/* Shared Signal design. Appearance changes UI only, never exported video pixels. */
:root {
  --font: "Pretendard Variable", "Malgun Gothic", system-ui, sans-serif;
  --page:#fcfcfc; --band:#eaf0f3; --surface:#fff; --soft:#f2f5f7;
  --ink:#051a24; --navy:#051a24; --ink-2:#1d313b; --slate:#4b5d68; --muted:#566773;
  --line:#dbe3e8; --line-strong:#a8b9c4; --teal:#00797d; --teal-dark:#00666a;
  --teal-soft:#e6f6f4; --chip:#eff3f5; --chip-hover:#e1ecee;
  --signal:#008b8e; --signal-grad:linear-gradient(135deg,#3fe0c5,#14c8b6 45%,#00a3a3);
  --action-ink:#051a24; --selected:#051a24; --selected-ink:#fff;
  --danger:#9e3025; --danger-bg:#fff0ed; --shadow:0 4px 16px #051a2410;
  color-scheme:light; font-family:var(--font); background:var(--page); color:var(--ink);
}
:root[data-theme="night"] {
  --page:#101a20; --band:#192a33; --surface:#1a2932; --soft:#20353f;
  --ink:#eff6f8; --navy:#eff6f8; --ink-2:#e0eef2; --slate:#c5d6de; --muted:#aabfc9;
  --line:#3e5663; --line-strong:#6e8998; --teal:#77e4d8; --teal-dark:#9aeee3;
  --teal-soft:#203f43; --chip:#263c46; --chip-hover:#324e59;
  --signal:#77e4d8; --selected:#b5f4eb; --selected-ink:#082027;
  --danger:#ffc5bc; --danger-bg:#492c2c; --shadow:0 4px 18px #0003;
  color-scheme:dark;
}
:root[data-contrast="true"], :root[data-contrast="true"] body.high-contrast {
  --page:#fff; --band:#fff; --surface:#fff; --soft:#fff; --ink:#000; --navy:#000;
  --ink-2:#000; --slate:#17252d; --muted:#26353f; --line:#344954; --line-strong:#17252d;
  --teal:#00555b; --teal-dark:#00464d; --teal-soft:#fff; --chip:#fff; --chip-hover:#e5eff1;
  --signal:#00555b; --signal-grad:#000; --action-ink:#fff; --selected:#000; --selected-ink:#fff;
  --shadow:none; color-scheme:light;
}
html body, html body.subsite { background:linear-gradient(180deg,var(--band),var(--page) 760px) no-repeat,var(--page); color:var(--ink); font-family:var(--font); }
[hidden] { display:none!important; }
body :focus-visible { outline:3px solid var(--signal)!important; outline-offset:3px; }
body :is(input,textarea,select) { accent-color:var(--teal); }
body input::file-selector-button { font:inherit; background:var(--chip); color:var(--ink); border:1px solid var(--line-strong); border-radius:8px; padding:8px 10px; margin-right:10px; cursor:pointer; }
body input[type="file"] { max-width:100%; min-width:0; color:var(--slate); }
body :is(button,input,select,textarea):disabled { opacity:.65; }
body :is(input,textarea)::placeholder { color:var(--muted); opacity:1; }
body select option { color:var(--ink); background:var(--surface); }

/* One header and the same three persistent appearance controls on subpages. */
.subsite { margin:0; min-width:0; line-height:1.65; word-break:keep-all; overflow-wrap:anywhere; }
.subsite > header { width:min(1240px,calc(100% - 40px)); max-width:1240px; min-height:68px; margin:16px auto 0; padding:12px 20px; display:flex; flex-wrap:wrap; align-items:center; gap:12px 24px; border:1px solid var(--line); border-radius:36px; background:var(--surface); box-shadow:var(--shadow); }
.subsite > header .brand { color:var(--ink); font:850 20px/1.4 var(--font); letter-spacing:-.035em; text-decoration:none; display:flex; align-items:center; gap:10px; white-space:nowrap; }
.subsite > header .brand span { color:var(--teal-dark); }
.subsite > header > a:not(.brand) { color:var(--slate); margin-left:auto; font:650 13px/1.5 var(--font); text-decoration:none; min-height:40px; display:flex; align-items:center; }
.appearance-controls { display:flex; gap:6px; flex-wrap:wrap; margin:0 0 0 auto; padding:0; }
.appearance-controls button { font:650 13px/1.4 var(--font); color:var(--ink); background:var(--chip); border:1px solid var(--line); border-radius:999px; min-height:40px; padding:8px 13px; white-space:nowrap; cursor:pointer; }
.appearance-controls button:hover { background:var(--chip-hover); }
.appearance-controls button[aria-pressed="true"] { background:var(--selected); color:var(--selected-ink); border-color:var(--selected); }
.appearance-controls button:disabled { cursor:not-allowed; }
.subsite > main { max-width:1240px; margin:0 auto; padding:44px 28px 56px; }
.subsite :is(.intro,.board-intro) { padding:10px 0 32px; }
.subsite h1 { font:800 clamp(30px,4vw,48px)/1.16 var(--font); letter-spacing:-.045em; color:var(--ink); margin:0 0 18px; }
.subsite :is(h2,h3) { color:var(--ink); letter-spacing:-.025em; }
.subsite :is(.eyebrow,.page-heading .eyebrow) { color:var(--teal-dark); font:750 12px/1.7 var(--font); letter-spacing:.12em; margin:0 0 12px; }
.subsite :is(.intro-copy,.intro>p:last-child,.muted,.lede) { color:var(--slate); }
.subsite a { color:var(--teal-dark); }
.subsite :is(.panel,.card,.preview-panel,.post-card,.composer,dialog,.surface-card,.stage-panel) { background:var(--surface); color:var(--ink); border-color:var(--line); border-radius:24px; box-shadow:var(--shadow); }
.subsite :is(.primary,.button-primary,.primary-button) { background:var(--signal-grad); color:var(--action-ink); border:1px solid transparent; border-radius:999px; min-height:48px; font-weight:750; box-shadow:0 4px 12px #00a3a322; }
.subsite :is(.primary,.button-primary,.primary-button):hover { background:var(--signal-grad); filter:brightness(1.04); }
.subsite :is(.secondary,.button-secondary,.secondary-button,.outline-button,.button-quiet,.quiet-button) { background:var(--soft); border:1px solid var(--line); color:var(--ink); border-radius:999px; }
.subsite :is(.text-button,.back-link,summary) { color:var(--teal-dark); }
.subsite :is(input[type="text"],input[type="search"],input[type="number"],textarea,select) { color:var(--ink); background:var(--surface); border:1px solid var(--line-strong); border-radius:12px; font-family:var(--font); }
.subsite input:not([type]), .subsite input[type="email"] { color:var(--ink); background:var(--surface); border-color:var(--line-strong); border-radius:12px; }
.subsite .skip-link { color:var(--ink); background:var(--surface); }
.subsite :is(.card label,.field,.field label,.file-choice strong,.song-title,.selected-track-name) { color:var(--ink); }
.subsite :is(.hint,.privacy,.current-lyric,.file-choice small,.preview-heading span,.template-heading p:not(.eyebrow),.export-panel>p,.post-body,.date,.list-status,.field-hint,.form-footnote,.char-count,.post-meta,.post-state,.song-date,.song-duration,.privacy-note,.storage-note,.section-heading p,.composer-heading p,.required,.selection-hint,.stage-caption,.footer-note,.small,.local-badge) { color:var(--muted); }
.subsite :is(.hint,.file-choice small,.template-card span,.field-hint,.form-footnote,.char-count,.required,.post-meta,.post-category,.post-state,.song-date) { font-size:12px; }
.subsite :is(.notice,.public-notice,.badge,.empty-state,.list-message,.confirmation-facts,.file-choice,.local-fallback,.post-category,.composer-icon,.stage-field,.raw-preview,.selected-preview,.live-preview,.target-group) { background:var(--soft); color:var(--slate); border-color:var(--line); }
.subsite :is(.notice.error,.notice-error,.form-status[data-tone="error"],.danger-button) { color:var(--danger); background:var(--danger-bg); border-color:var(--danger); }
.subsite :is(.badge.connected,.steps span,.card h2 span,.player button,.message-mark) { background:var(--teal-soft); color:var(--teal-dark); border-color:var(--line); }
.subsite :is(.filter-list button,.song-row,.target-option,.stage-track) { color:var(--slate); background:var(--surface); border-color:var(--line); }
.subsite :is(.filter-list button[aria-pressed="true"],.song-row:has(input:checked),.stage-track.is-selected) { background:var(--selected); color:var(--selected-ink); border-color:var(--selected); }
.subsite .song-row:has(input:checked) :is(.song-title,.song-date,.song-duration) { color:inherit; }
.subsite .song-row:hover { background:var(--soft); }
.subsite .song-row:has(input:checked):hover { background:var(--selected); }
.subsite :is(details,.export-panel,.template-section,.filter-list,.post-meta,.policy-description,.local-fallback,.stage-lane,.stage-selection) { border-color:var(--line); }
.subsite > footer { max-width:1184px; margin:0 auto; padding:24px 20px 36px; color:var(--muted); border-top:1px solid var(--line); font:13px/1.8 var(--font); }
.subsite dialog::backdrop { background:#06131cb3; }
.subsite.large-text > main { zoom:1.12; max-width:calc(1240px / 1.12); }
.subsite.large-text > header { font-size:17px; }
.subsite.large-text .appearance-controls button { font-size:15px; }

/* Lyrics: a real editing workspace, with video output independent of site theme. */
.lyrics-page .intro { max-width:900px; padding-bottom:34px; }
.lyrics-page .studio { grid-template-columns:minmax(0,1.65fr) minmax(310px,1fr); gap:24px; }
.lyrics-page .preview-panel { padding:24px; top:20px; }
.lyrics-page .preview-heading { font-size:14px; align-items:center; }
.lyrics-page .preview-heading strong { font-size:17px; }
.lyrics-page .preview-heading span { border:1px solid var(--line); border-radius:999px; padding:5px 12px; }
.lyrics-page .screen { background:#07131b; border:1px solid var(--line); border-radius:16px; }
.lyrics-page .player { padding-block:18px; }
.lyrics-page .player button { width:46px; height:46px; border:1px solid var(--line); }
.lyrics-page .card { padding:26px; }
.lyrics-page .card label { font-size:14px; gap:8px; }
.lyrics-page .file-choice { padding:16px; border-radius:16px; }
.lyrics-page .file-choice strong { font-size:15px; }
.lyrics-page .two-fields { grid-template-columns:minmax(0,1fr); }
.lyrics-page .template-section { margin-top:48px; padding-top:36px; }
.lyrics-page .template-heading h2 { font-size:28px; }
.lyrics-page .template-card { background:var(--surface); color:var(--ink); border-radius:18px; box-shadow:0 0 0 1px var(--line); }
.lyrics-page .template-card[aria-pressed="true"] { border-color:var(--teal); box-shadow:0 0 0 2px var(--teal); }
.lyrics-page .template-card span { color:var(--muted); }
.lyrics-page .template-card strong { padding-top:4px; font-size:15px; }
.lyrics-page .template-card canvas { border-bottom:1px solid var(--line); }
.lyrics-page .template-heading .secondary { width:auto; }
.legal-page > main { width:min(900px,calc(100% - 32px)); max-width:900px; margin:40px auto; padding:clamp(22px,5vw,52px); background:var(--surface); border:1px solid var(--line); border-radius:24px; box-shadow:var(--shadow); }
.legal-page h1 { margin-top:24px; }
.legal-page .intro { padding:0; font-size:18px; }
.legal-page .notice { border-radius:14px; }
.lab-page :is(.header-title,.experiment-badge,.engine-status,.file-picker>span,.section-heading p,.master-before .small) { color:var(--muted); }
.lab-page :is(.file-picker,.master-before,.master-result-panel,.stage-selection,.track-row,.advanced-targets,.search-label,.selected-preview,.raw-preview,.track-actions button,.stage-order-controls button) { background:var(--soft); color:var(--ink); border-color:var(--line); }
.lab-page .file-picker strong { color:var(--ink); }
.lab-page .app-header { height:auto; }
.lab-page .header-title { white-space:nowrap; }

/* Mastering: all cards, expanded tools and dialogs use the same palette. */
html body[data-screen] .app-header { background:var(--surface); border-color:var(--line); }
body[data-screen] :is(.surface-card,.uploaded-strip,.result-master-settings,.export-panel,.ab-player,.workflow-steps,.settings-dialog,.library-entry,.library-handoff,.optional-tools,.studio-box,.auto-master-section,.analysis-setup,.analysis-panel,.analysis-fallback,.safe-result-card,.quality-gates,.candidate-ladder,.compare-section,.trim-section,.advanced-section,.master-mode-picker,.spatial-card,.support-panel) { background:var(--surface); border-color:var(--line); color:var(--ink); }
body[data-screen] :is(.drop-zone,.genre-required-choice,.fade-settings,.intro-fade-option,.privacy-row,.secure-note,.file-icon,.waveform-overview,.trim-time-readouts>div,.trim-action-group,.trim-utility-button,.trim-timeline,.compact-band,.advanced-module,.drum-file-label,.ambience-file-label,.batch-drop,.batch-list li,.format-option>span,.listen-choice,.family-footer a) { background:var(--soft); border-color:var(--line); color:var(--ink); }
body[data-screen] :is(.primary-button,.listen-choice[aria-pressed="true"]) { color:var(--action-ink); background:var(--signal-grad); }
body[data-screen] :is(.outline-button,.icon-button,.reset-button,.access-button,.trim-action-group button,.batch-compare-button) { color:var(--ink); background:var(--chip); border-color:var(--line); }
body[data-screen] :is(input[type="number"],input[type="text"],select) { background-color:var(--surface); color:var(--ink); border-color:var(--line-strong); }
body[data-screen] :is(.format-option input:checked+span,.access-button[aria-pressed="true"],.support-link,.wave-source-label.active) { color:var(--selected-ink); background:var(--selected); }
body[data-screen] :is(.upload-heading p,.library-entry small,.drop-zone p,.drop-zone small,.privacy-row,.fade-settings p,.session-note,.beginner-result p,.result-master-settings p,.uploaded-strip small,.wave-source-label,.export-cta>span,.optional-tools summary small,.studio-box p,.analysis-copy p,.analysis-tasks,.form-hint) { color:var(--slate); }
body[data-screen] .toast { color:var(--selected-ink); background:var(--selected); }
body[data-screen] .settings-dialog::backdrop { background:#06131cb3; }
body[data-screen] .transport .transport-play { color:var(--selected-ink); background:var(--selected); }
body[data-screen] :is(.wave-row.original,.quick-grid>article,.preview-toggle,.choice-row button,.trim-summary) { color:var(--ink); background:var(--soft); border-color:var(--line); }
body[data-screen] .wave-source-label { color:var(--ink); background:var(--surface); }
body[data-screen] .format-option input:checked+span :is(b,small) { color:var(--selected-ink); }
body[data-screen] .format-option input:checked+span::after { background:var(--selected-ink); color:var(--selected); }
body[data-screen] .choice-row button.active { color:var(--selected-ink); background:var(--selected); }
body[data-screen] .choice-row button.active span { color:inherit; }
body[data-screen] .optional-tools[open] > summary .disclosure-mark { color:var(--selected-ink); background:var(--selected); }
body[data-screen] :is(.trim-summary b,.trim-summary strong,.quick-copy strong) { color:var(--ink); }
body[data-screen] .family-footer a { color:var(--ink); }
body[data-screen] .brand-mark { color:var(--selected-ink); background:var(--selected); }
body.large-text[data-screen] .app-header { display:flex; flex-wrap:wrap; height:auto; min-height:64px; padding:14px; border-radius:24px; }
body.large-text[data-screen] .app-header .access-actions { flex-basis:100%; min-width:0; flex-wrap:wrap; justify-content:flex-start; margin:0; padding:0; overflow:visible; }
body[data-screen] :is(.round-feature,.workflow-steps [aria-current="step"]) { color:var(--action-ink); background:var(--signal-grad); }
body[data-screen] .workflow-steps li > span { color:var(--ink); background:var(--surface); border-color:var(--line-strong); }
body[data-screen] .workflow-steps [aria-current="step"] > span { color:var(--selected-ink); background:var(--selected); border-color:var(--selected); }
body[data-screen] :is(.upload-screen .wide-shell,.process-screen .process-shell)::before { background-image:linear-gradient(color-mix(in srgb,var(--muted) 15%,transparent),transparent); }
:root[data-contrast="true"] body :is(.card,.panel,.post-card,.composer,.preview-panel,.surface-card,.library-entry,.library-handoff,.optional-tools,.drop-zone,.genre-required-choice,.settings-dialog,.stage-field,.template-card) { border:2px solid var(--line-strong); box-shadow:none; }
:root[data-contrast="true"] body .screen { border:2px solid #000; }
:root[data-contrast="true"] body :is(.primary,.primary-button,.button-primary,.listen-choice[aria-pressed="true"]) { background:#000; color:#fff; box-shadow:none; }
:root[data-contrast="true"] body :is(.wave-row.selected,.library-entry) { background:#fff; color:#000; }
@media (max-width:900px) {
  .lyrics-page .studio { grid-template-columns:minmax(0,1fr); }
  .lyrics-page .preview-panel { position:static; }
  .lyrics-page .settings { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .subsite > header { border-radius:24px; }
}
@media (max-width:650px) {
  .subsite > header { width:calc(100% - 20px); margin-top:10px; padding:14px; gap:8px 14px; }
  .subsite > header .brand { font-size:17px; }
  .subsite > header > a:not(.brand) { font-size:12px; }
  .appearance-controls { flex-basis:100%; margin:0; gap:6px; }
  .appearance-controls button { flex:1; min-height:42px; padding-inline:8px; }
  .subsite > main { padding:30px 16px 36px; }
  .subsite h1 { font-size:32px; }
  .subsite .board-layout { grid-template-columns:minmax(0,1fr); }
  .lyrics-page .settings { grid-template-columns:minmax(0,1fr); }
  .lyrics-page :is(.preview-panel,.card) { padding:18px; border-radius:20px; }
  .lyrics-page .template-heading h2 { font-size:24px; }
  .lyrics-page .template-card strong { font-size:13px; }
  .lyrics-page .template-gallery { gap:14px; }
  .legal-page > main { padding:24px 20px; margin-top:24px; }
  .subsite.large-text > main { width:calc(100% / 1.12); padding-inline:14px; }
  body[data-screen].large-text .fade-setting-row { flex-wrap:wrap; }
  body.large-text[data-screen] .workflow-steps { gap:2px; padding:3px; font-size:11px; }
  body.large-text[data-screen] .workflow-steps li { white-space:nowrap; gap:4px; padding:4px 6px 4px 3px; }
}
/* Keep the accessible fieldset heading inside its card, not across the border. */
body[data-screen] .fade-settings { padding:22px 24px; }
body[data-screen] .fade-settings legend { float:left; width:100%; box-sizing:border-box; padding:0; margin:0 0 16px; line-height:1.5; }
body[data-screen] .fade-settings legend small { display:inline-block; margin-left:8px; font-size:13px; font-weight:400; }
body[data-screen] .fade-setting-row { clear:both; display:grid; grid-template-columns:minmax(160px,260px) max-content; justify-content:start; align-items:center; gap:12px 24px; padding:8px 0; }
body[data-screen] .fade-enable { min-height:44px; margin:0; gap:12px; }
body[data-screen] .fade-enable input { flex:none; width:20px; height:20px; margin:0; }
body[data-screen] .fade-duration { display:grid; grid-template-columns:110px 76px; align-items:center; gap:12px; margin:0; }
body[data-screen] .fade-duration input { width:76px; min-height:44px; }
body[data-screen] .fade-settings p { clear:both; margin:16px 0 0; padding-top:14px; border-top:1px solid var(--line); }
@media (max-width:650px) {
  body[data-screen] .fade-settings { padding:20px 16px; }
  body[data-screen] .fade-setting-row { grid-template-columns:minmax(0,1fr); gap:2px; padding:8px 0; }
  body[data-screen] .fade-duration { display:flex; padding-left:16px; gap:8px; justify-content:space-between; }
  body[data-screen] .fade-duration input { flex:none; width:64px; }
}
@media (prefers-reduced-motion:reduce) { .subsite *, .subsite *::before, .subsite *::after { animation:none!important; transition:none!important; scroll-behavior:auto!important; } }