/* ==========================================================================
   YTRecap — design tokens
   ========================================================================== */
:root {
  color-scheme: light;
  --bg: #fbfaf8;
  --surface: #ffffff;
  --surface-2: #f4f2ee;
  --surface-3: #ebe8e2;
  --border: rgba(24, 20, 14, 0.08);
  --border-strong: rgba(24, 20, 14, 0.14);
  --text: #17150f;
  --text-2: #4a463e;
  --muted: #7a756b;
  --accent: #e5362b;
  --accent-hover: #cf2c22;
  --accent-soft: rgba(229, 54, 43, 0.08);
  --accent-line: rgba(229, 54, 43, 0.22);
  --on-accent: #ffffff;
  --success: #1f8a4c;
  --shadow-sm: 0 1px 2px rgba(24, 20, 14, 0.05);
  --shadow-md: 0 1px 2px rgba(24, 20, 14, 0.04), 0 8px 24px -8px rgba(24, 20, 14, 0.1);
  --shadow-lg: 0 2px 4px rgba(24, 20, 14, 0.03), 0 24px 48px -16px rgba(24, 20, 14, 0.16);
  --glow: rgba(229, 54, 43, 0.12);
  --grid-dot: rgba(24, 20, 14, 0.07);

  --font-sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Instrument Serif", ui-serif, Georgia, serif;
  --font-mono: "Geist Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 20px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #0b0b0c;
    --surface: #141416;
    --surface-2: #1b1b1e;
    --surface-3: #242428;
    --border: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.13);
    --text: #eeece8;
    --text-2: #c3bfb8;
    --muted: #8d8982;
    --accent: #ff5247;
    --accent-hover: #ff6a60;
    --accent-soft: rgba(255, 82, 71, 0.1);
    --accent-line: rgba(255, 82, 71, 0.3);
    --success: #4cc27f;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -8px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.3), 0 24px 48px -16px rgba(0, 0, 0, 0.6);
    --glow: rgba(255, 82, 71, 0.13);
    --grid-dot: rgba(255, 255, 255, 0.06);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0b0b0c;
  --surface: #141416;
  --surface-2: #1b1b1e;
  --surface-3: #242428;
  --border: rgba(255, 255, 255, 0.07);
  --border-strong: rgba(255, 255, 255, 0.13);
  --text: #eeece8;
  --text-2: #c3bfb8;
  --muted: #8d8982;
  --accent: #ff5247;
  --accent-hover: #ff6a60;
  --accent-soft: rgba(255, 82, 71, 0.1);
  --accent-line: rgba(255, 82, 71, 0.3);
  --success: #4cc27f;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px -8px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.3), 0 24px 48px -16px rgba(0, 0, 0, 0.6);
  --glow: rgba(255, 82, 71, 0.13);
  --grid-dot: rgba(255, 255, 255, 0.06);
}

/* ==========================================================================
   Base
   ========================================================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

svg {
  width: 18px;
  height: 18px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

::selection {
  background: var(--accent-soft);
  color: var(--text);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

[hidden] {
  display: none !important;
}

:root:not([data-theme="dark"]) .only-dark,
:root[data-theme="dark"] .only-light {
  display: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .only-dark {
    display: block;
  }
  :root:not([data-theme]) .only-light {
    display: none;
  }
}

/* Soft accent glow + dotted grid behind the hero */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 40% at 50% -5%, var(--glow), transparent 70%),
    radial-gradient(var(--grid-dot) 1px, transparent 1px) 0 0 / 22px 22px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 35%, transparent 75%);
  mask-image: linear-gradient(to bottom, #000 0%, #000 35%, transparent 75%);
}

/* ==========================================================================
   Top bar
   ========================================================================== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px clamp(16px, 4vw, 32px);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease);
  animation: fade-down 0.8s var(--ease-out) both;
}

.topbar.scrolled {
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  backdrop-filter: saturate(1.6) blur(14px);
  border-bottom-color: var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.02em;
  text-decoration: none;
  border-radius: 10px;
}

.brand:focus-visible {
  outline-offset: 4px;
}

.brand img {
  display: block;
  border-radius: 8px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.demo-pill {
  margin-right: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px dashed var(--border-strong);
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.icon-btn {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--text-2);
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}

.icon-btn:hover {
  background: var(--surface-2);
  color: var(--text);
}

.icon-btn:active {
  transform: scale(0.96);
}

.icon-btn[data-tip]:hover::after {
  content: attr(data-tip);
  position: absolute;
  top: calc(100% + 6px);
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--text);
  color: var(--bg);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  pointer-events: none;
  animation: fade-in 0.15s var(--ease);
}

/* ==========================================================================
   Layout
   ========================================================================== */
.shell {
  flex: 1;
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 32px);
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(56px, 15vh, 160px) 0 36px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  padding: 5px 12px 5px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.hero h1 {
  margin: 0;
  font-size: clamp(40px, 7.2vw, 72px);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.hero h1 em {
  font-family: var(--font-serif);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.lede {
  max-width: 520px;
  margin: 20px auto 0;
  color: var(--muted);
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.6;
  text-wrap: pretty;
}

/* ==========================================================================
   Composer
   ========================================================================== */
.composer {
  max-width: 680px;
  margin: 0 auto;
}

.composer-field {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 7px 7px 16px;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.composer-field:focus-within {
  border-color: var(--accent-line);
  box-shadow: var(--shadow-lg), 0 0 0 4px var(--accent-soft);
}

.composer.invalid .composer-field {
  border-color: var(--accent);
  animation: shake 0.35s;
}

.yt-glyph {
  width: 24px;
  height: 24px;
  color: var(--accent);
  stroke: none;
}

.composer input {
  flex: 1;
  min-width: 0;
  height: 44px;
  padding: 0 4px;
  border: 0;
  outline: 0;
  background: transparent;
  font-size: 16px;
}

.composer input::placeholder {
  color: var(--muted);
}

.primary-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 18px;
  border: 0;
  border-radius: 11px;
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 500;
  white-space: nowrap;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18), 0 1px 2px rgba(0, 0, 0, 0.12);
  transition: background-color 0.15s, transform 0.15s;
}

.primary-btn:hover {
  background: var(--accent-hover);
}

.primary-btn:hover svg {
  transform: translateX(2px);
}

.primary-btn svg {
  width: 16px;
  height: 16px;
  stroke-width: 2.2;
  transition: transform 0.2s var(--ease);
}

.primary-btn:active {
  transform: scale(0.98);
}

.primary-btn[disabled] {
  opacity: 0.7;
  cursor: progress;
}

.ghost-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  transition: background-color 0.15s, color 0.15s;
}

.ghost-btn:hover {
  background: var(--surface-2);
  color: var(--text);
}

.ghost-btn svg {
  width: 16px;
  height: 16px;
}

.composer-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
  padding: 0 4px;
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.hint b {
  font-weight: 500;
  color: var(--text-2);
}

kbd {
  display: inline-grid;
  place-items: center;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border: 1px solid var(--border-strong);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 11px;
}

.form-error {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 12px 4px 0;
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
}

/* Segmented control */
.segmented {
  position: relative;
  display: inline-flex;
  padding: 3px;
  border-radius: 11px;
  background: var(--surface-2);
  border: 1px solid var(--border);
}

.segmented button {
  position: relative;
  z-index: 1;
  height: 30px;
  padding: 0 14px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  transition: color 0.2s;
}

.segmented button:hover {
  color: var(--text);
}

.segmented button[aria-checked="true"] {
  color: var(--text);
  background: var(--surface);
  box-shadow: var(--shadow-sm), 0 0 0 1px var(--border);
}

.segmented-sm button {
  height: 28px;
  padding: 0 12px;
}

/* ==========================================================================
   Recent (idle state)
   ========================================================================== */
.section-label {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.recent {
  max-width: 680px;
  margin: 44px auto 0;
  animation: rise 0.7s 0.16s var(--ease) both;
}

.recent-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}

.recent-item {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  text-align: left;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s, transform 0.15s var(--ease), box-shadow 0.15s;
}

.recent-item:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.recent-item img {
  width: 64px;
  aspect-ratio: 16 / 9;
  flex: none;
  border-radius: 6px;
  object-fit: cover;
  background: var(--surface-3);
}

.recent-item span {
  min-width: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.35;
}

/* ==========================================================================
   Result state
   ========================================================================== */
body.has-result .hero,
body.has-result .recent {
  display: none;
}

body.has-result .composer {
  margin-top: 28px;
  animation: none;
}

body.has-result .composer-field {
  box-shadow: var(--shadow-md);
}

body.has-result .composer-meta {
  display: none;
}

.result {
  display: grid;
  grid-template-columns: minmax(0, 360px) minmax(0, 1fr);
  align-items: start;
  gap: 24px;
  margin: 28px 0 64px;
  animation: rise 0.5s var(--ease) both;
}

.video-card,
.summary-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.video-card {
  position: sticky;
  top: 84px;
  overflow: hidden;
}

.player {
  position: relative;
  aspect-ratio: 16 / 9;
  background:
    radial-gradient(circle at 30% 20%, var(--accent-soft), transparent 60%),
    var(--surface-3);
  overflow: hidden;
}

.player img,
.player iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  object-fit: cover;
}

.player img {
  transition: transform 0.6s var(--ease), opacity 0.3s;
}

.player:hover img {
  transform: scale(1.03);
}

.player img:not([src]),
.player img.broken {
  opacity: 0;
}

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  place-items: center;
  width: 60px;
  height: 60px;
  border: 0;
  border-radius: 50%;
  background: rgba(10, 10, 10, 0.55);
  color: #fff;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transform: translate(-50%, -50%);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s var(--ease), background-color 0.2s;
}

.play-btn svg {
  width: 24px;
  height: 24px;
  margin-left: 3px;
}

.player:hover .play-btn {
  background: var(--accent);
  transform: translate(-50%, -50%) scale(1.06);
}

.video-body {
  padding: 18px 20px 20px;
}

.video-title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.015em;
  text-wrap: pretty;
}

.video-channel {
  margin: 6px 0 0;
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
}

.video-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.video-stats:empty {
  display: none;
}

.stat {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-2);
  font-size: 12px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.video-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.source-badge {
  display: inline-flex;
  white-space: nowrap;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.source-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

.source-badge.warn::before {
  background: #d99a1e;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.text-link:hover {
  color: var(--accent);
}

.text-link svg {
  width: 14px;
  height: 14px;
}

/* Summary card */
.summary-card {
  min-height: 420px;
  padding: 0 0 8px;
}

.summary-head {
  position: sticky;
  top: 65px;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px 12px 16px;
  border-bottom: 1px solid var(--border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  background: var(--surface);
}

.summary-actions {
  display: flex;
  gap: 2px;
}

.summary-actions .icon-btn[disabled] {
  opacity: 0.35;
  pointer-events: none;
}

.icon-btn.done {
  color: var(--success);
}

/* Progress steps (shown until the first token arrives) */
.progress {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 32px clamp(20px, 4vw, 40px) 8px;
  list-style: none;
}

.progress li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 14px;
  transition: color 0.3s;
}

.progress li::before {
  content: "";
  width: 18px;
  height: 18px;
  flex: none;
  border-radius: 50%;
  border: 1.5px solid var(--border-strong);
  box-sizing: border-box;
}

.progress li.active {
  color: var(--text);
  font-weight: 500;
}

.progress li.active::before {
  border-color: var(--accent);
  border-top-color: transparent;
  animation: spin 0.8s linear infinite;
}

.progress li.complete {
  color: var(--text-2);
}

.progress li.complete::before {
  border: 0;
  background: var(--success)
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E")
    center / 12px no-repeat;
}

/* Rendered summary */
.summary {
  padding: 8px clamp(20px, 4vw, 40px) 24px;
  color: var(--text-2);
  font-size: 15.5px;
  line-height: 1.7;
}

.summary:empty {
  display: none;
}

.summary section {
  animation: fade-up 0.4s var(--ease) both;
}

.summary section + section {
  margin-top: 8px;
}

.summary h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 28px 0 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.summary h3::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.summary p {
  margin: 0 0 14px;
  text-wrap: pretty;
}

.summary strong {
  color: var(--text);
  font-weight: 600;
}

.summary ul,
.summary ol {
  margin: 0 0 14px;
  padding-left: 20px;
}

.summary code {
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 0.88em;
}

/* TL;DR callout */
.sec-tldr {
  margin-top: 24px;
  padding: 20px 22px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
}

.sec-tldr h3 {
  margin: 0 0 8px;
  color: var(--accent);
}

.sec-tldr h3::after {
  display: none;
}

.sec-tldr p {
  margin: 0;
  color: var(--text);
  font-family: var(--font-serif);
  font-size: 22px;
  line-height: 1.4;
  letter-spacing: -0.005em;
}

/* Key takeaways */
.sec-takeaways ul {
  display: grid;
  gap: 10px;
  padding: 0;
  list-style: none;
  counter-reset: takeaway;
}

.sec-takeaways li {
  position: relative;
  padding: 12px 14px 12px 50px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  counter-increment: takeaway;
  line-height: 1.55;
}

.sec-takeaways li::before {
  content: counter(takeaway, decimal-leading-zero);
  position: absolute;
  top: 12px;
  left: 14px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  line-height: 25px;
}

/* Chapters timeline */
.sec-chapters ul {
  position: relative;
  padding: 0;
  list-style: none;
}

.sec-chapters li {
  position: relative;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 14px;
  padding: 10px 0;
}

.sec-chapters li + li {
  border-top: 1px dashed var(--border);
}

.ts {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  height: 26px;
  padding: 0 8px;
  border: 1px solid var(--border-strong);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}

.ts:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.sec-chapters .ts {
  align-self: start;
  justify-self: start;
  margin-top: 1px;
}

.chapter-body strong {
  display: block;
  line-height: 1.4;
  margin-bottom: 2px;
}

.chapter-body span {
  color: var(--muted);
  font-size: 14.5px;
}

/* Streaming caret */
.summary.streaming > section:last-child > :last-child::after {
  content: "";
  display: inline-block;
  width: 7px;
  height: 1.05em;
  margin-left: 3px;
  vertical-align: -2px;
  border-radius: 2px;
  background: var(--accent);
  animation: blink 1s steps(2) infinite;
}

.summary.streaming .sec-takeaways > ul:last-child > li:last-child::after,
.summary.streaming .sec-chapters > ul:last-child > li:last-child::after {
  display: none;
}

/* Skeleton */
.skeleton {
  display: block;
  height: 0.9em;
  margin: 6px 0;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--surface-2) 0%, var(--surface-3) 50%, var(--surface-2) 100%) 0 0 / 200% 100%;
  animation: shimmer 1.4s linear infinite;
}

/* Error panel */
.error-panel {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  margin: 24px clamp(20px, 4vw, 40px);
  padding: 16px 18px;
  border: 1px solid var(--accent-line);
  border-radius: var(--radius);
  background: var(--accent-soft);
}

.error-panel > svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
}

.error-title {
  margin: 0;
  color: var(--text);
  font-weight: 600;
}

.error-msg {
  margin: 2px 0 0;
  color: var(--text-2);
  font-size: 14px;
}

/* ==========================================================================
   Footer + toast
   ========================================================================== */
.footer {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 28px 16px 36px;
  color: var(--muted);
  font-size: 13px;
}

.footer a {
  text-decoration: none;
  color: var(--text-2);
}

.footer a:hover {
  color: var(--accent);
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px 10px 12px;
  border-radius: 12px;
  background: var(--text);
  color: var(--bg);
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translate(-50%, 12px);
  pointer-events: none;
  transition: opacity 0.2s, transform 0.25s var(--ease);
}

.toast svg {
  color: var(--success);
  stroke-width: 2.4;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ==========================================================================
   Motion
   ========================================================================== */
@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes shimmer {
  to {
    background-position: -200% 0;
  }
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

@keyframes shake {
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
  .result {
    grid-template-columns: 1fr;
  }

  .video-card {
    position: static;
    display: grid;
    grid-template-columns: minmax(0, 240px) 1fr;
  }

  .player {
    height: 100%;
    min-height: 135px;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 40px;
    padding-bottom: 28px;
  }

  .composer-field {
    flex-wrap: wrap;
    padding: 6px;
  }

  .yt-glyph {
    margin-left: 10px;
  }

  .composer input {
    flex-basis: calc(100% - 50px);
  }

  .paste-btn {
    display: none;
  }

  .primary-btn {
    width: 100%;
    justify-content: center;
  }

  .composer-meta {
    justify-content: center;
  }

  body.has-result .composer-field {
    flex-wrap: nowrap;
  }

  body.has-result .composer input {
    flex-basis: auto;
  }

  body.has-result .primary-btn {
    width: 44px;
    padding: 0;
    justify-content: center;
  }

  body.has-result .primary-btn span {
    display: none;
  }

  .hint {
    display: none;
  }

  .video-card {
    grid-template-columns: 1fr;
  }

  .summary-head {
    top: 61px;
    padding: 10px;
  }

  .segmented-sm button {
    padding: 0 9px;
  }

  .sec-tldr p {
    font-size: 19px;
  }

  .sec-chapters li {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .error-panel {
    grid-template-columns: auto 1fr;
  }

  .error-panel .ghost-btn {
    grid-column: 1 / -1;
    justify-self: start;
  }
}

/* ==========================================================================
   Polish: examples, loading button, skeleton, summary footer
   ========================================================================== */
.examples {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  max-width: 680px;
  margin: 28px auto 0;
}

.examples-label {
  margin-right: 4px;
  color: var(--muted);
  font-size: 13px;
}

.chip {
  height: 32px;
  padding: 0 14px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  transition: border-color 0.15s, color 0.15s, background-color 0.15s, transform 0.15s var(--ease);
}

.chip:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--text);
  transform: translateY(-1px);
}

body.has-result .examples {
  display: none;
}

.recent-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.text-btn {
  padding: 0;
  border: 0;
  background: none;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.text-btn:hover {
  color: var(--accent);
}

.recent-item img {
  background:
    radial-gradient(circle at 30% 20%, var(--accent-soft), transparent 60%),
    var(--surface-3);
}

/* Submit button loading state */
.primary-btn {
  position: relative;
}

.btn-spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.primary-btn.loading svg {
  display: none;
}

.primary-btn.loading .btn-spinner {
  display: inline-block;
}

/* Skeleton shown under the progress steps */
.skeleton-block {
  padding: 18px clamp(20px, 4vw, 40px) 32px;
}

.skeleton-block .skeleton {
  height: 12px;
  margin: 12px 0;
}

.skeleton-block .skeleton:first-child {
  height: 10px;
  margin-bottom: 18px;
}

/* Footer under a finished summary */
.summary-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 16px;
  margin: 0 clamp(20px, 4vw, 40px) 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  animation: fade-in 0.4s var(--ease) both;
}

.foot-stats {
  flex: 1;
  margin: 0;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.foot-stats b {
  color: var(--accent);
  font-weight: 600;
}

.foot-note {
  flex-basis: 100%;
  order: 3;
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
}

.summary-foot .ghost-btn {
  height: 32px;
  font-size: 13px;
}

@media (max-width: 640px) {
  .examples-label {
    width: 100%;
    margin: 0;
    text-align: center;
  }

}

/* ==========================================================================
   Landing entrance
   ========================================================================== */
.backdrop {
  animation: backdrop-in 1.8s var(--ease-out) both;
}

.intro {
  animation: intro 1s var(--ease-out) both;
  animation-delay: var(--d, 0s);
}

.hero h1 .line {
  display: block;
}

.hero h1 .word {
  display: inline-block;
  animation: word-in 1.1s var(--ease-out) both;
  animation-delay: var(--d, 0s);
}

/* One-time shimmer across the accent line once it lands */
.hero h1 em .word {
  padding: 0 0.04em;
  margin: 0 -0.04em;
  background: linear-gradient(100deg, var(--accent) 42%, color-mix(in srgb, var(--accent) 45%, #fff) 50%, var(--accent) 58%) 100% 0 / 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation:
    word-in 1.1s var(--ease-out) both,
    sheen 1.6s ease-in-out both;
  animation-delay: var(--d, 0s), calc(var(--d, 0s) + 0.9s);
}

/* Soft glow ring once the composer has arrived, to draw the eye */
body:not(.has-result) .composer-field {
  animation: invite 1.6s 1.7s ease-out;
}

.eyebrow .dot {
  position: relative;
}

.eyebrow .dot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--accent);
  animation: ping 2.4s 1.2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

body.has-result .intro,
body.has-result .composer-field {
  animation: none;
}

@keyframes intro {
  from {
    opacity: 0;
    transform: translateY(18px);
    filter: blur(6px);
  }
}

@keyframes word-in {
  from {
    opacity: 0;
    transform: translateY(0.35em);
    filter: blur(12px);
  }
}

@keyframes sheen {
  from {
    background-position: 100% 0;
  }
  to {
    background-position: 0 0;
  }
}

@keyframes backdrop-in {
  from {
    opacity: 0;
    transform: scale(1.04);
  }
}

@keyframes fade-down {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
}

@keyframes invite {
  0% {
    box-shadow: var(--shadow-lg), 0 0 0 0 var(--accent-line);
  }
  100% {
    box-shadow: var(--shadow-lg), 0 0 0 14px transparent;
  }
}

@keyframes ping {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  70%,
  100% {
    transform: scale(3);
    opacity: 0;
  }
}