/* Hybrid Cognition - Presentation Slides */

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

:root {
  --navy: #1B2A4A;
  --navy-light: #243558;
  --accent-blue: #3A7CB8;
  --accent-blue-light: #4A8FD4;
  --orange: #E07B3A;
  --orange-light: #F09050;
  --white: #FFFFFF;
  --off-white: #F5F7FA;
  --text-light: #CBD5E1;
  --text-muted: #8899AA;
}

html, body {
  height: 100%;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--navy);
  color: var(--white);
  overflow: hidden;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  background: rgba(27, 42, 74, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(58, 124, 184, 0.2);
  z-index: 100;
}

.nav-brand {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.nav-arrows {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-arrows .slide-indicator {
  font-size: 13px;
  color: var(--text-muted);
  margin: 0 12px;
  font-variant-numeric: tabular-nums;
}

.nav-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: rgba(58, 124, 184, 0.15);
  border: 1px solid rgba(58, 124, 184, 0.3);
  color: var(--accent-blue-light);
  text-decoration: none;
  font-size: 20px;
  transition: all 0.2s ease;
}

.nav-arrow:hover {
  background: rgba(58, 124, 184, 0.3);
  color: var(--white);
  border-color: var(--accent-blue);
}

.nav-arrow.disabled {
  opacity: 0.25;
  pointer-events: none;
}

/* Slide container */
.slide {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 60px 40px;
}

.slide-content {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

/* Typography */
h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 16px;
}

h2 {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 12px;
}

h3 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.3;
}

.subtitle {
  font-size: 20px;
  color: var(--text-light);
  font-weight: 400;
  line-height: 1.5;
}

.label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--orange);
  margin-bottom: 12px;
}

/* Slide 1: Agent-First */
.comparison {
  display: grid;
  grid-template-columns: 1fr 60px 1fr;
  gap: 0;
  align-items: stretch;
  margin-top: 48px;
}

.comparison-side {
  background: var(--navy-light);
  border-radius: 16px;
  padding: 40px 36px;
  position: relative;
}

.comparison-side.after {
  background: linear-gradient(135deg, rgba(58, 124, 184, 0.15), rgba(224, 123, 58, 0.08));
  border: 1px solid rgba(58, 124, 184, 0.25);
}

.comparison-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: var(--text-muted);
}

.comparison-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.comparison-side .comparison-label {
  color: var(--text-muted);
}

.comparison-side.after .comparison-label {
  color: var(--orange);
}

.diagram-horizontal {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin: 24px 0;
}

.diagram-vertical {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin: 24px 0;
}

.icon-box {
  width: 64px;
  height: 64px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  line-height: 1.2;
}

.icon-box.word {
  background: #2B579A;
}

.icon-box.chatgpt {
  background: #10A37F;
}

.icon-box.agent {
  background: var(--orange);
  width: 72px;
  height: 72px;
  border-radius: 16px;
  font-size: 14px;
}

.icon-box.human {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent-blue);
  font-size: 12px;
}

.arrow-down {
  color: var(--text-muted);
  font-size: 20px;
  line-height: 1;
}

.quote {
  font-size: 14px;
  color: var(--text-light);
  font-style: italic;
  margin-top: 20px;
  padding: 12px 16px;
  border-left: 2px solid rgba(58, 124, 184, 0.3);
  line-height: 1.5;
}

.comparison-side.after .quote {
  border-left-color: var(--orange);
}

/* Slide 2: Bicycle */
.bicycle-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-top: 32px;
}

.bicycle-svg {
  display: flex;
  justify-content: center;
  align-items: center;
}

.bicycle-svg svg {
  width: 100%;
  max-width: 420px;
  height: auto;
}

.rules-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.rule {
  padding-left: 24px;
  border-left: 3px solid var(--orange);
}

.rule-number {
  font-size: 13px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.rule-title {
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 6px;
}

.rule-subtitle {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.5;
}

/* Slide 3: Build Skill */
.phases {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0;
  align-items: start;
  margin-top: 48px;
}

.phase {
  background: var(--navy-light);
  border-radius: 16px;
  padding: 32px 28px;
  text-align: center;
  position: relative;
}

.phase-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--orange);
  color: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

.phase h3 {
  margin-bottom: 12px;
  font-size: 22px;
}

.phase-desc {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

.phase-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 8px;
  margin-top: 52px;
  color: var(--accent-blue);
  font-size: 28px;
}

.phase-principles {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.principle-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  background: rgba(58, 124, 184, 0.15);
  color: var(--accent-blue-light);
  letter-spacing: 0.5px;
}

.loop-banner {
  margin-top: 40px;
  text-align: center;
  padding: 20px;
  border: 1px dashed rgba(224, 123, 58, 0.4);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

.loop-banner .loop-icon {
  font-size: 28px;
  color: var(--orange);
}

.loop-banner p {
  font-size: 16px;
  color: var(--text-light);
}

.loop-banner strong {
  color: var(--orange);
}

/* Slide 4: Closing */
.closing {
  text-align: center;
}

.closing h1 {
  font-size: 56px;
  margin-bottom: 24px;
}

.closing .subtitle {
  font-size: 22px;
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.6;
}

.closing-concepts {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 56px;
}

.concept {
  text-align: center;
}

.concept-icon {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 12px;
}

.concept-icon.c1 { background: rgba(58, 124, 184, 0.2); }
.concept-icon.c2 { background: rgba(224, 123, 58, 0.2); }
.concept-icon.c3 { background: rgba(16, 163, 127, 0.2); }

.concept-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-light);
}

/* Keyboard navigation */
body:focus {
  outline: none;
}

/* Responsive */
@media (max-width: 900px) {
  .comparison {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .comparison-divider {
    display: none;
  }
  .bicycle-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .phases {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .phase-arrow {
    transform: rotate(90deg);
    margin: 0;
    padding: 8px 0;
  }
  h1 { font-size: 32px; }
  h2 { font-size: 24px; }
  .slide { padding: 72px 24px 24px; }
}