/* ==========================================================================
   SWUCPC · 西南大学 ICPC 训练平台
   ========================================================================== */

:root {
  --bg: #070b14;
  --bg-soft: #0b1220;
  --card: #101a2e;
  --card-2: #142039;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.26);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --dim: #64748b;
  --accent: #4ade80;
  --accent-2: #22d3ee;
  --blue: #60a5fa;
  --purple: #c084fc;
  --orange: #fb923c;
  --red: #f87171;
  --amber: #fbbf24;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 18px 50px rgba(2, 6, 23, 0.45);
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(900px 600px at 12% -10%, rgba(74, 222, 128, 0.09), transparent 60%),
    radial-gradient(800px 500px at 88% 0%, rgba(96, 165, 250, 0.10), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { color: #67e8f9; }

h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0 0 10px; }
ul { margin: 0; padding-left: 18px; }
canvas { max-width: 100%; }

.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.unit { font-size: 0.55em; color: var(--muted); font-weight: 500; }
.center { text-align: center; }
.num { text-align: right; font-variant-numeric: tabular-nums; }
.text-link { color: var(--accent-2); }
.text-link.subtle { color: var(--muted); }
.text-warn { color: var(--amber); }
.hidden { display: none !important; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 11, 20, 0.82);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
}
.nav-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 22px;
  height: 62px;
  display: flex;
  align-items: center;
  gap: 26px;
}
.brand {
  display: inline-flex;
  align-items: baseline;
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.03em;
  color: var(--text);
  white-space: nowrap;
}
.brand:hover { color: var(--text); }
.brand-mark { color: var(--accent); }
.brand-cpc { color: var(--text); }
.brand-dot { color: var(--dim); font-size: 0.72em; margin-left: 1px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-link {
  padding: 7px 11px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
  transition: color 0.15s, background 0.15s;
}
.nav-link:hover { color: var(--text); background: rgba(148, 163, 184, 0.08); }
.nav-link.active { color: var(--accent); background: rgba(74, 222, 128, 0.10); }
.nav-user { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.nav-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(74, 222, 128, 0.35), rgba(34, 211, 238, 0.25));
  border: 1px solid var(--border-strong);
  display: grid;
  place-items: center;
  font-weight: 700;
  color: var(--text);
  font-size: 14px;
}
.nav-username { color: var(--text); font-size: 14px; font-weight: 600; }
.nav-logout { color: var(--dim); font-size: 13px; }
.nav-logout:hover { color: var(--red); }

/* ---------- 布局 ---------- */
.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 30px 22px 64px;
}
.page-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.page-title { font-size: 28px; }
.page-sub { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
.head-stats { display: flex; gap: 18px; color: var(--muted); font-size: 13px; flex-wrap: wrap; }
.head-stats strong { color: var(--text); font-size: 15px; }

.grid { display: grid; gap: 18px; margin-bottom: 22px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-radar { grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); align-items: start; }
.stack { display: grid; gap: 18px; }
.no-pad { padding: 0 !important; }

/* ---------- 卡片 / 统计 ---------- */
.card {
  background: linear-gradient(180deg, rgba(20, 32, 57, 0.92), rgba(16, 26, 46, 0.92));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.card-title { font-size: 15.5px; }
.card-body { padding: 18px 20px; }

.stat {
  background: linear-gradient(180deg, rgba(20, 32, 57, 0.9), rgba(16, 26, 46, 0.9));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}
.stat-label { color: var(--muted); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.07em; }
.stat-value { font-size: 32px; font-weight: 800; line-height: 1.2; margin: 6px 0 2px; font-variant-numeric: tabular-nums; }
.stat-foot { color: var(--dim); font-size: 12.5px; }
.big-number { font-size: 40px; font-weight: 800; line-height: 1.1; margin-bottom: 6px; }
.plan-line { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 10px; font-size: 14px; }
.progress { height: 8px; border-radius: 999px; background: rgba(148, 163, 184, 0.16); overflow: hidden; margin: 10px 0 8px; }
.progress-lg { height: 10px; }
.progress-bar { height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width 0.3s ease; }
.progress-meta { display: flex; gap: 18px; color: var(--muted); font-size: 12.5px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  line-height: 1.3;
  cursor: pointer;
  transition: transform 0.12s, background 0.15s, border-color 0.15s, opacity 0.15s;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--accent); color: #052e16; }
.btn-primary:hover { background: #86efac; color: #052e16; }
.btn-ghost {
  background: rgba(148, 163, 184, 0.08);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { background: rgba(148, 163, 184, 0.16); color: var(--text); }
.btn-danger { background: rgba(248, 113, 113, 0.12); border-color: rgba(248, 113, 113, 0.4); color: var(--red); }
.btn-danger:hover { background: rgba(248, 113, 113, 0.2); color: var(--red); }
.btn-link { background: transparent; color: var(--accent-2); padding: 6px 4px; }
.btn-lg { padding: 12px 22px; font-size: 15px; border-radius: 11px; }
.btn-sm { padding: 6px 11px; font-size: 12.5px; border-radius: 7px; }
.btn-block { width: 100%; margin-top: 10px; }

/* ---------- 徽章 / 标签 / 颜色 ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid transparent;
  white-space: nowrap;
}
.badge-green { background: rgba(74, 222, 128, 0.12); color: var(--accent); border-color: rgba(74, 222, 128, 0.28); }
.badge-blue { background: rgba(96, 165, 250, 0.12); color: var(--blue); border-color: rgba(96, 165, 250, 0.3); }
.badge-amber { background: rgba(251, 191, 36, 0.12); color: var(--amber); border-color: rgba(251, 191, 36, 0.3); }
.badge-gray { background: rgba(148, 163, 184, 0.10); color: var(--muted); border-color: var(--border); }

.tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 6px;
  background: rgba(148, 163, 184, 0.10);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 11.5px;
  font-family: var(--mono);
  white-space: nowrap;
}
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0; }
.rating {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 5px;
  background: rgba(148, 163, 184, 0.10);
}
.r-gray { color: #9ca3af; }
.r-green { color: #4ade80; }
.r-cyan { color: #22d3ee; }
.r-blue { color: #60a5fa; }
.r-purple { color: #c084fc; }
.r-orange { color: #fb923c; }
.r-red { color: #f87171; }
.delta-up { color: var(--accent); }
.delta-down { color: var(--red); }
.v-ok { color: var(--accent); font-weight: 600; }
.v-fail { color: var(--red); }
.v-testing { color: var(--muted); }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.table th {
  text-align: left;
  padding: 10px 16px;
  color: var(--dim);
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
  background: rgba(148, 163, 184, 0.03);
}
.table td { padding: 11px 16px; border-bottom: 1px solid rgba(148, 163, 184, 0.07); vertical-align: middle; }
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: rgba(148, 163, 184, 0.04); }
.table .num { text-align: right; }
.rank-col { width: 52px; color: var(--muted); }
.medal {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  font-size: 11.5px;
  font-weight: 700;
  color: #0b1220;
}
.medal-1 { background: #facc15; }
.medal-2 { background: #cbd5e1; }
.medal-3 { background: #d97706; }

/* ---------- 表单 ---------- */
.form { display: grid; gap: 14px; }
.form-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: end; }
.field { display: grid; gap: 6px; }
.field label { font-size: 12.5px; color: var(--muted); font-weight: 600; }
.field input,
.input {
  width: 100%;
  background: rgba(7, 11, 20, 0.65);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.field input:focus,
.input:focus {
  border-color: rgba(74, 222, 128, 0.6);
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.10);
}
.field-actions { display: flex; align-items: flex-end; }
.input-sm { padding: 7px 10px; font-size: 12.5px; }
.input::placeholder { color: var(--dim); }
.error-box,
.flash {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  margin-bottom: 14px;
  border: 1px solid transparent;
}
.error-box { background: rgba(248, 113, 113, 0.10); color: #fca5a5; border-color: rgba(248, 113, 113, 0.3); }
.flash-success { background: rgba(74, 222, 128, 0.10); color: #86efac; border-color: rgba(74, 222, 128, 0.3); }
.flash-info { background: rgba(96, 165, 250, 0.10); color: #93c5fd; border-color: rgba(96, 165, 250, 0.3); }
.flash-error { background: rgba(248, 113, 113, 0.10); color: #fca5a5; border-color: rgba(248, 113, 113, 0.3); }
.flash-stack { margin-bottom: 18px; }

/* ---------- 首页 ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 46px;
  align-items: center;
  padding: 44px 0 54px;
}
.eyebrow {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin-bottom: 14px;
}
.hero h1 { font-size: clamp(34px, 4.6vw, 52px); line-height: 1.16; letter-spacing: -0.03em; }
.hero-sub { color: var(--muted); font-size: 16px; max-width: 560px; margin: 18px 0 26px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 34px; margin-top: 34px; }
.hero-stats div { display: grid; }
.hero-stats strong { font-size: 26px; font-weight: 800; color: var(--accent); }
.hero-stats span { color: var(--dim); font-size: 12.5px; }
.hero-panel {
  background: linear-gradient(180deg, rgba(20, 32, 57, 0.95), rgba(13, 20, 36, 0.95));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.mini-radar {
  position: relative;
  width: 154px;
  height: 154px;
  margin: 0 auto 22px;
  display: grid;
  place-items: center;
}
.mini-radar-ring {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(74, 222, 128, 0.35);
  border-radius: 50%;
  clip-path: polygon(50% 0, 100% 38%, 82% 100%, 18% 100%, 0 38%);
  background: rgba(74, 222, 128, 0.05);
}
.mini-radar-ring.ring-2 { inset: 22px; opacity: 0.8; }
.mini-radar-ring.ring-3 { inset: 44px; opacity: 0.6; background: rgba(74, 222, 128, 0.10); }
.mini-score {
  position: relative;
  font-family: var(--mono);
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
}
.mini-rows { display: grid; gap: 11px; }
.mini-row { display: grid; grid-template-columns: 62px 1fr; align-items: center; gap: 10px; }
.mini-row span { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.mini-bar { height: 6px; background: rgba(148, 163, 184, 0.14); border-radius: 999px; overflow: hidden; }
.mini-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: inherit; }
.mini-caption { margin: 20px 0 0; text-align: center; color: var(--dim); font-size: 12.5px; }

.features { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; padding: 12px 0 46px; }
.feature {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(16, 26, 46, 0.7);
  padding: 20px;
}
.feature h3 { font-size: 15.5px; margin-bottom: 8px; color: var(--accent); }
.feature p { color: var(--muted); font-size: 13px; margin: 0; }
.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 30px;
  border-radius: 18px;
  border: 1px solid rgba(74, 222, 128, 0.22);
  background: linear-gradient(120deg, rgba(74, 222, 128, 0.08), rgba(34, 211, 238, 0.05));
  flex-wrap: wrap;
}
.cta-band h2 { font-size: 22px; margin-bottom: 4px; }

.quick-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.quick-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: rgba(16, 26, 46, 0.8);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s;
}
.quick-card:hover { border-color: rgba(74, 222, 128, 0.4); transform: translateY(-2px); color: var(--text); }
.quick-icon { font-size: 22px; color: var(--accent); }
.quick-card strong { display: block; font-size: 14px; }
.quick-card small { color: var(--dim); font-size: 12px; }

/* ---------- 登录 / 注册 ---------- */
.auth-wrap { display: flex; justify-content: center; padding: 40px 0; }
.auth-card {
  width: 100%;
  max-width: 420px;
  background: linear-gradient(180deg, rgba(20, 32, 57, 0.95), rgba(13, 20, 36, 0.95));
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px;
  box-shadow: var(--shadow);
}
.auth-title { font-size: 25px; }
.auth-sub { color: var(--muted); font-size: 13.5px; margin: 6px 0 22px; }
.auth-foot { margin: 18px 0 0; text-align: center; color: var(--muted); font-size: 13.5px; }

/* ---------- 雷达图 ---------- */
.radar-card { display: flex; flex-direction: column; }
.radar-body { height: 440px; position: relative; }
.radar-body canvas { width: 100% !important; height: 100% !important; }
.radar-legend {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 10px 20px 16px;
  color: var(--muted);
  font-size: 12.5px;
}
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; margin-right: 6px; }
.dot-user { background: var(--accent); }
.dot-avg { background: var(--blue); }
.weak-list { list-style: none; padding: 0; margin: 0 0 14px; }
.weak-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.weak-list li:last-child { border-bottom: none; }
.weak-score { font-family: var(--mono); color: var(--accent); font-weight: 700; }

/* ---------- 空状态 ---------- */
.empty {
  padding: 30px 20px;
  text-align: center;
  color: var(--dim);
  font-size: 13.5px;
}
.empty-state { text-align: center; padding: 46px 26px; }
.empty-icon {
  width: 58px;
  height: 58px;
  margin: 0 auto 16px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 24px;
  color: var(--accent);
  background: rgba(74, 222, 128, 0.10);
  border: 1px solid rgba(74, 222, 128, 0.28);
}
.empty-state h2, .empty-state h3 { font-size: 21px; margin-bottom: 8px; }
.empty-state p { max-width: 480px; margin: 0 auto 20px; }
.empty-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }

/* ---------- 训练计划 ---------- */
.reasoning-card { padding: 22px 24px; margin-bottom: 20px; }
.reasoning-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.coach-badge {
  display: inline-flex;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: rgba(74, 222, 128, 0.10);
  border: 1px solid rgba(74, 222, 128, 0.3);
}
.reasoning-text { color: #cbd5e1; font-size: 14.5px; line-height: 1.75; }
.problem-list { display: grid; gap: 14px; }
.problem-card {
  display: flex;
  gap: 18px;
  justify-content: space-between;
  padding: 18px 20px;
  background: linear-gradient(180deg, rgba(20, 32, 57, 0.9), rgba(16, 26, 46, 0.9));
  border: 1px solid var(--border);
  border-left: 3px solid rgba(148, 163, 184, 0.25);
  border-radius: var(--radius);
  transition: border-color 0.15s;
}
.problem-card:hover { border-color: var(--border-strong); border-left-color: var(--accent-2); }
.problem-card.is-solved { border-left-color: var(--accent); background: linear-gradient(180deg, rgba(74, 222, 128, 0.06), rgba(16, 26, 46, 0.9)); }
.problem-card.is-skipped { opacity: 0.62; border-left-color: var(--dim); }
.problem-main { flex: 1; min-width: 0; }
.problem-headline { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.problem-index {
  width: 27px;
  height: 27px;
  border-radius: 7px;
  display: inline-grid;
  place-items: center;
  background: rgba(148, 163, 184, 0.10);
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  flex: none;
}
.problem-title { color: var(--text); font-weight: 600; font-size: 15px; }
.problem-title:hover { color: var(--accent-2); }
.problem-id { color: var(--dim); font-family: var(--mono); font-size: 11.5px; }
.reason { color: var(--muted); font-size: 13px; margin: 4px 0 0; }
.problem-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.note-line { margin: 18px 0 0; }
.problem-meta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; color: var(--dim); font-size: 12.5px; margin-top: 2px; }
.problem-meta strong { color: var(--text); font-family: var(--mono); }
.poll-hint { color: var(--accent-2); }

/* ---------- 模拟赛 ---------- */
.contest-hero { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 22px 24px; margin-bottom: 22px; flex-wrap: wrap; }
.contest-hero-main { display: flex; align-items: center; gap: 42px; flex-wrap: wrap; }
.contest-score-big { font-size: 38px; font-weight: 800; line-height: 1.15; }
.contest-result { text-align: right; }
.delta { font-size: 30px; font-weight: 800; font-family: var(--mono); }
.contest-hero-actions { display: flex; gap: 10px; }
.start-contest { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.7fr); gap: 36px; padding: 30px; margin-bottom: 22px; }
.start-copy h2 { font-size: 27px; margin-bottom: 12px; }
.start-copy p { color: var(--muted); max-width: 620px; }
.rule-list { color: var(--muted); font-size: 13.5px; display: grid; gap: 6px; margin: 14px 0 20px; }
.preview-box {
  background: rgba(7, 11, 20, 0.45);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  align-self: start;
}
.preview-title { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--dim); margin-bottom: 12px; }
.preview-list { display: grid; gap: 8px; }
.preview-row { display: flex; align-items: center; justify-content: space-between; }
.preview-slot { width: 26px; height: 26px; display: grid; place-items: center; border-radius: 6px; background: rgba(148, 163, 184, 0.10); font-family: var(--mono); font-size: 12px; color: var(--muted); }
.preview-note { margin-top: 14px; }

.contest-detail-head { align-items: flex-start; }
.contest-head-right { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.timer { font-family: var(--mono); font-size: 28px; font-weight: 700; color: var(--amber); letter-spacing: 0.05em; }
.result-pill { display: grid; text-align: right; }
.result-pill strong { font-size: 24px; font-family: var(--mono); }
.info-banner {
  padding: 13px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(34, 211, 238, 0.22);
  background: rgba(34, 211, 238, 0.06);
  color: #a5f3fc;
  font-size: 13px;
  margin-bottom: 18px;
}
.info-banner strong { color: #fca5a5; }
.info-banner-ok { border-color: rgba(74, 222, 128, 0.24); background: rgba(74, 222, 128, 0.06); color: #bbf7d0; }
.contest-summary-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 18px;
}
.summary-item {
  background: rgba(16, 26, 46, 0.75);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  display: grid;
  gap: 2px;
}
.summary-label { color: var(--dim); font-size: 12px; }
.summary-value { font-size: 20px; font-weight: 700; font-family: var(--mono); }
.contest-problems { display: grid; gap: 12px; margin-bottom: 22px; }

/* ---------- 补题 ---------- */
.makeup-list { display: grid; gap: 14px; }
.makeup-item {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.makeup-item:last-child { border-bottom: none; padding-bottom: 0; }
.makeup-main { flex: 1; min-width: 240px; }
.makeup-meta { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 6px; }
.makeup-actions { display: grid; gap: 8px; align-content: center; min-width: 300px; }
.submission-form { display: flex; gap: 8px; }
.submission-form .input { flex: 1; min-width: 150px; }

/* ---------- 个人主页 ---------- */
.profile-head { display: flex; justify-content: space-between; gap: 26px; padding: 26px; margin-bottom: 20px; flex-wrap: wrap; }
.profile-identity { display: flex; gap: 18px; align-items: center; }
.avatar-lg {
  width: 66px;
  height: 66px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 27px;
  font-weight: 800;
  background: linear-gradient(135deg, rgba(74, 222, 128, 0.22), rgba(96, 165, 250, 0.18));
  border: 1px solid var(--border-strong);
  flex: none;
}
.profile-name { font-size: 26px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.profile-stats { display: flex; gap: 26px; flex-wrap: wrap; }
.pstat { display: grid; min-width: 90px; }
.pstat span { color: var(--dim); font-size: 12px; }
.pstat strong { font-size: 24px; font-weight: 800; font-variant-numeric: tabular-nums; }
.pstat small { color: var(--dim); font-size: 11.5px; }

.achievements { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
.achievement {
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(251, 191, 36, 0.26);
  background: rgba(251, 191, 36, 0.06);
  text-align: center;
}
.achievement.locked { border-color: var(--border); background: rgba(148, 163, 184, 0.03); opacity: 0.55; }
.ach-icon { font-size: 19px; color: var(--amber); line-height: 1.2; }
.achievement.locked .ach-icon { color: var(--dim); }
.ach-name { font-size: 12.5px; font-weight: 700; margin-top: 4px; }
.ach-desc { font-size: 10.5px; color: var(--dim); line-height: 1.35; margin-top: 2px; }

.skill-bars { display: grid; gap: 11px; }
.skill-row { display: grid; grid-template-columns: 90px 1fr 46px 44px; gap: 10px; align-items: center; font-size: 12.5px; }
.skill-name { font-family: var(--mono); color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.skill-bar { height: 6px; border-radius: 999px; background: rgba(148, 163, 184, 0.14); overflow: hidden; }
.skill-bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.skill-value { font-family: var(--mono); text-align: right; color: var(--text); }
.mini-stats-row { display: flex; gap: 18px; padding: 14px 16px; color: var(--dim); font-size: 12.5px; border-top: 1px solid var(--border); }

/* ---------- 排行榜 ---------- */
.tabs { display: flex; gap: 6px; margin-bottom: 16px; flex-wrap: wrap; }
.tab {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 13.5px;
  background: rgba(148, 163, 184, 0.04);
}
.tab:hover { color: var(--text); border-color: var(--border-strong); }
.tab.active { color: #052e16; background: var(--accent); border-color: var(--accent); font-weight: 700; }

/* ---------- 错误页 / Toast / 页脚 ---------- */
.error-page { text-align: center; padding: 90px 20px; }
.error-code { font-size: 84px; font-weight: 800; color: rgba(148, 163, 184, 0.25); line-height: 1; }
.error-page h1 { font-size: 24px; margin: 12px 0 6px; }
.error-page .empty-actions { margin-top: 24px; }

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 100;
  max-width: 360px;
  padding: 12px 16px;
  border-radius: 10px;
  background: #1e293b;
  border: 1px solid var(--border-strong);
  color: var(--text);
  font-size: 13.5px;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast.error { border-color: rgba(248, 113, 113, 0.5); color: #fecaca; }
.toast.success { border-color: rgba(74, 222, 128, 0.5); color: #bbf7d0; }
.toast.info { border-color: rgba(96, 165, 250, 0.5); color: #bfdbfe; }

.footer { border-top: 1px solid var(--border); margin-top: 30px; }
.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 22px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--dim);
  font-size: 12.5px;
}
.footer strong { color: var(--accent); }

/* ---------- 响应式 ---------- */
@media (max-width: 1000px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-radar { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero { grid-template-columns: 1fr; gap: 30px; padding-top: 28px; }
  .start-contest { grid-template-columns: 1fr; gap: 22px; }
  .form-grid { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .nav-inner { gap: 12px; padding: 0 14px; }
  .nav-username { display: none; }
  .nav-links { gap: 0; }
  .nav-link { padding: 7px 8px; font-size: 13px; }
  .container { padding: 22px 14px 50px; }
  .page-title { font-size: 23px; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .stat-value { font-size: 26px; }
  .features { grid-template-columns: 1fr; }
  .quick-grid { grid-template-columns: 1fr; }
  .contest-summary-bar { grid-template-columns: 1fr 1fr; }
  .problem-card { flex-direction: column; }
  .problem-actions { justify-content: flex-start; }
  .achievements { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .profile-stats { gap: 18px; }
  .profile-head { padding: 20px; }
  .radar-body { height: 340px; }
  .makeup-actions { min-width: 100%; }
}
@media (max-width: 460px) {
  .grid-4 { grid-template-columns: 1fr; }
  .contest-summary-bar { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .submission-form { flex-direction: column; }
}