margin-top: 14px;
  overflow: hidden;
}
.bar > i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 55%, #fff));
  transition: width 0.4s ease;
}

/* ---------------------------------------------------------------- 文本 */

.text { white-space: pre-wrap; overflow-wrap: anywhere; }

.prose .text { margin-top: 4px; }

/* ---------------------------------------------------------------- 列表 */

.rubric-list, .rules, .ranking { list-style: none; margin: 0; padding: 0; }
.rubric-list li, .ranking li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}
.rubric-list li:last-child, .ranking li:last-child { border-bottom: 0; }
.rubric-list b { margin-left: auto; color: var(--muted); font-weight: 600; }
.rules li { font-size: 13.5px; color: var(--muted); padding: 4px 0 4px 14px; position: relative; }
.rules li::before { content: "·"; position: absolute; left: 2px; }

.ranking li .rank { width: 20px; color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.ranking li .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ranking li .score { font-weight: 700; font-variant-numeric: tabular-nums; }
.ranking li.me { color: var(--accent); font-weight: 600; }
.ranking li.me .rank { color: var(--accent); }

.file-list { list-style: none; padding: 0; margin: 10px 0 0; display: grid; gap: 4px; }
.file-list li { font-size: 13.5px; display: flex; gap: 8px; align-items: baseline; }

/* ---------------------------------------------------------------- 提交 / 评审 */

.submission {
  border-top: 1px solid var(--line);
  padding: 16px 0;
  display: grid;
  gap: 10px;
}
.submission:first-of-type { border-top: 0; padding-top: 4px; }
.sub-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.sub-head .who { font-weight: 700; }

.review {
  border: 1px solid var(--line);
  border-left: 3px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  display: grid;
  gap: 6px;
}
.review-confirmed { border-left-color: var(--ok); }
.review-suggested { border-left-color: var(--info); }
.review-rejected, .review-failed { opacity: 0.6; }
.review-head { display: flex; align-items: center; gap: 10px; }
.review-kind { font-size: 12px; font-weight: 700; color: var(--muted); letter-spacing: 0.3px; }
.review-kind.is-ai { color: var(--info); }
.review-total { font-size: 20px; font-weight: 800; font-variant-numeric: tabular-nums; }
.review-head .badge { margin-left: auto; }

.review-form {
  display: grid;
  gap: 10px;
  border: 1px dashed color-mix(in srgb, var(--accent) 40%, var(--line));
  border-radius: 10px;
  padding: 14px;
  background: color-mix(in srgb, var(--accent-soft) 45%, transparent);
}
.dims { display: flex; flex-wrap: wrap; gap: 12px; }
.dim { display: flex; align-items: center; gap: 6px; font-size: 13px; }
.dim select { width: auto; padding: 4px 8px; }

.admin-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0; }
.owner-panel { border-style: dashed; }

/* ---------------------------------------------------------------- 表单 */

.stack { display: grid; gap: 14px; }

label { display: grid; gap: 6px; font-size: 13.5px; font-weight: 600; color: var(--ink); }

input, textarea, select {
  font: inherit;
  font-weight: 400;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 9px 11px;
  width: 100%;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
textarea { resize: vertical; min-height: 90px; }

.field-row { display: grid; grid-template-columns: 1fr 140px; gap: 14px; }

.rubric-editor {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  margin: 0;
  display: grid;
  gap: 10px;
}
.rubric-editor legend { font-size: 13px; font-weight: 700; padding: 0 6px; }
.rubric-row { display: flex; align-items: center; gap: 10px; }
.rubric-label { flex: 1; font-size: 14px; }
.rubric-row input.w { width: 72px; text-align: right; }
.rubric-row .share {
  width: 58px;
  text-align: right;
  font-size: 12.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}
.inline-label { display: flex; align-items: center; gap: 8px; font-weight: 400; }
.inline-label select { width: 72px; }

.form-actions { display: flex; align-items: center; justify-content: flex-end; gap: 12px; margin-top: 4px; }

.form-card { max-width: 720px; display: grid; gap: 16px; }

/* ---------------------------------------------------------------- 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 9px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  font: inherit;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: transform 0.1s ease, background 0.12s ease, border-color 0.12s ease;
}
.btn:hover { text-decoration: none; border-color: color-mix(in srgb, var(--ink) 25%, var(--line)); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, #000); border-color: transparent; }
.btn-small { padding: 6px 12px; font-size: 13px; border-radius: 8px; }

.link {
  border: 0;
  background: none;
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  padding: 0;
}
.link:hover { color: var(--ink); text-decoration: underline; }

.inline { display: inline; }

/* ---------------------------------------------------------------- 提示条 */

.banner {
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 14px;
  margin-bottom: 16px;
  border: 1px solid transparent;
}
.banner-ok { background: var(--ok-soft); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 22%, transparent); }
.banner-error { background: var(--danger-soft); color: var(--danger); border-color: color-mix(in srgb, var(--danger) 22%, transparent); }

.warn-text { color: var(--warn); }
.delta-pos { color: var(--ok); font-weight: 700; font-variant-numeric: tabular-nums; }
.delta-neg { color: var(--danger); font-weight: 700; font-variant-numeric: tabular-nums; }

.invite {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  letter-spacing: 1px;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 1px 7px;
  border-radius: 5px;
  font-size: 13px;
}

/* ---------------------------------------------------------------- 表格 */

.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--line); }
.table th { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.4px; }
.table td:first-child { width: 60px; color: var(--muted); }

/* ---------------------------------------------------------------- 登录 */

.auth-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(1000px 500px at 15% -10%, color-mix(in srgb, var(--accent) 16%, transparent), transparent 60%),
    radial-gradient(800px 400px at 110% 10%, color-mix(in srgb, var(--info) 12%, transparent), transparent 55%),
    var(--bg);
}

.auth-card {
  display: grid;
  grid-template-columns: 0.9fr 1fr;
  width: min(880px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 30px 60px -30px rgb(23 26 35 / 35%);
}

.auth-side {
  padding: 38px 32px;
  background: linear-gradient(160deg, color-mix(in srgb, var(--accent) 90%, #000), var(--accent));
  color: #fff;
  display: grid;
  align-content: center;
  gap: 10px;
}
.auth-logo { font-size: 34px; line-height: 1; }
.auth-side h1 { color: #fff; margin: 6px 0 4px; }
.auth-side p { margin: 0; opacity: 0.85; font-size: 14px; }
.auth-points { list-style: none; padding: 12px 0 0; margin: 0; display: grid; gap: 7px; font-size: 13px; opacity: 0.9; }
.auth-points li::before { content: "→ "; opacity: 0.7; }

.auth-main { padding: 38px 34px; display: grid; align-content: center; gap: 14px; }
.auth-main h2 { font-size: 21px; }
.switch { margin: 4px 0 0; font-size: 13.5px; color: var(--muted); }

.error-card { display: block; padding: 40px; text-align: center; }
.error-card h1 { font-size: 48px; color: var(--muted); }

/* ---------------------------------------------------------------- 管理面板 */

.nav-link {
  font-size: 14px;
  color: var(--muted);
  padding: 3px 9px;
  border-radius: 7px;
}
.nav-link:hover {
  color: var(--ink);
  background: var(--line);
  text-decoration: none;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}
.stat { padding: 14px 18px; display: grid; gap: 2px; }
.stat-value {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.6px;
  font-variant-numeric: tabular-nums;
}
.stat-label { color: var(--muted); font-size: 12.5px; }

.tabs { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 14px; }
.tab {
  padding: 6px 13px;
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--muted);
  border: 1px solid transparent;
}
.tab:hover { background: var(--card); text-decoration: none; }
.tab.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.table-card { padding: 4px; }
.table-wrap { overflow-x: auto; }
.admin-table th { padding: 12px 10px 8px; }
.admin-table td { vertical-align: top; padding: 11px 10px; }
.admin-table .num { text-align: right; font-variant-numeric: tabular-nums; }
.admin-table .actions { display: flex; flex-wrap: wrap; gap: 6px; }

.template-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(258px, 1fr));
  gap: 14px;
}
.template-card { display: flex; flex-direction: column; gap: 8px; }
.template-card h3 { margin: 2px 0 0; }
.template-card .card-foot {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.template-card .clamp {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin: 0;
}
.blank-card { border-style: dashed; }

.chips { display: flex; flex-wrap: wrap; gap: 5px; }
.chip {
  font-size: 11.5px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg);
  border: 1px solid var(--line);
  color: var(--muted);
}

.template-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  padding: 13px 18px;
  background: var(--accent-soft);
  border-color: transparent;
}
.template-banner b { margin: 0 6px; }

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 860px) {
  .grid { grid-template-columns: 1fr; }
  .col-side { position: static; }
  .auth-card { grid-template-columns: 1fr; }
  .auth-side { padding: 26px; }
  .auth-points { display: none; }
  .field-row { grid-template-columns: 1fr; }
  h1 { font-size: 23px; }
  .wrap { padding: 20px 14px 60px; }
  .topbar { padding: 10px 14px; }
  .whoami { display: none; }
  .stat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .admin-table .actions { flex-direction: column; align-items: stretch; }
}