/* DrumLang - The Language of Drumming */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --bg:#0f172a;--bg2:#1e293b;--bg3:#334155;--bg4:#475569;
  --text:#f1f5f9;--text2:#94a3b8;--text3:#64748b;
  --accent:#f59e0b;--accent2:#d97706;--accent-glow:rgba(245,158,11,.15);
  --green:#22c55e;--red:#ef4444;--blue:#3b82f6;--purple:#a855f7;--cyan:#06b6d4;
  --radius:12px;--radius-sm:8px;--shadow:0 4px 24px rgba(0,0,0,.3);
  --font:'Inter',system-ui,sans-serif;--mono:'JetBrains Mono',monospace;
}
html{font-size:16px;scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden}
body.light{--bg:#f8fafc;--bg2:#fff;--bg3:#e2e8f0;--bg4:#cbd5e1;--text:#0f172a;--text2:#475569;--text3:#94a3b8;--shadow:0 4px 24px rgba(0,0,0,.08)}

/* Scrollbar */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:var(--bg3);border-radius:3px}

/* Layout */
.app{display:flex;flex-direction:column;min-height:100vh}
.nav{position:fixed;bottom:0;left:0;right:0;background:var(--bg2);border-top:1px solid var(--bg3);display:flex;z-index:100;padding:4px 0;padding-bottom:env(safe-area-inset-bottom)}
.nav-item{flex:1;display:flex;flex-direction:column;align-items:center;padding:6px 4px;cursor:pointer;transition:.2s;color:var(--text3);text-decoration:none;gap:2px}
.nav-item:hover,.nav-item.active{color:var(--accent)}
.nav-item i{font-size:18px}
.nav-item span{font-size:10px;font-weight:600}
.main{flex:1;padding:16px;padding-bottom:80px;max-width:800px;margin:0 auto;width:100%}

/* Header */
.header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--bg2);border-bottom:1px solid var(--bg3);position:sticky;top:0;z-index:90}
.header h1{font-size:18px;font-weight:800;display:flex;align-items:center;gap:8px}
.header h1 .logo-icon{color:var(--accent);font-size:22px}
.header-actions{display:flex;gap:8px}
.header-actions button{background:none;border:none;color:var(--text2);font-size:18px;cursor:pointer;padding:6px;border-radius:var(--radius-sm);transition:.2s}
.header-actions button:hover{color:var(--accent);background:var(--accent-glow)}

/* Cards */
.card{background:var(--bg2);border-radius:var(--radius);padding:16px;margin-bottom:12px;border:1px solid var(--bg3);transition:.2s}
.card:hover{border-color:var(--bg4)}
.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.card-title{font-size:16px;font-weight:700;display:flex;align-items:center;gap:8px}
.card-badge{background:var(--accent);color:#000;font-size:10px;font-weight:700;padding:2px 8px;border-radius:20px}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:var(--radius-sm);font-weight:700;font-size:14px;cursor:pointer;border:none;transition:.2s;font-family:var(--font)}
.btn-primary{background:var(--accent);color:#000}
.btn-primary:hover{background:var(--accent2);transform:translateY(-1px)}
.btn-secondary{background:var(--bg3);color:var(--text)}
.btn-secondary:hover{background:var(--bg4)}
.btn-ghost{background:transparent;color:var(--text2);border:1px solid var(--bg3)}
.btn-ghost:hover{color:var(--accent);border-color:var(--accent)}
.btn-sm{padding:8px 16px;font-size:12px}
.btn-lg{padding:16px 32px;font-size:16px;border-radius:var(--radius)}
.btn-full{width:100%}
.btn-icon{width:40px;height:40px;padding:0;border-radius:50%}
.btn-play{width:64px;height:64px;border-radius:50%;font-size:24px;background:var(--accent);color:#000;box-shadow:0 0 30px rgba(245,158,11,.3)}
.btn-play:hover{transform:scale(1.05);box-shadow:0 0 40px rgba(245,158,11,.5)}
.btn-play.playing{background:var(--red);box-shadow:0 0 30px rgba(239,68,68,.3)}

/* Progress */
.progress-bar{width:100%;height:8px;background:var(--bg3);border-radius:4px;overflow:hidden}
.progress-fill{height:100%;border-radius:4px;transition:width .5s ease;background:linear-gradient(90deg,var(--accent),var(--green))}
.progress-sm{height:4px}

/* Stats Grid */
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:16px}
.stat-item{background:var(--bg2);border-radius:var(--radius-sm);padding:12px;text-align:center;border:1px solid var(--bg3)}
.stat-value{font-size:24px;font-weight:800;color:var(--accent);font-family:var(--mono)}
.stat-label{font-size:10px;color:var(--text2);font-weight:600;text-transform:uppercase;margin-top:2px}

/* Streak */
.streak-display{display:flex;align-items:center;gap:8px;padding:12px;background:linear-gradient(135deg,rgba(245,158,11,.1),rgba(239,68,68,.05));border-radius:var(--radius-sm);border:1px solid rgba(245,158,11,.2)}
.streak-fire{font-size:28px;animation:pulse 1s infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.1)}}
.streak-info{flex:1}
.streak-count{font-size:20px;font-weight:800;color:var(--accent)}
.streak-label{font-size:11px;color:var(--text2)}

/* Alphabet Grid */
.alphabet-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.alphabet-card{background:var(--bg2);border:2px solid var(--bg3);border-radius:var(--radius-sm);padding:12px 8px;text-align:center;cursor:pointer;transition:.2s;position:relative}
.alphabet-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.alphabet-card.active{border-color:var(--accent);background:var(--accent-glow)}
.alphabet-card.completed{border-color:var(--green)}
.alphabet-card .letter{font-size:22px;font-weight:900;font-family:var(--mono)}
.alphabet-card .pattern{display:flex;gap:3px;justify-content:center;margin-top:6px}
.alphabet-card .dot{width:10px;height:10px;border-radius:50%}
.alphabet-card .dot.hit{background:var(--accent)}
.alphabet-card .dot.rest{background:var(--bg3)}
.alphabet-card .check{position:absolute;top:4px;right:4px;color:var(--green);font-size:12px}
.ternary-section{margin-top:16px}
.ternary-section .alphabet-grid{grid-template-columns:repeat(4,1fr)}

/* Pattern Visualizer */
.pattern-viz{display:flex;align-items:center;justify-content:center;gap:6px;padding:16px;background:var(--bg);border-radius:var(--radius-sm);margin:12px 0}
.pattern-viz .beat{display:flex;flex-direction:column;align-items:center;gap:4px}
.pattern-viz .beat-dot{width:20px;height:20px;border-radius:50%;transition:.15s}
.pattern-viz .beat-dot.hit{background:var(--accent);box-shadow:0 0 12px rgba(245,158,11,.5)}
.pattern-viz .beat-dot.rest{background:var(--bg3)}
.pattern-viz .beat-dot.active{transform:scale(1.4);box-shadow:0 0 20px rgba(245,158,11,.8)}
.pattern-viz .beat-dot.ghost{background:var(--purple);opacity:.6}
.pattern-viz .beat-num{font-size:10px;color:var(--text3);font-family:var(--mono)}
.pattern-viz .beat-sticking{font-size:12px;font-weight:700;color:var(--cyan);font-family:var(--mono)}

/* Metronome */
.metronome{background:var(--bg2);border-radius:var(--radius);padding:16px;border:1px solid var(--bg3);margin:12px 0}
.metronome-display{text-align:center;margin-bottom:12px}
.bpm-value{font-size:48px;font-weight:900;font-family:var(--mono);color:var(--accent)}
.bpm-label{font-size:12px;color:var(--text2);font-weight:600}
.bpm-controls{display:flex;align-items:center;gap:12px;margin:12px 0}
.bpm-slider{flex:1;-webkit-appearance:none;height:6px;background:var(--bg3);border-radius:3px;outline:none}
.bpm-slider::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--accent);cursor:pointer}
.bpm-btns{display:flex;gap:4px}
.subdivision-toggle{display:flex;gap:4px;justify-content:center;margin:8px 0}
.subdivision-toggle button{padding:6px 16px;border-radius:20px;border:1px solid var(--bg3);background:transparent;color:var(--text2);font-size:12px;font-weight:600;cursor:pointer;transition:.2s}
.subdivision-toggle button.active{background:var(--accent);color:#000;border-color:var(--accent)}
.metro-beats{display:flex;justify-content:center;gap:8px;margin:8px 0}
.metro-beat{width:12px;height:12px;border-radius:50%;background:var(--bg3);transition:.1s}
.metro-beat.active{background:var(--accent);box-shadow:0 0 10px rgba(245,158,11,.6)}
.metro-beat.downbeat{background:var(--red);box-shadow:0 0 10px rgba(239,68,68,.6)}

/* Player Controls */
.player-controls{display:flex;align-items:center;justify-content:center;gap:16px;padding:16px}

/* Exercise List */
.exercise-list{display:flex;flex-direction:column;gap:8px}
.exercise-item{display:flex;align-items:center;gap:12px;padding:12px;background:var(--bg2);border-radius:var(--radius-sm);border:1px solid var(--bg3);cursor:pointer;transition:.2s}
.exercise-item:hover{border-color:var(--accent)}
.exercise-item.completed{border-color:var(--green);background:rgba(34,197,94,.05)}
.exercise-icon{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex-shrink:0}
.exercise-icon.binary{background:rgba(59,130,246,.15);color:var(--blue)}
.exercise-icon.ternary{background:rgba(168,85,247,.15);color:var(--purple)}
.exercise-icon.rudiment{background:rgba(245,158,11,.15);color:var(--accent)}
.exercise-icon.drumset{background:rgba(6,182,212,.15);color:var(--cyan)}
.exercise-info{flex:1}
.exercise-name{font-size:14px;font-weight:600}
.exercise-desc{font-size:11px;color:var(--text2);margin-top:2px}
.exercise-check{color:var(--green);font-size:16px}

/* Section Tabs */
.tabs{display:flex;overflow-x:auto;gap:4px;padding:4px;background:var(--bg);border-radius:var(--radius-sm);margin-bottom:16px;scrollbar-width:none}
.tabs::-webkit-scrollbar{display:none}
.tab{padding:8px 16px;border-radius:var(--radius-sm);font-size:12px;font-weight:600;cursor:pointer;white-space:nowrap;transition:.2s;color:var(--text2);background:transparent;border:none;font-family:var(--font)}
.tab:hover{color:var(--text)}
.tab.active{background:var(--accent);color:#000}

/* Notation Display */
.notation{background:var(--bg);border-radius:var(--radius-sm);padding:16px;margin:12px 0;font-family:var(--mono);text-align:center;position:relative;overflow-x:auto}
.notation .staff-line{display:flex;align-items:center;justify-content:center;gap:2px;padding:4px 0}
.notation .note{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;font-size:14px;font-weight:700;border-radius:4px;transition:.15s}
.notation .note.hit{color:var(--accent)}
.notation .note.rest{color:var(--text3)}
.notation .note.accent{color:var(--red);font-size:16px}
.notation .note.ghost-note{color:var(--purple);font-size:12px}
.notation .note.active-note{background:rgba(245,158,11,.2);transform:scale(1.2)}
.notation .sticking{font-size:11px;color:var(--cyan);margin-top:4px}
.notation .count-row{font-size:10px;color:var(--text3);display:flex;gap:2px;justify-content:center}

/* Level System */
.level-badge{display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:20px;font-size:11px;font-weight:700}
.level-badge.beginner{background:rgba(34,197,94,.15);color:var(--green)}
.level-badge.intermediate{background:rgba(59,130,246,.15);color:var(--blue)}
.level-badge.advanced{background:rgba(168,85,247,.15);color:var(--purple)}

/* Sections Navigation */
.sections-grid{display:grid;grid-template-columns:1fr;gap:12px}
.section-card{background:var(--bg2);border-radius:var(--radius);padding:16px;border:1px solid var(--bg3);cursor:pointer;transition:.2s;position:relative;overflow:hidden}
.section-card:hover{border-color:var(--accent);transform:translateY(-2px)}
.section-card .section-icon{font-size:28px;margin-bottom:8px}
.section-card .section-title{font-size:16px;font-weight:700;margin-bottom:4px}
.section-card .section-desc{font-size:12px;color:var(--text2)}
.section-card .section-progress{margin-top:12px}
.section-card .section-lock{position:absolute;top:12px;right:12px;color:var(--text3)}

/* Badges */
.badges-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.badge{text-align:center;padding:12px 8px;background:var(--bg2);border-radius:var(--radius-sm);border:1px solid var(--bg3);transition:.2s}
.badge.earned{border-color:var(--accent);background:var(--accent-glow)}
.badge .badge-icon{font-size:28px;margin-bottom:4px}
.badge .badge-name{font-size:10px;font-weight:600;color:var(--text2)}
.badge.earned .badge-name{color:var(--accent)}

/* Practice Timer */
.timer-display{text-align:center;padding:20px}
.timer-value{font-size:56px;font-weight:900;font-family:var(--mono);color:var(--accent)}
.timer-label{font-size:14px;color:var(--text2);margin-top:4px}
.timer-controls{display:flex;justify-content:center;gap:12px;margin-top:16px}

/* Pomodoro */
.pomodoro{background:linear-gradient(135deg,var(--bg2),var(--bg));border-radius:var(--radius);padding:20px;border:1px solid var(--bg3);text-align:center}
.pomodoro-ring{width:160px;height:160px;margin:0 auto 16px;position:relative}
.pomodoro-ring svg{transform:rotate(-90deg)}
.pomodoro-ring .ring-bg{fill:none;stroke:var(--bg3);stroke-width:8}
.pomodoro-ring .ring-fill{fill:none;stroke:var(--accent);stroke-width:8;stroke-linecap:round;transition:stroke-dashoffset .5s}
.pomodoro-time{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:32px;font-weight:900;font-family:var(--mono)}
.pomodoro-phase{font-size:14px;font-weight:600;color:var(--accent);margin-bottom:8px}

/* Glossary */
.glossary-item{padding:12px;border-bottom:1px solid var(--bg3)}
.glossary-term{font-weight:700;color:var(--accent);margin-bottom:4px}
.glossary-def{font-size:13px;color:var(--text2)}

/* Word Builder */
.word-builder{background:var(--bg);border-radius:var(--radius-sm);padding:16px;margin:12px 0}
.word-slots{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:12px}
.word-slot{width:48px;height:48px;border:2px dashed var(--bg3);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-weight:700;font-size:18px;transition:.2s}
.word-slot.filled{border-style:solid;border-color:var(--accent);color:var(--accent);background:var(--accent-glow)}

/* Drum Kit Visual */
.drum-kit{position:relative;width:100%;max-width:300px;height:200px;margin:12px auto}
.drum-part{position:absolute;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;cursor:pointer;transition:.15s;border:2px solid var(--bg3)}
.drum-part:hover{border-color:var(--accent)}
.drum-part.active{border-color:var(--accent);background:var(--accent-glow);transform:scale(1.05)}
.drum-part.hihat{width:50px;height:50px;top:20px;left:20px;background:var(--bg2);color:var(--cyan)}
.drum-part.snare{width:60px;height:60px;top:80px;left:50%;transform:translateX(-50%);background:var(--bg2);color:var(--blue)}
.drum-part.kick{width:70px;height:70px;bottom:10px;left:50%;transform:translateX(-50%);background:var(--bg2);color:var(--red)}
.drum-part.tom1{width:44px;height:44px;top:30px;left:35%;background:var(--bg2);color:var(--green)}
.drum-part.tom2{width:44px;height:44px;top:30px;right:35%;background:var(--bg2);color:var(--green)}
.drum-part.floor-tom{width:52px;height:52px;top:70px;right:20px;background:var(--bg2);color:var(--purple)}
.drum-part.ride{width:50px;height:50px;top:20px;right:20px;background:var(--bg2);color:var(--accent)}

/* Animations */
@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
@keyframes slideUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes glow{0%,100%{box-shadow:0 0 5px var(--accent)}50%{box-shadow:0 0 20px var(--accent)}}
.fade-in{animation:fadeIn .3s ease}
.slide-up{animation:slideUp .4s ease}

/* Toast */
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);background:var(--accent);color:#000;padding:10px 20px;border-radius:var(--radius-sm);font-weight:700;font-size:13px;z-index:200;animation:slideUp .3s ease;display:flex;align-items:center;gap:8px;box-shadow:var(--shadow)}
.toast.success{background:var(--green);color:#fff}
.toast.error{background:var(--red);color:#fff}

/* Modal */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:150;display:flex;align-items:flex-end;justify-content:center}
.modal{background:var(--bg2);border-radius:var(--radius) var(--radius) 0 0;padding:24px;width:100%;max-width:500px;max-height:85vh;overflow-y:auto;animation:slideUp .3s ease}
.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.modal-title{font-size:18px;font-weight:700}
.modal-close{background:none;border:none;color:var(--text2);font-size:20px;cursor:pointer}

/* Responsive */
@media(min-width:640px){
  .stats-grid{grid-template-columns:repeat(4,1fr)}
  .alphabet-grid{grid-template-columns:repeat(8,1fr)}
  .sections-grid{grid-template-columns:repeat(2,1fr)}
  .badges-grid{grid-template-columns:repeat(4,1fr)}
  .nav{position:fixed;top:0;bottom:auto;border-top:none;border-bottom:1px solid var(--bg3)}
  .main{padding-top:72px;padding-bottom:24px}
}

/* Sticking Indicator */
.sticking-display{display:flex;gap:4px;justify-content:center;margin:8px 0}
.sticking-hand{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;font-family:var(--mono);transition:.15s}
.sticking-hand.R{background:rgba(59,130,246,.2);color:var(--blue)}
.sticking-hand.L{background:rgba(239,68,68,.2);color:var(--red)}
.sticking-hand.active{transform:scale(1.3);box-shadow:0 0 12px currentColor}

/* Drum notation lines */
.drum-notation{font-family:var(--mono);font-size:13px;line-height:1.6;white-space:pre;overflow-x:auto;padding:12px;background:var(--bg);border-radius:var(--radius-sm)}
.drum-notation .hh{color:var(--cyan)}
.drum-notation .sn{color:var(--blue)}
.drum-notation .bd{color:var(--red)}
.drum-notation .gh{color:var(--purple)}

/* Quick Practice Button */
.quick-practice{position:relative;overflow:hidden;background:linear-gradient(135deg,var(--accent),#ef4444);padding:20px;border-radius:var(--radius);color:#000;text-align:center;cursor:pointer;transition:.2s;margin-bottom:16px}
.quick-practice:hover{transform:translateY(-2px);box-shadow:0 8px 32px rgba(245,158,11,.3)}
.quick-practice h3{font-size:18px;font-weight:800}
.quick-practice p{font-size:12px;opacity:.8}

/* Week days */
.week-days{display:flex;gap:4px;justify-content:center;margin:8px 0}
.week-day{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;background:var(--bg3);color:var(--text3)}
.week-day.practiced{background:var(--green);color:#fff}
.week-day.today{border:2px solid var(--accent)}

/* Search */
.search-input{width:100%;padding:10px 16px;background:var(--bg);border:1px solid var(--bg3);border-radius:var(--radius-sm);color:var(--text);font-size:14px;outline:none;font-family:var(--font)}
.search-input:focus{border-color:var(--accent)}
.search-input::placeholder{color:var(--text3)}