:root {
  --bg-main: #0a0b10;
  --bg-card: #12141e;
  --bg-card-hover: #181b28;
  --bg-elevated: #1a1e2d;
  --border: rgba(255, 255, 255, 0.08);
  --border-focus: #3b82f6;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-sub: #6b7280;
  --accent: #3b82f6;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --accent-amber: #f59e0b;
  --accent-amber-glow: rgba(245, 158, 11, 0.12);
  --accent-red: #ef4444;
  --accent-red-glow: rgba(239, 68, 68, 0.12);
  --accent-green: #10b981;
  --accent-purple: #8b5cf6;
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  text-decoration: underline;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  border-bottom: 1px solid var(--border);
  background: rgba(10, 11, 16, 0.9);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 14px 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-badge {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  font-weight: 900;
  font-size: 13px;
  padding: 5px 10px;
  border-radius: 6px;
  letter-spacing: 1px;
}

.brand-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.2px;
}

.brand-sub {
  font-size: 12px;
  color: var(--text-muted);
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn-pill {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-pill:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-pill.primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-pill.primary:hover {
  background: #2563eb;
}

.btn-pill.download {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.btn-pill.download:hover {
  background: rgba(16, 185, 129, 0.25);
}

/* At-A-Glance Intel Bar */
.intel-bar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin: 24px 0 32px;
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 24px;
  align-items: center;
}

@media (max-width: 900px) {
  .intel-bar {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

.stat-pill {
  display: flex;
  flex-direction: column;
  padding-right: 20px;
  border-right: 1px solid var(--border);
}

@media (max-width: 900px) {
  .stat-pill {
    border-right: none;
    padding-right: 0;
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
  }
}

.stat-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-sub);
  letter-spacing: 0.5px;
}

.stat-num {
  font-size: 26px;
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.1;
}

.stat-tag {
  font-size: 12px;
  color: var(--accent-amber);
  font-weight: 600;
}

.reminders-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.reminder-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 13px;
  line-height: 1.4;
}

.reminder-chip {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.reminder-chip.all { background: rgba(239, 68, 68, 0.2); color: #f87171; }
.reminder-chip.ecom { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.reminder-chip.info { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.reminder-chip.app { background: rgba(139, 92, 246, 0.2); color: #c084fc; }

/* Hero Section */
.hero {
  padding: 16px 0 24px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-amber-glow);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: #fbbf24;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}

.hero h1 {
  font-size: 42px;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 10px;
  letter-spacing: -1px;
}

.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 820px;
  line-height: 1.5;
  margin-bottom: 20px;
}

.downloads-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0 24px;
}

/* Nav Tabs */
.tabs-bar {
  display: flex;
  gap: 6px;
  border-bottom: 1px solid var(--border);
  margin-top: 16px;
  overflow-x: auto;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 700;
  padding: 12px 18px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  white-space: nowrap;
}

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

.tab-btn.active {
  color: #fbbf24;
  border-bottom-color: #fbbf24;
}

/* Tab Panels */
.tab-content {
  display: none;
  padding: 28px 0 64px;
}

.tab-content.active {
  display: block;
}

/* Replay Grid Layout */
.replay-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
}

@media (max-width: 960px) {
  .replay-grid {
    grid-template-columns: 1fr;
  }
}

.player-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  background: #000;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.player-details {
  padding: 18px;
}

.player-status-badge {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-amber);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.player-title {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 12px;
}

.player-actions {
  display: flex;
  gap: 12px;
}

/* Chapter Sidebar */
.chapters-sidebar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  height: 600px;
}

.sidebar-header {
  margin-bottom: 12px;
}

.search-box {
  width: 100%;
  background: var(--bg-main);
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s;
  margin-bottom: 10px;
}

.search-box:focus {
  border-color: var(--border-focus);
}

.filter-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.chip {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.chip:hover, .chip.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.chapters-count {
  font-size: 12px;
  color: var(--text-sub);
  margin-bottom: 8px;
}

.chapters-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-right: 4px;
}

.chapter-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 10px;
  background: var(--bg-elevated);
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  transition: all 0.2s;
  width: 100%;
}

.chapter-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border);
}

.chapter-item.active {
  background: var(--accent-glow);
  border-color: var(--accent);
}

.chapter-time {
  font-family: monospace;
  font-size: 11px;
  font-weight: 700;
  color: #60a5fa;
  background: rgba(59, 130, 246, 0.12);
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

.chapter-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.35;
}

/* Visual Comparison Cards */
.visual-card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 20px 0;
}

@media (max-width: 768px) {
  .visual-card-grid {
    grid-template-columns: 1fr;
  }
}

.visual-box {
  border-radius: 8px;
  padding: 16px 20px;
  border: 1px solid var(--border);
}

.visual-box.winner {
  background: rgba(16, 185, 129, 0.08);
  border-color: rgba(16, 185, 129, 0.3);
}

.visual-box.loser {
  background: rgba(239, 68, 68, 0.08);
  border-color: rgba(239, 68, 68, 0.3);
}

.visual-box-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.visual-box.winner .visual-box-header { color: #34d399; }
.visual-box.loser .visual-box-header { color: #f87171; }

.visual-box ul {
  list-style: none;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* Warnings */
.callout-warning {
  background: var(--accent-amber-glow);
  border-left: 4px solid var(--accent-amber);
  padding: 14px 18px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
  font-size: 14px;
  font-weight: 600;
  color: #fde68a;
  line-height: 1.4;
}

.callout-danger {
  background: var(--accent-red-glow);
  border-left: 4px solid var(--accent-red);
  padding: 14px 18px;
  border-radius: 0 8px 8px 0;
  margin: 16px 0;
  font-size: 14px;
  font-weight: 600;
  color: #fca5a5;
  line-height: 1.4;
}

/* Playbooks Layout */
.playbooks-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.playbook-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
}

.playbook-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  gap: 16px;
}

.playbook-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 6px;
}

.playbook-badge.funnels { background: rgba(59, 130, 246, 0.2); color: #60a5fa; }
.playbook-badge.creative { background: rgba(245, 158, 11, 0.2); color: #fbbf24; }
.playbook-badge.testing { background: rgba(139, 92, 246, 0.2); color: #a78bfa; }

.playbook-title {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 4px;
}

.playbook-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 16px 0;
}

.playbook-bullets li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.45;
}

.playbook-bullet-dot {
  color: var(--accent-amber);
  font-weight: 900;
  font-size: 16px;
  line-height: 1;
}

.checklist {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--bg-main);
  padding: 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  margin-top: 14px;
}

.checklist-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  cursor: pointer;
}

.checklist-item input {
  accent-color: var(--accent-amber);
  width: 16px;
  height: 16px;
}

/* 1:1 Key Items Layout */
.recap-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.recap-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border);
  padding-bottom: 18px;
  margin-bottom: 20px;
}

.recap-h2 {
  font-size: 22px;
  font-weight: 800;
}

.recap-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 28px;
}

.recap-table th, .recap-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
}

.recap-table th {
  background: var(--bg-elevated);
  color: var(--text-muted);
  font-weight: 700;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-p0 {
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 800;
  font-size: 11px;
}

.badge-p1 {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 800;
  font-size: 11px;
}

.badge-p2 {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 800;
  font-size: 11px;
}

.prompt-card {
  background: var(--bg-main);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin: 14px 0;
  position: relative;
}

.prompt-pre {
  font-family: monospace;
  font-size: 12px;
  color: #e5e7eb;
  white-space: pre-wrap;
  word-break: break-word;
}

.copy-btn {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 11px;
  cursor: pointer;
  transition: all 0.2s;
}

.copy-btn:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

/* AI Architecture */
.ai-architecture {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 800px) {
  .ai-architecture {
    grid-template-columns: 1fr;
  }
}

.ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.ai-card h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  color: var(--text-sub);
  font-size: 12px;
  text-align: center;
}

/* Interaction and narrow-screen fixes. */
button { font-family: inherit; }
:focus-visible { outline: 2px solid #93c5fd; outline-offset: 3px; }
#player-card { scroll-margin-top: 100px; }
.replay-grid > *, .ai-architecture > *, .intel-bar > * { min-width: 0; }
.prompt-card .copy-btn { position: static; display: block; margin: 0 0 12px auto; }
.concept-note { color: var(--text-muted); margin-bottom: 20px; }
@media(max-width:700px) {
 .header-inner, .playbook-header, .recap-top { flex-direction: column; align-items: flex-start; gap: 16px; }
 .header-actions { flex-wrap: wrap; gap: 8px; }
 header { position: static; }
 .container { padding: 0 16px; }
 .playbook-card, .recap-container, .ai-card { padding: 20px; }
 .recap-table { display: block; overflow-x: auto; }
 .recap-table th, .recap-table td { min-width: 120px; }
 .player-actions .btn-pill { white-space: normal; }
}