/* 
 * WithAmplifier Design System Overrides for Presentation Decks
 * Applies brand fonts, colors, and design system touches
 * 
 * NOTE: This file is loaded AFTER shared-variables.css and deck-specific styles
 * It applies the withamplifier brand on top of existing deck styling
 */

:root {
  /* Brand colors - Signal purple */
  --color-accent: #5B4DE3;
  --color-accent-dim: rgba(91, 77, 227, 0.15);
  --color-accent-glow: rgba(91, 77, 227, 0.25);
  --color-signal: #5B4DE3; /* Use Signal purple, not red */
  
  /* Design system colors */
  --ink-black: #0A0A0B;
  --ink-slate: rgba(255, 255, 255, 0.6);
  --ink-ghost: #F8F9FA;
  
  /* Refined backgrounds */
  --bg-card: rgba(248, 249, 250, 0.03);
  --bg-card-hover: rgba(248, 249, 250, 0.06);
  --border-card: rgba(248, 249, 250, 0.08);
}

/* Typography: Apply brand fonts */
body {
  font-family: var(--font-body, 'Epilogue'), -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
  background: var(--color-bg, #0A0A0B);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Headlines: Use Syne for brand voice */
.headline,
.medium-headline,
.card-title {
  font-family: var(--font-heading, 'Syne'), system-ui, sans-serif;
  text-wrap: balance; /* Prevent awkward line breaks */
}

.headline {
  letter-spacing: var(--tracking-display, -0.03em);
  font-weight: var(--weight-bold, 700);
}

.medium-headline {
  letter-spacing: var(--tracking-headline, -0.02em);
  font-weight: var(--weight-semibold, 600);
}

/* Section labels: Use Signal purple for emphasis */
.section-label {
  color: var(--color-accent);
  letter-spacing: var(--tracking-eyebrow, 0.06em);
}

/* Subheads: Use secondary text color */
.subhead {
  color: var(--color-text-secondary, rgba(255, 255, 255, 0.7));
}

/* Cards: Refined with design system colors */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(248, 249, 250, 0.12);
  transform: translateY(-2px);
}

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

.card-text {
  color: var(--color-text-secondary, rgba(255, 255, 255, 0.7));
}

/* Feature lists: Refined check marks */
.check {
  color: var(--color-accent);
}

/* Diagram boxes: Design system treatment */
.diagram-box {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  backdrop-filter: blur(10px);
}

.diagram-box.highlight {
  background: var(--color-accent-dim);
  border-color: var(--color-accent);
}

/* Navigation dots: Match accent color */
.nav-dot.active {
  background: var(--color-accent);
  box-shadow: 0 0 12px var(--color-accent-glow);
}

/* Close button: Subtle with accent on hover */
.close-btn {
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.2s ease;
}

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

/* Code blocks: Use mono font from design system */
code, pre {
  font-family: var(--font-mono, 'JetBrains Mono'), 'SF Mono', Monaco, Consolas, monospace;
  background: rgba(248, 249, 250, 0.05);
  border: 1px solid var(--border-card);
}

/* Links: Brand accent color */
a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-text);
}

/* Close button - fixed top-right position */
.back-link,
.more-stories {
  position: fixed;
  top: 20px;
  right: 24px;
  left: auto;
  color: var(--color-text-muted, rgba(255, 255, 255, 0.5));
  font-size: 0; /* Hide original text */
  font-weight: 500;
  transition: all 0.2s ease;
  z-index: 100;
  text-decoration: none;
  background: rgba(10, 10, 11, 0.6);
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* X icon via pseudo-element */
.back-link::after,
.more-stories::after {
  content: '×';
  font-size: 28px;
  line-height: 1;
  color: rgba(255, 255, 255, 0.5);
  font-weight: 300;
}

.back-link:hover,
.more-stories:hover {
  transform: scale(1.05);
  background: rgba(10, 10, 11, 0.8);
  border-color: rgba(255, 255, 255, 0.25);
}

.back-link:hover::after,
.more-stories:hover::after {
  color: rgba(255, 255, 255, 0.8);
}

/* Mobile: same position, slightly smaller */
@media (max-width: 768px) {
  .back-link,
  .more-stories {
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
  }
  
  .back-link::after,
  .more-stories::after {
    font-size: 24px;
  }
}

/* ═══════════════════════════════════════════════════════════════════════════
   SLIDE TRANSITIONS
   ═══════════════════════════════════════════════════════════════════════════ */

/* Page load fade-in */
body {
  animation: fadeIn 0.4s ease-out;
}

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

/* Slide transitions */
.slide {
  opacity: 0;
  transform: translateX(20px);
  transition: opacity 0.35s ease-out, transform 0.35s ease-out;
}

.slide.active {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger content within slides for polish */
.slide.active .headline,
.slide.active .medium-headline,
.slide.active .section-label {
  animation: slideUp 0.4s ease-out backwards;
}

.slide.active .subhead,
.slide.active .card-text,
.slide.active p {
  animation: slideUp 0.4s ease-out 0.1s backwards;
}

.slide.active .card,
.slide.active .diagram-box,
.slide.active .feature-grid > * {
  animation: slideUp 0.4s ease-out 0.15s backwards;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Reduced motion: respect user preference */
@media (prefers-reduced-motion: reduce) {
  body,
  .slide,
  .slide.active .headline,
  .slide.active .medium-headline,
  .slide.active .section-label,
  .slide.active .subhead,
  .slide.active .card-text,
  .slide.active p,
  .slide.active .card,
  .slide.active .diagram-box,
  .slide.active .feature-grid > * {
    animation: none;
    transition: none;
  }
  
  .slide {
    opacity: 1;
    transform: none;
  }
}

/* Smooth scrolling for better UX */
html {
  scroll-behavior: smooth;
}

/* Touch interactions: Better feedback */
.nav-dot,
.close-btn,
.card {
  -webkit-tap-highlight-color: var(--color-accent-dim);
}

/* Subtle particle-inspired gradient overlay */
.slide::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at 50% 50%, var(--color-accent-dim) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}

/* Mobile: Ensure safe areas */
@media (max-width: 768px) {
  .slide {
    padding-left: max(env(safe-area-inset-left), 20px);
    padding-right: max(env(safe-area-inset-right), 20px);
    padding-bottom: max(env(safe-area-inset-bottom), 80px);
  }
  
  .nav {
    bottom: max(env(safe-area-inset-bottom), 20px);
  }
}

/* Accessibility: Focus states */
.nav-dot:focus,
.close-btn:focus,
a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Print: Clean presentation */
@media print {
  .nav,
  .close-btn {
    display: none;
  }
  
  .slide {
    display: block !important;
    page-break-after: always;
  }
}