:root {
  color-scheme: light dark;
  accent-color: #2563eb;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --border: #e2e8f0;
  --border-hover: #94a3b8;
  --text: #0f172a;
  --text-muted: #475569;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #eff6ff;
  --success: #16a34a;
  --success-soft: #f0fdf4;
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0f19;
    --surface: #111827;
    --surface-alt: #1e293b;
    --border: #1f2937;
    --border-hover: #475569;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-soft: rgba(59, 130, 246, 0.14);
    --success: #22c55e;
    --success-soft: rgba(34, 197, 94, 0.14);
    --danger: #ef4444;
    --danger-soft: rgba(239, 68, 68, 0.14);
    --shadow: 0 4px 24px -2px rgba(0, 0, 0, 0.4);
  }
}

::selection {
  background-color: var(--primary);
  color: #ffffff;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Header & Navigation */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text);
  text-decoration: none;
  user-select: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-badge {
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.75rem;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  font-weight: 600;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background-color 0.15s, color 0.15s;
}

.nav-link:hover,
.nav-link[aria-current="page"] {
  background: var(--surface-alt);
  color: var(--text);
  text-decoration: none;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lang-select {
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  background-color: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.35rem 0.6rem;
  cursor: pointer;
}

/* Main Container */
.container {
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.25rem 3.5rem;
  flex: 1;
}

/* Hero Section */
.hero {
  text-align: center;
  margin-bottom: 1.75rem;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
  user-select: none;
}

.hero h1 {
  font-size: clamp(1.65rem, 3.8vw, 2.35rem);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.65rem;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 640px;
  margin: 0 auto;
}

/* Uploader Card */
.workspace-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1.5rem;
}

.dropzone {
  border: 2px dashed var(--border-hover);
  border-radius: var(--radius);
  background: var(--surface-alt);
  padding: 2.25rem 1.25rem;
  text-align: center;
  transition: border-color 0.2s, background-color 0.2s;
  cursor: pointer;
  position: relative;
}

.dropzone:hover,
.dropzone.drag-over {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.dropzone-icon {
  font-size: 2.25rem;
  margin-bottom: 0.5rem;
  user-select: none;
}

.dropzone-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.dropzone-hint {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.file-input {
  font-size: 0.875rem;
  color: var(--text-muted);
  max-width: 100%;
}

.file-input::file-selector-button {
  font-family: inherit;
  font-weight: 600;
  font-size: 0.875rem;
  color: #ffffff;
  background-color: var(--primary);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  margin-right: 0.75rem;
  cursor: pointer;
  transition: background-color 0.15s;
}

.file-input::file-selector-button:hover {
  background-color: var(--primary-hover);
}

/* Quick Actions Row */
.quick-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.15rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--border);
}

.quick-buttons {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.15s, border-color 0.15s, opacity 0.15s;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: var(--surface-alt);
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--border-hover);
}

.btn-danger {
  background-color: var(--danger-soft);
  color: var(--danger);
  border-color: var(--danger);
}

.btn-sm {
  font-size: 0.8rem;
  padding: 0.35rem 0.7rem;
}

.options-inline {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.options-inline label {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

/* Selected Audio Preview & Status */
.audio-bar {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  background: var(--surface-alt);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.audio-meta {
  font-size: 0.9rem;
  font-weight: 600;
  word-break: break-all;
}

.audio-player {
  height: 36px;
  max-width: 280px;
  width: 100%;
}

.status-banner {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.status-banner[data-state="loading"] {
  background: var(--primary-soft);
  color: var(--primary);
}

.status-banner[data-state="error"] {
  background: var(--danger-soft);
  color: var(--danger);
}

.status-banner[data-state="success"] {
  background: var(--success-soft);
  color: var(--success);
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2.5px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  flex-shrink: 0;
}

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

/* Results Section (3 Blocks) */
.results-section {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.results-toolbar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  box-shadow: var(--shadow);
}

.results-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.export-actions {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
}

.result-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--border);
}

.result-card-header h2 {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.summary-list {
  padding-left: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.action-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.action-item-label {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
  cursor: pointer;
  transition: opacity 0.15s, background-color 0.15s;
}

.action-item-label input[type="checkbox"] {
  margin-top: 0.3rem;
  width: 1rem;
  height: 1rem;
  cursor: pointer;
}

.action-item-label:has(:checked) {
  opacity: 0.6;
  text-decoration: line-through;
}

.owner-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  background: var(--primary-soft);
  color: var(--primary);
  margin-left: auto;
  white-space: nowrap;
  user-select: none;
}

/* Transcript Segments */
.transcript-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 480px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-hover) var(--surface-alt);
  padding-right: 0.35rem;
}

.segment-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--surface-alt);
}

.segment-meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 92px;
  user-select: none;
}

.time-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  text-align: left;
  width: fit-content;
}

.time-badge:hover {
  text-decoration: underline;
}

.speaker-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.segment-text {
  font-size: 0.95rem;
}

/* Lead Magnet & Extra Cards */
.lead-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  margin-top: 1.5rem;
}

.lead-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}

.lead-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.9rem;
}

.subscribe-form {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.text-input {
  flex: 1;
  min-width: 220px;
  font-family: inherit;
  font-size: 0.92rem;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-alt);
  color: var(--text);
}

input:not(input[type="range"]):user-valid {
  border-color: var(--success);
}

input:not(input[type="range"]):user-invalid {
  border-color: var(--danger);
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* Feature / SEO Grid on Scenario Pages */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.feature-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem;
}

.feature-box h3 {
  font-size: 0.98rem;
  margin-bottom: 0.35rem;
}

.feature-box p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.code-block {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
  overflow-x: auto;
  white-space: pre;
  line-height: 1.45;
  margin-top: 0.75rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 1.25rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.4rem;
}

[hidden] {
  display: none !important;
}

@media (max-width: 600px) {
  .segment-row {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  .segment-meta {
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
  }
}