:root{--bg:#f5f5f7;--card:#fff;--t:#1a1a1a;--t2:#555;--t3:#999;--b:#e5e5ea;--a:#007aff;--a2:#5ac8fa;--g:#34c759;--r:#ff3b30;--o:#ff9500;--tag-bg:#eef4ff;--tag-t:#0056b3;--nav-h:82px;--header-h:56px;--player-h:64px;--safe-b:env(safe-area-inset-bottom,0px)}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-tap-highlight-color:transparent}
body{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display",system-ui,sans-serif;background:var(--bg);color:var(--t);line-height:1.5;-webkit-font-smoothing:antialiased;overflow:hidden;height:100dvh;width:100vw}

.app{display:flex;flex-direction:column;height:100dvh;width:100vw;position:relative;overflow:hidden}

.app-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:.5px solid var(--b);padding:0 16px;height:var(--header-h);display:flex;align-items:center;justify-content:space-between}
.app-header h1{font-size:17px;font-weight:700;letter-spacing:-.2px}
.app-header .hdr-right{display:flex;gap:8px;align-items:center}
.hdr-icon{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--bg);border:none;cursor:pointer;font-size:16px;color:var(--t2)}

.app-content{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;overscroll-behavior-y:contain;padding-bottom:calc(var(--nav-h) + var(--safe-b))}
.app-content::-webkit-scrollbar{display:none}

.tab{display:none;min-height:100%}
.tab.on{display:block}

.sticky-player{position:fixed;bottom:calc(var(--nav-h) + var(--safe-b));left:0;right:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:.5px solid var(--b);padding:8px 16px;display:none;align-items:center;gap:10px;height:var(--player-h)}
.sticky-player.on{display:flex}
.sticky-player .sp-info{flex:1;min-width:0}
.sticky-player .sp-title{font-size:12px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sticky-player .sp-sub{font-size:10px;color:var(--t3)}
.sticky-player audio{height:36px;flex:1;min-width:120px;max-width:200px}

.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:.5px solid var(--b);display:flex;height:calc(var(--nav-h) + var(--safe-b));padding-bottom:var(--safe-b)}
.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:6px 0;cursor:pointer;-webkit-tap-highlight-color:transparent;text-decoration:none;border:none;background:none}
.nav-item svg{width:24px;height:24px;stroke:var(--t3);stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round;transition:stroke .15s}
.nav-item span{font-size:10px;color:var(--t3);font-weight:500;transition:color .15s}
.nav-item.on svg{stroke:var(--a)}
.nav-item.on span{color:var(--a);font-weight:600}

.card{background:var(--card);border-radius:16px;padding:16px;margin:0 16px 12px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.card:first-child{margin-top:12px}

.ep-card .ep-top{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.ep-num{width:36px;height:36px;border-radius:10px;background:var(--a);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex-shrink:0}
.ep-meta{flex:1;min-width:0}
.ep-date{font-size:10px;color:var(--t3);text-transform:uppercase;letter-spacing:.3px}
.ep-dur{font-size:10px;color:var(--t3);margin-left:6px}
.ep-card .ep-title{font-size:15px;font-weight:650;letter-spacing:-.2px;margin-bottom:2px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ep-card .ep-pattern{font-size:12px;color:var(--a);font-weight:500;margin-bottom:8px}
.ep-card .ep-desc{font-size:12px;color:var(--t2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:12px}
.ep-card .ep-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.play-btn{display:inline-flex;align-items:center;gap:6px;background:var(--a);color:#fff;border:none;border-radius:20px;padding:8px 16px;font-size:12px;font-weight:600;cursor:pointer}
.play-btn svg{width:14px;height:14px;fill:#fff;stroke:none}
.feedback-row{display:flex;align-items:center;gap:6px;margin-left:auto}
.feedback-row .fl{font-size:10px;color:var(--t3)}
.fb-btn{width:32px;height:32px;border-radius:50%;border:1.5px solid var(--b);background:#fff;cursor:pointer;font-size:14px;display:flex;align-items:center;justify-content:center;transition:all .15s}
.fb-btn:active{transform:scale(.9)}
.fb-btn.voted{border-color:var(--g);background:#f0fdf4}
.fb-btn.voted-bad{border-color:var(--r);background:#fef2f2}
.fb-status{font-size:10px;display:none}
.fb-status.show{display:inline}

.load-more{text-align:center;padding:16px;font-size:13px;color:var(--t3)}
.load-more button{background:none;border:1px solid var(--b);border-radius:20px;padding:8px 20px;font-size:12px;color:var(--a);cursor:pointer}

.sect-header{font-size:13px;font-weight:700;color:var(--t);padding:20px 16px 8px;letter-spacing:-.1px;position:sticky;top:0;background:var(--bg);z-index:5}
.sect-header .sect-count{font-size:11px;font-weight:400;color:var(--t3);margin-left:6px}

.pat-card{background:var(--card);border-radius:16px;padding:16px;margin:0 16px 10px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.pat-card .pat-phrase{font-size:15px;font-weight:700;color:var(--a);margin-bottom:2px;letter-spacing:-.2px}
.pat-card .pat-cat{display:inline-block;font-size:9px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;padding:2px 6px;border-radius:4px;background:var(--tag-bg);color:var(--tag-t);margin-bottom:6px}
.pat-card .pat-when{font-size:11px;color:var(--t2);margin-bottom:8px}
.pat-card details summary{font-size:12px;color:var(--a);cursor:pointer;font-weight:500;list-style:none;display:flex;align-items:center;gap:4px}
.pat-card details summary::before{content:'\25B6';font-size:8px;transition:transform .2s}
.pat-card details[open] summary::before{transform:rotate(90deg)}
.ex-box{background:var(--bg);border-radius:10px;padding:10px 12px;margin-top:8px;margin-bottom:6px}
.ex-box .ex-ctx{font-size:9px;font-weight:700;color:var(--a2);text-transform:uppercase;letter-spacing:.3px;margin-bottom:3px}
.ex-box .ex-q{font-size:12px;font-style:italic;color:var(--t);line-height:1.6}
.ex-box .ex-w{font-size:10px;color:var(--t2);margin-top:6px;padding-top:6px;border-top:.5px solid var(--b)}

.fw-card{background:var(--card);border-radius:16px;padding:16px;margin:0 16px 10px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.fw-card .fw-top{display:flex;align-items:center;gap:6px;margin-bottom:6px}
.fw-card .fw-tag{font-size:9px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;padding:2px 6px;border-radius:4px;background:var(--tag-bg);color:var(--tag-t)}
.fw-card .fw-src{font-size:9px;color:var(--t3);margin-left:auto}
.fw-card .fw-name{font-size:15px;font-weight:700;margin-bottom:2px;letter-spacing:-.2px}
.fw-card .fw-desc{font-size:12px;color:var(--t2);margin-bottom:10px}
.fw-card ol{padding-left:20px;font-size:12px;color:var(--t2)}
.fw-card ol li{padding:4px 0;line-height:1.6}
.fw-card ol b{color:var(--t)}

.prac-card{background:var(--card);border-radius:16px;padding:16px;margin:0 16px 10px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.prac-card .prac-comp{display:inline-block;font-size:9px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;padding:2px 6px;border-radius:4px;background:#fef3c7;color:#92400e;margin-bottom:6px}
.prac-card .prac-q{font-size:14px;font-weight:600;line-height:1.5;margin-bottom:8px}
.prac-card .prac-hint{font-size:11px;color:var(--t3);font-style:italic}
.prac-card details summary{font-size:12px;color:var(--a);cursor:pointer;font-weight:500;list-style:none;display:flex;align-items:center;gap:4px}
.prac-card details summary::before{content:'\25B6';font-size:8px;transition:transform .2s}
.prac-card details[open] summary::before{transform:rotate(90deg)}

.empty-state{text-align:center;padding:60px 32px;color:var(--t3)}
.empty-state .empty-icon{font-size:48px;margin-bottom:12px;opacity:.5}
.empty-state .empty-title{font-size:16px;font-weight:600;color:var(--t2);margin-bottom:4px}
.empty-state .empty-desc{font-size:13px}

.toast{position:fixed;bottom:calc(var(--nav-h) + var(--safe-b) + 12px);left:50%;transform:translateX(-50%) translateY(20px);background:var(--t);color:#fff;font-size:12px;padding:8px 16px;border-radius:20px;z-index:100;opacity:0;transition:all .25s;pointer-events:none}
.toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

.search-bar{margin:0 16px 0;position:relative;padding:8px 0;background:rgba(255,255,255,.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}
.search-bar input{width:100%;padding:10px 12px 10px 36px;border:1px solid var(--b);border-radius:12px;font-size:14px;background:var(--card);outline:none;-webkit-appearance:none}
.search-bar input:focus{border-color:var(--a);box-shadow:0 0 0 3px rgba(0,122,255,.1)}
.search-bar svg{position:absolute;left:10px;top:50%;transform:translateY(-50%);width:18px;height:18px;stroke:var(--t3);fill:none;stroke-width:2}

.hero-section{margin:12px 16px 12px;background:linear-gradient(135deg,#007aff,#5ac8fa);border-radius:20px;padding:24px 20px;color:#fff;position:relative;overflow:hidden}
.hero-section::after{content:'';position:absolute;top:-30px;right:-30px;width:120px;height:120px;border-radius:50%;background:rgba(255,255,255,.1)}
.hero-section::before{content:'';position:absolute;bottom:-40px;left:-20px;width:100px;height:100px;border-radius:50%;background:rgba(255,255,255,.08)}
.hero-section .hero-label{font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;opacity:.8;margin-bottom:4px}
.hero-section .hero-title{font-size:20px;font-weight:800;letter-spacing:-.3px;margin-bottom:4px;position:relative;z-index:1}
.hero-section .hero-sub{font-size:12px;opacity:.85;position:relative;z-index:1}
.hero-section .hero-play{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.3);border-radius:20px;padding:8px 16px;margin-top:12px;font-size:12px;font-weight:600;cursor:pointer;color:#fff;position:relative;z-index:1}
.hero-section .hero-play svg{width:14px;height:14px;fill:#fff;stroke:none}

.stat-row{display:flex;gap:8px;margin:0 16px 12px}
.stat-card{flex:1;background:var(--card);border-radius:14px;padding:14px 12px;text-align:center;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.stat-card .stat-num{font-size:22px;font-weight:800;color:var(--a);letter-spacing:-.5px}
.stat-card .stat-label{font-size:9px;color:var(--t3);text-transform:uppercase;letter-spacing:.3px;margin-top:2px}

.cat-chips{display:flex;gap:6px;padding:12px 16px 0;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}
.cat-chips::-webkit-scrollbar{display:none}
.cat-chip{white-space:nowrap;font-size:11px;font-weight:500;padding:6px 12px;border-radius:16px;border:1px solid var(--b);background:var(--card);cursor:pointer;transition:all .15s;flex-shrink:0}
.cat-chip.on{background:var(--a);color:#fff;border-color:var(--a)}

.sub-row{display:flex;gap:6px;justify-content:center;padding:16px;flex-wrap:wrap}
.sub-row a{font-size:11px;color:var(--t2);text-decoration:none;padding:6px 12px;border:1px solid var(--b);border-radius:16px;background:var(--card)}

@media(min-width:600px){
  .app-content{max-width:480px;margin:0 auto}
  .sticky-player{max-width:480px;left:50%;transform:translateX(-50%)}
  .bottom-nav{max-width:480px;left:50%;transform:translateX(-50%)}
}