/* ═══════════════════════════════════════════════════════════════
   Claude Code Engineering — Dark Tech Presentation
   ═══════════════════════════════════════════════════════════════ */

:root {
  /* Palette */
  --bg-0: #05070d;
  --bg-1: #0a0e1a;
  --bg-2: #111728;
  --bg-3: #1a2238;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);

  --text-0: #f4f6fb;
  --text-1: #c4cbdb;
  --text-2: #8a93a8;
  --text-3: #5c6477;

  /* Accent — Claude orange + cyan/violet tech */
  --accent: #ff8c42;
  --accent-glow: rgba(255, 140, 66, 0.35);
  --cyan: #38e4ff;
  --cyan-glow: rgba(56, 228, 255, 0.25);
  --violet: #a78bfa;
  --green: #34d399;
  --red: #f87171;
  --amber: #fbbf24;

  --opus-color: #a78bfa;
  --sonnet-color: #38e4ff;

  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;

  --font-sans: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', monospace;
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--text-0);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
  letter-spacing: -0.01em;
  position: relative;
}

/* Ambient background glow */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 0%, rgba(255, 140, 66, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(56, 228, 255, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ═══════════════════════ Top Header ═══════════════════════ */

.top-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: clamp(56px, 6vh, 68px);
  padding: 0 clamp(14px, 2.4vw, 32px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: rgba(5, 7, 13, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex-shrink: 1;
}

.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.brand-title {
  font-weight: 700;
  font-size: clamp(13px, 1.1vw, 15px);
  letter-spacing: 0;
  white-space: nowrap;
}

.brand-sub {
  font-size: clamp(11px, 0.9vw, 12px);
  color: var(--text-2);
  padding-left: 10px;
  margin-left: 4px;
  border-left: 1px solid var(--border);
  white-space: nowrap;
}

.tab-nav {
  display: flex;
  gap: 6px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  padding: 4px;
  border-radius: 10px;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: clamp(6px, 0.8vw, 8px) clamp(10px, 1.4vw, 16px);
  background: transparent;
  border: none;
  color: var(--text-2);
  font-family: var(--font-sans);
  font-size: clamp(12px, 1vw, 13px);
  font-weight: 500;
  cursor: pointer;
  border-radius: 7px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-1);
  background: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
  background: var(--accent);
  color: #1a0f08;
  box-shadow: 0 0 20px var(--accent-glow);
}

.tab-btn.active .tab-index {
  color: rgba(26, 15, 8, 0.6);
}

.tab-index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-3);
  font-weight: 600;
}

.tab-label {
  font-weight: 600;
}

/* ═══════════════════════ Deck Area ═══════════════════════ */

.deck-area {
  position: fixed;
  top: clamp(56px, 6vh, 68px);
  left: 0;
  right: 0;
  bottom: clamp(60px, 7vh, 76px);
  overflow: hidden;
  z-index: 1;
}

.deck {
  display: none;
  height: 100%;
  position: relative;
}

.deck.active {
  display: block;
}

.slide {
  position: absolute;
  inset: 0;
  padding: clamp(24px, 3.2vw, 64px) clamp(24px, 4.4vw, 96px);
  display: none;
  flex-direction: column;
  overflow-y: auto;
  animation: slideIn 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.slide.active {
  display: flex;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Scrollbar */
.slide::-webkit-scrollbar { width: 8px; }
.slide::-webkit-scrollbar-track { background: transparent; }
.slide::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
.slide::-webkit-scrollbar-thumb:hover { background: var(--border-strong); }

/* ═══════════════════════ Slide Common ═══════════════════════ */

.slide-head {
  margin-bottom: clamp(16px, 2.4vw, 32px);
  padding-bottom: clamp(12px, 1.6vw, 20px);
  border-bottom: 1px solid var(--border);
}

.slide-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(11px, 0.95vw, 13px);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--accent);
  padding: 5px 12px;
  background: rgba(255, 140, 66, 0.1);
  border-radius: 4px;
  margin-bottom: 12px;
}

.slide-head h2 {
  font-size: clamp(26px, 3vw, 44px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 8px;
}

.slide-sub {
  font-size: clamp(15px, 1.3vw, 20px);
  color: var(--text-2);
}

.accent {
  color: var(--accent);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--cyan);
  border: 1px solid var(--border);
}

pre {
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.05vw, 15px);
  line-height: 1.7;
  color: var(--text-1);
  white-space: pre;
  overflow-x: auto;
}

pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: inherit;
}

/* ═══════════════════════ Cover Slide ═══════════════════════ */

.cover-slide {
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: clamp(24px, 4vw, 60px);
}

.cover-inner {
  max-width: min(1200px, 92vw);
}

.cover-badge {
  display: inline-block;
  padding: 8px 18px;
  border: 1px solid var(--accent);
  color: var(--accent);
  border-radius: 100px;
  font-size: clamp(12px, 1vw, 14px);
  font-weight: 600;
  letter-spacing: 0.1em;
  margin-bottom: clamp(20px, 2.8vw, 44px);
  background: rgba(255, 140, 66, 0.08);
}

.cover-title {
  font-size: clamp(36px, 5.6vw, 84px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: clamp(18px, 2.2vw, 32px);
}

.cover-title .accent {
  background: linear-gradient(135deg, var(--accent) 0%, #ffb57a 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cover-desc {
  font-size: clamp(16px, 1.6vw, 26px);
  color: var(--text-1);
  line-height: 1.6;
  margin-bottom: clamp(28px, 3.6vw, 56px);
}

.cover-meta {
  display: flex;
  justify-content: center;
  gap: clamp(10px, 1.6vw, 28px);
  flex-wrap: wrap;
}

.cover-meta > div {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: clamp(13px, 1.1vw, 16px);
  color: var(--text-1);
}

.cover-meta span {
  font-family: var(--font-mono);
  font-size: clamp(10px, 0.85vw, 12px);
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ═══════════════════════ End Slide ═══════════════════════ */

.end-slide {
  justify-content: center;
  align-items: center;
  text-align: center;
}

.end-inner {
  max-width: min(1000px, 88vw);
}

.end-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(11px, 0.95vw, 13px);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--accent);
  padding: 5px 12px;
  background: rgba(255, 140, 66, 0.1);
  border-radius: 4px;
  margin-bottom: 22px;
}

.end-slide h2 {
  font-size: clamp(30px, 4vw, 58px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: clamp(18px, 2.2vw, 28px);
}

.end-desc {
  font-size: clamp(15px, 1.4vw, 21px);
  color: var(--text-1);
  line-height: 1.75;
  margin-bottom: clamp(28px, 3.6vw, 48px);
}

.end-desc b {
  color: var(--accent);
}

.view-raw-btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: clamp(14px, 1.4vw, 20px) clamp(22px, 2.2vw, 36px);
  background: linear-gradient(135deg, var(--accent) 0%, #ff7a28 100%);
  color: #1a0f08;
  border: none;
  border-radius: 12px;
  font-size: clamp(14px, 1.15vw, 17px);
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 8px 32px var(--accent-glow);
  font-family: var(--font-sans);
}

.view-raw-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px var(--accent-glow);
}

.raw-icon {
  font-size: 20px;
}

.raw-file {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 4px 10px;
  background: rgba(26, 15, 8, 0.2);
  border-radius: 6px;
  font-weight: 600;
}

/* ═══════════════════════ Flow Chart (Tab1 S2) ═══════════════════════ */

.flow-chart {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 20px 0;
}

.flow-node {
  padding: clamp(12px, 1.3vw, 18px) clamp(18px, 2.2vw, 28px);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-weight: 600;
  font-size: clamp(13px, 1.1vw, 16px);
  min-width: min(240px, 90vw);
  text-align: center;
}

.flow-node.user {
  background: var(--bg-3);
  border-color: var(--cyan);
  color: var(--cyan);
  font-family: var(--font-mono);
}

.flow-node.router {
  border-color: rgba(255, 255, 255, 0.15);
}

.flow-node.agent {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: min(200px, 80vw);
  flex: 1 1 200px;
  max-width: 260px;
  padding: clamp(12px, 1.4vw, 16px) clamp(14px, 1.6vw, 20px);
}

.flow-node.agent b {
  font-size: clamp(15px, 1.25vw, 18px);
}

.flow-node.agent span {
  font-size: clamp(12px, 1vw, 14px);
  color: var(--text-2);
  font-weight: 400;
}

.flow-node.agent.opus {
  border-color: var(--opus-color);
  box-shadow: 0 0 0 1px rgba(167, 139, 250, 0.2), 0 0 24px rgba(167, 139, 250, 0.1);
}

.flow-node.agent.opus b {
  color: var(--opus-color);
}

.flow-node.agent.sonnet {
  border-color: var(--sonnet-color);
  box-shadow: 0 0 0 1px rgba(56, 228, 255, 0.2), 0 0 24px rgba(56, 228, 255, 0.1);
}

.flow-node.agent.sonnet b {
  color: var(--sonnet-color);
}

.flow-node.final {
  background: linear-gradient(135deg, rgba(255, 140, 66, 0.15) 0%, rgba(255, 140, 66, 0.05) 100%);
  border-color: var(--accent);
  color: var(--accent);
}

.flow-arrow {
  font-size: 20px;
  color: var(--text-3);
}

.flow-arrow.right {
  font-size: 24px;
}

.flow-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ═══════════════════════ Stack Grid (Tab1 S3) ═══════════════════════ */

.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: clamp(12px, 1.4vw, 20px);
  flex: 1;
  align-content: start;
}

.stack-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(16px, 1.8vw, 24px);
  transition: border-color 0.2s ease;
}

.stack-card:hover {
  border-color: var(--border-strong);
}

.stack-icon {
  font-size: clamp(28px, 2.4vw, 36px);
  margin-bottom: 12px;
}

.stack-card h3 {
  font-size: clamp(17px, 1.4vw, 22px);
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--accent);
}

.stack-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stack-card li {
  font-size: clamp(14px, 1.1vw, 17px);
  color: var(--text-1);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}

.stack-card li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--text-3);
}

/* ═══════════════════════ Two Column Layout ═══════════════════════ */

.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(20px, 2.8vw, 40px);
}

.two-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: var(--font-mono);
}

/* ═══════════════════════ Trigger List (Tab1 S4) ═══════════════════════ */

.trigger-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.trigger-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  flex-wrap: wrap;
}

.trigger-input {
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.1vw, 16px);
  color: var(--text-1);
  flex: 1;
}

.trigger-arrow {
  color: var(--text-3);
  font-size: clamp(16px, 1.4vw, 22px);
}

.trigger-flow {
  font-weight: 700;
  font-size: clamp(13px, 1.1vw, 16px);
  padding: 7px 14px;
  border-radius: 6px;
}

.trigger-flow.pickup {
  background: rgba(56, 228, 255, 0.12);
  color: var(--cyan);
  border: 1px solid rgba(56, 228, 255, 0.3);
}

.trigger-flow.finish {
  background: rgba(255, 140, 66, 0.12);
  color: var(--accent);
  border: 1px solid rgba(255, 140, 66, 0.3);
}

.pill-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pill-list li {
  padding: 14px 18px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: clamp(14px, 1.15vw, 17px);
  color: var(--text-1);
  line-height: 1.5;
}

/* ═══════════════════════ Agent Cards (Tab1 S5) ═══════════════════════ */

.agent-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: clamp(12px, 1.4vw, 20px);
  flex: 1;
  align-content: start;
}

.agent-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(16px, 1.8vw, 24px);
  display: flex;
  flex-direction: column;
}

.agent-card.planner { border-top: 3px solid var(--opus-color); }
.agent-card.implementer { border-top: 3px solid var(--sonnet-color); }
.agent-card.reviewer { border-top: 3px solid var(--opus-color); }

.agent-header {
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.agent-model {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(10px, 0.85vw, 12px);
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.agent-card.planner .agent-model,
.agent-card.reviewer .agent-model {
  background: rgba(167, 139, 250, 0.15);
  color: var(--opus-color);
}

.agent-card.implementer .agent-model {
  background: rgba(56, 228, 255, 0.15);
  color: var(--sonnet-color);
}

.agent-header h3 {
  font-size: clamp(20px, 1.7vw, 26px);
  font-weight: 800;
}

.agent-body p {
  font-size: clamp(12px, 0.95vw, 14px);
  font-weight: 700;
  color: var(--text-2);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.agent-body ul {
  list-style: none;
  margin-bottom: 16px;
}

.agent-body li {
  font-size: clamp(13px, 1.05vw, 16px);
  color: var(--text-1);
  padding: 5px 0 5px 14px;
  position: relative;
  line-height: 1.5;
}

.agent-body li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--text-3);
}

.tool-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.tool-tags span {
  font-family: var(--font-mono);
  font-size: clamp(11px, 0.9vw, 13px);
  padding: 4px 10px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-1);
}

.no-tools {
  font-size: clamp(12px, 0.95vw, 14px) !important;
  color: var(--red) !important;
  font-weight: 500 !important;
  padding: 10px 14px;
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.2);
  border-radius: 8px;
  margin-top: auto;
  line-height: 1.5;
}

/* ═══════════════════════ MCP Grid (Tab1 S6) ═══════════════════════ */

.mcp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(16px, 1.8vw, 24px);
  flex: 1;
  align-content: start;
}

.mcp-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(18px, 2vw, 28px);
}

.mcp-card.ado { border-top: 3px solid var(--cyan); }
.mcp-card.serena { border-top: 3px solid var(--violet); }

.mcp-card h3 {
  font-size: clamp(20px, 1.8vw, 28px);
  font-weight: 800;
  margin-bottom: 6px;
}

.mcp-sub {
  font-size: clamp(13px, 1.1vw, 16px);
  color: var(--text-2);
  margin-bottom: 20px;
}

.code-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.code-list code {
  display: block;
  padding: 10px 14px;
  background: var(--bg-2);
  font-size: clamp(12px, 1vw, 14px);
}

.mcp-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px 16px;
  background: var(--bg-2);
  border-radius: 8px;
}

.mcp-meta > div {
  display: flex;
  justify-content: space-between;
  font-size: clamp(12px, 1vw, 14px);
  color: var(--text-1);
}

.mcp-meta span {
  font-family: var(--font-mono);
  color: var(--text-3);
}

.mcp-highlight {
  padding: 14px 16px;
  background: linear-gradient(135deg, rgba(167, 139, 250, 0.12), rgba(167, 139, 250, 0.04));
  border: 1px solid rgba(167, 139, 250, 0.3);
  border-radius: 8px;
  font-size: clamp(13px, 1.1vw, 16px);
  line-height: 1.65;
  color: var(--text-1);
}

/* ═══════════════════════ Terminal Box (Tab1 S7) ═══════════════════════ */

.terminal-box {
  background: #040608;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(16px, 2vw, 28px) clamp(18px, 2.4vw, 32px);
  font-family: var(--font-mono);
  font-size: clamp(11px, 1vw, 13px);
  line-height: 1.8;
  flex: 1;
  overflow: auto;
  box-shadow: inset 0 0 40px rgba(0, 0, 0, 0.5);
}

.terminal-box pre {
  font-size: clamp(11px, 1vw, 13px);
  line-height: 1.8;
  background: transparent;
}

.prompt { color: var(--cyan); font-weight: 700; }
.user-input { color: var(--text-0); font-weight: 600; }
.ai-out { color: var(--text-1); }
.gate {
  color: var(--accent);
  font-weight: 700;
  display: inline-block;
  padding: 2px 8px;
  background: rgba(255, 140, 66, 0.1);
  border-radius: 4px;
}

/* ═══════════════════════ Pro/Con Grid ═══════════════════════ */

.pro-grid, .con-grid {
  display: grid;
  gap: clamp(10px, 1.1vw, 16px);
  flex: 1;
  align-content: start;
}

.pro-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.con-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.pro-card, .con-card {
  padding: clamp(14px, 1.4vw, 20px);
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.2s ease;
}

.pro-card {
  border-left: 3px solid var(--green);
}

.con-card {
  border-left: 3px solid var(--amber);
}

.pro-card:hover, .con-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

.pro-card b, .con-card b {
  display: block;
  font-size: clamp(15px, 1.3vw, 19px);
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-0);
}

.pro-card b { color: var(--green); }
.con-card b { color: var(--amber); }

.pro-card p, .con-card p {
  font-size: clamp(13px, 1.1vw, 16px);
  color: var(--text-1);
  line-height: 1.6;
}

/* ═══════════════════════ Mechanism Flow (Tab2 S2) ═══════════════════════ */

.mechanism-flow {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  padding: 20px 0;
}

.mech-step {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.6vw, 20px);
  padding: clamp(12px, 1.6vw, 18px) clamp(16px, 2vw, 24px);
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: min(560px, 100%);
}

.mech-step.final {
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(255, 140, 66, 0.1), rgba(255, 140, 66, 0.02));
}

.mech-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: #1a0f08;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  flex-shrink: 0;
}

.mech-step h4 {
  font-size: clamp(15px, 1.3vw, 19px);
  font-weight: 700;
  margin-bottom: 6px;
}

.mech-step code {
  font-size: clamp(12px, 1vw, 14px);
}

.mech-step p {
  font-size: clamp(13px, 1.05vw, 16px);
  color: var(--text-2);
  margin-top: 4px;
  line-height: 1.5;
}

.mech-arrow {
  font-size: clamp(16px, 1.4vw, 22px);
  color: var(--text-3);
}

/* ═══════════════════════ Code Compare (Tab2 S3) ═══════════════════════ */

.code-compare {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: clamp(12px, 1.2vw, 16px);
  flex: 1;
  align-content: start;
}

.code-card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.code-card.opus { border-top: 3px solid var(--opus-color); }
.code-card.sonnet { border-top: 3px solid var(--sonnet-color); }

.code-card-head {
  padding: 14px 20px;
  background: var(--bg-2);
  font-family: var(--font-mono);
  font-size: clamp(12px, 1vw, 14px);
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
}

.code-card pre {
  padding: 20px;
  font-size: clamp(12px, 1.05vw, 15px);
  line-height: 1.7;
  flex: 1;
}

.code-card pre b {
  color: var(--accent);
  font-weight: 700;
}

/* ═══════════════════════ Priority List (Tab2 S4) ═══════════════════════ */

.priority-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.priority-list li {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 18px 22px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.pri-num {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-3);
  color: var(--text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-family: var(--font-mono);
  flex-shrink: 0;
}

.priority-list li:nth-child(2) .pri-num {
  background: var(--accent);
  color: #1a0f08;
}

.pri-body {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.pri-body h4 {
  font-size: clamp(15px, 1.25vw, 18px);
  font-weight: 700;
  color: var(--text-0);
  margin: 0;
}

.pri-tag {
  font-size: clamp(12px, 1vw, 14px);
  color: var(--accent);
  font-weight: 600;
  padding: 5px 12px;
  background: rgba(255, 140, 66, 0.1);
  border-radius: 100px;
  margin-left: auto;
}

/* ═══════════════════════ Tools Table (Tab2 S5) ═══════════════════════ */

.tools-table {
  margin-bottom: 24px;
}

.tools-table table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-1);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.tools-table th {
  text-align: left;
  padding: 14px 22px;
  background: var(--bg-2);
  font-size: clamp(12px, 1vw, 14px);
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-family: var(--font-mono);
  border-bottom: 1px solid var(--border);
}

.tools-table td {
  padding: 16px 22px;
  font-size: clamp(13px, 1.1vw, 16px);
  color: var(--text-1);
  border-bottom: 1px solid var(--border);
  line-height: 1.5;
}

.tools-table tr:last-child td {
  border-bottom: none;
}

.tools-table td.deny {
  color: var(--red);
  font-weight: 500;
}

.role-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(10px, 0.85vw, 12px);
  font-weight: 700;
  padding: 4px 9px;
  border-radius: 4px;
  margin-right: 8px;
}

.role-tag.opus {
  background: rgba(167, 139, 250, 0.15);
  color: var(--opus-color);
}

.role-tag.sonnet {
  background: rgba(56, 228, 255, 0.15);
  color: var(--sonnet-color);
}

.insight {
  padding: 18px 22px;
  background: linear-gradient(135deg, rgba(56, 228, 255, 0.08), rgba(56, 228, 255, 0.02));
  border: 1px solid rgba(56, 228, 255, 0.2);
  border-radius: 10px;
  font-size: clamp(14px, 1.15vw, 17px);
  color: var(--text-1);
  line-height: 1.65;
}

.insight b {
  color: var(--cyan);
  font-weight: 700;
}

/* ═══════════════════════ Volume Grid (Tab2 S6) ═══════════════════════ */

.volume-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: clamp(12px, 1.2vw, 16px);
  margin-bottom: 16px;
}

.volume-card {
  padding: clamp(16px, 1.6vw, 24px);
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.volume-card.opus { border-left: 3px solid var(--opus-color); }
.volume-card.sonnet { border-left: 3px solid var(--sonnet-color); }

.volume-card h4 {
  font-size: clamp(16px, 1.3vw, 20px);
  font-weight: 700;
  margin-bottom: 14px;
}

.volume-bar {
  height: 10px;
  background: var(--bg-3);
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 14px;
}

.bar-fill {
  height: 100%;
  background: var(--opus-color);
  border-radius: 100px;
  transition: width 0.6s ease;
}

.bar-fill.big {
  background: var(--sonnet-color);
  box-shadow: 0 0 12px rgba(56, 228, 255, 0.4);
}

.volume-card ul {
  list-style: none;
}

.volume-card li {
  font-size: clamp(13px, 1.05vw, 15px);
  color: var(--text-1);
  padding: 4px 0 4px 12px;
  position: relative;
  line-height: 1.55;
}

.volume-card li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--text-3);
}

/* ═══════════════════════ Serena Compare (Tab2 S7) ═══════════════════════ */

.serena-compare {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(16px, 1.8vw, 24px);
  flex: 1;
  align-items: stretch;
}

.serena-col {
  padding: 32px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 20px;
}

.serena-col.without { border-top: 3px solid var(--red); }
.serena-col.with { border-top: 3px solid var(--green); }

.serena-col h4 {
  font-size: 18px;
  font-weight: 800;
}

.viz {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  flex: 1;
  justify-content: center;
  width: 100%;
}

.viz-bar {
  width: 100%;
  max-width: 220px;
  border-radius: 8px;
  background: var(--opus-color);
}

.viz-bar.big {
  height: 140px;
  box-shadow: 0 0 32px rgba(167, 139, 250, 0.4);
}

.viz-bar.small {
  height: 40px;
}

.viz-label {
  font-size: 14px;
  font-weight: 600;
}

.serena-col p {
  font-size: 14px;
  color: var(--text-1);
  line-height: 1.6;
}

/* ═══════════════════════ Verdict Grid (Tab2 S8) ═══════════════════════ */

.verdict-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: clamp(14px, 1.6vw, 20px);
  flex: 1;
  align-content: start;
}

.verdict-col {
  padding: clamp(20px, 2.2vw, 32px);
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.verdict-col.win { border-top: 3px solid var(--green); }
.verdict-col.lose { border-top: 3px solid var(--amber); }

.verdict-col h4 {
  font-size: clamp(17px, 1.5vw, 22px);
  font-weight: 800;
  margin-bottom: 16px;
}

.verdict-col.win h4 { color: var(--green); }
.verdict-col.lose h4 { color: var(--amber); }

.verdict-col ul {
  list-style: none;
}

.verdict-col li {
  padding: 12px 0 12px 24px;
  position: relative;
  font-size: clamp(14px, 1.15vw, 17px);
  color: var(--text-1);
  border-bottom: 1px dashed var(--border);
  line-height: 1.55;
}

.verdict-col li:last-child { border-bottom: none; }

.verdict-col.win li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
}

.verdict-col.lose li::before {
  content: '⚠';
  position: absolute;
  left: 0;
  color: var(--amber);
}

/* ═══════════════════════ Req Grid (Tab2 S9) ═══════════════════════ */

.req-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: clamp(14px, 1.6vw, 20px);
  margin-bottom: 20px;
}

.req-card {
  padding: clamp(18px, 2vw, 28px);
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.req-card.must { border-top: 3px solid var(--accent); }
.req-card.opt { border-top: 3px solid var(--text-3); }

.req-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(11px, 0.95vw, 13px);
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 5px 12px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.req-card.must .req-label {
  background: rgba(255, 140, 66, 0.15);
  color: var(--accent);
}

.req-card.opt .req-label {
  background: var(--bg-3);
  color: var(--text-2);
}

.req-card ul {
  list-style: none;
}

.req-card li {
  padding: 10px 0 10px 18px;
  position: relative;
  font-size: clamp(14px, 1.15vw, 17px);
  color: var(--text-1);
  line-height: 1.55;
}

.req-card li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--text-3);
}

/* ═══════════════════════ Layer Stack (Tab3 S2) ═══════════════════════ */

.layer-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
  justify-content: center;
}

.layer {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.6vw, 24px);
  padding: clamp(14px, 1.6vw, 22px) clamp(18px, 2vw, 28px);
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.2s ease;
}

.layer.hard { border-left: 4px solid var(--red); }
.layer.mid { border-left: 4px solid var(--amber); }
.layer.soft { border-left: 4px solid var(--cyan); }

.layer-num {
  width: clamp(42px, 3.4vw, 56px);
  height: clamp(42px, 3.4vw, 56px);
  border-radius: 10px;
  background: var(--bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(14px, 1.2vw, 18px);
  color: var(--text-0);
  flex-shrink: 0;
}

.layer-body {
  flex: 1;
  min-width: 0;
}

.layer-body h4 {
  font-size: clamp(15px, 1.3vw, 19px);
  font-weight: 700;
  margin-bottom: 4px;
}

.layer-body p {
  font-size: clamp(13px, 1.05vw, 16px);
  color: var(--text-2);
  line-height: 1.5;
}

.layer-tag {
  font-family: var(--font-mono);
  font-size: clamp(11px, 0.9vw, 13px);
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 100px;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.hard-tag {
  background: rgba(248, 113, 113, 0.15);
  color: var(--red);
}

.mid-tag {
  background: rgba(251, 191, 36, 0.15);
  color: var(--amber);
}

.soft-tag {
  background: rgba(56, 228, 255, 0.15);
  color: var(--cyan);
}

/* ═══════════════════════ File Tree (Tab3 S3) ═══════════════════════ */

.file-tree {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(16px, 2vw, 28px) clamp(18px, 2.4vw, 32px);
  font-family: var(--font-mono);
  font-size: clamp(11px, 1vw, 13px);
  line-height: 1.85;
  flex: 1;
  overflow: auto;
}

.file-tree pre {
  font-size: clamp(11px, 1vw, 13px);
  line-height: 1.85;
  color: var(--text-1);
}

.cm {
  color: var(--text-3);
  font-style: italic;
}

/* ═══════════════════════ Code Block / Reason Card (Tab3 S4) ═══════════════════════ */

.code-block {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  margin-bottom: 16px;
}

.code-block pre {
  font-size: clamp(13px, 1.05vw, 15px);
}

.reason-card {
  padding: 18px 22px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
}

.reason-card b {
  display: block;
  font-family: var(--font-mono);
  color: var(--red);
  font-size: clamp(13px, 1.1vw, 16px);
  margin-bottom: 6px;
}

.reason-card p {
  font-size: clamp(13px, 1.1vw, 16px);
  color: var(--text-1);
  line-height: 1.6;
}

/* ═══════════════════════ Check Grid (Tab3 S5) ═══════════════════════ */

.check-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(12px, 1.2vw, 16px);
  flex: 1;
  align-content: start;
}

.check-card {
  padding: clamp(18px, 1.8vw, 26px);
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-top: 3px solid var(--accent);
}

.check-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(11px, 0.95vw, 13px);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding: 4px 10px;
  background: rgba(255, 140, 66, 0.1);
  border-radius: 4px;
  margin-bottom: 10px;
}

.check-card h4 {
  font-size: clamp(15px, 1.3vw, 19px);
  font-weight: 700;
  margin-bottom: 12px;
}

.code-inline {
  font-family: var(--font-mono);
  font-size: clamp(12px, 1vw, 14px);
  color: var(--cyan);
  padding: 10px 14px;
  background: var(--bg-2);
  border-radius: 8px;
  line-height: 1.8;
  margin-bottom: 10px;
}

.check-card p {
  font-size: clamp(12px, 1vw, 14px);
  color: var(--text-2);
  line-height: 1.5;
}

.check-list {
  list-style: none;
}

.check-list li {
  font-size: clamp(12px, 1vw, 14px);
  color: var(--text-1);
  padding: 4px 0 4px 20px;
  position: relative;
  line-height: 1.5;
}

.check-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 700;
}

/* ═══════════════════════ Inject Demo (Tab3 S6) ═══════════════════════ */

.inject-demo {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1.2fr;
  gap: clamp(10px, 1.2vw, 16px);
  align-items: stretch;
  margin-bottom: 16px;
  flex: 1;
}

.inject-step {
  padding: 20px;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.inject-step h4 {
  font-size: clamp(14px, 1.15vw, 17px);
  color: var(--accent);
  margin-bottom: 10px;
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.inject-step p {
  font-size: clamp(13px, 1.1vw, 16px);
  color: var(--text-1);
  line-height: 1.6;
}

.inject-step p code {
  font-size: clamp(12px, 1vw, 14px);
}

.inject-arrow {
  display: flex;
  align-items: center;
  color: var(--text-3);
  font-size: clamp(22px, 1.8vw, 28px);
}

.inject-msg {
  font-family: var(--font-mono);
  font-size: clamp(11px, 0.95vw, 13px);
  padding: 14px 16px;
  background: var(--bg-2);
  border: 1px dashed var(--cyan);
  border-radius: 8px;
  color: var(--text-1);
  line-height: 1.65;
}

/* ═══════════════════════ Token Grid (Tab3 S7) ═══════════════════════ */

.token-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: clamp(14px, 1.6vw, 20px);
  margin-bottom: 16px;
  flex: 1;
}

.token-card {
  padding: clamp(18px, 2vw, 28px);
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
}

.token-card.start { border-top: 3px solid var(--cyan); }
.token-card.finish { border-top: 3px solid var(--accent); }

.token-card h4 {
  font-size: clamp(17px, 1.5vw, 22px);
  font-weight: 800;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.token-card h4 span {
  font-family: var(--font-mono);
  font-size: clamp(11px, 0.9vw, 13px);
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--bg-3);
  color: var(--text-2);
  font-weight: 600;
  letter-spacing: 0.05em;
}

.token-card pre {
  padding: 14px 16px;
  background: var(--bg-2);
  border-radius: 8px;
  font-size: clamp(12px, 1vw, 14px);
  margin-bottom: 14px;
  border: 1px solid var(--border);
}

.token-use {
  font-size: clamp(13px, 1.05vw, 15px) !important;
  font-weight: 700 !important;
  color: var(--text-0) !important;
  margin-bottom: 8px;
}

.token-card ul {
  list-style: none;
}

.token-card li {
  padding: 5px 0 5px 14px;
  font-size: clamp(13px, 1.05vw, 15px);
  line-height: 1.55;
  color: var(--text-1);
  position: relative;
}

/* ═══════════════════════ Split Grid (Tab3 S8) ═══════════════════════ */

.split-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: clamp(14px, 1.6vw, 20px);
  flex: 1;
  align-content: start;
}

.split-col {
  padding: clamp(20px, 2.2vw, 32px);
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
}

.split-col.hook { border-top: 3px solid var(--red); }
.split-col.skill { border-top: 3px solid var(--cyan); }

.split-col h4 {
  font-size: clamp(17px, 1.5vw, 22px);
  font-weight: 800;
  margin-bottom: 18px;
}

.split-col.hook h4 { color: var(--red); }
.split-col.skill h4 { color: var(--cyan); }

.split-col ul {
  list-style: none;
  flex: 1;
  margin-bottom: 16px;
}

.split-col li {
  padding: 10px 0 10px 24px;
  position: relative;
  font-size: clamp(13px, 1.1vw, 16px);
  color: var(--text-1);
  border-bottom: 1px dashed var(--border);
  line-height: 1.55;
}

.split-col li:last-child { border-bottom: none; }

.split-col.hook li::before {
  content: '🛡';
  position: absolute;
  left: 0;
  top: 10px;
  font-size: 13px;
}

.split-col.skill li::before {
  content: '📋';
  position: absolute;
  left: 0;
  top: 10px;
  font-size: 13px;
}

.split-reason {
  font-size: clamp(12px, 1vw, 14px);
  color: var(--text-3);
  font-style: italic;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  line-height: 1.5;
}

/* ═══════════════════════ Sequence Box (Tab3 S9) ═══════════════════════ */

.sequence-box {
  background: #040608;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(16px, 2vw, 28px) clamp(18px, 2.4vw, 32px);
  margin-bottom: 16px;
  overflow: auto;
}

.sequence-box pre {
  font-size: clamp(11px, 1vw, 13px);
  line-height: 1.85;
  color: var(--text-1);
}

.ok {
  color: var(--green);
  font-weight: 700;
}

/* ═══════════════════════ Control Bar ═══════════════════════ */

.control-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: clamp(60px, 7vh, 76px);
  padding: 0 clamp(12px, 2vw, 32px);
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.4vw, 20px);
  background: rgba(5, 7, 13, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
}

.nav-btn {
  width: clamp(38px, 3.2vw, 44px);
  height: clamp(38px, 3.2vw, 44px);
  border-radius: 50%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  color: var(--text-1);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.nav-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(255, 140, 66, 0.08);
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.progress-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
  max-width: 480px;
}

.slide-counter {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-1);
  min-width: 54px;
}

.slide-counter #currentSlide {
  color: var(--accent);
  font-size: 16px;
}

.counter-sep {
  color: var(--text-3);
  margin: 0 4px;
}

.progress-bar {
  flex: 1;
  height: 4px;
  background: var(--bg-2);
  border-radius: 100px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, #ffb57a 100%);
  width: 0%;
  transition: width 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
  border-radius: 100px;
  box-shadow: 0 0 12px var(--accent-glow);
}

.dots {
  display: flex;
  gap: 6px;
  flex: 1;
  justify-content: center;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--bg-3);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
}

.dot:hover {
  background: var(--border-strong);
}

.dot.active {
  background: var(--accent);
  width: 24px;
  border-radius: 4px;
  box-shadow: 0 0 8px var(--accent-glow);
}

/* ═══════════════════════ Overlay (Raw MD) ═══════════════════════ */

.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  animation: overlayIn 0.25s ease;
}

.overlay[hidden] {
  display: none;
}

@keyframes overlayIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.overlay-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 3, 6, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
}

.overlay-panel {
  position: relative;
  width: 100%;
  max-width: 1080px;
  height: 100%;
  max-height: 92vh;
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: panelIn 0.35s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes panelIn {
  from { transform: translateY(24px) scale(0.98); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

.overlay-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 24px 32px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
}

.overlay-kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.overlay-head h3 {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--text-0);
}

.overlay-close {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-1);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.overlay-close:hover {
  background: rgba(248, 113, 113, 0.1);
  border-color: var(--red);
  color: var(--red);
}

.overlay-body {
  padding: 32px 40px;
  overflow-y: auto;
  flex: 1;
  color: var(--text-1);
  line-height: 1.7;
  font-size: 14px;
}

.overlay-body .loading {
  text-align: center;
  color: var(--text-2);
  padding: 40px;
  font-family: var(--font-mono);
}

/* Markdown Styling inside overlay */

.overlay-body h1 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text-0);
  letter-spacing: -0.02em;
}

.overlay-body h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 32px 0 14px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--accent);
}

.overlay-body h2:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 24px;
}

.overlay-body h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 24px 0 10px;
  color: var(--text-0);
  font-family: var(--font-sans);
}

.overlay-body h4 {
  font-size: 15px;
  font-weight: 700;
  margin: 16px 0 8px;
  color: var(--cyan);
}

.overlay-body p {
  margin: 10px 0;
  color: var(--text-1);
}

.overlay-body ul, .overlay-body ol {
  margin: 10px 0;
  padding-left: 24px;
}

.overlay-body li {
  margin: 4px 0;
  color: var(--text-1);
}

.overlay-body code {
  background: var(--bg-2);
  color: var(--cyan);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  border: 1px solid var(--border);
}

.overlay-body pre {
  background: #040608;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  margin: 14px 0;
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.7;
}

.overlay-body pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--text-1);
}

.overlay-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 8px 18px;
  margin: 14px 0;
  background: rgba(255, 140, 66, 0.04);
  color: var(--text-1);
  border-radius: 0 8px 8px 0;
}

.overlay-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.overlay-body th {
  background: var(--bg-2);
  padding: 10px 14px;
  text-align: left;
  font-weight: 700;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
}

.overlay-body td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  color: var(--text-1);
}

.overlay-body tr:last-child td {
  border-bottom: none;
}

.overlay-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

.overlay-body strong {
  color: var(--text-0);
  font-weight: 700;
}

.overlay-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px dashed var(--cyan);
}

/* ═══════════════════════ Tooltip System ═══════════════════════ */

.tooltip-term {
  border-bottom: 1px dashed var(--accent);
  cursor: help;
  color: inherit;
  transition: color 0.15s ease;
}

.tooltip-term:hover {
  color: var(--accent);
}

/* File extension variant — cyan to match code/terminal aesthetic */
.ext-tip {
  border-bottom: 1px dashed var(--cyan);
  cursor: help;
  color: var(--cyan);
  transition: opacity 0.15s ease;
}

.ext-tip:hover {
  opacity: 0.75;
}

#tooltip-bubble {
  position: fixed;
  z-index: 300;
  max-width: 340px;
  padding: 10px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border-strong);
  border-top: 2px solid var(--accent);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 140, 66, 0.08);
  font-size: 13px;
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--text-1);
  line-height: 1.65;
  pointer-events: none;
  opacity: 0;
  transform: translateY(5px);
  transition: opacity 0.15s ease, transform 0.15s ease;
  letter-spacing: 0;
}

#tooltip-bubble.visible {
  opacity: 1;
  transform: translateY(0);
}

#tooltip-bubble .tt-name {
  display: block;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ═══════════════════════ Responsive Breakpoints ═══════════════════════ */

/* Large screens — cap max width for readability */
/* Large monitors: expand content and typography to reduce whitespace */
@media (min-width: 1500px) {
  .cover-inner { max-width: 1400px; }
  .end-inner { max-width: 1200px; }
  .stack-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
  .agent-cards { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
  .mcp-grid { grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); }
  .pro-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
  .con-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
  .volume-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
  .serena-compare { grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); }
  .verdict-grid { grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); }
  .req-grid { grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); }
  .check-grid { grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); }
  .token-grid { grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); }
  .split-grid { grid-template-columns: repeat(auto-fit, minmax(380px, 1fr)); }
  .two-col, .code-compare { grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); }
}

/* Ultra-wide: further scale */
@media (min-width: 1800px) {
  .slide { padding: clamp(56px, 4vw, 88px) clamp(80px, 8vw, 180px); }
  .cover-inner { max-width: 1600px; }
  .end-inner { max-width: 1320px; }
}

/* 4K+ */
@media (min-width: 2400px) {
  :root { font-size: 18px; }
  .cover-inner { max-width: 1900px; }
  .end-inner { max-width: 1600px; }
}

/* Medium-large → tablet landscape */
@media (max-width: 1280px) {
  .inject-demo { grid-template-columns: 1fr; }
  .inject-arrow { transform: rotate(90deg); justify-content: center; }
}

/* Tablet */
@media (max-width: 900px) {
  .brand-sub { display: none; }
  .tab-index { display: none; }
  .dots { display: none; }
  .progress-wrap { max-width: none; }
  .mech-step { width: 100%; }
  .layer { flex-wrap: wrap; gap: 12px; }
  .layer-tag { margin-left: auto; }
  .pri-tag { margin-left: 0; }
  .priority-list li { flex-wrap: wrap; }
  .trigger-row { flex-direction: column; align-items: flex-start; gap: 8px; }
  .trigger-arrow { display: none; }
}

/* Phone */
@media (max-width: 600px) {
  .brand-title { font-size: 12px; }
  .tab-btn { padding: 6px 9px; font-size: 11px; }
  .tab-nav { padding: 3px; gap: 2px; }
  .slide-counter { font-size: 11px; min-width: 42px; }
  .slide-counter #currentSlide { font-size: 13px; }
  .tool-tags span { font-size: 10px; padding: 2px 6px; }
  .check-list li, .verdict-col li, .split-col li { font-size: 12px; }
  .tools-table th, .tools-table td { padding: 10px 12px; font-size: 12px; }
  .cover-meta > div { font-size: 11px; padding: 7px 12px; }
  .layer-num { width: 38px; height: 38px; font-size: 13px; }
  .pri-num { width: 34px; height: 34px; }
  .mech-num { width: 30px; height: 30px; font-size: 13px; }
}

/* Very narrow phones */
@media (max-width: 380px) {
  .brand-title { display: none; }
  .brand-dot { margin-right: 0; }
  .tab-btn { padding: 5px 8px; font-size: 10.5px; }
}

/* Short viewport height (landscape phone, small laptop) */
@media (max-height: 700px) {
  .slide { padding-top: clamp(16px, 2.2vw, 32px); padding-bottom: clamp(16px, 2.2vw, 32px); }
  .slide-head { margin-bottom: 14px; padding-bottom: 12px; }
  .slide-head h2 { font-size: clamp(20px, 2.4vw, 28px); }
  .cover-badge { margin-bottom: 16px; }
  .cover-desc { margin-bottom: 22px; }
  .cover-title { font-size: clamp(28px, 4.4vw, 48px); }
  .end-slide h2 { font-size: clamp(24px, 3.2vw, 38px); }
  .end-desc { margin-bottom: 22px; }
}

/* Very short */
@media (max-height: 560px) {
  .slide-head h2 { font-size: 20px; }
  .slide-sub { font-size: 12px; }
  .flow-chart { gap: 6px; padding: 6px 0; }
  .flow-node { padding: 8px 16px; font-size: 12px; }
  .mechanism-flow { gap: 4px; padding: 4px 0; }
  .mech-step { padding: 10px 14px; }
  .layer { padding: 10px 16px; }
}