:root{--bg: #1a1a1a;--bg2: #222222;--bg3: #2a2a2a;--card: rgba(255,255,255,.07);--card-hover: rgba(255,255,255,.11);--border: rgba(200,169,110,.2);--border-strong: rgba(200,169,110,.35);--gold: #C8A96E;--gold-light: #D4BA82;--gold-dim: rgba(200,169,110,.15);--gold-glow: rgba(200,169,110,.3);--text: #E8E0D4;--text2: #9A9080;--text3: #605848;--green: #8B9A6B;--green-dim: rgba(139,154,107,.15);--red: #a05050;--red-dim: rgba(160,80,80,.15);--radius: 16px;--radius-sm: 10px;--nav-h: 64px;--safe-bottom: env(safe-area-inset-bottom, 0px);--font: "PingFang SC", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Microsoft YaHei", sans-serif;--font-serif: "Noto Serif SC", "Songti SC", "STSong", Georgia, 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96px #c8a96e26}.practice-play-btn:active{transform:scale(.93)}.practice-play-btn:focus-visible{outline:2px solid var(--gold);outline-offset:4px}.practice-play-btn.practice-stop{border-color:var(--red);background:#a050501a;box-shadow:0 0 24px #a0505026}.practice-play-btn.practice-stop svg{fill:var(--red)}.practice-sound-section{padding:0 20px 24px;padding-bottom:max(24px,calc(env(safe-area-inset-bottom,0px) + 16px));position:relative;z-index:2}.breath-hint{position:absolute;bottom:16px;left:0;right:0;font-size:13px;color:var(--text3);text-align:center}.breath-count{font-size:22px;color:var(--gold);margin-top:4px;font-weight:300}::-webkit-scrollbar{width:0}@media(max-width:360px){.stats-row{gap:8px}.stat-card{padding:12px 4px}.stat-num{font-size:22px}}