app/studio.css

/* Kiku Studio: an arrangement view in the spirit of a desktop DAW, on the app's own tokens. */
:root{--grid-bar:#ffffff17;--grid-beat:#ffffff09;--lane:#141414;--lcd:#0b0b0b;--lcd-ink:#ffb49b;--mute:#f2b33d;--solo:#3fbf8a;--rec:#e8476f}
:root[data-theme=light]{--grid-bar:#0000001c;--grid-beat:#0000000b;--lane:#f7f6f3;--lcd:#1d1c1a;--lcd-ink:#ffb49b}

.studio{height:100svh;display:grid;overflow:hidden;background:var(--paper);font-size:13px;
 grid-template-columns:196px minmax(0,1fr) 316px;grid-template-rows:50px 40px minmax(0,1fr) 232px;
 grid-template-areas:"bar bar bar" "tools tools tools" "browser arr ai" "mixer mixer ai"}
.studio.no-mixer{grid-template-rows:50px 40px minmax(0,1fr) 0}

/* ---------------------------------------------------------------- top bar */
.studio-bar{grid-area:bar;display:flex;align-items:center;gap:10px;padding:0 12px;background:var(--panel);border-bottom:1px solid var(--line)}
.studio-logo{display:flex;align-items:center;gap:7px;font-family:var(--display);font-size:17px;letter-spacing:.02em;margin-right:6px;color:var(--ink)}
.studio-logo span{color:var(--accent);margin-left:-3px}
.studio-logo svg{color:var(--muted)}
.transport{display:flex;gap:3px;padding:3px;background:var(--surface);border-radius:9px;border:1px solid var(--line)}
.transport button{width:34px;height:30px;display:grid;place-items:center;border-radius:6px;color:var(--ink)}
.transport button:hover{background:var(--panel)}
.transport button.on{color:var(--accent)}
.transport .play.on{background:var(--accent);color:#fff}
.transport .rec{color:var(--rec)}
.transport .rec.on{background:var(--rec);color:#fff;animation:rec-pulse 1.2s ease-in-out infinite}
@keyframes rec-pulse{50%{opacity:.6}}
.lcd{display:flex;flex-direction:column;justify-content:center;min-width:112px;height:38px;padding:0 12px;border-radius:7px;background:var(--lcd);color:var(--lcd-ink);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;line-height:1.15}
.lcd-time{font-size:17px;letter-spacing:.03em}
.lcd-bars{font-size:10px;opacity:.65}
.lcd.small{min-width:0;align-items:flex-start;font-size:13px}
.lcd-label{font-size:9px;opacity:.6;letter-spacing:.1em}
.bar-spacer{flex:1}
.studio-user{font-size:12px;color:var(--muted);max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.theme-toggle.inline-toggle{position:static;width:32px;height:32px}

/* ---------------------------------------------------------------- tools */
.studio-tools{grid-area:tools;display:flex;align-items:center;gap:8px;padding:0 10px;background:var(--panel);border-bottom:1px solid var(--line);min-width:0}
.tool-group{display:flex;align-items:center;gap:2px;padding-right:8px;border-right:1px solid var(--line)}
.tool-button{height:28px;min-width:28px;display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:0 7px;border-radius:6px;color:var(--muted);border:1px solid transparent;font-size:12px;cursor:pointer}
.tool-button:hover{color:var(--ink);background:var(--surface)}
.tool-button.on{color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent);border-color:color-mix(in srgb,var(--accent) 35%,transparent)}
.tool-button.wide{padding:0 14px;height:38px;border:1px solid var(--line);color:var(--ink);font-size:14px}
.snap{gap:6px;color:var(--muted)}
.snap select{background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:6px;height:26px;padding:0 6px;font-size:12px}
.tool-hint{margin-left:auto;font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}

/* ---------------------------------------------------------------- browser */
.browser{grid-area:browser;overflow:auto;background:var(--panel);border-right:1px solid var(--line);padding:4px 8px 16px}
.browser h2{font-family:var(--sans);font-weight:400;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:16px 8px 6px}
.browse-item{display:flex;align-items:center;gap:9px;width:100%;padding:7px 9px;border-radius:6px;font-size:13px;text-align:left;color:var(--ink)}
.browse-item svg{color:var(--muted);flex:none}
.browse-item:hover{background:var(--surface)}
.browse-item.chosen{background:color-mix(in srgb,var(--accent) 13%,transparent);color:var(--accent)}
.browse-item.chosen svg,.browse-item.recording svg{color:inherit}
.browse-item.recording{background:var(--rec);color:#fff}
.project-info label,.project-info p{display:flex;justify-content:space-between;align-items:center;font-size:12px;padding:4px 9px;margin:0;color:var(--muted)}
.project-info strong{color:var(--ink);font-weight:400}
.project-info input{width:74px;background:var(--surface);border:1px solid var(--line);border-radius:5px;color:var(--ink);padding:3px 6px;font-size:12px}
.project-info .chord-summary{display:block;color:var(--ink);font-family:ui-monospace,monospace;font-size:11px;line-height:1.5}

/* ---------------------------------------------------------------- arrangement */
.arrangement{grid-area:arr;overflow:auto;position:relative;background:var(--lane);overscroll-behavior:contain}
.arr-canvas{position:relative;min-height:100%}
.arr-top{position:sticky;top:0;z-index:6;display:flex;background:var(--panel);border-bottom:1px solid var(--line)}
.arr-corner{position:sticky;left:0;z-index:7;width:196px;flex:none;display:flex;align-items:flex-end;padding:0 10px 7px;background:var(--panel);border-right:1px solid var(--line);font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.ruler{position:relative;cursor:text;user-select:none;touch-action:none}
.ruler-bar{position:absolute;top:0;bottom:0;border-left:1px solid var(--line);padding:5px 5px;font-size:10px;color:var(--muted);font-family:ui-monospace,monospace;pointer-events:none}
.ruler-head{position:absolute;top:0;left:-6px;width:0;height:0;border:6px solid transparent;border-top:9px solid var(--accent);pointer-events:none}
.ruler-loop{position:absolute;bottom:0;height:5px;background:var(--accent);border-radius:2px;pointer-events:none}
.ruler-range{position:absolute;top:0;bottom:0;background:color-mix(in srgb,var(--accent) 20%,transparent);pointer-events:none}
.ruler-ghost{position:absolute;top:2px;height:6px;border-radius:3px;pointer-events:none;background:repeating-linear-gradient(-45deg,var(--accent) 0 4px,transparent 4px 8px);animation:ghost-slide 1s linear infinite;background-size:11px 11px}
@keyframes ghost-slide{to{background-position:11px 0}}
.chord-lane{position:relative;border-top:1px solid var(--line);font-family:ui-monospace,monospace;font-size:11px}
.chord-lane span{position:absolute;top:3px;padding:1px 6px;border-radius:4px;background:var(--surface);border-left:2px solid var(--accent);white-space:nowrap}
.arr-rows{display:flex}
.arr-headers{position:sticky;left:0;z-index:5;width:196px;flex:none;background:var(--panel);border-right:1px solid var(--line)}
.track-head{display:flex;align-items:stretch;border-bottom:1px solid var(--line);border-left:4px solid var(--clip)}
.track-number{width:24px;flex:none;display:grid;place-items:center;font-size:11px;color:var(--muted);cursor:pointer;font-family:ui-monospace,monospace}
.track-main{flex:1;min-width:0;display:flex;flex-direction:column;justify-content:center;gap:6px;padding:0 8px 0 2px}
.track-name{background:transparent;border:1px solid transparent;color:var(--ink);font-size:12.5px;padding:2px 5px;border-radius:4px;width:100%}
.track-name:hover{border-color:var(--line)}
.track-name:focus{background:var(--surface);outline:none;border-color:var(--accent)}
.track-buttons{display:flex;gap:4px;padding-left:4px}
.ms{width:22px;height:19px;display:grid;place-items:center;font-size:10px;font-weight:700;border-radius:4px;background:var(--surface);border:1px solid var(--line);color:var(--muted)}
.ms.on-mute{background:var(--mute);border-color:var(--mute);color:#1d1606}
.ms.on-solo{background:var(--solo);border-color:var(--solo);color:#0a1f16}
.ms.trash{margin-left:auto;border-color:transparent;background:transparent}
.ms.trash:hover{color:var(--rec)}
.arr-lanes{position:relative;flex:none;touch-action:none;user-select:none}
.arr-lanes.tool-range{cursor:text}
.lane{position:absolute;left:0;right:0;border-bottom:1px solid var(--line);pointer-events:none}
.clip{position:absolute;border-radius:5px;overflow:hidden;cursor:grab;background:var(--clip);box-shadow:inset 0 0 0 1px #0000002e;transition:filter .15s,opacity .15s}
.clip:active{cursor:grabbing}
.tool-range .clip{cursor:text}
.clip-head{height:16px;padding:1px 7px;font-size:11px;font-weight:600;color:#17110d;background:#0000001f;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;pointer-events:none}
.clip-wave{display:block;pointer-events:none}
.clip.chosen{box-shadow:0 0 0 2px var(--ink),inset 0 0 0 1px #0000002e;z-index:1}
.clip.muted{filter:grayscale(1);opacity:.35}
.clip-edge{position:absolute;top:0;bottom:0;left:0;width:7px;cursor:ew-resize;z-index:1}
.clip-edge.right{left:auto;right:0}
.clip-edge:hover{background:#ffffff40}
.range-box{position:absolute;z-index:2;pointer-events:none;background:color-mix(in srgb,var(--accent) 24%,transparent);box-shadow:inset 1px 0 var(--accent),inset -1px 0 var(--accent)}
.ghost{position:absolute;top:0;z-index:2;pointer-events:none;border-left:1px dashed var(--accent);border-right:1px dashed var(--accent);background:repeating-linear-gradient(-45deg,color-mix(in srgb,var(--accent) 12%,transparent) 0 10px,transparent 10px 20px)}
.ghost span{position:sticky;left:204px;display:inline-block;margin:6px;padding:3px 8px;border-radius:5px;background:var(--panel);color:var(--accent);font-size:11px;white-space:nowrap;max-width:calc(100% - 12px);overflow:hidden;text-overflow:ellipsis}
.playhead{position:absolute;top:0;left:-1px;width:2px;background:var(--accent);pointer-events:none;z-index:4;will-change:transform}
.arr-empty{position:absolute;left:0;top:0;height:100%;min-height:260px;display:grid;place-items:center;cursor:default}
.empty-state{max-width:470px;text-align:center;padding:24px}
.empty-state h2{font-size:30px;margin:0 0 12px}
.empty-state p{color:var(--muted);line-height:1.65;font-size:14px;margin:0 0 22px}
.empty-state>div{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.empty-state .run-button{flex:none;padding:0 18px}

/* ---------------------------------------------------------------- AI panel */
.ai-panel{grid-area:ai;display:flex;flex-direction:column;min-height:0;overflow:auto;background:var(--panel);border-left:1px solid var(--line)}
.panel-title{display:flex;align-items:center;gap:7px;padding:13px 14px;border-bottom:1px solid var(--line);font-size:13px;color:var(--accent)}
.panel-sub{margin-left:auto;font-size:11px;color:var(--muted);font-family:ui-monospace,monospace}
.ai-body{padding:14px;display:flex;flex-direction:column;gap:13px}
.ai-heading{display:flex;align-items:center;gap:8px;margin:0;font-size:18px}
.ai-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:3px;padding:3px;background:var(--surface);border-radius:9px}
.ai-tabs button{display:flex;flex-direction:column;align-items:center;gap:4px;padding:7px 2px;border-radius:6px;font-size:10.5px;color:var(--muted)}
.ai-tabs button:hover:not(:disabled){color:var(--ink)}
.ai-tabs button.chosen{background:var(--panel);color:var(--accent);box-shadow:0 1px 3px #0003}
.ai-blurb{margin:0;font-size:12.5px;line-height:1.6;color:var(--muted)}
.ai-panel .field{display:flex;flex-direction:column;gap:6px;font-size:12px;margin:0}
.ai-panel .field>span{display:flex;justify-content:space-between;color:var(--muted)}
.ai-panel .field em{font-style:normal;color:var(--ink)}
.ai-panel input:not([type]),.ai-panel input[type=text],.ai-panel select,.ai-panel textarea{width:100%;background:var(--surface);border:1px solid var(--line);border-radius:7px;padding:8px 10px;color:var(--ink);font-size:13px}
.ai-panel textarea{resize:vertical;line-height:1.5;margin-top:7px;font-family:inherit}
.ai-panel input[type=range]{accent-color:var(--accent);width:100%}
.ai-panel .check{display:flex;gap:8px;align-items:flex-start;font-size:12px;line-height:1.45;color:var(--ink)}
.ai-more summary{font-size:12px;color:var(--muted);cursor:pointer}
.ai-where{margin:0;padding:2px 0 2px 10px;border-left:2px solid var(--accent);font-size:11.5px;line-height:1.55;color:var(--muted)}
.ai-error{margin:0;display:flex;gap:8px;justify-content:space-between;align-items:flex-start;padding:9px 11px;border-radius:8px;font-size:12px;line-height:1.5;background:color-mix(in srgb,var(--rec) 12%,var(--panel));border:1px solid color-mix(in srgb,var(--rec) 40%,transparent)}
.ai-actions{display:flex;gap:8px}
.ai-actions .tool-button{height:40px;width:40px;border-color:var(--line)}
.run-button{flex:1;height:40px;display:flex;align-items:center;justify-content:center;gap:8px;border-radius:9px;background:var(--accent);color:#fff;font-size:14px;box-shadow:inset 0 1px 2px #ffffff40}
.run-button:hover{background:#ed491d}
.ai-note{margin:-4px 0 0;text-align:center;font-size:11px;color:var(--muted)}
.job-list{margin-top:auto;padding:10px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:6px}
.job{display:grid;grid-template-columns:16px minmax(0,1fr) 22px;gap:9px;align-items:center;padding:9px 10px;border-radius:8px;background:var(--surface)}
.job .spinner{width:14px;height:14px}
.job strong{display:block;font-size:12px;font-weight:600}
.job span{display:block;font-size:11px;line-height:1.45;color:var(--muted);overflow-wrap:anywhere}
.job.failed{border:1px solid color-mix(in srgb,var(--rec) 45%,transparent);color:var(--rec)}
.job button{color:var(--muted);display:grid;place-items:center;height:22px;border-radius:5px}
.job button:hover{color:var(--ink);background:var(--panel)}

/* ---------------------------------------------------------------- mixer */
.mixer{grid-area:mixer;display:flex;gap:5px;padding:8px;overflow-x:auto;background:var(--panel);border-top:1px solid var(--line)}
.mixer-empty{align-self:center;margin:0 16px;color:var(--muted);font-size:12px}
.strip{flex:none;width:72px;display:flex;flex-direction:column;align-items:center;gap:5px;padding:6px 4px 7px;border-radius:7px;background:var(--surface);border-top:3px solid var(--clip)}
.strip-master{width:80px;background:color-mix(in srgb,var(--accent) 8%,var(--surface))}
.strip-number{font-size:10px;color:var(--muted);font-family:ui-monospace,monospace}
.strip-pan{height:16px;display:flex;align-items:center}
.strip-pan input{width:58px;accent-color:var(--clip)}
.strip-body{display:flex;gap:7px;height:104px}
.strip-meter{position:relative;width:6px;border-radius:3px;overflow:hidden;background:#00000055}
.strip-meter i{position:absolute;inset:0;transform:scaleY(0);transform-origin:bottom;background:linear-gradient(to top,#3fbf8a 0 62%,#f2b33d 62% 84%,#e8476f 84%)}
.fader{writing-mode:vertical-lr;direction:rtl;width:22px;height:104px;margin:0;accent-color:var(--clip)}
.strip-db{font-size:10px;color:var(--muted);font-family:ui-monospace,monospace}
.strip-buttons{display:flex;gap:3px}
.strip-name{max-width:64px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:10.5px}

/* ---------------------------------------------------------------- notices */
.studio-notice{position:fixed;left:50%;bottom:22px;transform:translateX(-50%);z-index:20;margin:0;display:flex;gap:12px;align-items:center;padding:10px 16px;border-radius:9px;background:var(--ink);color:var(--paper);font-size:13px;box-shadow:0 8px 24px #0005;max-width:calc(100vw - 32px)}
.studio-notice button{color:var(--accent);font-weight:600}

/* ---------------------------------------------------------------- narrow screens */
@media (max-width:900px){
 .studio{height:auto;min-height:100svh;overflow:visible;grid-template-columns:minmax(0,1fr);
  grid-template-rows:auto auto 56svh auto auto auto;grid-template-areas:"bar" "tools" "arr" "ai" "browser" "mixer"}
 .studio.no-mixer{grid-template-rows:auto auto 56svh auto auto}
 .studio-bar{flex-wrap:wrap;padding:8px 12px}
 .studio-user,.tool-hint,.lcd.small{display:none}
 .studio-tools{overflow-x:auto}
 .ai-panel,.browser{border:0;border-top:1px solid var(--line)}
 .mixer{min-height:200px}
}
@media (prefers-reduced-motion:reduce){.transport .rec.on,.ruler-ghost{animation:none}}

/* Model choice in the AI panel */
.model-pick{display:flex;flex-direction:column;gap:7px}
.model-pick>div{display:grid;grid-template-columns:repeat(3,1fr);gap:3px;padding:3px;background:var(--surface);border-radius:9px}
.model-pick button{padding:7px 4px;border-radius:6px;font-size:11.5px;color:var(--muted);white-space:nowrap}
.model-pick button:hover:not(:disabled){color:var(--ink)}
.model-pick button.chosen{background:var(--panel);color:var(--accent);box-shadow:0 1px 3px #0003}
.model-pick button:disabled{opacity:.35}
.model-pick p,.model-pick-note{margin:0;font-size:11.5px;line-height:1.5;color:var(--muted)}

/* Cover and score editing */
.segmented{display:grid;grid-template-columns:1fr 1fr;gap:3px;padding:3px;background:var(--surface);border-radius:9px}
.segmented button{padding:7px 4px;border-radius:6px;font-size:12px;color:var(--muted)}
.segmented button:hover{color:var(--ink)}
.segmented button.chosen{background:var(--panel);color:var(--accent);box-shadow:0 1px 3px #0003}
.text-button{display:inline-flex;align-items:center;gap:6px;margin-top:7px;padding:0;font-size:12px;color:var(--accent);background:none;border:0;cursor:pointer}
.text-button:hover{text-decoration:underline}
.ghost-button{flex:1;height:34px;border-radius:8px;border:1px solid var(--line);color:var(--ink);font-size:12.5px;background:var(--surface);cursor:pointer}
.ghost-button:hover{border-color:var(--accent);color:var(--accent)}
.score-next{display:flex;gap:8px}
.score-sheet{display:flex;flex-direction:column;gap:11px}
.score-meta{display:grid;grid-template-columns:1fr 92px;gap:10px;align-items:end}
.score-meta input[type=number]{width:100%;background:var(--surface);border:1px solid var(--line);border-radius:7px;padding:7px 8px;color:var(--ink);font-size:13px}
.stepper{display:flex;align-items:center;gap:4px;background:var(--surface);border:1px solid var(--line);border-radius:7px;padding:3px}
.stepper button{width:26px;height:26px;display:grid;place-items:center;border-radius:5px;color:var(--muted)}
.stepper button:hover{color:var(--ink);background:var(--panel)}
.stepper strong{flex:1;text-align:center;font-size:12.5px;font-weight:600;white-space:nowrap}
.stepper strong em{font-style:normal;color:var(--accent);font-weight:500}
.score-bars{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px;max-height:300px;overflow:auto;padding-right:2px}
.score-bar{position:relative;display:flex;flex-direction:column;gap:3px;padding:6px 7px 7px;border-radius:7px;background:var(--surface);border:1px solid var(--line)}
.score-bar.opens{border-left:3px solid var(--accent)}
.score-bar .bar-no{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);font-family:ui-monospace,monospace}
.score-bar .bar-no small{font-size:10px}
.score-bar em{font-style:normal;font-size:10px;letter-spacing:.06em;text-transform:uppercase;color:var(--accent)}
.ai-panel .score-bar input{padding:4px 6px;font-size:12.5px;font-family:ui-monospace,monospace;background:var(--panel)}
.score-hint{margin:0;font-size:11px;line-height:1.5;color:var(--muted)}