:root{--bg-deep: #09080a;--bg: #0e0d10;--surface: #171519;--surface-hover: #1e1b22;--card: #1a1720;--card-hover: #221e2a;--border: #2a2630;--border-subtle: #1f1c24;--amber: #e8a838;--amber-glow: #f5c242;--amber-dim: #a87620;--amber-bg: rgba(232, 168, 56, .08);--violet: #a78bfa;--violet-dim: #7c5cfc;--rose: #f472b6;--emerald: #34d399;--text: #f0ece4;--text-secondary: #a09a8e;--text-muted: #5c564a;--radius-sm: 6px;--radius: 10px;--radius-lg: 14px;--radius-xl: 20px;--font-display: "Instrument Serif", serif;--font-body: "Outfit", system-ui, sans-serif}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-body);background:var(--bg-deep);color:var(--text);min-height:100vh;overflow-x:hidden}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}select{font-family:inherit}a{color:var(--amber);text-decoration:none;transition:color .2s}a:hover{color:var(--amber-glow)}.bg-glow{position:fixed;border-radius:50%;filter:blur(120px);opacity:.15;pointer-events:none;z-index:0}.bg-glow-1{width:600px;height:600px;background:var(--amber);top:-200px;right:-100px}.bg-glow-2{width:500px;height:500px;background:var(--violet);bottom:-150px;left:-100px}.bg-grain{position:fixed;top:0;right:0;bottom:0;left:0;opacity:.03;pointer-events:none;z-index:0;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");background-repeat:repeat}.app{position:relative;z-index:1;min-height:100vh;display:flex;flex-direction:column}.tooltip-toggle-wrap{position:fixed;top:16px;right:18px;z-index:30}.tooltip-toggle-btn{width:30px;height:30px;border-radius:999px;border:1px solid var(--border);background:var(--card);color:var(--text-secondary);font-size:.85rem;font-weight:700;line-height:1;transition:all .2s;box-shadow:0 4px 14px #00000040}.tooltip-toggle-btn:hover{background:var(--surface-hover);color:var(--text);border-color:var(--amber-dim)}.tooltip-toggle-btn.active{background:var(--amber-bg);color:var(--amber);border-color:var(--amber-dim)}.main{max-width:1000px;width:100%;margin:0 auto;padding:0 32px 80px;flex:1}.header{padding:56px 32px 44px;text-align:center}.header-content{max-width:1000px;margin:0 auto}.logo{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:12px}.logo-icon{font-size:2rem;color:var(--amber);filter:drop-shadow(0 0 20px rgba(232,168,56,.4))}.logo-text{font-family:var(--font-display);font-size:3rem;font-weight:400;letter-spacing:-.02em;background:linear-gradient(135deg,var(--text) 0%,var(--amber) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.tagline{font-size:1.05rem;color:var(--text-secondary);font-weight:300;letter-spacing:.02em}.mode-toggle-group{display:inline-flex;gap:2px;margin-top:12px;padding:3px;background:var(--card);border:1px solid var(--border);border-radius:999px}.mode-toggle-btn{padding:8px 16px;border-radius:999px;font-size:.82rem;font-weight:600;color:var(--text-secondary);transition:all .2s}.mode-toggle-btn:hover{color:var(--text);background:var(--surface-hover)}.mode-toggle-btn.active{background:var(--amber-bg);color:var(--amber)}.controls-panel{background:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:36px;margin-bottom:28px}.controls-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px;margin-bottom:32px}.control-group{display:flex;flex-direction:column;gap:8px}.tooltip-fill{display:block}.control-group.full-width{margin-top:12px}.control-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted)}.select-wrapper{position:relative}.select{width:100%;padding:12px 16px;background:var(--card);color:var(--text);border:1px solid var(--border);border-radius:var(--radius);font-size:1rem;font-weight:500;-webkit-appearance:none;-moz-appearance:none;appearance:none;cursor:pointer;transition:border-color .2s,box-shadow .2s}.select:hover{border-color:var(--amber-dim)}.select:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px #e8a83826}.select-wrapper:after{content:"▾";position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);pointer-events:none;font-size:.85rem}.toggle-group{display:flex;gap:2px;background:var(--card);border-radius:var(--radius);padding:3px;border:1px solid var(--border)}.toggle-btn{flex:1;padding:10px 14px;border-radius:calc(var(--radius) - 3px);font-size:.9rem;font-weight:500;color:var(--text-secondary);transition:all .2s}.toggle-btn:hover{color:var(--text);background:var(--surface-hover)}.toggle-btn.active{background:var(--amber-bg);color:var(--amber);box-shadow:0 0 12px #e8a83814}.chip-grid{display:flex;flex-wrap:wrap;gap:10px}.chip{display:flex;align-items:center;gap:8px;padding:10px 20px;background:var(--card);border:1px solid var(--border);border-radius:50px;font-size:.9rem;font-weight:500;color:var(--text-secondary);transition:all .2s;white-space:nowrap}.chip:hover{background:var(--card-hover);color:var(--text);border-color:var(--amber-dim)}.chip.active{background:#e8a8381f;border-color:var(--amber);color:var(--amber);box-shadow:0 0 20px #e8a8381a}.chip-icon{font-size:1rem;line-height:1}.tooltip-trigger{position:relative;display:inline-flex}.tooltip-trigger.tooltip-fill{display:block;width:100%}.tooltip-bubble{position:fixed;z-index:40;max-width:250px;padding:7px 10px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:.8rem;line-height:1.35;box-shadow:0 8px 22px #00000047;opacity:0;transform:translateY(2px) scale(.98);pointer-events:none;transition:opacity .16s ease,transform .16s ease}.tooltip-bubble.visible{opacity:1;transform:translateY(0) scale(1)}.tooltip-arrow{position:absolute;width:8px;height:8px;background:var(--surface);border-left:1px solid var(--border);border-top:1px solid var(--border);transform:rotate(45deg);left:calc(50% - 4px)}.tooltip-bubble.top .tooltip-arrow{bottom:-5px;border-left:none;border-top:none;border-right:1px solid var(--border);border-bottom:1px solid var(--border)}.tooltip-bubble.bottom .tooltip-arrow{top:-5px}.generate-section{display:flex;flex-direction:column;align-items:center;gap:12px;margin-top:28px;padding-top:24px;border-top:1px solid var(--border-subtle)}.generate-btn{position:relative;padding:14px 48px;background:linear-gradient(135deg,var(--amber) 0%,var(--amber-glow) 100%);color:var(--bg-deep);font-size:1.05rem;font-weight:600;letter-spacing:.02em;border-radius:50px;transition:all .3s;box-shadow:0 2px 20px #e8a83840,0 0 40px #e8a8381a;overflow:hidden}.generate-btn:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(135deg,transparent 0%,rgba(255,255,255,.15) 50%,transparent 100%);opacity:0;transition:opacity .3s}.generate-btn:hover:not(:disabled):before{opacity:1}.generate-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 4px 30px #e8a83859,0 0 60px #e8a83826}.generate-btn:active:not(:disabled){transform:translateY(0)}.generate-btn:disabled{opacity:.5;cursor:not-allowed}.generate-icon{margin-right:8px;display:inline-block}.generate-btn.generating .generate-icon{display:none}.generate-spinner{display:inline-block;width:20px;height:20px;border:2px solid rgba(9,8,10,.3);border-top-color:var(--bg-deep);border-radius:50%;animation:spin .6s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.gens-remaining{font-size:.8rem;color:var(--text-muted)}.result-panel{animation:fadeInUp .5s ease-out;background:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:36px}.diagram-toggle{display:inline-flex;gap:2px;margin-bottom:18px;padding:3px;background:var(--card);border:1px solid var(--border);border-radius:999px}.diagram-toggle-btn{padding:8px 16px;border-radius:999px;font-size:.82rem;font-weight:600;color:var(--text-secondary);transition:all .2s}.diagram-toggle-btn:hover{color:var(--text);background:var(--surface-hover)}.diagram-toggle-btn.active{background:var(--amber-bg);color:var(--amber)}@keyframes fadeInUp{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.chord-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:20px}.piano-view{display:flex;flex-direction:column;gap:14px;margin-bottom:20px}.compact-chord-strip{display:flex;align-items:center;flex-wrap:wrap;gap:8px;min-height:34px}.compact-chord-pill{padding:7px 12px;border-radius:999px;border:1px solid var(--border);background:var(--card);color:var(--text-secondary);font-size:.82rem;font-weight:600;line-height:1;transition:all .2s;white-space:nowrap}.compact-chord-pill:hover{color:var(--text);border-color:var(--chord-color)}.compact-chord-pill.active{border-color:var(--chord-color);color:var(--chord-color);background:color-mix(in srgb,var(--chord-color) 12%,var(--card))}.compact-chord-pill.new-key{border-color:var(--amber-dim)}.piano-keyboard-shell{padding:14px;border-radius:var(--radius-lg);border:1px solid var(--border);background:linear-gradient(180deg,#242028,#16141b)}.piano-keyboard-scroll{width:100%;overflow-x:auto}.piano-keyboard{width:100%;min-width:560px;display:block}.piano-key{transition:fill .1s ease-out,stroke .1s ease-out}.piano-note-label{font-family:var(--font-body);font-weight:700;letter-spacing:.01em;pointer-events:none;-webkit-user-select:none;user-select:none}.piano-note-label.white{font-size:11px}.piano-note-label.black{font-size:10px}.chord-grid.eight-chords{grid-template-columns:repeat(4,1fr)}.chord-card{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:32px 16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);cursor:pointer;transition:all .25s;animation:chordAppear .4s ease-out backwards;overflow:hidden;min-height:130px}@keyframes chordAppear{0%{opacity:0;transform:scale(.9) translateY(8px)}to{opacity:1;transform:scale(1) translateY(0)}}.chord-card:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle at 50% 0%,var(--chord-color),transparent 70%);opacity:0;transition:opacity .3s}.chord-card:hover:before{opacity:.08}.chord-card:hover{border-color:var(--chord-color);transform:translateY(-2px);box-shadow:0 4px 20px #0000004d}.chord-card.active{border-color:var(--chord-color);box-shadow:0 0 20px color-mix(in srgb,var(--chord-color) 30%,transparent),inset 0 0 30px color-mix(in srgb,var(--chord-color) 5%,transparent)}.chord-card.active:before{opacity:.15}.chord-numeral{font-size:.8rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);position:relative}.chord-symbol{font-family:var(--font-display);font-size:2.2rem;color:var(--text);position:relative;transition:color .2s}.chord-card.active .chord-symbol{color:var(--chord-color)}.chord-notes{font-size:.78rem;color:var(--text-muted);letter-spacing:.05em;position:relative}.actions-bar{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg)}.actions-left,.actions-right{display:flex;align-items:center;gap:12px}.actions-left{flex-wrap:wrap}.play-area{display:flex;align-items:center;gap:10px}.action-btn{padding:8px 16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);font-size:.85rem;font-weight:500;color:var(--text-secondary);transition:all .2s}.action-btn:hover{background:var(--card-hover);color:var(--text);border-color:var(--amber-dim)}.action-btn.accent{background:#e8a8381a;border-color:var(--amber-dim);color:var(--amber)}.action-btn.accent:hover{background:#e8a8382e;border-color:var(--amber)}.play-btn{width:40px;height:40px;padding:0;display:flex;align-items:center;justify-content:center;border-radius:50%;font-size:1rem;background:var(--amber-bg);border-color:var(--amber-dim);color:var(--amber)}.play-btn:hover{background:#e8a83833;border-color:var(--amber)}.play-btn.playing{background:#e8a83826;animation:pulse 2s ease-in-out infinite}.load-progress-bar{width:80px;height:6px;background:var(--surface);border-radius:3px;overflow:hidden;border:1px solid var(--border)}.load-progress-fill{height:100%;background:var(--amber);border-radius:3px;transition:width .3s ease-out}@keyframes pulse{0%,to{box-shadow:0 0 #e8a83833}50%{box-shadow:0 0 0 8px #e8a83800}}.tempo-display{font-size:.85rem;color:var(--text-muted);font-variant-numeric:tabular-nums}.history-panel{margin-top:24px}.history-title{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:12px}.history-list{display:flex;flex-direction:column;gap:6px}.history-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--surface);border:1px solid var(--border-subtle);border-radius:var(--radius);text-align:left;transition:all .2s}.history-item:hover{background:var(--surface-hover);border-color:var(--border)}.history-chords{font-family:var(--font-display);font-size:.95rem;color:var(--text)}.history-meta{font-size:.75rem;color:var(--text-muted);white-space:nowrap}.footer{text-align:center;padding:32px 24px;font-size:.8rem;color:var(--text-muted)}.heart{color:var(--rose)}@media(max-width:640px){.header{padding:32px 16px 28px}.logo-text{font-size:2.2rem}.tagline{font-size:.9rem}.main{padding:0 16px 60px}.controls-panel{padding:20px}.controls-grid{grid-template-columns:1fr;gap:16px}.chip-grid{gap:6px}.chip{padding:6px 12px;font-size:.8rem}.chord-grid{grid-template-columns:repeat(2,1fr);gap:8px}.chord-grid.eight-chords{grid-template-columns:repeat(2,1fr)}.chord-card{padding:16px 8px}.chord-symbol{font-size:1.3rem}.actions-bar{flex-direction:column;gap:12px}.history-item{flex-direction:column;align-items:flex-start;gap:4px}.piano-keyboard{min-width:unset}.piano-note-label.white{font-size:9px}.piano-note-label.black{font-size:8px}}.key-change-divider{grid-column:1 / -1;display:flex;align-items:center;gap:12px;padding:4px 0}.key-change-divider:before,.key-change-divider:after{content:"";flex:1;height:1px;background:linear-gradient(90deg,transparent,var(--accent),transparent)}.key-change-label{font-size:.8rem;font-weight:600;color:var(--accent);white-space:nowrap;letter-spacing:.05em}.chord-card.new-key{border-color:var(--accent);box-shadow:0 0 12px -4px var(--accent)}.key-change-divider.compact{grid-column:auto;flex:1 0 100%;padding:2px 0 0}.volume-control{display:inline-flex;align-items:center;gap:10px;padding:6px 10px;background:#120f14;border:1px solid var(--border);border-radius:999px}.volume-label{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted)}.volume-slider{width:120px;accent-color:var(--amber);cursor:pointer}.volume-slider::-webkit-slider-runnable-track{height:4px;border-radius:999px;background:#2a2430}.volume-slider::-webkit-slider-thumb{-webkit-appearance:none;margin-top:-6px;width:16px;height:16px;border-radius:50%;border:1px solid #3f2f11;background:linear-gradient(135deg,var(--amber),var(--amber-glow));box-shadow:0 0 12px #e8a83859}.volume-slider::-moz-range-track{height:4px;border-radius:999px;background:#2a2430}.volume-slider::-moz-range-thumb{width:14px;height:14px;border-radius:50%;border:1px solid #3f2f11;background:linear-gradient(135deg,var(--amber),var(--amber-glow));box-shadow:0 0 12px #e8a83859}.volume-value{min-width:34px;text-align:right;font-size:.8rem;color:var(--amber);font-variant-numeric:tabular-nums}@media(max-width:640px){.volume-slider{width:100px}}