:root{--bg: #0b0f17;--panel: #131b26;--panel-subtle: #182232;--panel-hover: #223043;--panel-active: #2a3b52;--ink: #f8fafc;--ink-secondary: #cbd5e1;--muted: #8295ab;--line: #202d3f;--line-light: #16202d;--line-active: #2e415a;--accent: #14b8a6;--accent-hover: #2dd4bf;--accent-subtle: rgba(20, 184, 166, .15);--accent-glow: rgba(20, 184, 166, .25);--accent-ink: #042f2c;--color-a: #38bdf8;--color-a-hover: #7dd3fc;--color-a-subtle: rgba(56, 189, 248, .15);--color-b: #34d399;--color-b-hover: #6ee7b7;--color-b-subtle: rgba(52, 211, 153, .15);--warn: #f59e0b;--warn-subtle: rgba(245, 158, 11, .15);--danger: #ef4444;--danger-subtle: rgba(239, 68, 68, .15);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--radius-full: 9999px;--shadow-sm: 0 1px 3px 0 rgb(0 0 0 / .35);--shadow-md: 0 4px 8px -1px rgb(0 0 0 / .45), 0 2px 4px -2px rgb(0 0 0 / .35);--shadow-lg: 0 12px 24px -4px rgb(0 0 0 / .6);--font: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;color-scheme:dark}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.studio{max-width:1280px;margin:0 auto;padding:max(20px,env(safe-area-inset-top)) 24px 64px}.studio-header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;margin-bottom:22px;padding-bottom:18px;border-bottom:1px solid var(--line)}.studio-brand{display:flex;align-items:center;gap:14px}.studio-logo{width:44px;height:44px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--accent) 0%,#0284c7 100%);display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 2px 10px var(--accent-subtle);flex-shrink:0}.studio-header h1{font-size:1.65rem;font-weight:700;letter-spacing:-.025em;margin:0;line-height:1.2;color:var(--ink)}.studio-subtitle{color:var(--muted);font-size:.9rem;margin:3px 0 0}.studio-header-actions{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.privacy-badge{display:inline-flex;align-items:center;gap:7px;padding:6px 14px;background:var(--accent-subtle);color:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);border-radius:var(--radius-full);font-size:.82rem;font-weight:600;letter-spacing:.01em}.privacy-pulse{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 6px var(--accent)}.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-lg);padding:20px 22px;margin-bottom:18px;box-shadow:var(--shadow-sm);transition:border-color .15s ease}.panel-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;flex-wrap:wrap;gap:10px}.panel h2{font-size:1.18rem;font-weight:600;margin:0;letter-spacing:-.015em;color:var(--ink)}.hint{color:var(--muted);font-size:.88rem;margin:4px 0;line-height:1.45}.workstation-grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:20px}@media (min-width: 980px){.workstation-grid{grid-template-columns:1.05fr .95fr;align-items:start}}.workstation-col{display:flex;flex-direction:column;gap:18px}.drop{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:44px 24px;border:2px dashed var(--line);border-radius:var(--radius-lg);background:var(--panel-subtle);cursor:pointer;transition:all .2s ease;gap:10px}.drop:hover,.drop.over{border-color:var(--accent);background:var(--accent-subtle);box-shadow:0 0 20px #14b8a61f}.drop-icon{width:52px;height:52px;border-radius:var(--radius-full);background:var(--panel);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--accent);box-shadow:var(--shadow-sm);margin-bottom:4px}.drop-title{font-weight:600;font-size:1.1rem;color:var(--ink)}.drop-subtitle{color:var(--muted);font-size:.88rem;max-width:520px}.drop-formats{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;margin-top:4px}.drop-tag{font-size:.74rem;font-weight:600;text-transform:uppercase;padding:2px 7px;border-radius:var(--radius-sm);background:var(--panel);border:1px solid var(--line);color:var(--muted)}.drop input[type=file]{display:none}.features-preview{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-top:20px}.feature-card{background:var(--panel-subtle);border:1px solid var(--line);border-radius:var(--radius-md);padding:16px;display:flex;flex-direction:column;gap:6px}.feature-card-header{display:flex;align-items:center;gap:10px;font-weight:600;font-size:.95rem;color:var(--ink)}.feature-card-header svg{color:var(--accent)}.feature-card p{margin:0;font-size:.84rem;color:var(--muted);line-height:1.45}.audio-meta-card{display:flex;align-items:center;justify-content:space-between;background:var(--panel-subtle);border:1px solid var(--line);border-radius:var(--radius-md);padding:14px 18px;flex-wrap:wrap;gap:14px;box-shadow:var(--shadow-sm)}.audio-meta-info{display:flex;align-items:center;gap:14px;min-width:200px}.audio-meta-icon{width:42px;height:42px;border-radius:var(--radius-sm);background:var(--accent-subtle);border:1px solid color-mix(in srgb,var(--accent) 25%,transparent);color:var(--accent);display:flex;align-items:center;justify-content:center;flex-shrink:0}.audio-meta-title{font-weight:600;color:var(--ink);font-size:1.02rem;word-break:break-all}.audio-meta-tags{display:flex;gap:6px;margin-top:4px;flex-wrap:wrap}.meta-pill{font-size:.78rem;padding:2px 9px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);color:var(--ink-secondary);font-weight:500}.engines{list-style:none;margin:0;padding:0;display:grid;gap:12px}.engine-card{display:flex;justify-content:space-between;align-items:center;background:var(--panel-subtle);border:1px solid var(--line);border-radius:var(--radius-md);padding:15px 18px;gap:16px;flex-wrap:wrap;transition:all .15s ease}.engine-card:hover{border-color:color-mix(in srgb,var(--line) 50%,var(--accent));box-shadow:var(--shadow-sm)}.engine-card.featured{border-color:color-mix(in srgb,var(--accent) 40%,var(--line));background:linear-gradient(180deg,color-mix(in srgb,var(--accent-subtle) 30%,var(--panel-subtle)) 0%,var(--panel-subtle) 100%)}.engine-title-row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.engine-name{font-size:1.02rem;font-weight:600;color:var(--ink)}.badge{display:inline-flex;align-items:center;padding:2px 8px;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;border:1px solid var(--line);background:var(--panel)}.badge.browser-ready{background:var(--accent-subtle);border-color:transparent;color:var(--accent)}.badge.local-offline{background:var(--warn-subtle);border-color:transparent;color:var(--warn)}.badge.tag{background:var(--panel-hover);color:var(--ink-secondary)}.badge.recommended{background:#14b8a640;color:var(--accent-hover);border-color:color-mix(in srgb,var(--accent) 50%,transparent)}.engine-desc{font-size:.85rem;color:var(--muted);margin:6px 0 0;line-height:1.4}.presets-bar{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:14px}.preset-chip{font-size:.82rem;padding:4px 10px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--panel-subtle);color:var(--ink-secondary);cursor:pointer;transition:all .15s ease}.preset-chip:hover{background:var(--panel-hover);color:var(--ink)}.preset-chip.active{background:var(--accent-subtle);border-color:var(--accent);color:var(--accent);font-weight:600}.advanced-settings-box{background:var(--panel-subtle);border:1px solid var(--line);border-radius:var(--radius-md);padding:12px 16px;margin-bottom:14px}.advanced-settings-box summary{cursor:pointer;font-weight:600;font-size:.9rem;color:var(--ink);-webkit-user-select:none;user-select:none}.advanced-settings-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px;margin-top:14px;font-size:.86rem}.versions{list-style:none;margin:0;padding:0;display:grid;gap:12px}.version-card{display:flex;justify-content:space-between;align-items:center;background:var(--panel-subtle);border:1px solid var(--line);border-radius:var(--radius-md);padding:14px 18px;gap:14px;flex-wrap:wrap;transition:border-color .15s ease}.version-card:hover{border-color:var(--line-active)}.version-card.is-active-a{border-left:3px solid var(--color-a)}.version-card.is-active-b{border-left:3px solid var(--color-b)}.version-info{display:flex;flex-direction:column;gap:4px;min-width:180px;flex:1}.version-title{font-weight:600;font-size:1rem;color:var(--ink)}.version-meta{display:flex;gap:8px;font-size:.82rem;color:var(--muted);align-items:center;flex-wrap:wrap}.actions{display:flex;gap:6px;align-items:center;flex-wrap:wrap}button{font-family:inherit;font-size:.88rem;font-weight:500;border-radius:var(--radius-sm);padding:8px 14px;border:1px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px;transition:all .15s ease;-webkit-user-select:none;user-select:none;min-height:38px}button:hover:not(:disabled){background:var(--panel-hover);border-color:var(--muted)}button:active:not(:disabled){transform:translateY(1px)}button.btn-primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent);font-weight:600}button.btn-primary:hover:not(:disabled){background:var(--accent-hover);border-color:var(--accent-hover);color:var(--accent-ink);box-shadow:0 0 12px var(--accent-glow)}button.btn-secondary{background:var(--panel-subtle);color:var(--ink);border-color:var(--line)}button.btn-secondary:hover:not(:disabled){background:var(--panel-hover);border-color:var(--muted)}button.btn-a{min-width:34px;padding:6px 10px;font-weight:700;font-size:.84rem;border-color:color-mix(in srgb,var(--color-a) 40%,var(--line));color:var(--color-a)}button.btn-a:hover:not(:disabled){background:var(--color-a-subtle)}button.btn-a[aria-pressed=true],button.btn-a.active{background:var(--color-a);color:#041b2d;border-color:var(--color-a);box-shadow:0 0 8px #38bdf866}button.btn-b{min-width:34px;padding:6px 10px;font-weight:700;font-size:.84rem;border-color:color-mix(in srgb,var(--color-b) 40%,var(--line));color:var(--color-b)}button.btn-b:hover:not(:disabled){background:var(--color-b-subtle)}button.btn-b[aria-pressed=true],button.btn-b.active{background:var(--color-b);color:#022016;border-color:var(--color-b);box-shadow:0 0 8px #34d39966}button.btn-polish{border-color:color-mix(in srgb,var(--accent) 50%,var(--line));color:var(--accent);font-weight:600}button.btn-polish:hover:not(:disabled),button.btn-polish[aria-pressed=true]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}button.link{background:transparent;border-color:transparent;color:var(--muted);padding:4px 8px;font-size:.84rem;min-height:auto}button.link:hover:not(:disabled){color:var(--ink);background:var(--panel-hover)}button.link.danger:hover:not(:disabled){color:var(--danger);background:var(--danger-subtle)}button:disabled{opacity:.5;cursor:not-allowed}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.field{display:grid;gap:6px;margin:12px 0;font-size:.88rem;color:var(--ink-secondary);font-weight:500}.field select{font-family:inherit;font-size:.88rem;min-height:38px;padding:6px 12px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer;outline:none;transition:border-color .15s ease}.field select:focus{border-color:var(--accent)}input[type=range]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:100%;height:6px;border-radius:var(--radius-full);background:var(--line);outline:none;margin:8px 0}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:var(--accent);cursor:pointer;border:2px solid var(--panel);box-shadow:0 0 6px var(--accent-glow);transition:transform .1s ease}input[type=range]::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--accent);cursor:pointer;border:2px solid var(--panel);box-shadow:0 0 6px var(--accent-glow)}input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}.busy{display:flex;align-items:center;gap:12px;padding:14px 18px;background:var(--accent-subtle);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);border-radius:var(--radius-md);margin-top:14px;color:var(--accent);font-weight:600;font-size:.92rem;flex-wrap:wrap}.busy progress{flex:1;min-width:140px;height:8px;border-radius:var(--radius-full);overflow:hidden;border:none;background:color-mix(in srgb,var(--accent) 20%,transparent)}.busy progress::-webkit-progress-bar{background:color-mix(in srgb,var(--accent) 20%,transparent)}.busy progress::-webkit-progress-value{background:var(--accent);border-radius:var(--radius-full)}.busy progress::-moz-progress-bar{background:var(--accent);border-radius:var(--radius-full)}.alert{padding:12px 16px;border-radius:var(--radius-md);background:var(--danger-subtle);border:1px solid color-mix(in srgb,var(--danger) 30%,transparent);color:var(--danger);font-size:.9rem;margin:12px 0}.warn{padding:12px 16px;border-radius:var(--radius-md);background:var(--warn-subtle);border:1px solid color-mix(in srgb,var(--warn) 30%,transparent);color:var(--warn);font-size:.9rem;margin:12px 0}.status-notice{padding:12px 16px;border-radius:var(--radius-md);background:#0ea5e91f;border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);color:var(--accent);font-size:.9rem;margin:12px 0;display:flex;align-items:center;gap:8px}.polish-panel{background:var(--panel);border:1px solid var(--accent);border-radius:var(--radius-lg);padding:20px 22px;margin-top:14px;box-shadow:var(--shadow-md)}.polish-header{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:14px;flex-wrap:wrap;gap:8px}.polish-title{display:flex;align-items:center;gap:8px;font-size:1.15rem;font-weight:700;margin:0;color:var(--ink)}.chip-group{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0 14px}.chip{padding:5px 12px;border-radius:var(--radius-full);font-size:.82rem;font-weight:600;border:1px solid var(--line);background:var(--panel-subtle);color:var(--ink-secondary);cursor:pointer;transition:all .15s ease;min-height:auto}.chip:hover{background:var(--panel-hover);border-color:var(--muted);color:var(--ink)}.chip.active{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}.eq-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:12px;margin-top:12px}.eq-card{background:var(--panel-subtle);border:1px solid var(--line);border-radius:var(--radius-md);padding:12px;display:flex;flex-direction:column;gap:6px}.eq-card-header{display:flex;justify-content:space-between;align-items:center;font-size:.82rem;font-weight:600;color:var(--ink)}.eq-val-badge{font-size:.78rem;padding:1px 6px;border-radius:var(--radius-sm);background:var(--panel);font-weight:700}.eq-val-badge.positive{color:var(--accent)}.eq-val-badge.negative{color:var(--warn)}.eq-val-badge.zero{color:var(--muted)}.ab-player{background:var(--panel-subtle);border:1px solid var(--line);border-radius:var(--radius-lg);padding:18px 20px;margin-top:14px}.waveform-container{border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--line);background:#080c12;position:relative}.ab-scrub{margin:10px 0 6px}.ab-time-row{display:flex;justify-content:space-between;font-size:.82rem;color:var(--muted);font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace}.ab-controls{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:12px}.ab-switch-group{display:flex;border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}.ab-switch-group button{border-radius:0;border:none;min-height:40px;padding:8px 16px}.ab-switch-group button:first-child{border-right:1px solid var(--line)}.dot{width:8px;height:8px;border-radius:50%;display:inline-block;margin-right:4px}.dot-a{background:var(--color-a);box-shadow:0 0 6px var(--color-a)}.dot-b{background:var(--color-b);box-shadow:0 0 6px var(--color-b)}.pair{display:grid;gap:12px;grid-template-columns:1fr}@media (min-width: 580px){.pair{grid-template-columns:1fr 1fr}}.second{border-top:1px solid var(--line);margin-top:14px;padding-top:14px}.action-dropdown{position:relative;display:inline-block}.app-footer{margin-top:24px;padding-top:14px;border-top:1px solid var(--line);font-size:.84rem;color:var(--muted)}.app-footer summary{cursor:pointer;font-weight:500;color:var(--ink-secondary)}.app-footer a{color:var(--accent);text-decoration:none}.app-footer a:hover{text-decoration:underline}@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}