:root { color-scheme: dark; --bg:#090c12; --panel:#11161f; --panel-2:#151c27; --line:#263040; --text:#f3f6fb; --muted:#8994a5; --accent:#ffcf4a; --accent-2:#f4a938; --accent-rgb:255,207,74; }
* { box-sizing: border-box; }
/* 网站风格滚动条（全局统一，替代系统默认样式；细变体见 .thin-scrollbar） */
* { scrollbar-width: thin; scrollbar-color: rgba(var(--accent-rgb), .45) transparent; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb { border-radius: 999px; background: rgba(var(--accent-rgb), .38); }
*::-webkit-scrollbar-thumb:hover { background: rgba(var(--accent-rgb), .68); }
.thin-scrollbar { scrollbar-width: thin; scrollbar-color: rgba(var(--accent-rgb),.45) transparent; }
.thin-scrollbar::-webkit-scrollbar { width: 6px; height: 6px; }
.thin-scrollbar::-webkit-scrollbar-track { background: transparent; }
.thin-scrollbar::-webkit-scrollbar-thumb { border-radius: 999px; background: rgba(var(--accent-rgb),.38); }
.thin-scrollbar::-webkit-scrollbar-thumb:hover { background: rgba(var(--accent-rgb),.68); }
body { margin:0; min-height:100vh; color:var(--text); background:radial-gradient(circle at 80% 5%,rgba(var(--accent-rgb),.08),transparent 28rem),var(--bg); font-family:"Nunito","Microsoft YaHei",sans-serif; }
button { font:inherit; }
.leaderboard-shell { width:min(1050px,calc(100% - 40px)); margin:auto; padding-bottom:34px; }
.leaderboard-topbar { height:76px; display:flex; align-items:center; justify-content:space-between; border-bottom:1px solid rgba(255,255,255,.07); }
.leaderboard-brand { display:flex; align-items:center; gap:11px; color:var(--text); text-decoration:none; }
.leaderboard-brand > span { width:34px; height:34px; display:grid; place-items:center; border-radius:9px; background:var(--accent); color:#17130a; font-weight:800; box-shadow:0 0 24px rgba(var(--accent-rgb),.2); }
.leaderboard-brand b { font-size:18px; }
.back-link { padding:9px 13px; border:1px solid var(--line); border-radius:999px; color:var(--muted); text-decoration:none; font-size:12px; font-weight:800; }
.back-link:hover { color:var(--accent); border-color:var(--accent); }
.leaderboard-hero { padding:48px 4px 28px; }
.leaderboard-hero > p { margin:0 0 10px; color:var(--accent); font-size:11px; font-weight:800; letter-spacing:.22em; }
.leaderboard-hero h1 { margin:0; font-size:clamp(34px,5vw,52px); letter-spacing:-.035em; }
.leaderboard-hero div { margin-top:12px; color:var(--muted); font-size:13px; }
.leaderboard-hero strong { color:var(--accent); }
.level-tabs { display:grid; grid-template-columns:repeat(6,1fr); gap:8px; margin-bottom:14px; }
.level-tabs button { min-height:50px; border:1px solid var(--line); border-radius:11px; background:var(--panel); color:var(--muted); cursor:pointer; font-weight:800; }
.level-tabs button:hover { color:var(--text); border-color:#465268; }
.level-tabs button.active { color:#171209; border-color:var(--accent); background:var(--accent); }
.leaderboard-panel { overflow:hidden; border:1px solid var(--line); border-radius:18px; background:linear-gradient(145deg,#141a24,#0f141c); box-shadow:0 24px 70px rgba(0,0,0,.25); }
.panel-heading { display:flex; justify-content:space-between; align-items:center; padding:22px 24px 16px; }
.panel-heading p { margin:0 0 3px; color:var(--accent); font-size:10px; font-weight:800; letter-spacing:.12em; }
.panel-heading h2 { margin:0; font-size:25px; }
.panel-heading > span { color:var(--muted); font-size:11px; }
.my-rank { margin:0 24px 16px; padding:11px 14px; border:1px solid rgba(var(--accent-rgb),.35); border-radius:10px; background:rgba(var(--accent-rgb),.08); color:var(--muted); font-size:12px; }
.my-rank strong { color:var(--accent); }
.table-wrap { overflow-x:auto; }
table { width:100%; min-width:820px; border-collapse:collapse; }
th,td { padding:14px 16px; border-top:1px solid var(--line); text-align:left; white-space:nowrap; }
th { color:var(--muted); background:rgba(8,12,18,.38); font-size:10px; letter-spacing:.06em; }
td { font-size:12px; }
tbody tr.current-user { background:rgba(var(--accent-rgb),.08); }
tbody tr:hover { background:rgba(255,255,255,.025); }
.rank { width:68px; color:var(--muted); font-weight:800; }
.rank.medal { color:var(--accent); font-size:17px; }
.username { font-weight:800; }
.score { color:var(--accent); font-weight:800; }
.metric-muted { color:var(--muted); }
.challenge-button { padding:7px 12px; border:1px solid var(--accent); border-radius:8px; background:rgba(var(--accent-rgb),.08); color:var(--accent); cursor:pointer; font-size:11px; font-weight:800; }
.challenge-button:hover { background:var(--accent); color:#171209; }
.empty-state { padding:58px 20px; border-top:1px solid var(--line); color:var(--muted); text-align:center; font-size:13px; }
footer { padding-top:20px; color:#606b7a; text-align:center; font-size:10px; }
/* 排行榜底部内联词（WPM 等）hover 解释 */
.inline-tip { position: relative; cursor: help; border-bottom: 1px dotted currentColor; outline: none; }
.inline-tip::before,
.inline-tip::after { position: absolute; left: 50%; bottom: calc(100% + 6px); z-index: 30; pointer-events: none; opacity: 0; visibility: hidden; transition: opacity .16s ease, transform .16s ease, visibility .16s; }
.inline-tip::before { content: ""; border: 6px solid transparent; border-top-color: #303b4c; transform: translate(-50%, 3px); }
.inline-tip::after { content: attr(data-tip); bottom: calc(100% + 18px); width: max-content; max-width: 250px; padding: 9px 12px; border: 1px solid #303b4c; border-radius: 8px; background: #151c26; color: #dfe5ed; box-shadow: 0 10px 30px rgba(0,0,0,.35); font-size: 12px; font-weight: 600; line-height: 1.5; white-space: normal; text-align: left; transform: translate(-50%, 3px); }
.inline-tip:hover::before,
.inline-tip:hover::after,
.inline-tip:focus::before,
.inline-tip:focus::after { opacity: 1; visibility: visible; transform: translate(-50%, 0); }
body[data-theme="light"] .inline-tip::after { background: #fff; color: #1b2634; border-color: #d2d9e3; box-shadow: 0 10px 30px rgba(50,62,80,.18); }
body[data-theme="light"] .inline-tip::before { border-top-color: #d2d9e3; }
@media (max-width:700px) {
  .leaderboard-shell { width:min(100% - 24px,1050px); }
  .leaderboard-topbar { height:64px; }
  .leaderboard-brand b { font-size:15px; }
  .leaderboard-hero { padding:32px 3px 22px; }
  .level-tabs { grid-template-columns:repeat(3,minmax(0,1fr)); gap:4px; }
  .level-tabs button { min-height:42px; padding:4px; font-size:11px; }
  .panel-heading { padding:18px 16px 13px; }
  .my-rank { margin:0 16px 14px; }
}
body[data-theme="light"] { color-scheme:light; --bg:#eef2f7; --panel:#fff; --panel-2:#f5f7fa; --line:#d5dce6; --text:#18202b; --muted:#687487; background:radial-gradient(circle at 80% 5%,rgba(var(--accent-rgb),.11),transparent 25rem),var(--bg); }
body[data-theme="light"] .leaderboard-panel { background:#fff; box-shadow:0 20px 55px rgba(50,62,80,.09); }
body[data-theme="light"] th { background:#f5f7fa; }