:root{--bg:#07070f;--surface:#0c0c1c;--surface-2:#111128;--surface-3:#16163a;--border:#ffffff0e;--border-md:#ffffff1a;--border-focus:#7b5cfa8c;--accent:#7b5cfa;--accent-2:#9b80ff;--accent-dim:#7b5cfa1a;--accent-dim-2:#7b5cfa2e;--accent-glow:0 0 28px #7b5cfa59;--green:#22c55e;--green-dim:#22c55e1a;--red:#ef4444;--red-dim:#ef44441a;--amber:#f59e0b;--t1:#eeeef8;--t2:#8b8bac;--t3:#44445e;--r-xs:6px;--r-sm:8px;--r-md:12px;--r-lg:16px;--r-xl:20px;--r-2xl:24px;--r-full:9999px;--ease:.16s ease;--ease-out:.28s cubic-bezier(.22, 1, .36, 1);font-family:Inter,system-ui,sans-serif}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--t1);-webkit-font-smoothing:antialiased;min-height:100vh;overflow-x:hidden}::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:#ffffff12;border-radius:3px}.page{flex-direction:column;min-height:100vh;display:flex}.wrap{width:100%;max-width:680px;margin:0 auto;padding:0 20px}.site-header{z-index:100;border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(16px)saturate(1.4);backdrop-filter:blur(16px)saturate(1.4);background:#07070fd1;position:sticky;top:0}.header-inner{justify-content:space-between;align-items:center;max-width:680px;height:54px;margin:0 auto;padding:0 20px;display:flex}.brand{align-items:center;gap:9px;display:flex}.brand-logo{border-radius:7px;width:26px;height:26px}.brand-name{color:var(--t1);letter-spacing:-.02em;font-size:14px;font-weight:700}.header-chips{gap:6px;display:flex}.h-chip{border-radius:var(--r-full);letter-spacing:.01em;border:1px solid;align-items:center;gap:5px;padding:3px 9px;font-size:11px;font-weight:600;display:inline-flex}.h-chip.ok{background:var(--green-dim);color:var(--green);border-color:#22c55e38}.h-chip.err{background:var(--red-dim);color:var(--red);border-color:#ef444438}.h-dot{background:currentColor;border-radius:50%;width:5px;height:5px}.main{flex:1}.hero{text-align:center;padding:56px 20px 36px}.hero-badge{background:var(--accent-dim);border-radius:var(--r-full);color:var(--accent-2);letter-spacing:.03em;border:1px solid #7b5cfa38;align-items:center;gap:6px;margin-bottom:18px;padding:4px 13px;font-size:11.5px;font-weight:600;display:inline-flex}.hero-title{letter-spacing:-.035em;color:var(--t1);margin-bottom:11px;font-size:clamp(26px,5.5vw,40px);font-weight:800;line-height:1.1}.hero-sub{color:var(--t2);max-width:400px;margin:0 auto;font-size:15.5px;line-height:1.65}.alert{border-radius:var(--r-lg);border:1px solid;align-items:flex-start;gap:10px;margin-bottom:14px;padding:11px 15px;font-size:13.5px;line-height:1.5;animation:.2s fadein;display:flex}.alert-icon{flex-shrink:0}.alert.error{background:var(--red-dim);color:#fca5a5;border-color:#ef444433}.alert.success{background:var(--green-dim);color:#86efac;border-color:#22c55e33}.alert.warn{color:var(--amber);background:#f59e0b12;border-color:#f59e0b33}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-2xl);transition:border-color var(--ease);margin-bottom:14px;padding:26px}.divider{background:var(--border);height:1px;margin:22px 0}.label{color:var(--t3);letter-spacing:.09em;text-transform:uppercase;align-items:center;gap:7px;margin-bottom:11px;font-size:10.5px;font-weight:700;display:flex}.chips-row{flex-wrap:wrap;gap:6px;margin-top:8px;display:flex}.example-chip{border:1px solid var(--border);border-radius:var(--r-full);color:var(--t2);cursor:pointer;transition:all var(--ease);white-space:nowrap;background:0 0;padding:5px 12px;font-family:inherit;font-size:12px;font-weight:500}.example-chip:hover:not(:disabled){border-color:var(--border-md);color:var(--t1);background:#ffffff08}.example-chip:disabled{opacity:.4;cursor:not-allowed}.prompt-area{border:1px solid var(--border);border-radius:var(--r-lg);width:100%;min-height:108px;color:var(--t1);resize:vertical;transition:border-color var(--ease), box-shadow var(--ease), background var(--ease);background:#ffffff05;outline:none;padding:13px 15px;font-family:inherit;font-size:14.5px;line-height:1.65}.prompt-area::placeholder{color:var(--t3)}.prompt-area:focus{border-color:var(--border-focus);background:#7b5cfa08;box-shadow:0 0 0 3px #7b5cfa17}.char-hint{text-align:right;color:var(--t3);margin-top:5px;font-size:11.5px}.char-hint.warn{color:var(--amber)}.count-wrap{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.presets{gap:5px;display:flex}.preset{border:1px solid var(--border);border-radius:var(--r-sm);color:var(--t2);cursor:pointer;transition:all var(--ease);background:0 0;padding:5px 14px;font-family:inherit;font-size:13px;font-weight:600}.preset:hover:not(:disabled){border-color:var(--border-md);color:var(--t1)}.preset.on{background:var(--accent-dim);color:var(--accent-2);border-color:#7b5cfa66}.preset:disabled{opacity:.4;cursor:not-allowed}.stepper{border:1px solid var(--border);border-radius:var(--r-sm);height:34px;transition:border-color var(--ease);background:#ffffff06;align-items:center;gap:1px;padding:3px;display:flex}.stepper:focus-within{border-color:var(--border-focus)}.step-btn{width:26px;height:26px;color:var(--t2);cursor:pointer;transition:all var(--ease);background:0 0;border:none;border-radius:5px;justify-content:center;align-items:center;font-family:inherit;font-size:15px;display:flex}.step-btn:hover:not(:disabled){color:var(--t1);background:#ffffff0f}.step-btn:disabled{opacity:.28;cursor:not-allowed}.step-val{text-align:center;width:36px;color:var(--t1);background:0 0;border:none;outline:none;font-family:inherit;font-size:13.5px;font-weight:700}.btn{border-radius:var(--r-md);cursor:pointer;transition:all var(--ease);white-space:nowrap;border:none;justify-content:center;align-items:center;gap:7px;font-family:inherit;font-weight:600;display:inline-flex}.btn:disabled{opacity:.42;cursor:not-allowed!important;transform:none!important}.btn-primary{background:var(--accent);color:#fff;width:100%;padding:13px 22px;font-size:14.5px}.btn-primary:hover:not(:disabled){background:var(--accent-2);box-shadow:var(--accent-glow);transform:translateY(-1px)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{border:1px solid 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spin}.spin-lg{border-width:3px;border-color:var(--accent-dim);border-top-color:var(--accent);width:40px;height:40px}.steps-wrap{align-items:flex-start;padding:24px 0 20px;display:flex;position:relative}.steps-line-bg{background:var(--border);height:1px;position:absolute;top:38px;left:12.5%;right:12.5%}.steps-line-fill{background:var(--accent);opacity:.7;height:1px;transition:width .5s;position:absolute;top:38px;left:12.5%}.step-item{z-index:1;flex-direction:column;flex:1;align-items:center;gap:7px;display:flex}.step-dot{border:1.5px solid var(--border-md);background:var(--surface);width:28px;height:28px;color:var(--t3);border-radius:50%;justify-content:center;align-items:center;font-size:10.5px;transition:all .3s;display:flex}.step-dot.active{border-color:var(--accent);background:var(--accent-dim);color:var(--accent-2);animation:1.8s ease-in-out infinite pulse-dot;box-shadow:0 0 12px #7b5cfa66}.step-dot.done{border-color:var(--green);background:var(--green-dim);color:var(--green)}.step-lbl{color:var(--t3);text-align:center;font-size:10.5px;font-weight:500}.step-lbl.active{color:var(--accent-2)}.step-lbl.done{color:var(--green)}.loading-panel{text-align:center;flex-direction:column;align-items:center;gap:14px;padding:56px 20px;animation:.25s fadein;display:flex}.loading-title{color:var(--t1);font-size:15px;font-weight:600}.loading-sub{color:var(--t2);font-size:13px;line-height:1.55}.prereqs{border-radius:var(--r-xl);background:#f59e0b0f;border:1px solid #f59e0b33;margin-bottom:14px;padding:14px 18px}.prereqs-title{color:var(--amber);margin-bottom:9px;font-size:12.5px;font-weight:600}.prereqs-list{flex-wrap:wrap;gap:7px;display:flex}.prereq{border-radius:var(--r-full);padding:3px 10px;font-size:11.5px;font-weight:600}.prereq.ok{background:var(--green-dim);color:var(--green)}.prereq.fail{background:var(--red-dim);color:var(--red)}.songs-wrap{animation:slideup .35s var(--ease-out)}.songs-head{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.songs-head-left{align-items:center;gap:9px;display:flex}.songs-title{font-size:15px;font-weight:700}.songs-badge{background:var(--accent-dim);border-radius:var(--r-full);color:var(--accent-2);border:1px solid #7b5cfa33;padding:2px 9px;font-size:11.5px;font-weight:600}.songs-head-right{align-items:center;display:flex}.song-list{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-xl);overflow:hidden}.song-row{cursor:pointer;transition:background var(--ease);border-bottom:1px solid var(--border);-webkit-user-select:none;user-select:none;align-items:center;gap:13px;padding:11px 16px;animation:.22s both rowin;display:flex}.song-row:last-child{border-bottom:none}.song-row:hover{background:#ffffff05}.song-row.on{background:#7b5cfa0d}.song-num{width:18px;color:var(--t3);text-align:right;font-variant-numeric:tabular-nums;flex-shrink:0;font-size:11.5px;font-weight:500}.song-icon{background:var(--accent-dim);width:34px;height:34px;transition:all var(--ease);border:1px solid #7b5cfa26;border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;display:flex}.song-row.on .song-icon{background:var(--accent-dim-2);border-color:#7b5cfa66}.song-info{flex:1;min-width:0}.song-title{color:var(--t1);white-space:nowrap;text-overflow:ellipsis;font-size:13.5px;font-weight:500;line-height:1.3;overflow:hidden}.song-artist{color:var(--t2);white-space:nowrap;text-overflow:ellipsis;margin-top:2px;font-size:12px;overflow:hidden}.song-check{border:1.5px solid var(--border-md);width:19px;height:19px;transition:all var(--ease);color:#0000;border-radius:5px;flex-shrink:0;justify-content:center;align-items:center;font-size:10px;display:flex}.song-row.on .song-check{background:var(--accent);border-color:var(--accent);color:#fff}.dl-footer{flex-direction:column;gap:11px;padding-top:16px;display:flex}.dl-meta-row{justify-content:space-between;align-items:center;gap:10px;display:flex}.dl-count{color:var(--t2);font-size:13px}.dl-count strong{color:var(--t1);font-weight:600}.fmt-badge{border:1px solid var(--border);border-radius:var(--r-full);color:var(--t3);letter-spacing:.02em;background:#ffffff0a;align-items:center;gap:5px;padding:3px 9px;font-size:11px;font-weight:600;display:inline-flex}.dl-actions{align-items:center;gap:9px;display:flex}.dl-actions .btn-primary{flex:1}.quiz-wrap{animation:.25s fadein}.quiz-meta{justify-content:space-between;align-items:center;margin-bottom:18px;display:flex}.quiz-step-lbl{color:var(--accent-2);letter-spacing:.08em;text-transform:uppercase;font-size:11px;font-weight:700}.quiz-step-num{color:var(--t3);font-size:11.5px}.quiz-bar{background:var(--border);border-radius:2px;height:3px;margin-bottom:26px;overflow:hidden}.quiz-bar-fill{background:var(--accent);height:100%;transition:width .3s var(--ease-out);border-radius:2px;box-shadow:0 0 8px #7b5cfa80}.quiz-q{letter-spacing:-.02em;color:var(--t1);margin-bottom:18px;font-size:19px;font-weight:700;line-height:1.3}.quiz-grid{grid-template-columns:repeat(2,1fr);gap:7px;margin-bottom:18px;display:grid}.quiz-opt{border:1px solid var(--border);border-radius:var(--r-md);text-align:left;color:var(--t2);cursor:pointer;transition:all var(--ease);background:0 0;align-items:center;gap:7px;padding:11px 13px;font-family:inherit;font-size:13px;font-weight:500;display:flex}.quiz-opt:hover{border-color:var(--border-md);color:var(--t1);background:#ffffff06;transform:translateY(-1px)}.quiz-opt.on{background:var(--accent-dim-2);color:var(--t1);border-color:#7b5cfa73}.quiz-custom-lbl{color:var(--t3);letter-spacing:.08em;text-transform:uppercase;margin-bottom:7px;font-size:10px;font-weight:700}.quiz-input{border:1px solid var(--border);border-radius:var(--r-md);width:100%;color:var(--t1);transition:all var(--ease);background:#ffffff05;outline:none;margin-bottom:22px;padding:10px 13px;font-family:inherit;font-size:13.5px}.quiz-input::placeholder{color:var(--t3)}.quiz-input:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px #7b5cfa14}.quiz-nav{border-top:1px solid var(--border);justify-content:space-between;align-items:center;gap:8px;padding-top:18px;display:flex}.quiz-nav-right{align-items:center;gap:7px;display:flex}.quiz-gen-btn{padding:9px 16px;font-size:13.5px;width:auto!important}.site-footer{border-top:1px solid var(--border);text-align:center;margin-top:auto;padding:20px}.site-footer p{color:var(--t3);font-size:11.5px;line-height:1.7}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadein{0%{opacity:0}to{opacity:1}}@keyframes slideup{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}@keyframes rowin{0%{opacity:0;transform:translate(-6px)}to{opacity:1;transform:translate(0)}}@keyframes pulse-dot{0%,to{box-shadow:0 0 10px #7b5cfa59}50%{box-shadow:0 0 20px #7b5cfaa6}}@media (max-width:600px){.hero{padding:36px 20px 28px}.hero-title{font-size:24px}.card{padding:18px}.count-wrap{flex-direction:column;align-items:flex-start}.quiz-grid{grid-template-columns:1fr}.dl-actions{flex-direction:column}.dl-actions .btn-primary,.dl-actions .btn-danger{justify-content:center;width:100%}.step-lbl{display:none}}