:root {
  color-scheme: dark;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --color-bg: #141414;
  --color-surface: #1a1a1a;
  --color-surface-raised: #232323;
  --color-surface-soft: #202020;
  --color-border: #343434;
  --color-text: #f5f5f5;
  --color-muted: #b8b8b8;
  --color-accent: #ff4655;
  --color-accent-strong: #ff4655;
  --color-accent-soft: #2a1b1d;
  --color-focus: #8ab4f8;
  --color-success: #86c8a2;
  --color-warning: #e9bd69;
  --color-white: #ffffff;
  --color-sidebar: #101010;
  --color-control-border: #747474;
  --color-media-text: #f4f5f7;
  --color-media-muted: #bec3ce;
  --color-danger: #ff7b73;
  --duration-ui: 140ms;
  --color-black: #000000;
  --color-banner-border: #343434;
  --color-banner-text: #b8b8b8;
  --color-hero-dark: #101010;
  --color-art-blue: #283d4a;
  --color-art-night: #151a20;
  --color-art-wine: #422126;
  --color-art-wine-dark: #171416;
  --color-art-green: #294239;
  --color-art-plum: #3a2940;
  --color-art-plum-dark: #151316;
  --color-art-base: #202124;
  --color-art-base-dark: #101010;
  --color-hero-glow: rgb(255 70 85 / 18%);
  --color-hero-shadow: rgb(0 0 0 / 48%);
  --color-hero-warm: rgb(20 20 20 / 68%);
  --color-glass-white: rgb(255 255 255 / 14%);
  --color-glass-white-strong: rgb(255 255 255 / 30%);
  --color-card-glow: transparent;
  --color-overlay-header: rgb(20 20 20 / 96%);
  --color-overlay-card: rgb(8 9 13 / 60%);
  --color-overlay-hero: rgb(20 20 20 / 60%);
  --color-shadow: rgb(0 0 0 / 32%);
  --font-tiny: 0.75rem;
  --font-xs: 0.75rem;
  --font-label: 0.8125rem;
  --font-eyebrow: 0.8rem;
  --font-body-sm: 0.875rem;
  --font-meta: 0.875rem;
  --font-nav: 0.92rem;
  --font-base: 1rem;
  --font-lede: 1.05rem;
  --font-section: 1.1rem;
  --font-card: 1.15rem;
  --font-brand: 1.25rem;
  --font-h1: clamp(1.75rem, 3vw, 2.5rem);
  --font-h2: clamp(1.375rem, 2vw, 1.5rem);
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-bold: 600;
  --weight-heavy: 600;
  --weight-black: 600;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-pill: 999px;
  --content-width: 76rem;
  --shadow-card: 0 2px 8px var(--color-shadow);
}

* { box-sizing: border-box; }

html { background: var(--color-bg); scroll-behavior: smooth; }

body {
  min-width: 0;
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

button, input, select { color: inherit; font: inherit; }
button, select, input[type="search"], input[type="range"] { accent-color: var(--color-accent); }
a { color: inherit; }
button, a, input, select { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; }

.skip-link {
  position: fixed;
  z-index: 20;
  top: var(--space-3);
  left: var(--space-3);
  transform: translateY(-160%);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: var(--color-bg);
}
.skip-link:focus { transform: translateY(0); }

.shell { width: min(100% - 2 * var(--space-5), var(--content-width)); margin-inline: auto; }
.app-frame { min-height: 100vh; }
.app-frame--player { min-height: 100vh; background: var(--color-black); }
.app-main--player { min-height: 100vh; margin-left: 0; }
.app-frame--player .shell { width: min(100% - 2 * var(--space-4), 110rem); }
.app-frame--player .main-content { min-height: 100vh; padding-block: var(--space-4); }
.app-frame--player .player-layout { width: min(100%, 100rem); margin-inline: auto; }
.app-main { min-width: 0; margin-left: 16rem; }
.app-frame--sidebar-collapsed .site-sidebar { width: 5.25rem; align-items: center; padding-inline: var(--space-2); }
.app-frame--sidebar-collapsed .app-main { margin-left: 5.25rem; }
.app-frame--sidebar-collapsed .brand-word, .app-frame--sidebar-collapsed .sidebar-caption, .app-frame--sidebar-collapsed .nav-label { display: none; }
.app-frame--sidebar-collapsed .primary-nav a, .app-frame--sidebar-collapsed .library-nav a, .app-frame--sidebar-collapsed .secondary-nav a { justify-content: center; padding-inline: var(--space-2); }
.app-frame--sidebar-collapsed .sidebar-collapse-toggle { align-self: center; }
.site-sidebar {
  position: fixed;
  z-index: 12;
  inset: 0 auto 0 0;
  display: flex;
  width: 16rem;
  flex-direction: column;
  gap: var(--space-5);
  overflow-y: auto;
  padding: var(--space-5) var(--space-4);
  border-right: 1px solid var(--color-border);
  background: var(--color-bg);
}
.sidebar-caption { margin: var(--space-2) 0 0; color: var(--color-muted); font-size: var(--font-tiny); font-weight: var(--weight-bold); letter-spacing: 0.12em; text-transform: uppercase; }
.sidebar-caption--secondary { margin-top: var(--space-4); }
.sidebar-navigation { display: flex; min-height: 0; flex: 1; flex-direction: column; gap: var(--space-3); overflow-y: auto; }
.library-nav { display: flex; flex-direction: column; gap: var(--space-2); padding-block: var(--space-3); border-block: 1px solid var(--color-border); }
.secondary-nav { display: flex; flex-direction: column; gap: var(--space-2); }
.sidebar-account-nav { margin-top: auto; padding-top: var(--space-3); border-top: 1px solid var(--color-border); }
.sidebar-collapse-toggle { display: inline-flex; min-height: 2.25rem; align-items: center; justify-content: center; align-self: flex-start; padding-inline: var(--space-2); }
.sidebar-collapse-toggle span[aria-hidden="true"] { font-size: 1.35rem; line-height: 1; }
.button.menu-toggle { display: none; }
.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-overlay-header);
  backdrop-filter: blur(1rem);
}
.header-main {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 4rem;
  padding-block: var(--space-3);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
  color: var(--color-text);
  font-size: var(--font-brand);
  font-weight: var(--weight-black);
  letter-spacing: -0.04em;
  text-decoration: none;
}
.brand-mark {
  display: grid;
  width: 1.75rem;
  aspect-ratio: 1;
  place-items: center;
  border-radius: var(--radius-sm);
  background: var(--color-accent-strong);
  color: var(--color-white);
  font-size: var(--font-nav);
  letter-spacing: 0;
}
.primary-nav, .library-nav { display: flex; flex-direction: column; gap: var(--space-2); }
.primary-nav a, .library-nav a, .secondary-nav a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  gap: var(--space-3);
  padding-inline: var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-muted);
  font-size: var(--font-nav);
  text-decoration: none;
  white-space: nowrap;
}
.primary-nav a:hover, .library-nav a:hover, .secondary-nav a:hover, .primary-nav a[aria-current="page"], .library-nav a[aria-current="page"], .secondary-nav a[aria-current="page"] { background: var(--color-surface-raised); color: var(--color-text); }
.primary-nav a[aria-current="page"], .library-nav a[aria-current="page"], .secondary-nav a[aria-current="page"] { box-shadow: inset 3px 0 0 var(--color-accent); }
.nav-symbol { display: inline-grid; width: 1.25rem; place-items: center; color: var(--color-muted); font-size: 1.1rem; }
.primary-nav a[aria-current="page"] .nav-symbol, .library-nav a[aria-current="page"] .nav-symbol, .secondary-nav a[aria-current="page"] .nav-symbol { color: var(--color-text); }
.header-search { display: flex; width: min(32rem, 100%); gap: var(--space-2); }
.header-search input, .field-control {
  width: 100%;
  min-height: 2.75rem;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}
.header-search input { min-width: 0; flex: 1; }
.header-search input::placeholder, .field-control::placeholder { color: var(--color-muted); opacity: 1; }
.button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--color-accent-strong);
  color: var(--color-white);
  font-weight: var(--weight-bold);
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.button:hover { filter: brightness(1.12); }
.button:disabled { cursor: not-allowed; opacity: 0.52; }
.button--secondary { border-color: var(--color-border); background: var(--color-surface-raised); color: var(--color-text); }
.button--quiet { background: transparent; color: var(--color-text); }
.button--small { min-height: 2.25rem; padding: var(--space-1) var(--space-3); font-size: var(--font-nav); }
.button--saved { border-color: var(--color-success); color: var(--color-success); }

.demo-banner { border-bottom: 1px solid var(--color-banner-border); background: var(--color-accent-soft); color: var(--color-banner-text); }
.demo-banner .shell { display: flex; min-height: 2.5rem; align-items: center; gap: var(--space-2); font-size: var(--font-body-sm); }
.demo-dot { width: 0.5rem; aspect-ratio: 1; border-radius: 50%; background: var(--color-accent); }
.main-content { min-height: 70vh; padding-block: var(--space-6) var(--space-7); }
.page-heading { display: flex; align-items: end; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-5); }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: var(--space-2); font-size: var(--font-h1); line-height: 1.05; letter-spacing: -0.045em; }
h2 { margin-bottom: 0; font-size: var(--font-h2); letter-spacing: -0.025em; }
h3 { margin-bottom: var(--space-2); }
.eyebrow { margin-bottom: var(--space-2); color: var(--color-muted); font-size: var(--font-eyebrow); font-weight: var(--weight-heavy); letter-spacing: 0.12em; text-transform: uppercase; }
.lede { max-width: 48rem; margin-bottom: 0; color: var(--color-muted); font-size: var(--font-lede); }
.muted { color: var(--color-muted); }
.small { font-size: var(--font-meta); }
.demo-label { display: inline-flex; align-items: center; gap: var(--space-2); color: var(--color-warning); font-size: var(--font-label); font-weight: var(--weight-heavy); letter-spacing: 0.06em; text-transform: uppercase; }

.hero {
  position: relative;
  display: flex;
  min-height: clamp(20rem, 43vw, 32rem);
  align-items: end;
  overflow: hidden;
  padding: clamp(var(--space-5), 6vw, var(--space-7));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse at 77% 26%, var(--color-hero-glow), transparent 32%),
    radial-gradient(ellipse at 75% 100%, var(--color-hero-warm), transparent 45%),
    linear-gradient(120deg, var(--color-surface) 10%, var(--color-surface-raised) 58%, var(--color-hero-dark) 100%);
  box-shadow: var(--shadow-card);
  isolation: isolate;
}
.hero::before, .hero::after { position: absolute; z-index: -1; content: ""; }
.hero::before {
  top: 12%;
  right: 10%;
  width: min(34vw, 25rem);
  aspect-ratio: 1;
  border: 1px solid var(--color-glass-white);
  border-radius: 50%;
  background: radial-gradient(circle at 40% 34%, var(--color-glass-white), transparent 50%);
  box-shadow: 0 0 4rem var(--color-hero-shadow);
}
.hero::after {
  inset: 30% 0 0;
  background: linear-gradient(0deg, var(--color-overlay-hero), transparent);
}
.hero-copy { max-width: 42rem; }
.hero-copy h1 { max-width: 12ch; margin-top: var(--space-3); }
.hero-copy p { max-width: 38rem; color: var(--color-muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-5); }

.resume-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 25rem), 1fr)); gap: var(--space-4); }
.resume-card { display: grid; grid-template-columns: minmax(7rem, 10rem) minmax(0, 1fr); overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.resume-art { min-height: 100%; background: linear-gradient(145deg, var(--color-art-blue), var(--color-art-night) 66%); }
.resume-art[data-art="wine"] { background: linear-gradient(145deg, var(--color-art-wine), var(--color-art-wine-dark)); }
.resume-art[data-art="green"] { background: linear-gradient(145deg, var(--color-art-green), var(--color-art-night)); }
.resume-copy { display: grid; align-content: center; justify-items: start; gap: var(--space-2); padding: var(--space-4); }
.resume-copy h3, .resume-copy p { margin: 0; }
.resume-copy p:not(.eyebrow) { color: var(--color-muted); font-size: var(--font-body-sm); }

.course-poster-slot { display: grid; width: min(100%, 34rem); grid-template-columns: minmax(8rem, 11rem) minmax(0, 1fr); gap: var(--space-4); align-items: center; padding: var(--space-4); border: 1px dashed var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.course-poster-art { display: grid; min-height: 14rem; aspect-ratio: 9 / 16; place-items: center; padding: var(--space-3); border-radius: var(--radius-sm); background: radial-gradient(ellipse at 50% 32%, var(--color-art-blue), transparent 58%), linear-gradient(160deg, var(--color-art-base), var(--color-art-base-dark)); color: var(--color-muted); text-align: center; }
.course-poster-copy h3, .course-poster-copy p { margin-block: var(--space-2); }
.course-poster-copy p:last-child { color: var(--color-muted); font-size: var(--font-body-sm); }

.section-block { margin-top: var(--space-7); }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); margin-bottom: var(--space-4); }
.section-actions { display: flex; align-items: center; gap: var(--space-2); }
.section-link { color: var(--color-muted); font-size: var(--font-nav); text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
.section-link:hover { color: var(--color-text); }
.icon-button {
  display: inline-grid;
  width: 2.5rem;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
}
.icon-button:hover { background: var(--color-surface-soft); }
.card-rail { display: grid; grid-auto-columns: minmax(14rem, 20rem); grid-auto-flow: column; gap: var(--space-4); overflow-x: auto; padding: var(--space-1) var(--space-1) var(--space-3); scroll-snap-type: x mandatory; scrollbar-color: var(--color-border) transparent; }
.content-card { min-width: 0; scroll-snap-align: start; }
.card-link { display: block; color: inherit; text-decoration: none; }
.card-link:focus-visible { border-radius: var(--radius-md); }
.card-art {
  position: relative;
  display: flex;
  min-height: 10rem;
  align-items: end;
  overflow: hidden;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-art-base), var(--color-art-base-dark) 68%);
}
.card-art::before { position: absolute; inset: 0; background: radial-gradient(ellipse at 76% 18%, var(--color-card-glow), transparent 38%); content: ""; }
.card-art::after { position: absolute; top: var(--space-3); right: var(--space-3); padding: var(--space-1) var(--space-2); border: 1px solid var(--color-glass-white-strong); border-radius: var(--radius-pill); background: var(--color-overlay-card); color: var(--color-text); content: "DEMO"; font-size: var(--font-tiny); font-weight: var(--weight-black); letter-spacing: 0.1em; }
.card-art[data-art="motion"] { background: linear-gradient(135deg, var(--color-art-blue), var(--color-art-night) 70%); }
.card-art[data-art="color"] { background: linear-gradient(135deg, var(--color-art-wine), var(--color-art-wine-dark) 72%); }
.card-art[data-art="grid"] { background: linear-gradient(135deg, var(--color-art-green), var(--color-surface-raised) 72%); }
.card-art[data-art="collection"] { background: linear-gradient(135deg, var(--color-art-plum), var(--color-art-plum-dark) 72%); }
.card-art-title { position: relative; z-index: 1; max-width: 17ch; font-size: var(--font-card); font-weight: var(--weight-heavy); line-height: 1.15; }
.card-meta { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); padding-top: var(--space-3); }
.card-meta p { margin: 0; color: var(--color-muted); font-size: var(--font-meta); }
.card-meta .card-title { color: var(--color-text); font-size: var(--font-base); font-weight: var(--weight-bold); }
.saved-indicator { color: var(--color-success) !important; font-size: var(--font-xs) !important; }
.card-save { margin-top: var(--space-2); }

.callout, .empty-state, .notice-panel {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
.empty-state { display: grid; min-height: 13rem; align-content: center; justify-items: start; gap: var(--space-3); }
.empty-state p { max-width: 40rem; margin: 0; color: var(--color-muted); }
.callout { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); }
.callout p { margin: var(--space-2) 0 0; color: var(--color-muted); }
.integration-status-list { display: grid; gap: var(--space-3); margin: var(--space-4) 0 0; padding: 0; list-style: none; }
.integration-status-item { display: flex; flex-wrap: wrap; align-items: start; justify-content: space-between; gap: var(--space-3); padding: var(--space-3) 0; border-top: 1px solid var(--color-border); }
.integration-status-item p { max-width: 48rem; margin: var(--space-1) 0 0; color: var(--color-muted); font-size: var(--font-body-sm); }
.status-chip { display: inline-flex; min-height: 1.75rem; align-items: center; padding: 0 var(--space-2); border: 1px solid var(--color-border); border-radius: var(--radius-pill); color: var(--color-warning); font-size: var(--font-tiny); font-weight: var(--weight-bold); white-space: nowrap; }
.status-chip[data-status="demo-only"] { color: var(--color-muted); }
.status-chip[data-status="available"] { color: var(--color-success); }
.status-chip[data-status="processing"] { color: var(--color-focus); }
.status-chip[data-status="failed"] { color: var(--color-warning); }
.library-boundary { margin-block: 0 var(--space-5); }
.library-boundary p { margin: var(--space-2) 0 0; color: var(--color-muted); }

.filters {
  display: grid;
  grid-template-columns: minmax(14rem, 2fr) minmax(10rem, 1fr) minmax(10rem, 1fr) auto;
  align-items: end;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
.field { display: grid; gap: var(--space-2); }
.field label { color: var(--color-muted); font-size: var(--font-meta); font-weight: var(--weight-medium); }
.results-summary { margin-bottom: var(--space-4); color: var(--color-muted); }
.results-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr)); gap: var(--space-5) var(--space-4); }
.filter-chips { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-4); }
.chip { display: inline-flex; min-height: 2rem; align-items: center; gap: var(--space-2); padding: var(--space-1) var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-pill); background: var(--color-surface-raised); color: var(--color-muted); font-size: var(--font-body-sm); cursor: pointer; }
.chip:hover { border-color: var(--color-focus); color: var(--color-text); }

.detail-layout { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(17rem, 0.65fr); gap: var(--space-6); align-items: start; }
.detail-art { min-height: 19rem; }
.detail-copy { padding-top: var(--space-3); }
.detail-copy .lede { margin-block: var(--space-4); }
.detail-actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-block: var(--space-5); }
.metadata-list { display: grid; gap: var(--space-3); margin: 0; }
.metadata-row { display: grid; grid-template-columns: minmax(7rem, 0.45fr) 1fr; gap: var(--space-3); padding-bottom: var(--space-3); border-bottom: 1px solid var(--color-border); }
.metadata-row dt { color: var(--color-muted); }
.metadata-row dd { margin: 0; }
.collection-items { display: grid; gap: var(--space-3); margin-top: var(--space-5); }
.collection-item { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); padding: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); }
.collection-item p { margin: var(--space-1) 0 0; color: var(--color-muted); font-size: var(--font-meta); }

.player-exit { width: 3rem; aspect-ratio: 1; border-radius: 50%; font-size: 1.5rem; }
.player-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(15rem, 18rem); gap: var(--space-5); align-items: start; }
.player-main { min-width: 0; }
.player-wrap { overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-black); }
.player-wrap video { display: block; width: 100%; max-height: 70vh; aspect-ratio: 16 / 9; background: var(--color-black); object-fit: contain; }
.player-status { min-height: 1.75rem; margin: var(--space-3) 0; color: var(--color-muted); }
.player-status[role="alert"] { color: var(--color-warning); }
.player-controls { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); padding: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.player-controls .field { display: flex; align-items: center; gap: var(--space-2); }
.player-controls label { color: var(--color-muted); font-size: var(--font-body-sm); }
.player-controls select { min-height: 2.25rem; padding: var(--space-1) var(--space-2); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface-raised); }
.volume-control { width: min(8rem, 30vw); }
.player-side { padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.player-side h2 { margin-bottom: var(--space-3); font-size: var(--font-section); }
.player-side details { margin-top: var(--space-3); }
.player-side summary { min-height: 2.5rem; cursor: pointer; }
.player-side ol { display: grid; gap: var(--space-2); padding-left: var(--space-5); }
.player-side a { color: var(--color-muted); text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
.player-side a[aria-current="true"] { color: var(--color-text); font-weight: var(--weight-heavy); }
.player-note { margin-top: var(--space-4); color: var(--color-muted); font-size: var(--font-body-sm); }


.player-context { margin: var(--space-2) 0; color: var(--color-muted); font-size: var(--font-body-sm); }
.player-timeline { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: var(--space-3); margin-block: var(--space-2); }
.player-timeline progress { width: 100%; height: 0.45rem; accent-color: var(--color-accent); }
.player-time { color: var(--color-muted); font-size: var(--font-body-sm); font-variant-numeric: tabular-nums; white-space: nowrap; }
.player-lesson-description { margin-top: var(--space-5); padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.player-lesson-description h2 { margin-bottom: var(--space-2); font-size: var(--font-section); }
.player-lesson-description p:last-child { margin-bottom: 0; }
.player-outline-note, .player-outline-empty { margin: var(--space-3) 0; color: var(--color-muted); font-size: var(--font-body-sm); }
.player-module { margin-top: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface-raised); }
.player-module summary { display: flex; min-height: 2.75rem; align-items: center; justify-content: space-between; gap: var(--space-3); padding: var(--space-2) var(--space-3); cursor: pointer; }
.player-module-title { color: var(--color-text); font-weight: var(--weight-bold); }
.player-module-count { color: var(--color-muted); font-size: var(--font-body-sm); white-space: nowrap; }
.player-module-description { margin: 0; padding: 0 var(--space-3) var(--space-3); color: var(--color-muted); font-size: var(--font-body-sm); }
.player-lesson-list { display: grid; gap: var(--space-2); margin: 0; padding: 0 var(--space-3) var(--space-3) !important; list-style: none; }
.player-lesson-item { min-width: 0; }
.player-lesson-link { display: grid; grid-template-columns: minmax(0, 1fr); align-items: center; gap: var(--space-3); padding: var(--space-2); border: 1px solid var(--color-border); border-radius: var(--radius-sm); color: var(--color-text); text-decoration: none; }
.player-lesson-link:hover, .player-lesson-link:focus-visible { border-color: var(--color-accent); background: var(--color-surface-soft); }
.player-lesson-item.is-current .player-lesson-link { border-color: var(--color-accent); background: var(--color-surface-soft); }
.player-lesson-poster { display: block; aspect-ratio: 16 / 9; overflow: hidden; border-radius: var(--radius-sm); background: var(--color-black); }
.player-lesson-poster img { display: block; width: 100%; height: 100%; object-fit: cover; }
.player-lesson-art { display: grid; height: 100%; align-content: center; justify-items: start; gap: 0.15rem; padding: var(--space-2); background: radial-gradient(ellipse at 80% 18%, var(--color-art-blue), transparent 52%), linear-gradient(145deg, var(--color-art-base), var(--color-art-base-dark)); color: var(--color-text); }
.player-lesson-art-kicker { font-size: 0.55rem; font-weight: var(--weight-heavy); letter-spacing: 0.1em; }
.player-lesson-art strong { font-size: var(--font-body-sm); }
.player-lesson-art-title { max-width: 100%; overflow: hidden; color: var(--color-muted); font-size: var(--font-tiny); text-overflow: ellipsis; white-space: nowrap; }
.player-lesson-copy { display: grid; min-width: 0; gap: 0.2rem; }
.player-lesson-title { font-size: var(--font-body-sm); font-weight: var(--weight-bold); line-height: 1.3; }
.player-lesson-current { display: inline-block; margin-left: var(--space-1); color: var(--color-accent); font-size: var(--font-tiny); font-weight: var(--weight-bold); }
.player-lesson-access { color: var(--color-muted); font-size: var(--font-tiny); font-weight: var(--weight-bold); }
.player-lesson-excerpt { display: -webkit-box; overflow: hidden; color: var(--color-muted); font-size: var(--font-tiny); line-height: 1.35; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.player-lesson-action { color: var(--color-muted); font-size: var(--font-tiny); text-decoration: underline; text-underline-offset: 0.2em; }
@media (max-width: 30rem) {
  .player-lesson-link { padding: var(--space-1); }
  .player-module summary { align-items: start; }
}

.site-footer { border-top: 1px solid var(--color-border); padding-block: var(--space-5); color: var(--color-muted); font-size: var(--font-body-sm); }
.footer-content { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3); }
.footer-content p { margin: 0; }
.footer-links { display: flex; gap: var(--space-4); }
.footer-links a { text-underline-offset: 0.2em; }
.toast {
  position: fixed;
  z-index: 30;
  right: var(--space-4);
  bottom: var(--space-4);
  max-width: min(28rem, calc(100% - 2 * var(--space-4)));
  padding: var(--space-3) var(--space-4);
  transform: translateY(1rem);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-raised);
  color: var(--color-text);
  opacity: 0;
  pointer-events: none;
  transition: opacity 150ms ease, transform 150ms ease;
}
.toast.is-visible { transform: translateY(0); opacity: 1; pointer-events: auto; }
.toast-action { margin-left: var(--space-2); border: 0; padding: 0.2rem 0.35rem; background: transparent; color: var(--color-link, var(--color-text)); font: inherit; font-weight: var(--weight-heavy); text-decoration: underline; text-underline-offset: 0.2em; cursor: pointer; }
.toast-action:focus-visible { outline: 2px solid currentColor; outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; clip-path: inset(50%); }

@media (max-width: 70rem) {
  .site-sidebar { width: 14rem; }
  .app-main { margin-left: 14rem; }
  .app-frame--sidebar-collapsed .site-sidebar { width: 5.25rem; }
  .app-frame--sidebar-collapsed .app-main { margin-left: 5.25rem; }
}

@media (max-width: 48rem) {
  .shell { width: min(100% - 2 * var(--space-4), var(--content-width)); }
  .app-main { margin-left: 0; }
  .site-sidebar { position: relative; inset: auto; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; width: 100%; min-height: 0; gap: var(--space-3); padding: var(--space-3) var(--space-4); border-right: 0; border-bottom: 1px solid var(--color-border); }
  .app-frame--sidebar-collapsed .site-sidebar { width: 100%; align-items: center; padding: var(--space-3) var(--space-4); }
  .app-frame--sidebar-collapsed .app-main { margin-left: 0; }
  .app-frame--sidebar-collapsed .brand-word, .app-frame--sidebar-collapsed .nav-label { display: inline; }
  .app-frame--sidebar-collapsed .sidebar-caption { display: block; }
  .app-frame--sidebar-collapsed .primary-nav a, .app-frame--sidebar-collapsed .library-nav a, .app-frame--sidebar-collapsed .secondary-nav a { justify-content: flex-start; padding-inline: var(--space-3); }
  .sidebar-collapse-toggle { display: none; }
  .button.menu-toggle { display: inline-flex; grid-column: 2; grid-row: 1; }
  .sidebar-navigation { display: none; grid-column: 1 / -1; width: 100%; max-height: calc(100vh - 6rem); padding-top: var(--space-2); }
  .sidebar-navigation.is-open { display: flex; }
  .sidebar-caption { display: block; }
  .primary-nav, .library-nav, .secondary-nav { width: 100%; margin-left: 0; flex-direction: column; gap: var(--space-1); overflow: visible; }
  .primary-nav a, .secondary-nav a { min-height: 2.75rem; padding-inline: var(--space-3); font-size: var(--font-nav); }
  .primary-nav a[aria-current="page"], .library-nav a[aria-current="page"], .secondary-nav a[aria-current="page"] { box-shadow: inset 3px 0 0 var(--color-accent); }
  .nav-symbol { display: inline-grid; }
  .header-main { justify-content: stretch; }
  .site-header { top: 0; }
  .hero { min-height: 24rem; }
  .hero::before { top: 5%; right: -4%; width: 16rem; }
  .page-heading, .section-heading { align-items: start; }
  .section-heading { flex-wrap: wrap; }
  .filters { grid-template-columns: 1fr 1fr; }
  .filters .field:first-child { grid-column: 1 / -1; }
  .filters .button { align-self: end; }
  .detail-layout, .player-layout { grid-template-columns: 1fr; }
  .detail-art { min-height: 14rem; }
  .player-side { order: 2; }
  .card-rail { grid-auto-columns: minmax(14rem, 72vw); }
  .callout { align-items: start; flex-direction: column; }
}

@media (max-width: 30rem) {
  .site-sidebar { align-items: center; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-2); }
  .sidebar-navigation { max-height: calc(100vh - 5rem); }
  .primary-nav, .library-nav, .secondary-nav { width: 100%; margin-left: 0; justify-content: initial; }
  .primary-nav a, .secondary-nav a { font-size: var(--font-nav); }
  .filters { grid-template-columns: 1fr; }
  .filters .field:first-child { grid-column: auto; }
  .hero { min-height: 27rem; padding: var(--space-5); }
  .hero-actions .button { flex: 1 1 auto; }
  .course-poster-slot { grid-template-columns: minmax(6rem, 8rem) minmax(0, 1fr); gap: var(--space-3); padding: var(--space-3); }
  .course-poster-art { min-height: 10rem; }
  .resume-card { grid-template-columns: minmax(5.5rem, 7rem) minmax(0, 1fr); }
  .resume-copy { padding: var(--space-3); }
  .metadata-row { grid-template-columns: 1fr; gap: var(--space-1); }
  .section-actions { margin-left: auto; }
  .footer-content { flex-direction: column; }
  .player-controls { align-items: stretch; }
  .player-controls .button, .player-controls .field { flex: 1 1 40%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}
/* Preview administration: grouped navigation adapted from the KAI layout concept. */
.admin-navigation { display: grid; gap: 1rem; padding-block: 1rem 2rem; }
.admin-navigation a[aria-current="page"] { border-color: currentColor; }
.measurement-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr)); gap: 1rem; margin-block: 1rem; }
.measurement-stat { display: grid; gap: .5rem; padding: 1rem; border: 1px solid var(--color-border); border-radius: .75rem; }
.measurement-stat strong { font-size: 1.75rem; }
.content-card--course .card-art { aspect-ratio: 2 / 3; }
[hidden] { display: none !important; }

/* Course detail: clear access, outline, and verified course facts. */
.course-page { padding-bottom: var(--space-8); }
.course-hero { display: grid; grid-template-columns: minmax(16rem, 0.8fr) minmax(0, 1.2fr); gap: var(--space-6); align-items: stretch; padding: var(--space-5); border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: linear-gradient(135deg, var(--color-surface), var(--color-surface-raised)); }
.course-cover { position: relative; min-height: 20rem; overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: linear-gradient(145deg, var(--color-art-plum), var(--color-art-night) 72%); }
.course-cover-image { display: block; width: 100%; height: 100%; min-height: 20rem; object-fit: cover; }
.course-cover--placeholder { display: flex; flex-direction: column; align-items: flex-start; justify-content: space-between; padding: var(--space-5); color: var(--color-text); }
.course-cover--placeholder::before { position: absolute; inset: 12% -8% 18% 22%; border: 1px solid var(--color-glass-white-strong); border-radius: 50%; transform: rotate(-24deg); content: ""; }
.course-cover--placeholder::after { position: absolute; inset: 24% 10% 8% 38%; border: 1px solid var(--color-glass-white-strong); border-radius: 50%; transform: rotate(28deg); content: ""; }
.course-cover--demo { background: radial-gradient(ellipse at 72% 28%, var(--color-art-blue), transparent 35%), linear-gradient(145deg, var(--color-art-plum), var(--color-art-night) 72%); }
.course-cover-kicker, .course-cover-caption, .course-cover-mark { position: relative; z-index: 1; }
.course-cover-kicker, .course-cover-caption { color: var(--color-glass-white); font-size: var(--font-tiny); font-weight: var(--weight-heavy); letter-spacing: .1em; text-transform: uppercase; }
.course-cover-mark { align-self: center; color: var(--color-glass-white-strong); font-size: clamp(5rem, 14vw, 10rem); font-weight: var(--weight-black); line-height: 1; }
.course-hero-copy { display: flex; min-width: 0; flex-direction: column; justify-content: center; }
.course-hero-copy h1 { margin: var(--space-2) 0 0; font-size: clamp(2rem, 4vw, 3.75rem); line-height: 1.04; overflow-wrap: anywhere; }
.course-badges, .course-hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
.course-facts { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: var(--space-4) 0 0; padding: 0; list-style: none; }
.course-fact { display: grid; gap: .15rem; padding: var(--space-2) var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface-soft); color: var(--color-text); }
.course-fact--creator span { color: var(--color-muted); font-size: var(--font-tiny); }
.course-hero-actions { margin-top: var(--space-5); }
.course-access-note { margin: var(--space-3) 0 0; color: var(--color-muted); font-size: var(--font-body-sm); }
.course-body-grid { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(16rem, .55fr); gap: var(--space-6); align-items: start; }
.course-outline { min-width: 0; }
.course-modules { display: grid; gap: var(--space-3); }
.course-module { overflow: hidden; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.course-module summary { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); min-height: 3.5rem; padding: var(--space-3) var(--space-4); cursor: pointer; font-weight: var(--weight-heavy); }
.course-module summary:focus-visible { outline: 2px solid var(--color-accent); outline-offset: -2px; }
.course-module-title { min-width: 0; overflow-wrap: anywhere; }
.course-module-count { flex: 0 0 auto; color: var(--color-muted); font-size: var(--font-meta); font-weight: var(--weight-normal); }
.course-module-body { display: grid; gap: var(--space-3); padding: 0 var(--space-4) var(--space-4); }
.course-module-note, .course-outline-note { margin: 0; color: var(--color-muted); font-size: var(--font-body-sm); }
.course-outline-note { margin-bottom: var(--space-3); }
.course-preview { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3); padding: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface-soft); }
.course-preview > div { display: grid; min-width: min(100%, 14rem); gap: var(--space-1); }
.course-preview p { margin: 0; color: var(--color-muted); font-size: var(--font-meta); }
.course-details { position: sticky; top: calc(var(--space-6) + 1rem); min-width: 0; padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.course-details h2 { margin-top: 0; }
.course-details-note { color: var(--color-muted); font-size: var(--font-body-sm); }
.course-details .section-block { border-top: 1px solid var(--color-border); padding-top: var(--space-3); }
.course-details .section-block h2 { font-size: var(--font-base); }
.course-outline-empty { margin-top: 0; }
@media (max-width: 48rem) {
  .course-hero, .course-body-grid { grid-template-columns: 1fr; }
  .course-hero { padding: var(--space-3); gap: var(--space-4); }
  .course-cover, .course-cover-image { min-height: 0; aspect-ratio: 16 / 9; }
  .course-details { position: static; }
  .course-module summary { align-items: flex-start; flex-direction: column; gap: var(--space-1); }
  .course-preview { align-items: stretch; flex-direction: column; }
  .course-preview .button { width: 100%; justify-content: center; }
}

.course-related-reason { margin: var(--space-2) 0 0; color: var(--color-muted); font-size: var(--font-meta); }


/* P6 recommendations: explain signals and keep browser-only controls readable. */
.recommendation-explanation { max-width: 72rem; color: var(--color-muted); font-size: var(--font-body-sm); }
.recommendation-empty { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3); padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); }
.recommendation-empty p { flex: 1 1 22rem; margin: 0; color: var(--color-muted); }
.recommendation-controls { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin-top: var(--space-3); }
.recommendation-controls .button { min-height: 2.75rem; }
.creator-follow { flex: 0 0 auto; }
@media (max-width: 30rem) {
  .recommendation-empty { align-items: stretch; flex-direction: column; }
  .recommendation-empty .button { justify-content: center; }
  .recommendation-controls { align-items: stretch; flex-direction: column; }
  .recommendation-controls .button { justify-content: center; }
}


/* P7: calendar navigation and event agenda */
.event-calendar-demo { margin-block: var(--space-4); }
.event-calendar-controls { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3); margin-block: var(--space-4); }
.event-calendar-view, .event-calendar-navigation, .event-calendar-filters { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
.event-calendar-period { margin-block: var(--space-3); }
.event-calendar-filters { margin-block: var(--space-3); }
.event-calendar-filter { display: inline-flex; align-items: center; gap: var(--space-2); min-height: 2.5rem; padding: var(--space-2) var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-sm); text-decoration: none; }
.event-calendar-filter[aria-current="page"] { border-color: var(--color-text); background: var(--color-surface-raised); }
.event-calendar-filter__count { color: var(--color-muted); font-variant-numeric: tabular-nums; }
.event-calendar-grid-wrap { width: 100%; overflow: visible; }
.event-calendar-table { width: 100%; table-layout: fixed; border-collapse: separate; border-spacing: var(--space-1); }
.event-calendar-table th { padding: var(--space-2); color: var(--color-muted); font-size: var(--font-body-sm); font-weight: 600; text-align: center; }
.event-calendar-table td { padding: 0; vertical-align: top; }
.event-calendar-day { display: flex; min-height: 4.25rem; flex-direction: column; align-items: flex-start; gap: var(--space-1); padding: var(--space-2); border: 1px solid var(--color-border); border-radius: var(--radius-sm); color: var(--color-text); text-decoration: none; }
.event-calendar-day:hover { background: var(--color-surface-raised); }
.event-calendar-day--outside { opacity: .5; }
.event-calendar-day--today { outline: 2px solid currentColor; outline-offset: 1px; }
.event-calendar-day__number { font-variant-numeric: tabular-nums; }
.event-calendar-day__count { max-width: 100%; padding: 0 var(--space-1); border-radius: 999px; background: var(--color-surface-raised); color: var(--color-muted); font-size: .7rem; line-height: 1.35; white-space: nowrap; }
.event-calendar-timezone { margin-block: var(--space-3); color: var(--color-muted); overflow-wrap: anywhere; }
.event-calendar-agenda, .event-calendar-unscheduled { margin-block: var(--space-5); }
.event-agenda-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr)); gap: var(--space-3); }
.event-agenda-card { min-width: 0; overflow-wrap: anywhere; }
.event-agenda-card h3 { margin-block: var(--space-2); }
.event-agenda-card p { margin-block: var(--space-2); }
.event-agenda-card__heading { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-2); }
.event-kind { display: inline-flex; min-height: 1.75rem; align-items: center; padding-inline: var(--space-2); border: 1px solid var(--color-border); border-radius: 999px; font-size: var(--font-body-sm); }
@media (max-width: 30rem) {
  .event-calendar-controls { align-items: stretch; }
  .event-calendar-view, .event-calendar-navigation { justify-content: space-between; }
  .event-calendar-navigation .button { flex: 1; }
  .event-calendar-table { border-spacing: 2px; }
  .event-calendar-table th { padding: var(--space-1) 0; }
  .event-calendar-day { min-height: 3rem; align-items: center; padding: var(--space-1) 0; }
  .event-calendar-day__count { font-size: .62rem; }
}


/* P8 — Conta e autoatendimento */
.account-center-summary { margin-block: var(--space-5); }
.account-center-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: stretch;
  gap: var(--space-4);
}
.account-center-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
}
.account-center-card h2 { margin-block: var(--space-2); }
.account-center-card p { max-width: 48rem; margin: var(--space-2) 0; color: var(--color-muted); }
.account-center-status {
  display: inline-flex;
  min-height: 1.75rem;
  align-items: center;
  padding: 0 var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-muted);
  font-size: var(--font-body-sm);
}
.account-center-status--available { color: var(--color-success); }
.account-center-status--unavailable { color: var(--color-muted); }
.account-center-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: auto;
  padding-top: var(--space-3);
}
@media (max-width: 760px) {
  .account-center-grid { grid-template-columns: minmax(0, 1fr); }
}

/* P9 — empty chat shell; the preview never accepts a message */
.chat-preview-workspace {
  display: flex;
  width: min(100%, 72rem);
  min-height: min(65vh, 48rem);
  flex-direction: column;
  gap: var(--space-5);
  margin-inline: auto;
  padding: clamp(var(--space-4), 3vw, var(--space-6));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(ellipse at 50% 0%, var(--color-hero-glow), transparent 44%),
    var(--color-surface);
  box-shadow: var(--shadow-card);
}
.chat-preview-intro {
  max-width: 44rem;
  margin-inline: auto;
  text-align: center;
}
.chat-preview-intro h2 { margin-bottom: var(--space-2); }
.chat-preview-intro > p:last-child { margin-bottom: 0; color: var(--color-muted); }
.chat-preview-status {
  display: flex;
  width: min(100%, 64rem);
  align-items: flex-start;
  gap: var(--space-3);
  margin-inline: auto;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-banner-border);
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-banner-text);
}
.chat-preview-status-indicator {
  width: .65rem;
  aspect-ratio: 1;
  flex: 0 0 auto;
  margin-top: .45rem;
  border-radius: 50%;
  background: var(--color-warning);
}
.chat-preview-status p { max-width: 72ch; margin-bottom: var(--space-2); }
.chat-preview-status p:last-child { margin-bottom: 0; }
.chat-preview-status .demo-label { color: var(--color-warning); }
.chat-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}
.chat-preview-prompt {
  min-width: 0;
  min-height: 12rem;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-surface-raised);
}
.chat-preview-prompt h3 { margin-block: var(--space-2); }
.chat-preview-prompt p:last-child { margin-bottom: 0; }
.chat-preview-prompt-example {
  color: var(--color-text);
  font-style: italic;
  overflow-wrap: anywhere;
}
.chat-preview-prompt-scope {
  color: var(--color-muted);
  font-size: var(--font-body-sm);
}
.chat-preview-composer {
  width: min(100%, 64rem);
  min-width: 0;
  margin: auto auto 0;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-raised);
}
.chat-preview-composer:disabled { opacity: 1; }
.chat-preview-composer legend {
  padding-inline: var(--space-2);
  color: var(--color-muted);
  font-size: var(--font-body-sm);
  font-weight: var(--weight-medium);
}
.chat-preview-label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-muted);
  font-size: var(--font-body-sm);
}
.chat-preview-composer-controls {
  display: flex;
  min-width: 0;
  align-items: stretch;
  gap: var(--space-2);
}
.chat-preview-composer textarea {
  min-width: 0;
  min-height: 2.75rem;
  flex: 1 1 auto;
  resize: vertical;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font: inherit;
}
.chat-preview-composer textarea:disabled {
  color: var(--color-muted);
  cursor: not-allowed;
  opacity: 1;
}
.chat-preview-composer .button { min-width: 7rem; }
.chat-preview-composer .button:disabled { opacity: .52; }
.chat-preview-disabled-note {
  margin: var(--space-2) 0 0;
  color: var(--color-muted);
  font-size: var(--font-body-sm);
}
.chat-preview-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}
@media (max-width: 900px) {
  .chat-preview-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .chat-preview-workspace { min-height: 0; }
  .chat-preview-grid { grid-template-columns: minmax(0, 1fr); }
  .chat-preview-prompt { min-height: 0; }
  .chat-preview-composer-controls { align-items: stretch; flex-direction: column; }
  .chat-preview-composer .button { width: 100%; }
  .chat-preview-actions { align-items: stretch; flex-direction: column; }
  .chat-preview-actions .button { width: 100%; }
}