/* File: web/assets/theme.css
 * Purpose: Singing Bridge — canonical design system.
 *          Tokens + component classes shared by every page: auth, library,
 *          teacher landing, student join, in-session.
 * Role: Import AFTER styles.css on every page. New pages MUST use these
 *       tokens and components rather than inventing new ones. See
 *       docs/STYLE_GUIDE.md before adding anything here.
 * Exports: CSS custom properties on :root, component classes prefixed .sb-.
 * Invariants: no colour, font, radius, or shadow literal in other CSS files —
 *             always a var(--sb-...). Dark surfaces (session UI) use the
 *             same tokens with a `.sb-theme-dark` scope flip.
 * Last updated: Sprint 37 (2026-05-23) -- omr-status-slot--failed: tappable with underline; mobile flex-wrap for asset-header.
 */

/* ============================================================
   1. Fonts
   ============================================================ */

@font-face {
  font-family: 'Fraunces';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('/assets/fonts/fraunces-latin-400-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Fraunces';
  font-weight: 400;
  font-style: italic;
  font-display: swap;
  src: url('/assets/fonts/fraunces-latin-400-italic.woff2') format('woff2');
}
@font-face {
  font-family: 'Fraunces';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('/assets/fonts/fraunces-latin-500-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Fraunces';
  font-weight: 500;
  font-style: italic;
  font-display: swap;
  src: url('/assets/fonts/fraunces-latin-500-italic.woff2') format('woff2');
}
@font-face {
  font-family: 'Poppins';
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  src: url('/assets/fonts/poppins-latin-400-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Poppins';
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  src: url('/assets/fonts/poppins-latin-500-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Poppins';
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url('/assets/fonts/poppins-latin-600-normal.woff2') format('woff2');
}

/* ============================================================
   2. Tokens
   ============================================================ */

:root {
  /* Colour — ink / paper (primary warm room palette) */
  --sb-ink:         #0F1720;
  --sb-ink-2:       #3F4651;
  --sb-ink-3:       #6E7684;
  --sb-paper:       #FBF6EF;
  --sb-paper-2:     #F3ECE0;
  --sb-paper-3:     #E9DFD0;

  --sb-line:        rgba(15,23,32,0.10);
  --sb-line-soft:   rgba(15,23,32,0.06);
  --sb-line-strong: rgba(15,23,32,0.22);

  /* Colour — brand (Rich Connexions inherited, used very sparingly) */
  --sb-navy:        #1A60AE;
  --sb-navy-deep:   #0D3563;
  --sb-cyan:        #00AEEF;

  /* Colour — accents (warm, musical) */
  --sb-rose:        #E17F8B;
  --sb-amber:       #E3A950;
  --sb-moss:        #6F9A7A;
  --sb-clay:        #C8684F;

  /* Semantic aliases — ALWAYS use these in components */
  --sb-fg:              var(--sb-ink);
  --sb-fg-muted:        var(--sb-ink-2);
  --sb-fg-subtle:       var(--sb-ink-3);
  --sb-bg:              var(--sb-paper);
  --sb-bg-raised:       #FFFFFF;
  --sb-bg-sunken:       var(--sb-paper-2);
  --sb-border:          var(--sb-line);
  --sb-border-strong:   var(--sb-line-strong);

  --sb-accent:          var(--sb-navy);
  --sb-accent-on:       #FFFFFF;
  --sb-success:         var(--sb-moss);
  --sb-warning:         var(--sb-amber);
  --sb-danger:          var(--sb-clay);
  --sb-live:            var(--sb-rose);

  /* Type */
  --sb-font-display:    'Fraunces', Georgia, serif;
  --sb-font-ui:         'Poppins', system-ui, -apple-system, sans-serif;

  /* Type scale */
  --sb-text-xs:   11px;
  --sb-text-sm:   13px;
  --sb-text-md:   15px;
  --sb-text-lg:   17px;
  --sb-text-xl:   22px;
  --sb-text-2xl:  28px;
  --sb-text-3xl:  36px;

  --sb-leading-tight:   1.2;
  --sb-leading-body:    1.5;

  /* Spacing — 8px base */
  --sb-space-1:  4px;
  --sb-space-2:  8px;
  --sb-space-3:  12px;
  --sb-space-4:  16px;
  --sb-space-5:  20px;
  --sb-space-6:  24px;
  --sb-space-8:  32px;
  --sb-space-10: 40px;
  --sb-space-12: 48px;
  --sb-space-16: 64px;

  /* Radii */
  --sb-r-xs: 6px;
  --sb-r-sm: 10px;
  --sb-r-md: 14px;
  --sb-r-lg: 20px;
  --sb-r-xl: 28px;
  --sb-r-pill: 999px;

  /* Shadows */
  --sb-shadow-1: 0 1px 2px rgba(15,23,32,0.04), 0 2px 6px rgba(15,23,32,0.04);
  --sb-shadow-2: 0 1px 2px rgba(15,23,32,0.04), 0 12px 30px rgba(15,23,32,0.06);
  --sb-shadow-3: 0 2px 6px rgba(15,23,32,0.08), 0 30px 60px rgba(15,23,32,0.14);

  /* Motion */
  --sb-dur-fast:  120ms;
  --sb-dur-med:   220ms;
  --sb-dur-slow:  420ms;
  --sb-ease:      cubic-bezier(.2,.7,.2,1);
}

/* Dark-theme scope — apply to any ancestor to flip ink/paper (used by session UI). */
.sb-theme-dark {
  --sb-fg:            var(--sb-paper);
  --sb-fg-muted:      rgba(251,246,239,0.72);
  --sb-fg-subtle:     rgba(251,246,239,0.45);
  --sb-bg:            var(--sb-ink);
  --sb-bg-raised:     #1A232E;
  --sb-bg-sunken:     #0A1018;
  --sb-border:        rgba(251,246,239,0.12);
  --sb-border-strong: rgba(251,246,239,0.28);
  --sb-accent:        var(--sb-paper);
  --sb-accent-on:     var(--sb-ink);
}

/* ============================================================
   3. Base resets + defaults (opt-in via .sb-page on <body>)
   ============================================================ */

.sb-page {
  margin: 0;
  font-family: var(--sb-font-ui);
  font-size: var(--sb-text-md);
  line-height: var(--sb-leading-body);
  color: var(--sb-fg);
  background: var(--sb-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.sb-page *,
.sb-page *::before,
.sb-page *::after { box-sizing: border-box; }

/* Restore hidden attribute semantics overridden by display:flex/grid on components. */
[hidden] { display: none !important; }

.sb-h1, .sb-page h1 {
  font-family: var(--sb-font-display);
  font-size: var(--sb-text-3xl);
  font-weight: 500;
  line-height: var(--sb-leading-tight);
  letter-spacing: -0.01em;
  margin: 0 0 var(--sb-space-4);
}
.sb-h2, .sb-page h2 {
  font-family: var(--sb-font-display);
  font-size: var(--sb-text-xl);
  font-weight: 500;
  line-height: var(--sb-leading-tight);
  margin: var(--sb-space-8) 0 var(--sb-space-3);
  color: var(--sb-fg);
}
.sb-h3, .sb-page h3 {
  font-family: var(--sb-font-ui);
  font-size: var(--sb-text-md);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: var(--sb-space-5) 0 var(--sb-space-2);
}
.sb-eyebrow {
  font-size: var(--sb-text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sb-fg-subtle);
}
.sb-lede {
  font-family: var(--sb-font-display);
  font-style: italic;
  font-size: var(--sb-text-lg);
  line-height: 1.45;
  color: var(--sb-fg-muted);
}

.sb-a, .sb-page a {
  color: var(--sb-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--sb-border-strong);
  transition: text-decoration-color var(--sb-dur-fast) var(--sb-ease);
}
.sb-a:hover, .sb-page a:hover { text-decoration-color: currentColor; }

/* ============================================================
   4. Layout primitives
   ============================================================ */

.sb-shell {            /* top-level page container */
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.sb-container {        /* centred, bounded content */
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--sb-space-6);
}
.sb-container--narrow { max-width: 520px; }
.sb-container--wide   { max-width: 1200px; }

.sb-topbar {
  display: flex;
  align-items: center;
  gap: var(--sb-space-4);
  padding: var(--sb-space-4) var(--sb-space-6);
  border-bottom: 1px solid var(--sb-border);
  background: var(--sb-bg);
}
.sb-topbar__brand {
  font-family: var(--sb-font-display);
  font-weight: 500;
  font-size: var(--sb-text-lg);
  letter-spacing: -0.01em;
}
.sb-topbar__brand-dot {
  display: inline-block;
  width: 8px; height: 8px; border-radius: 999px;
  background: var(--sb-rose);
  margin-right: 10px;
  transform: translateY(-2px);
}
.sb-topbar__spacer { flex: 1; }
.sb-topbar__meta {
  font-size: var(--sb-text-xs);
  color: var(--sb-fg-subtle);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sb-stack > * + * { margin-top: var(--sb-space-4); }
.sb-stack-sm > * + * { margin-top: var(--sb-space-2); }
.sb-stack-lg > * + * { margin-top: var(--sb-space-8); }

.sb-row { display: flex; align-items: center; gap: var(--sb-space-3); flex-wrap: wrap; }
.sb-row--between { justify-content: space-between; }

.sb-dotted {
  background-image: radial-gradient(circle, var(--sb-border-strong) 1.2px, transparent 1.4px);
  background-size: 12px 6px;
  background-repeat: repeat-x;
  background-position: 0 50%;
  height: 10px;
}

/* ============================================================
   5. Card surfaces
   ============================================================ */

.sb-card {
  background: var(--sb-bg-raised);
  border: 1px solid var(--sb-border);
  border-radius: var(--sb-r-lg);
  padding: var(--sb-space-6);
  box-shadow: var(--sb-shadow-1);
}
.sb-card--quiet {
  background: var(--sb-bg-sunken);
  box-shadow: none;
}
.sb-card--paper {                /* warm paper card for auth + focused flows */
  background: var(--sb-paper);
  border: 1px solid var(--sb-paper-3);
  border-radius: var(--sb-r-xl);
  padding: var(--sb-space-10);
  box-shadow: var(--sb-shadow-2);
}

.sb-card__title {
  font-family: var(--sb-font-display);
  font-size: var(--sb-text-xl);
  font-weight: 500;
  margin: 0 0 var(--sb-space-2);
}
.sb-card__subtitle {
  color: var(--sb-fg-muted);
  margin: 0 0 var(--sb-space-5);
}

/* ============================================================
   6. Forms
   ============================================================ */

.sb-field {
  display: block;
  margin: 0;
}
.sb-field + .sb-field { margin-top: var(--sb-space-4); }

.sb-label {
  display: block;
  font-size: var(--sb-text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--sb-fg-muted);
  margin-bottom: var(--sb-space-2);
}
.sb-help {
  display: block;
  font-size: var(--sb-text-sm);
  color: var(--sb-fg-subtle);
  margin-top: var(--sb-space-2);
}
.sb-help--ok    { color: var(--sb-success); }
.sb-help--error { color: var(--sb-danger); }

.sb-input,
.sb-select,
.sb-textarea {
  width: 100%;
  font: inherit;
  font-family: var(--sb-font-ui);
  color: var(--sb-fg);
  background: var(--sb-bg-raised);
  border: 1px solid var(--sb-border-strong);
  border-radius: var(--sb-r-md);
  padding: 12px 14px;
  line-height: 1.3;
  transition: border-color var(--sb-dur-fast) var(--sb-ease),
              box-shadow var(--sb-dur-fast) var(--sb-ease);
  -webkit-appearance: none;
  appearance: none;
}
.sb-input:hover, .sb-select:hover, .sb-textarea:hover {
  border-color: var(--sb-fg-muted);
}
.sb-input:focus, .sb-select:focus, .sb-textarea:focus {
  outline: none;
  border-color: var(--sb-fg);
  box-shadow: 0 0 0 3px rgba(15,23,32,0.08);
}
.sb-input::placeholder { color: var(--sb-fg-subtle); }
.sb-input[aria-invalid="true"] {
  border-color: var(--sb-danger);
  box-shadow: 0 0 0 3px rgba(200,104,79,0.18);
}

.sb-textarea { min-height: 96px; resize: vertical; }

/* Checkboxes + radios */
.sb-check {
  display: inline-flex;
  align-items: center;
  gap: var(--sb-space-2);
  font-size: var(--sb-text-sm);
  color: var(--sb-fg-muted);
  cursor: pointer;
}
.sb-check input[type="checkbox"],
.sb-check input[type="radio"] {
  width: 18px; height: 18px;
  accent-color: var(--sb-ink);
}

/* ============================================================
   7. Buttons
   ============================================================ */

.sb-btn {
  --sb-btn-bg: var(--sb-ink);
  --sb-btn-fg: var(--sb-paper);
  --sb-btn-border: var(--sb-ink);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sb-space-2);
  font: 600 var(--sb-text-md) / 1 var(--sb-font-ui);
  letter-spacing: 0.01em;
  padding: 12px 18px;
  border-radius: var(--sb-r-md);
  background: var(--sb-btn-bg);
  color: var(--sb-btn-fg);
  border: 1px solid var(--sb-btn-border);
  cursor: pointer;
  transition: transform var(--sb-dur-fast) var(--sb-ease),
              background-color var(--sb-dur-fast) var(--sb-ease),
              box-shadow var(--sb-dur-fast) var(--sb-ease);
  text-decoration: none;
}
.sb-btn:hover { transform: translateY(-1px); box-shadow: var(--sb-shadow-1); }
.sb-btn:active { transform: translateY(0); }
.sb-btn:focus-visible { outline: 3px solid rgba(15,23,32,0.25); outline-offset: 2px; }
.sb-btn[disabled] {
  opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: none;
}

.sb-btn--ghost {
  --sb-btn-bg: transparent;
  --sb-btn-fg: var(--sb-fg);
  --sb-btn-border: var(--sb-border-strong);
}
.sb-btn--ghost:hover { background: var(--sb-bg-sunken); }

.sb-btn--quiet {
  --sb-btn-bg: var(--sb-bg-sunken);
  --sb-btn-fg: var(--sb-fg);
  --sb-btn-border: transparent;
}

.sb-btn--danger {
  --sb-btn-bg: var(--sb-clay);
  --sb-btn-fg: #FFFFFF;
  --sb-btn-border: var(--sb-clay);
}

.sb-btn--accent {            /* warm rose — reserved for live/session CTAs */
  --sb-btn-bg: var(--sb-rose);
  --sb-btn-fg: var(--sb-ink);
  --sb-btn-border: var(--sb-rose);
}

.sb-btn--sm { padding: 8px 12px; font-size: var(--sb-text-sm); border-radius: var(--sb-r-sm); }
.sb-btn--lg { padding: 16px 22px; font-size: var(--sb-text-lg); border-radius: var(--sb-r-lg); }
.sb-btn--block { width: 100%; }

/* Icon-only + labelled icon button, used in session controls */
.sb-iconbtn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  width: 56px;
  height: 56px;
  border-radius: var(--sb-r-md);
  background: rgba(251,246,239,0.06);
  border: 1px solid rgba(251,246,239,0.12);
  color: inherit;
  font: 500 11px / 1 var(--sb-font-ui);
  letter-spacing: 0.04em;
  cursor: pointer;
}
.sb-iconbtn[aria-pressed="true"] {
  background: var(--sb-paper);
  color: var(--sb-ink);
  border-color: var(--sb-paper);
}
.sb-iconbtn--danger { background: var(--sb-clay); color: #fff; border-color: var(--sb-clay); }

/* ============================================================
   8. Chips / badges
   ============================================================ */

.sb-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: var(--sb-text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--sb-fg-muted);
  background: var(--sb-bg-sunken);
  border: 1px solid var(--sb-border);
  border-radius: var(--sb-r-pill);
}
.sb-chip__dot {
  width: 6px; height: 6px; border-radius: 999px; background: currentColor;
}
.sb-chip--success { color: #2f6b45; background: rgba(111,154,122,0.18); border-color: rgba(111,154,122,0.3); }
.sb-chip--warning { color: #6b5100; background: rgba(227,169,80,0.2);  border-color: rgba(227,169,80,0.4); }
.sb-chip--danger  { color: #7a2f1f; background: rgba(200,104,79,0.18); border-color: rgba(200,104,79,0.3); }
.sb-chip--live    { color: var(--sb-ink); background: rgba(225,127,139,0.22); border-color: rgba(225,127,139,0.5); }

/* ============================================================
   9. Banners / notices
   ============================================================ */

.sb-notice {
  display: flex;
  align-items: flex-start;
  gap: var(--sb-space-3);
  padding: var(--sb-space-4) var(--sb-space-5);
  border-radius: var(--sb-r-md);
  background: var(--sb-paper-2);
  border: 1px solid var(--sb-border);
  color: var(--sb-fg);
}
.sb-notice__icon { font-size: 18px; line-height: 1; margin-top: 2px; color: var(--sb-fg-muted); }
.sb-notice--warning { background: rgba(227,169,80,0.14); border-color: rgba(227,169,80,0.35); }
.sb-notice--danger  { background: rgba(200,104,79,0.14); border-color: rgba(200,104,79,0.35); }
.sb-notice--info    { background: rgba(26,96,174,0.08);  border-color: rgba(26,96,174,0.28); }

/* Setup note (legacy hook — kept working) */
.setup-note {
  background: var(--sb-paper-2);
  border-left: 3px solid var(--sb-accent);
  padding: var(--sb-space-3) var(--sb-space-4);
  border-radius: 0 var(--sb-r-sm) var(--sb-r-sm) 0;
  font-size: var(--sb-text-sm);
  color: var(--sb-fg-muted);
}

/* ============================================================
  10. Lists (library, lobby, recordings)
   ============================================================ */

.sb-list { list-style: none; margin: 0; padding: 0; }
.sb-list__item {
  display: flex;
  align-items: center;
  gap: var(--sb-space-3);
  padding: var(--sb-space-3) var(--sb-space-4);
  border-bottom: 1px solid var(--sb-border);
  background: var(--sb-bg-raised);
}
.sb-list__item:first-child { border-radius: var(--sb-r-md) var(--sb-r-md) 0 0; }
.sb-list__item:last-child  { border-radius: 0 0 var(--sb-r-md) var(--sb-r-md); border-bottom: none; }
.sb-list__item:only-child  { border-radius: var(--sb-r-md); }

.sb-list__title  { font-weight: 500; color: var(--sb-fg); }
.sb-list__meta   { font-size: var(--sb-text-xs); color: var(--sb-fg-subtle); letter-spacing: 0.04em; }
.sb-list__spacer { flex: 1; }

.sb-list--quiet .sb-list__item { background: transparent; border-color: var(--sb-line-soft); }

/* Drop zone (library upload) */
.sb-dropzone {
  border: 1.5px dashed var(--sb-border-strong);
  border-radius: var(--sb-r-lg);
  padding: var(--sb-space-10);
  text-align: center;
  color: var(--sb-fg-muted);
  background: var(--sb-bg-sunken);
  transition: border-color var(--sb-dur-fast) var(--sb-ease),
              background-color var(--sb-dur-fast) var(--sb-ease);
}
.sb-dropzone:hover,
.sb-dropzone--active { border-color: var(--sb-ink); background: var(--sb-paper-2); }

/* ============================================================
  11. Dialog / modal
   ============================================================ */

.sb-dialog {
  border: none;
  border-radius: var(--sb-r-xl);
  background: var(--sb-paper);
  color: var(--sb-fg);
  padding: var(--sb-space-8);
  max-width: 480px;
  box-shadow: var(--sb-shadow-3);
}
.sb-dialog::backdrop { background: rgba(15,23,32,0.35); backdrop-filter: blur(2px); }

/* ============================================================
  12. Session-specific components (warm room)
   ============================================================ */

/* Session shell — dark paper background, full-bleed */
.sb-session {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  padding: var(--sb-space-4);
  background: var(--sb-ink);
  color: var(--sb-paper);
}
.sb-session__stage {
  flex: 1; position: relative; min-height: 0;
  background: #000;
  border-radius: var(--sb-r-lg);
  overflow: hidden;
}
.sb-session__baseline { padding: var(--sb-space-3) 4px; }

/* Breath ring — wrap a video element with this */
.sb-breathring {
  position: absolute; inset: 0;
  border-radius: var(--sb-r-lg);
  box-shadow: inset 0 0 0 4px rgba(225,127,139,0.15);
  transition: box-shadow 80ms ease-out;
  pointer-events: none;
}

/* Name plate overlay */
.sb-nameplate {
  position: absolute;
  left: var(--sb-space-4); top: var(--sb-space-4);
  background: rgba(15,23,32,0.55);
  backdrop-filter: blur(6px);
  padding: 8px 14px;
  border-radius: var(--sb-r-sm);
  z-index: 3;
}
.sb-nameplate__name {
  font-family: var(--sb-font-display);
  font-size: var(--sb-text-lg); font-weight: 500;
  letter-spacing: -0.01em;
}
.sb-nameplate__meta {
  font-size: var(--sb-text-xs); opacity: 0.75;
  letter-spacing: 0.08em; text-transform: uppercase; margin-top: 2px;
}

/* Self preview card */
.sb-selfcard {
  width: 110px; height: 130px;
  border-radius: var(--sb-r-md);
  background: #000;
  position: relative; overflow: hidden;
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  border: 1px solid rgba(251,246,239,0.12);
}
.sb-selfcard video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); }
.sb-selfcard__label {
  position: absolute; left: 8px; bottom: 8px;
  font-size: 10px; font-weight: 600; letter-spacing: 0.1em;
  background: rgba(15,23,32,0.65);
  padding: 3px 8px; border-radius: var(--sb-r-pill);
}

/* Meter bar (dotted-baseline audio meter) */
.sb-meter { display: flex; gap: 2px; align-items: flex-end; height: 24px; }
.sb-meter--reverse { flex-direction: row-reverse; }
.sb-meter__pip {
  width: 3px; background: rgba(251,246,239,0.15); border-radius: 2px;
}
.sb-meter__pip[data-on="true"] { background: #F3ECE0; }
.sb-meter__pip[data-zone="warn"][data-on="true"] { background: var(--sb-amber); }
.sb-meter__pip[data-zone="clip"][data-on="true"] { background: var(--sb-rose); }

.sb-meter__label {
  font-size: 10px; font-weight: 600; letter-spacing: 0.14em;
  color: rgba(251,246,239,0.55); margin: 0 6px;
}
.sb-meter__elapsed {
  font-family: var(--sb-font-display); font-style: italic;
  font-size: var(--sb-text-md); color: rgba(251,246,239,0.85);
}

/* ============================================================
  13. Quality / reconnect / floor-violation — alias legacy classes
   ============================================================ */

.quality-badge {
  padding: 3px 10px; border-radius: var(--sb-r-pill);
  font-size: var(--sb-text-xs); font-weight: 600; letter-spacing: 0.04em;
  text-transform: uppercase;
}
.quality-badge.good { background: rgba(111,154,122,0.2); color: #2f6b45; }
.quality-badge.fair { background: rgba(227,169,80,0.22); color: #6b5100; }
.quality-badge.poor { background: rgba(200,104,79,0.22); color: #7a2f1f; }

.reconnect-banner {
  background: rgba(227,169,80,0.18);
  color: #6b5100;
  padding: var(--sb-space-3) var(--sb-space-4);
  border-radius: var(--sb-r-md);
  text-align: center;
  font-weight: 500;
  border: 1px solid rgba(227,169,80,0.4);
}

.floor-violation {
  background: rgba(200,104,79,0.14);
  color: #7a2f1f;
  padding: var(--sb-space-5);
  border-radius: var(--sb-r-md);
  border: 1px solid rgba(200,104,79,0.35);
}

/* Drop-zone active state (library.js adds this class via classList) */
.drop-zone--active { border-color: var(--sb-ink); background: var(--sb-paper-2); }

.tier-badge {
  display: inline-block;
  font-size: var(--sb-text-xs); font-weight: 600;
  padding: 2px 8px; border-radius: var(--sb-r-sm);
  text-transform: uppercase; letter-spacing: 0.03em;
}
.tier-badge.supported  { background: rgba(111,154,122,0.2); color: #2f6b45; }
.tier-badge.degraded   { background: rgba(227,169,80,0.22); color: #6b5100; }
.tier-badge.unworkable { background: rgba(200,104,79,0.22); color: #7a2f1f; }

/* ============================================================
  14. Auth page layout + brand mark
   ============================================================ */

/* Full-viewport centred layout used by login and signup pages. */
.sb-auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--sb-space-10);
}
.sb-auth-page .sb-card--paper {
  width: 100%;
  max-width: 440px;
}
.sb-auth-page h1 {
  font-size: var(--sb-text-2xl);
  margin-top: var(--sb-space-6);
}

/* Brand mark — the rose dot + wordmark used in auth cards and topbar. */
.sb-brand {
  font-family: var(--sb-font-display);
  font-weight: 500;
  font-size: 20px;
  letter-spacing: -0.01em;
  margin-bottom: var(--sb-space-1);
}
.sb-brand__dot {
  display: inline-block;
  width: 8px; height: 8px; border-radius: var(--sb-r-pill);
  background: var(--sb-rose);
  margin-right: 10px;
  transform: translateY(-2px);
  vertical-align: middle;
}

/* ============================================================
  15. Utilities
   ============================================================ */

/* Layout helpers */
.sb-row--end-align { align-items: flex-end; }
.sb-grow { flex: 1 1 0; min-width: 0; }
.sb-text-sm { font-size: var(--sb-text-sm); }

.sb-mt-0 { margin-top: 0 !important; }
.sb-mt-2 { margin-top: var(--sb-space-2) !important; }
.sb-mt-4 { margin-top: var(--sb-space-4) !important; }
.sb-mt-6 { margin-top: var(--sb-space-6) !important; }
.sb-mt-8 { margin-top: var(--sb-space-8) !important; }

.sb-text-muted { color: var(--sb-fg-muted); }
.sb-text-subtle { color: var(--sb-fg-subtle); }
.sb-text-center { text-align: center; }

.sb-sr-only {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

/* ============================================================
  16. Session v2 layout — three-zone laptop layout
   ============================================================ */

/* Full-viewport shell: stacks body + icon bar + baseline */
.sb-session-v2 {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  background: var(--sb-ink);
  color: var(--sb-paper);
  overflow: hidden;
}

/* Middle row: video zone + optional accompaniment panel */
.sb-session-body {
  flex: 1; min-height: 0;
  display: flex;
}

/* Video zone — fills remaining width; holds remote video + self PiP */
.sb-video-zone {
  flex: 1; min-width: 0;
  position: relative;
  background: #0A1018;
}
.sb-video-zone video {
  width: 100%; height: 100%; object-fit: cover;
}

/* Remote panel fills the zone */
.sb-remote-panel {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
}
.sb-remote-panel video {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
}

/* Breath ring overlaid on remote panel */
.sb-breath-ring {
  position: absolute; inset: 0;
  border-radius: 0;
  box-shadow: inset 0 0 0 4px rgba(225,127,139,0.15);
  transition: box-shadow 80ms ease-out;
  pointer-events: none;
  z-index: 2;
}

/* Name plate overlay */
.sb-name-plate {
  position: absolute; left: 16px; top: 16px;
  background: rgba(15,23,32,0.55);
  backdrop-filter: blur(6px);
  padding: 8px 14px;
  border-radius: var(--sb-r-sm);
  z-index: 3;
}
.sb-name {
  font-family: var(--sb-font-display);
  font-size: var(--sb-text-lg); font-weight: 500;
  letter-spacing: -0.01em;
}
.sb-role {
  font-size: var(--sb-text-xs); opacity: 0.75;
  letter-spacing: 0.08em; text-transform: uppercase; margin-top: 2px;
}

/* Headphones chip */
.sb-hp-chip {
  position: absolute; right: 16px; top: 16px;
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  font-size: var(--sb-text-xs); font-weight: 500;
  border-radius: var(--sb-r-pill);
  z-index: 3;
}
.sb-hp-on  { background: rgba(111,154,122,0.22); color: #2f6b45; }
.sb-hp-off { background: rgba(251,246,239,0.12); color: rgba(251,246,239,0.6); }
.sb-hp-dot { width: 6px; height: 6px; border-radius: 999px; background: currentColor; }

/* Self-view PiP — bottom-left corner of video zone */
.sb-selfpip {
  position: absolute; left: 16px; bottom: 16px;
  width: 120px; height: 90px;
  border-radius: var(--sb-r-md);
  overflow: hidden;
  background: #000;
  border: 1px solid rgba(251,246,239,0.18);
  box-shadow: 0 4px 16px rgba(0,0,0,0.5);
  z-index: 4;
}
.sb-selfpip video {
  width: 100%; height: 100%;
  object-fit: cover;
  transform: scaleX(-1);
}

/* Accompaniment panel — right side, collapsible */
.sb-accmp-panel {
  width: 280px; flex-shrink: 0;
  background: var(--sb-bg-raised, #1A232E);
  border-left: 1px solid var(--sb-border);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.sb-accmp-panel[hidden] { display: none; }

.sb-accmp-panel-inner {
  flex: 1;
  display: flex; flex-direction: column;
  padding: var(--sb-space-4);
  gap: var(--sb-space-3);
}
.sb-accmp-track-name {
  margin: 0;
  font-size: var(--sb-text-sm);
  color: var(--sb-fg-muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.sb-accmp-panel--lobby .sb-accmp-track-name::after {
  content: ' (preview)';
  color: var(--sb-text-muted);
  font-size: var(--sb-text-sm);
}
.sb-accmp-slider {
  width: 100%;
  accent-color: var(--sb-rose);
  cursor: default;
}
.sb-accmp-btn-row {
  display: flex; gap: var(--sb-space-2);
}

/* Icon bar — slim control strip above baseline */
.sb-iconbar {
  display: flex; align-items: center; justify-content: center;
  gap: var(--sb-space-3);
  padding: var(--sb-space-3) var(--sb-space-4);
  background: rgba(10,16,24,0.85);
  border-top: 1px solid rgba(251,246,239,0.08);
}

/* End button — danger colouring */
.sb-iconbtn.sb-end {
  background: var(--sb-clay);
  border-color: var(--sb-clay);
  color: #fff;
}
.sb-iconbtn.sb-end:hover { opacity: 0.88; }

/* Chat badge */
.sb-btn-badge {
  width: 8px; height: 8px;
  border-radius: 999px;
  background: var(--sb-rose);
}

/* Muted banner */
.sb-muted-banner {
  position: absolute; bottom: 80px; left: 50%; transform: translateX(-50%);
  background: rgba(200,104,79,0.9);
  color: #fff;
  padding: 8px 18px;
  border-radius: var(--sb-r-pill);
  font-size: var(--sb-text-sm); font-weight: 600;
  pointer-events: none; z-index: 10;
}

/* Baseline meter strip */
.sb-baseline {
  padding: var(--sb-space-2) var(--sb-space-4);
  background: rgba(10,16,24,0.85);
}
.sb-meter-row {
  display: flex; align-items: center; gap: var(--sb-space-4);
}
.sb-meter-bar {
  display: flex; align-items: center; gap: 6px;
}
.sb-meter-bar.sb-right { flex-direction: row-reverse; }
.sb-meter-label {
  font-size: 10px; font-weight: 600; letter-spacing: 0.14em;
  color: rgba(251,246,239,0.55);
}
.sb-meter-pips { display: flex; gap: 2px; align-items: flex-end; height: 20px; }
.sb-pip { width: 3px; border-radius: 2px; }
.sb-meter-mid {
  flex: 1; text-align: center;
  font-family: var(--sb-font-display); font-style: italic;
  font-size: var(--sb-text-sm); color: rgba(251,246,239,0.85);
}

/* End-call dialog */
.sb-end-dialog {
  border: none;
  border-radius: var(--sb-r-xl);
  background: var(--sb-paper);
  color: var(--sb-ink);
  padding: var(--sb-space-8);
  max-width: 360px;
  box-shadow: var(--sb-shadow-3);
}
.sb-end-dialog::backdrop { background: rgba(15,23,32,0.45); backdrop-filter: blur(2px); }
.sb-end-dialog-actions {
  display: flex; gap: var(--sb-space-3); margin-top: var(--sb-space-6);
  justify-content: flex-end;
}
.sb-btn-cancel {
  padding: 10px 18px; border-radius: var(--sb-r-md);
  background: transparent; border: 1px solid var(--sb-line-strong);
  font: 500 var(--sb-text-sm) var(--sb-font-ui); cursor: pointer; color: var(--sb-fg-muted);
}
.sb-btn-confirm {
  padding: 10px 18px; border-radius: var(--sb-r-md);
  background: var(--sb-clay); border: 1px solid var(--sb-clay);
  font: 600 var(--sb-text-sm) var(--sb-font-ui); cursor: pointer; color: #fff;
}

/* ============================================================
  17. Dashboard layout
   ============================================================ */

.sb-dashboard-nav {
  display: flex; align-items: center; gap: var(--sb-space-4);
  padding: var(--sb-space-4) var(--sb-space-8);
  border-bottom: 1px solid var(--sb-border);
  background: var(--sb-bg);
}
.sb-dashboard-brand {
  font-family: var(--sb-font-display);
  font-size: var(--sb-text-lg); font-weight: 500;
  letter-spacing: -0.01em;
}
.sb-dashboard-room {
  flex: 1;
  font-size: var(--sb-text-sm);
  color: var(--sb-fg-subtle);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.sb-dashboard {
  padding: var(--sb-space-8);
  max-width: 1100px;
  margin: 0 auto;
}
.sb-dashboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sb-space-6);
}
.sb-dashboard-panel {
  background: var(--sb-bg-raised);
  border: 1px solid var(--sb-border);
  border-radius: var(--sb-r-lg);
  padding: var(--sb-space-6);
  box-shadow: var(--sb-shadow-1);
}
.sb-dashboard-panel--wide {
  grid-column: 1 / -1;
}
.sb-dashboard-panel-title {
  font-family: var(--sb-font-display);
  font-size: var(--sb-text-xl); font-weight: 500;
  margin: 0 0 var(--sb-space-4);
}
.sb-dashboard-loading {
  color: var(--sb-fg-subtle);
  font-size: var(--sb-text-sm);
}
.sb-mt-3 { margin-top: var(--sb-space-3) !important; }


/* ============================================================
  18. Entrance motion — staggered fade-up for landing surfaces
   ============================================================ */

@keyframes sb-fade-up {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.sb-fade { animation: sb-fade-up var(--sb-dur-med) var(--sb-ease) both; }
.sb-fade-1 { animation-delay: 0ms; }
.sb-fade-2 { animation-delay: 70ms; }
.sb-fade-3 { animation-delay: 140ms; }
.sb-fade-4 { animation-delay: 210ms; }
.sb-fade-5 { animation-delay: 300ms; }

@media (prefers-reduced-motion: reduce) {
  .sb-fade { animation: none; }
}

/* ============================================================
  19. Teach landing — student join surface
   ============================================================ */

.sb-teach-landing {
  width: 100%;
  max-width: 520px;
  margin: 0 auto;
  padding: var(--sb-space-12) var(--sb-space-6) var(--sb-space-10);
}
.sb-teach-landing > * + * { margin-top: var(--sb-space-3); }
.sb-teach-landing .sb-card--paper { margin-top: var(--sb-space-8); }
.sb-teach-landing__brand {
  font-family: var(--sb-font-display);
  font-weight: 500;
  font-size: var(--sb-text-md);
  letter-spacing: -0.01em;
  color: var(--sb-fg-muted);
}
.sb-teach-landing h1 { margin: 0; }
.sb-teach-landing .sb-lede { margin: var(--sb-space-2) 0 0; }
.sb-teach-landing .sb-dotted { margin: var(--sb-space-6) 0 0; }

/* Lobby list inside teacher.html — wraps the dense JS-rendered <li> rows in
   the design system without requiring JS changes. */
.teacher { padding: var(--sb-space-8) var(--sb-space-6); max-width: 880px; margin: 0 auto; }
.teacher .sb-eyebrow { display: block; }
.teacher h1 { margin-top: var(--sb-space-1); }
.teacher .lobby {
  margin-top: var(--sb-space-6);
  padding: var(--sb-space-5) var(--sb-space-6);
  background: var(--sb-bg-raised);
  border: 1px solid var(--sb-border);
  border-radius: var(--sb-r-lg);
  box-shadow: var(--sb-shadow-1);
}
.teacher .lobby h2 { margin: var(--sb-space-1) 0 var(--sb-space-4); }
.teacher .lobby ul {
  list-style: none;
  margin: 0 0 var(--sb-space-3);
  padding: 0;
}
.teacher .lobby ul:empty { display: none; }
.teacher .lobby ul > li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sb-space-2);
  padding: var(--sb-space-3) 0;
  border-bottom: 1px solid var(--sb-line-soft);
}
.teacher .lobby ul > li:last-child { border-bottom: none; }
.teacher .lobby #lobby-empty {
  margin: 0;
  font-family: var(--sb-font-display);
  font-style: italic;
  color: var(--sb-fg-muted);
}
.teacher .session { margin-top: var(--sb-space-8); }

/* Dashboard — staff-line motif + eyebrowed panel titles */
.sb-dashboard-staffline { margin: 0 var(--sb-space-8); }
.sb-dashboard-panel-eyebrow {
  display: block;
  font-size: var(--sb-text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--sb-fg-subtle);
  margin: 0 0 var(--sb-space-2);
}

/* ============================================================
  Synthesis modal (Sprint 24)
   ============================================================ */

.synth-modal {
  width: min(420px, 95vw);
}

.synth-modal__title {
  font-family: var(--sb-font-display);
  font-size: var(--sb-text-lg);
  font-weight: 500;
  margin: 0 0 var(--sb-space-4);
}

.synth-modal__voices {
  margin-bottom: var(--sb-space-4);
}

.synth-modal__voices-label {
  font-size: var(--sb-text-sm);
  color: var(--sb-fg-subtle);
  margin: 0 0 var(--sb-space-2);
}

.synth-modal__voice-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--sb-space-2);
}

.synth-modal__voice-list li label {
  display: inline-flex;
  align-items: center;
  gap: var(--sb-space-1);
  cursor: pointer;
}

.synth-modal__status {
  margin-top: var(--sb-space-3);
  font-size: var(--sb-text-sm);
  color: var(--sb-fg-subtle);
}

.synth-modal__actions {
  display: flex;
  gap: var(--sb-space-3);
  justify-content: flex-end;
}

.new-variant-btn {
  align-self: flex-start;
}

/* ============================================================
   Library page
   ============================================================ */

.library-page {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: var(--sb-space-8) var(--sb-space-6);
  display: flex;
  flex-direction: column;
  gap: var(--sb-space-6);
}

.library-page__intro h1 { margin: 0 0 var(--sb-space-2); }
.library-page__intro .sb-card__subtitle { margin: 0; }

.library-page__hint {
  margin: 0;
  color: var(--sb-fg-subtle);
  font-size: var(--sb-text-sm);
}

.library-section { display: flex; flex-direction: column; gap: var(--sb-space-3); }
.library-section .sb-card__title { margin: 0; }

/* Asset list — one card per track */
#asset-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sb-space-3);
}

.asset-row {
  background: var(--sb-bg-raised);
  border: 1px solid var(--sb-border);
  border-radius: var(--sb-r-md);
  box-shadow: var(--sb-shadow-1);
  overflow: hidden;
}

.asset-header {
  display: flex;
  align-items: center;
  gap: var(--sb-space-3);
  padding: var(--sb-space-3) var(--sb-space-4);
}

.asset-expand-btn {
  flex: 1;
  min-width: 0;
  text-align: left;
  background: transparent;
  border: none;
  font: inherit;
  font-weight: 500;
  font-size: var(--sb-text-md);
  color: var(--sb-fg);
  padding: var(--sb-space-2) 0;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.asset-expand-btn:hover { color: var(--sb-fg-muted); }
.asset-expand-btn:focus-visible { outline: 3px solid rgba(15,23,32,0.25); outline-offset: 2px; }

.omr-status-slot--failed {
  color: var(--sb-rose);
  cursor: pointer;
  font-size: var(--sb-text-sm);
  text-decoration: underline;
  text-underline-offset: 2px;
  white-space: nowrap;
}
.omr-status-slot--failed:focus-visible { outline: 3px solid rgba(15,23,32,0.25); outline-offset: 2px; }
/* On narrow viewports, wrap the failed slot below the title+controls row so it
   gets its own tap-friendly full-width row instead of squeezing the expand button. */
@media (max-width: 599px) {
  .asset-header { flex-wrap: wrap; }
  .omr-status-slot--failed {
    width: 100%;
    padding-top: var(--sb-space-2);
    border-top: 1px solid var(--sb-border-subtle, var(--sb-border));
    white-space: normal;
  }
}

.asset-meta {
  color: var(--sb-fg-subtle);
  font-size: var(--sb-text-sm);
  white-space: nowrap;
}

.asset-delete-btn {
  background: transparent;
  border: 1px solid var(--sb-border);
  color: var(--sb-fg-muted);
  font: inherit;
  font-size: var(--sb-text-sm);
  padding: 6px 12px;
  border-radius: var(--sb-r-sm);
  cursor: pointer;
  transition: color var(--sb-dur-fast) var(--sb-ease),
              border-color var(--sb-dur-fast) var(--sb-ease);
}
.asset-delete-btn:hover { color: var(--sb-clay); border-color: var(--sb-clay); }
.asset-delete-btn:focus-visible { outline: 3px solid rgba(15,23,32,0.25); outline-offset: 2px; }

.asset-detail {
  padding: var(--sb-space-4);
  border-top: 1px solid var(--sb-border);
  background: var(--sb-bg-sunken);
  display: flex;
  flex-direction: column;
  gap: var(--sb-space-4);
}

.view-score-btn,
.new-variant-btn,
.omr-btn {
  align-self: flex-start;
}

/* OMR section */
.omr-flow {
  display: flex;
  flex-direction: column;
  gap: var(--sb-space-2);
  padding: 0;
  margin: 0;
}

.omr-btn {
  background: var(--sb-fg);
  color: var(--sb-bg);
  border: 1px solid transparent;
  font: inherit;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: var(--sb-r-sm);
  cursor: pointer;
}
.omr-btn:hover:not([disabled]) { transform: translateY(-1px); box-shadow: var(--sb-shadow-1); }
.omr-btn[disabled] { opacity: 0.5; cursor: not-allowed; }

.omr-status {
  margin: 0;
  color: var(--sb-fg-subtle);
  font-size: var(--sb-text-sm);
}

.omr-running-badge {
  font-size: var(--sb-text-sm);
  color: var(--sb-accent);
  margin-left: var(--sb-space-2);
}

.omr-running-badge--error {
  color: var(--sb-rose);
}

.part-picker {
  display: flex;
  flex-direction: column;
  gap: var(--sb-space-2);
  padding: var(--sb-space-3);
  background: var(--sb-bg-raised);
  border: 1px solid var(--sb-border);
  border-radius: var(--sb-r-sm);
}

/* Variant rows */
.variant-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sb-space-2);
}

.variant-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto auto auto;
  grid-template-areas:
    "label  meta    score   resynth delete"
    "audio  audio   audio   audio   audio";
  gap: var(--sb-space-2) var(--sb-space-3);
  align-items: center;
  padding: var(--sb-space-3);
  background: var(--sb-bg-raised);
  border: 1px solid var(--sb-border);
  border-radius: var(--sb-r-sm);
}

.variant-label-text { grid-area: label; font-weight: 500; }
.variant-meta {
  grid-area: meta;
  color: var(--sb-fg-subtle);
  font-size: var(--sb-text-sm);
  white-space: nowrap;
}

.variant-audio {
  grid-area: audio;
  width: 100%;
  margin-top: 0;
  display: block;
}

.variant-resynth-btn,
.variant-score-btn,
.variant-delete-btn {
  background: transparent;
  border: 1px solid var(--sb-border);
  color: var(--sb-fg-muted);
  font: inherit;
  font-size: var(--sb-text-sm);
  padding: 6px 12px;
  border-radius: var(--sb-r-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: color var(--sb-dur-fast) var(--sb-ease),
              border-color var(--sb-dur-fast) var(--sb-ease);
}
.variant-resynth-btn { grid-area: resynth; color: var(--sb-fg); }
.variant-resynth-btn:hover { background: var(--sb-bg-sunken); }
.variant-score-btn { grid-area: score; color: var(--sb-fg); }
.variant-score-btn:hover { background: var(--sb-bg-sunken); }
.variant-delete-btn { grid-area: delete; }
.variant-delete-btn:hover { color: var(--sb-clay); border-color: var(--sb-clay); }

/* Inline messages */
.error {
  margin: 0;
  color: var(--sb-clay);
  font-size: var(--sb-text-sm);
}

.hint {
  margin: 0;
  color: var(--sb-fg-subtle);
  font-size: var(--sb-text-sm);
}

#sidecar-banner {
  margin: 0;
  border-radius: 0;
  border-left: none;
  border-right: none;
  border-top: none;
}
#sidecar-banner button {
  margin-left: auto;
  background: transparent;
  border: none;
  color: inherit;
  cursor: pointer;
  font-size: var(--sb-text-md);
  line-height: 1;
}

@media (max-width: 600px) {
  .library-page { padding: var(--sb-space-4); }
  .variant-row {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "label   meta"
      "audio   audio"
      "score   score"
      "resynth delete";
  }
  .variant-resynth-btn,
  .variant-score-btn,
  .variant-delete-btn { justify-self: stretch; }
  .asset-meta { display: none; }
}

/* ============================================================
   Score modal (Sprint 25)
   ============================================================ */

.score-modal {
  width: min(860px, 96vw);
  max-width: 96vw;
  height: 92vh;
  max-height: 92vh;
  padding: 0;
}
/* display:flex only when the dialog is open — avoids overriding the UA's
   display:none on closed <dialog> elements, which kept the modal always visible. */
.score-modal[open] {
  display: flex;
  flex-direction: column;
}

.score-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sb-space-4) var(--sb-space-6);
  border-bottom: 1px solid var(--sb-border);
  flex-shrink: 0;
}

.score-modal__title {
  font-family: var(--sb-font-display);
  font-size: var(--sb-text-lg);
  font-weight: 500;
  margin: 0;
}

.score-modal__close {
  font-size: var(--sb-text-lg);
  line-height: 1;
  padding: var(--sb-space-1) var(--sb-space-2);
}

.score-modal__audio-bar {
  display: flex;
  align-items: center;
  gap: var(--sb-space-3);
  padding: var(--sb-space-3) var(--sb-space-6);
  border-bottom: 1px solid var(--sb-border);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.score-modal__variant-select {
  flex-shrink: 0;
  max-width: 200px;
}

.score-modal__audio-container {
  flex: 1;
  min-width: 0;
}

.score-modal__audio {
  width: 100%;
  display: block;
}

.score-modal__pages {
  overflow-y: auto;
  flex: 1 1 auto;
  min-height: 0;
  padding: 0;
  display: block;             /* one continuous score, not per-page flex children */
  background: #fff;
}

.score-page {
  position: relative;
  display: block;
  background: #fff;
  /* Subtle separator between pages so a measure split across pages is still
     legible, but no shadow/radius so the score reads as one tall image. */
  border-bottom: 1px dashed var(--sb-border);
}
.score-page:last-child { border-bottom: none; }

.score-page__img {
  display: block;
  width: 100%;
  height: auto;
}

.score-page__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* ============================================================
   20. Session full-screen takeover
   ============================================================ */

/* When a call is active, the session root becomes a fixed full-viewport overlay.
   Body scroll locks so content behind it does not shift. */
.sb-in-session #session-root {
  position: fixed !important;
  inset: 0 !important;
  z-index: 100;
}
.sb-in-session body {
  overflow: hidden;
}

/* Record button — active (recording) state */
.sb-iconbtn.sb-rec--active {
  background: var(--sb-rose);
  border-color: var(--sb-rose);
  color: var(--sb-ink);
}
.sb-iconbtn.sb-rec--pending {
  opacity: 0.5;
  cursor: not-allowed;
}