:root{--bg:#0b0c0f;--panel:#14161a;--panel2:#1b1e23;--line:#30343c;--text:#f4f2eb;--muted:#a8a9a5;--accent:#c9ff4a;--cyan:#66d9b8;--ink:#11140b}
*{box-sizing:border-box}html{color-scheme:dark}body{margin:0;background:radial-gradient(circle at 86% 2%,rgba(201,255,74,.08),transparent 30%),var(--bg);color:var(--text);font:15px/1.45 Inter,Segoe UI,Arial,sans-serif}button,input,select,textarea{font:inherit}button{min-height:42px;border:1px solid var(--line);border-radius:10px;padding:9px 13px;background:var(--panel2);color:var(--text);cursor:pointer}button:hover,button:focus-visible{border-color:var(--accent)}button:disabled{opacity:.48;cursor:not-allowed}.primary{background:var(--accent);border-color:var(--accent);color:var(--ink);font-weight:900}.quiet{min-height:36px;padding:6px 10px}.wide{width:100%;margin-top:14px}.app-header{position:sticky;top:0;z-index:20;min-height:66px;padding:10px max(18px,env(safe-area-inset-left));display:flex;align-items:center;gap:22px;border-bottom:1px solid var(--line);background:rgba(11,12,15,.92);backdrop-filter:blur(16px)}.brand{color:var(--text);text-decoration:none;font-size:20px;font-weight:950;letter-spacing:-.04em}.brand b{color:var(--accent)}.header-copy{display:flex;flex-direction:column}.header-copy small{color:var(--muted)}.app-header>button{margin-left:auto}main{width:min(1480px,calc(100% - 32px));margin:0 auto;padding:18px 0 50px}.transport{position:sticky;top:66px;z-index:15;display:grid;grid-template-columns:auto minmax(240px,1fr) minmax(190px,260px);gap:18px;align-items:center;padding:13px 16px;border:1px solid var(--line);border-radius:14px;background:rgba(20,22,26,.95);box-shadow:0 15px 40px rgba(0,0,0,.25)}.transport-buttons{display:flex;gap:8px}.timeline input,.master input{width:100%;accent-color:var(--accent)}.timeline>div{display:flex;justify-content:space-between;gap:12px;color:var(--muted);font-size:12px}.master{display:grid;grid-template-columns:auto 1fr 40px;gap:8px;align-items:center;color:var(--muted);font-size:12px}.tabs{display:flex;gap:8px;margin:18px 0}.tab.active{background:var(--text);color:var(--ink);font-weight:850}.tab-panel{display:none}.tab-panel.active{display:block}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:20px 0 12px}.section-heading h1{margin:0;font-size:clamp(2rem,4vw,4rem);line-height:.9;letter-spacing:-.06em;text-transform:uppercase}.eyebrow{margin:0 0 7px;color:var(--accent);font-size:11px;font-weight:900;letter-spacing:.15em;text-transform:uppercase}.heading-actions{display:flex;flex-wrap:wrap;gap:8px}.privacy-strip,.phone-tip{padding:10px 13px;border:1px solid rgba(201,255,74,.23);border-radius:10px;background:rgba(201,255,74,.055);color:var(--muted);font-size:12px}.mixer{display:grid;grid-template-columns:repeat(7,minmax(135px,1fr));gap:10px;margin:12px 0;overflow-x:auto;padding-bottom:4px}.channel{min-width:135px;padding:12px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}.channel.ai-channel{border-color:rgba(201,255,74,.55);background:linear-gradient(180deg,rgba(201,255,74,.08),var(--panel))}.channel-head{min-height:44px;display:flex;align-items:flex-start;justify-content:space-between;gap:6px}.channel-name{font-weight:900;text-transform:uppercase;letter-spacing:-.02em}.channel-file{display:block;height:34px;margin:5px 0 10px;color:var(--muted);font-size:11px;overflow:hidden}.load-label{display:block;padding:8px 6px;border:1px dashed var(--line);border-radius:8px;text-align:center;color:var(--muted);cursor:pointer}.load-label:hover{border-color:var(--accent);color:var(--text)}.load-label input{position:absolute;opacity:0;pointer-events:none}.fader-wrap{height:210px;display:grid;place-items:center;margin:11px 0}.channel-fader{width:180px;transform:rotate(-90deg);accent-color:var(--accent)}.level-output{display:block;text-align:center;color:var(--accent);font-size:12px;font-weight:800}.channel-buttons{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin:10px 0}.channel-buttons button{min-height:36px;padding:6px}.channel-buttons button.active{background:var(--accent);color:var(--ink);font-weight:900}.pan-label{display:block;color:var(--muted);font-size:11px}.pan-label input{width:100%;accent-color:var(--cyan)}.remove-guide{width:100%;min-height:34px;margin-top:8px;padding:5px;font-size:11px}.phone-tip{display:none}.lyric-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.card{padding:20px;border:1px solid var(--line);border-radius:16px;background:var(--panel)}.card h2{margin:0 0 7px;font-size:24px;letter-spacing:-.04em}.card p{color:var(--muted)}textarea,select,input[type=number]{width:100%;margin-top:6px;padding:11px;border:1px solid var(--line);border-radius:9px;background:#0d0f12;color:var(--text)}textarea{resize:vertical}.form-grid,.melody-controls{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:11px}label{color:var(--muted);font-size:12px;font-weight:750}.disclaimer{display:block;margin-top:10px;color:var(--muted)}.activity-note{margin-top:11px;padding:10px;border-radius:9px;background:rgba(102,217,184,.07);color:var(--muted);font-size:12px}.melody-card{grid-column:1/-1}.melody-controls{grid-template-columns:2fr 1fr 1fr}.guide-copy{margin-bottom:0}footer{padding:24px;text-align:center;border-top:1px solid var(--line);color:var(--muted);font-size:12px}
@media(max-width:900px){main{width:min(100% - 20px,1480px)}.transport{top:58px;grid-template-columns:auto 1fr}.master{grid-column:1/-1}.lyric-grid{grid-template-columns:1fr}.melody-card{grid-column:auto}.mixer{grid-template-columns:repeat(7,minmax(125px,1fr))}.section-heading{align-items:flex-start;flex-direction:column}.app-header{min-height:58px}.header-copy small{display:none}}
@media(max-width:560px){.app-header{gap:10px}.header-copy strong{font-size:12px}.transport{padding:10px;gap:10px;grid-template-columns:1fr}.transport-buttons{display:grid;grid-template-columns:1fr 1fr}.timeline{grid-row:1}.master{grid-column:auto}.tabs{position:sticky;top:58px;z-index:14;padding:7px 0;background:var(--bg)}.tab{flex:1}.section-heading h1{font-size:2.35rem}.heading-actions{display:grid;grid-template-columns:1fr 1fr;width:100%}.heading-actions button:last-child{grid-column:1/-1}.privacy-strip{line-height:1.35}.mixer{display:block;overflow:visible}.channel{min-width:0;margin-bottom:9px}.channel-head{min-height:0}.channel-file{height:auto;min-height:16px}.fader-wrap{height:auto;display:block;margin:10px 0}.channel-fader{width:100%;transform:none}.channel-controls{display:grid;grid-template-columns:1fr 1fr;gap:9px;align-items:center}.channel-buttons{margin:0}.phone-tip{display:block}.form-grid,.melody-controls{grid-template-columns:1fr}.card{padding:15px}footer{padding-bottom:max(24px,env(safe-area-inset-bottom))}}
.load-label{position:relative;overflow:hidden}.load-label input{left:0;bottom:0;width:1px;height:1px}