:root {
  /* Primitive Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(251, 253, 255, 1);
  --color-cream-100: rgba(242, 246, 255, 1);
  --color-gray-200: rgba(226, 232, 240, 1);
  --color-gray-300: rgba(148, 163, 184, 1);
  --color-gray-400: rgba(100, 116, 139, 1);
  --color-slate-500: rgba(94, 106, 135, 1);
  --color-brown-600: rgba(61, 75, 107, 1);
  --color-charcoal-700: rgba(16, 24, 40, 1);
  --color-charcoal-800: rgba(12, 17, 31, 1);
  --color-slate-900: rgba(8, 12, 24, 1);
  --color-teal-300: rgba(56, 189, 248, 1);
  --color-teal-400: rgba(34, 211, 238, 1);
  --color-teal-500: rgba(59, 130, 246, 1);
  --color-teal-600: rgba(37, 99, 235, 1);
  --color-teal-700: rgba(29, 78, 216, 1);
  --color-teal-800: rgba(30, 64, 175, 1);
  --color-red-400: rgba(248, 113, 113, 1);
  --color-red-500: rgba(220, 38, 38, 1);
  --color-orange-400: rgba(236, 72, 153, 1);
  --color-orange-500: rgba(217, 70, 239, 1);

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 61, 75, 107;
  --color-teal-500-rgb: 59, 130, 246;
  --color-slate-900-rgb: 8, 12, 24;
  --color-slate-500-rgb: 94, 106, 135;
  --color-red-500-rgb: 220, 38, 38;
  --color-red-400-rgb: 248, 113, 113;
  --color-orange-500-rgb: 217, 70, 239;
  --color-orange-400-rgb: 236, 72, 153;

  /* Background color tokens (Light Mode) */
  --color-bg-1: rgba(99, 102, 241, 0.16);
  --color-bg-2: rgba(217, 70, 239, 0.12);
  --color-bg-3: rgba(56, 189, 248, 0.12);
  --color-bg-4: rgba(30, 64, 175, 0.12);
  --color-bg-5: rgba(190, 24, 93, 0.12);
  --color-bg-6: rgba(14, 165, 233, 0.12);
  --color-bg-7: rgba(236, 72, 153, 0.16);
  --color-bg-8: rgba(14, 116, 173, 0.12);

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: rgba(255, 255, 255, 0.88);
  --color-surface-glass: rgba(255, 255, 255, 0.75);
  --color-text: var(--color-slate-900);
  --color-text-secondary: rgba(var(--color-slate-500-rgb), 0.8);
  --color-primary: var(--color-teal-600);
  --color-primary-hover: var(--color-teal-500);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-teal-500-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-teal-500-rgb), 0.18);
  --color-secondary-active: rgba(var(--color-teal-500-rgb), 0.22);
  --color-border: rgba(var(--color-brown-600-rgb), 0.18);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.1);
  --color-card-border-inner: rgba(var(--color-teal-500-rgb), 0.08);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "Manrope", "Inter", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-size-xs: 14px;
  --font-size-sm: 16px;
  --font-size-base: 18px;
  --font-size-md: 18px;
  --font-size-lg: 21px;
  --font-size-xl: 23px;
  --font-size-2xl: 26px;
  --font-size-3xl: 31px;
  --font-size-4xl: 39px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;
  --footer-height: 64px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    --color-gray-400-rgb: 119, 124, 124;
    --color-teal-300-rgb: 50, 184, 198;
    --color-gray-300-rgb: 167, 169, 169;
    --color-gray-200-rgb: 245, 245, 245;

    --color-bg-1: rgba(29, 78, 216, 0.15);
    --color-bg-2: rgba(180, 83, 9, 0.15);
    --color-bg-3: rgba(21, 128, 61, 0.15);
    --color-bg-4: rgba(185, 28, 28, 0.15);
    --color-bg-5: rgba(107, 33, 168, 0.15);
    --color-bg-6: rgba(194, 65, 12, 0.15);
    --color-bg-7: rgba(190, 24, 93, 0.15);
    --color-bg-8: rgba(8, 145, 178, 0.15);

    --color-background: rgba(3, 7, 18, 1);
    --color-surface: rgba(7, 16, 32, 0.95);
    --color-surface-glass: rgba(8, 17, 35, 0.82);
    --color-text: rgba(226, 232, 240, 0.98);
    --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.78);
    --color-primary: var(--color-teal-300);
    --color-primary-hover: var(--color-teal-400);
    --color-primary-active: rgba(37, 99, 235, 1);
    --color-secondary: rgba(var(--color-teal-500-rgb), 0.16);
    --color-secondary-hover: rgba(var(--color-teal-500-rgb), 0.24);
    --color-secondary-active: rgba(var(--color-teal-500-rgb), 0.3);
    --color-border: rgba(var(--color-gray-400-rgb), 0.28);
    --color-error: var(--color-red-400);
    --color-success: var(--color-teal-300);
    --color-warning: var(--color-orange-400);
    --color-info: rgba(148, 163, 184, 0.85);
    --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.35);
    --color-btn-primary-text: rgba(250, 250, 255, 0.94);
    --color-card-border: rgba(var(--color-gray-400-rgb), 0.2);
    --color-card-border-inner: rgba(var(--color-teal-500-rgb), 0.22);
    --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
      inset 0 -1px 0 rgba(0, 0, 0, 0.15);
    --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

    --color-success-rgb: var(--color-teal-300-rgb);
    --color-error-rgb: var(--color-red-400-rgb);
    --color-warning-rgb: var(--color-orange-400-rgb);
    --color-info-rgb: var(--color-gray-300-rgb);
    --footer-height: 60px;
  }
}

/* Beautiful link styling - fat and white */
a {
  color: var(--color-white);
  text-decoration: none;
  transition: all var(--duration-normal) var(--ease-standard);
  position: relative;
  font-weight: var(--font-weight-bold);
  border-bottom: 2px solid var(--color-white);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

a:hover {
  color: var(--color-white);
  border-bottom-color: var(--color-white);
  text-shadow: 0 0 12px rgba(255, 255, 255, 0.6), 0 2px 8px rgba(0, 0, 0, 0.3);
  transform: translateY(-1px);
}

a:active {
  color: var(--color-white);
  border-bottom-color: var(--color-white);
  transform: translateY(0);
}

a:focus {
  outline: 2px solid var(--color-white);
  outline-offset: 2px;
  border-radius: 2px;
}

/* External links get a subtle icon */
a[target="_blank"]::after {
  content: "↗";
  display: inline-block;
  margin-left: 4px;
  font-size: 0.85em;
  opacity: 0.9;
  transition: all var(--duration-fast) var(--ease-standard);
  transform: translateY(-1px);
}

a[target="_blank"]:hover::after {
  opacity: 1;
  transform: translateY(-2px) translateX(2px);
}

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

body {
  font-family: var(--font-family-base);
  background:
    radial-gradient(
      140% 160% at 18% 20%,
      rgba(var(--color-teal-500-rgb), 0.32),
      transparent 60%
    ),
    radial-gradient(
      170% 220% at 82% 80%,
      rgba(var(--color-orange-500-rgb), 0.26),
      transparent 70%
    ),
    linear-gradient(160deg, #030712 0%, #060a1a 45%, #010726 100%);
  color: var(--color-text);
  overflow: hidden;
  min-height: 100vh;
  position: relative;
  isolation: isolate;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: -20vh -20vw;
  z-index: 0;
  pointer-events: none;
}

body::before {
  background:
    radial-gradient(40% 40% at 24% 30%, rgba(56, 189, 248, 0.25), transparent 65%),
    radial-gradient(55% 55% at 78% 68%, rgba(217, 70, 239, 0.18), transparent 70%);
  filter: blur(0) saturate(140%);
  mix-blend-mode: screen;
  animation: auroraPulse 18s ease-in-out infinite alternate;
}

body::after {
  background-image:
    linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.06) 1px,
      rgba(0, 0, 0, 0) 0
    ),
    linear-gradient(
      rgba(255, 255, 255, 0.06) 1px,
      rgba(0, 0, 0, 0) 0
    );
  background-size: 120px 120px;
  opacity: 0.18;
  transform: translate3d(0, 0, 0);
  mix-blend-mode: soft-light;
  animation: gridShift 30s linear infinite;
}

#shader-background {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

#shader-background.shader-hidden {
  display: none !important;
  visibility: hidden !important;
  pointer-events: none !important;
  opacity: 0 !important;
}

#shader-background canvas {
  width: 100%;
  height: 100%;
  display: block;
  opacity: 1.0;
  mix-blend-mode: screen;
}

#shader-background.shader-fallback {
  background:
    radial-gradient(120% 180% at 30% 20%, rgba(33, 128, 141, 0.35), transparent 60%),
    radial-gradient(140% 200% at 70% 80%, rgba(230, 129, 97, 0.28), transparent 70%);
}

.presentation-container {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 2;
  background: var(--color-surface-glass);
  backdrop-filter: saturate(160%) blur(4px);
  border: 1px solid rgba(var(--color-teal-500-rgb), 0.16);
  box-shadow: 0 40px 140px rgba(10, 24, 64, 0.32);
  border-radius: 24px;
  overflow: hidden;
}

.presentation-container::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(
      135deg,
      rgba(var(--color-teal-500-rgb), 0.14),
      rgba(var(--color-orange-500-rgb), 0.12) 48%,
      rgba(99, 102, 241, 0.18)
    );
  opacity: 0.9;
  mix-blend-mode: color-dodge;
  z-index: -1;
}

.slide {
  display: none;
  width: 100%;
  height: calc(100vh - var(--footer-height));
  padding: var(--space-32);
  overflow-y: auto;
}

.slide.active {
  display: flex;
  flex-direction: column;
  animation: slideIn 0.3s var(--ease-standard);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes auroraPulse {
  0% {
    transform: translate3d(-2%, -1%, 0) scale(1.02);
    opacity: 0.65;
  }
  50% {
    transform: translate3d(1.5%, 1.5%, 0) scale(1.08);
    opacity: 0.85;
  }
  100% {
    transform: translate3d(-1%, 2%, 0) scale(1.04);
    opacity: 0.7;
  }
}

@keyframes gridShift {
  0% {
    transform: translate3d(0, 0, 0);
  }
  100% {
    transform: translate3d(-120px, -160px, 0);
  }
}

.slide-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-24);
  letter-spacing: var(--letter-spacing-tight);
  text-shadow: 0 12px 24px rgba(var(--color-teal-500-rgb), 0.25);
}

@supports (-webkit-background-clip: text) {
  .slide-title {
    background-image: linear-gradient(
      120deg,
      rgba(var(--color-teal-500-rgb), 0.95) 0%,
      rgba(var(--color-orange-500-rgb), 0.85) 48%,
      rgba(99, 102, 241, 0.9) 100%
    );
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
  }
}

.slide-subtitle {
  font-size: var(--font-size-xl);
  color: #fff;
  margin-bottom: var(--space-32);
  text-shadow: 0 8px 20px rgba(var(--color-teal-500-rgb), 0.12);
}

.slide-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-20);
}

.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-16);
}

.model-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(238, 244, 255, 0.85));
  border: 1px solid rgba(var(--color-teal-500-rgb), 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  box-shadow: 0 18px 40px rgba(15, 40, 80, 0.12);
}

.model-card h3 {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-12);
  font-family: var(--font-family-mono);
}

.model-spec {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.spec-item {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-sm);
}

.spec-label {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.spec-value {
  color: var(--color-text);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
}

.use-case {
  background: var(--color-bg-1);
  padding: var(--space-8) var(--space-12);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  margin-top: var(--space-8);
}

.section-content {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(235, 243, 255, 0.88));
  border: 1px solid rgba(var(--color-teal-500-rgb), 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
  box-shadow: 0 24px 55px rgba(12, 30, 72, 0.16);
}

.bullet-list {
  list-style: none;
  padding: 0;
}

.bullet-list li {
  padding: var(--space-12) 0;
  padding-left: var(--space-24);
  position: relative;
  font-size: var(--font-size-base);
  line-height: 1.3;
}

.bullet-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

/* Nested lists inside bullet-list: show only arrow (no marker) */
.bullet-list li > ul {
  list-style: none !important;
  padding-left: 0;
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.bullet-list li > ul > li {
  padding-left: calc(var(--space-24) + var(--space-24));
  position: relative;
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
  list-style: none !important;
  list-style-type: none !important;
}

.bullet-list li > ul > li::marker {
  display: none !important;
  content: "" !important;
}

.bullet-list li > ul > li::before {
  display: none !important;
}

.bullet-list li > ul > li::after {
  content: "▸";
  position: absolute;
  left: var(--space-24);
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
}

.highlight-box {
  background: linear-gradient(
    135deg,
    rgba(var(--color-teal-500-rgb), 0.1),
    rgba(var(--color-orange-400-rgb), 0.14)
  );
  border-left: 4px solid transparent;
  border-image: linear-gradient(
      180deg,
      rgba(var(--color-teal-500-rgb), 0.9),
      rgba(var(--color-orange-500-rgb), 0.85)
    )
    1;
  padding: var(--space-16);
  margin: var(--space-16) 0;
  border-radius: var(--radius-sm);
  box-shadow: 0 18px 40px rgba(8, 20, 52, 0.15);
}

.formula-box {
  background: linear-gradient(
    160deg,
    rgba(var(--color-teal-500-rgb), 0.12),
    rgba(var(--color-orange-500-rgb), 0.14)
  );
  border: 1px solid rgba(var(--color-teal-500-rgb), 0.22);
  padding: var(--space-20);
  border-radius: var(--radius-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-lg);
  text-align: center;
  margin: var(--space-16) 0;
  box-shadow: 0 18px 38px rgba(9, 26, 68, 0.2);
}

.hardware-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-16) 0;
}

.hardware-table th,
.hardware-table td {
  padding: var(--space-12);
  text-align: left;
  border-bottom: 1px solid var(--color-card-border);
  font-size: var(--font-size-sm);
}

.hardware-table th {
  background: var(--color-secondary);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

.hardware-table td {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
}

.badge {
  display: inline-block;
  padding: var(--space-4) var(--space-12);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  background: linear-gradient(
    135deg,
    rgba(var(--color-teal-500-rgb), 0.18),
    rgba(var(--color-orange-500-rgb), 0.18)
  );
  color: var(--color-text);
  border: 1px solid rgba(var(--color-teal-500-rgb), 0.22);
  box-shadow: 0 8px 22px rgba(10, 24, 62, 0.16);
}

.badge.badge-success {
  background: rgba(var(--color-success-rgb), 0.15);
  border-color: var(--color-success);
  color: var(--color-success);
}

.badge.badge-warning {
  background: rgba(var(--color-warning-rgb), 0.15);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.presentation-container.footer-hidden .slide {
  height: 100vh;
}


.navigation {
  height: var(--footer-height);
  background: linear-gradient(180deg, rgba(7, 15, 32, 0.82), rgba(4, 9, 22, 0.95));
  border-top: 1px solid rgba(var(--color-teal-500-rgb), 0.16);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-24);
  box-shadow: 0 -12px 35px rgba(4, 10, 28, 0.42);
  transition: transform 0.3s ease, opacity 0.3s ease, height 0.3s ease, padding 0.3s ease, border 0.3s ease;
}

.navigation.is-hidden {
  opacity: 0;
  height: 0;
  padding: 0;
  border: none;
  pointer-events: none;
  overflow: hidden;
}

.nav-buttons {
  display: flex;
  gap: var(--space-12);
}

.btn {
  padding: var(--space-10) var(--space-20);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  border: none;
  background: linear-gradient(
    135deg,
    rgba(var(--color-teal-500-rgb), 1),
    rgba(99, 102, 241, 0.92)
  );
  color: var(--color-btn-primary-text);
  box-shadow: 0 12px 35px rgba(var(--color-teal-500-rgb), 0.3);
}

.btn:hover:not(:disabled) {
  background: linear-gradient(
    135deg,
    rgba(var(--color-teal-400-rgb), 1),
    rgba(129, 140, 248, 0.95)
  );
  transform: translateY(0px);
  box-shadow: 0 20px 55px rgba(var(--color-teal-500-rgb), 0.35);
}

/* Next button specific hover - light blue and glowing */
#nextBtn:hover:not(:disabled) {
  background: linear-gradient(
    135deg,
    rgba(56, 189, 248, 1),
    rgba(34, 211, 238, 1)
  );
  transform: translateY(0px);
  box-shadow: 0 20px 60px rgba(56, 189, 248, 0.7),
              0 0 40px rgba(56, 189, 248, 0.5),
              0 0 80px rgba(34, 211, 238, 0.4),
              inset 0 0 20px rgba(56, 189, 248, 0.2);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-secondary {
  background: linear-gradient(
    135deg,
    rgba(var(--color-teal-500-rgb), 0.12),
    rgba(255, 255, 255, 0.08)
  );
  color: var(--color-text);
  box-shadow: 0 6px 18px rgba(6, 20, 45, 0.18);
  border: 1px solid rgba(var(--color-teal-500-rgb), 0.24);
}

.btn-secondary:hover:not(:disabled) {
  background: linear-gradient(
    135deg,
    rgba(var(--color-teal-500-rgb), 0.2),
    rgba(255, 255, 255, 0.12)
  );
  box-shadow: 0 12px 28px rgba(6, 18, 45, 0.26);
}

.slide-counter {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

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

  .title-slide .slide-title {
    font-size: 62px;
  margin-bottom: var(--space-16);
}

.title-slide .slide-subtitle {
  font-size: var(--font-size-2xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.title-slide .meta-info {
  margin-top: var(--space-32);
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-16);
  margin-top: var(--space-16);
}

.architecture-box {
  background: var(--color-surface);
  border: 2px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  text-align: center;
}

.architecture-box h4 {
  color: var(--color-primary);
  margin-bottom: var(--space-12);
  font-size: var(--font-size-lg);
}

.architecture-flow {
  display: flex;
  align-items: center;
  justify-content: space-around;
  margin: var(--space-24) 0;
  flex-wrap: wrap;
  gap: var(--space-16);
}

.flow-item {
  background: var(--color-bg-1);
  padding: var(--space-16) var(--space-24);
  border-radius: var(--radius-md);
  border: 2px solid var(--color-primary);
  font-weight: var(--font-weight-semibold);
  min-width: 120px;
  text-align: center;
}

.flow-arrow {
  color: var(--color-primary);
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-24);
}

@media (max-width: 1024px) {
  .presentation-container {
    box-shadow: 0 20px 80px rgba(15, 45, 58, 0.12);
  }
}

@media (max-width: 768px) {
  .model-grid,
  .comparison-grid,
  .two-column {
    grid-template-columns: 1fr;
  }

  .slide {
    padding: var(--space-16);
  }

  .title-slide .slide-title {
    font-size: 42px;
  }

  /* Ensure navigation is visible on mobile */
  .navigation {
    display: flex !important;
    opacity: 1 !important;
    height: var(--footer-height) !important;
    padding: 0 var(--space-16) !important;
    visibility: visible !important;
    pointer-events: auto !important;
  }

  .navigation.is-hidden {
    /* Override is-hidden on mobile to keep navigation visible */
    opacity: 1 !important;
    height: var(--footer-height) !important;
    padding: 0 var(--space-16) !important;
    visibility: visible !important;
    pointer-events: auto !important;
    border: 1px solid rgba(var(--color-teal-500-rgb), 0.16) !important;
  }

  .nav-buttons {
    gap: var(--space-8);
    display: flex !important;
  }

  .btn {
    padding: var(--space-8) var(--space-16);
    font-size: var(--font-size-sm);
    min-height: 44px; /* Better touch target */
    min-width: 80px;
    display: inline-block !important;
    visibility: visible !important;
    opacity: 1 !important;
  }

  .slide-counter {
    font-size: var(--font-size-sm);
    display: block !important;
    visibility: visible !important;
  }

  /* Fix mobile layout for slides 25 & 26 - images should wrap */
  .slide[data-slide="25"] img,
  .slide[data-slide="26"] img {
    max-width: 100% !important;
    width: 100% !important;
    margin-bottom: var(--space-16);
  }

  .slide[data-slide="25"] .slide-content > div,
  .slide[data-slide="26"] .slide-content > div {
    flex-direction: column !important;
    align-items: center !important;
  }

  /* Fix mobile layout for slide 38 - QR code images should wrap */
  .slide[data-slide="38"] .two-column .section-content:last-child,
  .slide[data-slide="38"] .section-content[style*="display: flex"] {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    gap: var(--space-24) !important;
  }

  .slide[data-slide="38"] .section-content:last-child > div {
    width: 100% !important;
    max-width: 100% !important;
  }

  .slide[data-slide="38"] img {
    max-width: 100% !important;
    width: 100% !important;
  }

  /* Fix mobile layout for slide 40 - QR code images should wrap */
  .slide[data-slide="40"] .slide-content > div,
  .slide[data-slide="40"] .slide-content > div[style*="display: flex"],
  .slide[data-slide="40"] .slide-content > div[style*="justify-content"] {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    gap: var(--space-32) !important;
    justify-content: center !important;
    flex-wrap: wrap !important;
  }

  .slide[data-slide="40"] .slide-content > div > div {
    width: 100% !important;
    max-width: 100% !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    flex: 1 1 100% !important;
    margin: 0 !important;
  }

  .slide[data-slide="40"] img {
    max-width: 100% !important;
    width: auto !important;
    height: auto !important;
    max-height: 400px !important;
    display: block !important;
  }
}

@media (prefers-color-scheme: dark) {
  .presentation-container {
    background: linear-gradient(175deg, rgba(10, 16, 30, 0.92), rgba(4, 9, 22, 0.96));
    border: 1px solid rgba(var(--color-teal-500-rgb), 0.26);
    box-shadow: 0 40px 140px rgba(0, 0, 0, 0.45);
  }

  .presentation-container::before {
    background: linear-gradient(
        135deg,
        rgba(var(--color-teal-500-rgb), 0.24),
        rgba(var(--color-orange-500-rgb), 0.18) 52%,
        rgba(129, 140, 248, 0.28)
      );
    mix-blend-mode: screen;
  }

  .model-card,
  .section-content {
    background: linear-gradient(
      185deg,
      rgba(10, 19, 36, 0.9),
      rgba(6, 14, 28, 0.9)
    );
    border: 1px solid rgba(var(--color-teal-500-rgb), 0.28);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.32);
  }

  .highlight-box {
    background: linear-gradient(
      135deg,
      rgba(var(--color-teal-500-rgb), 0.18),
      rgba(var(--color-orange-400-rgb), 0.22)
    );
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
  }

  .formula-box {
    background: linear-gradient(
      160deg,
      rgba(var(--color-teal-500-rgb), 0.22),
      rgba(var(--color-orange-500-rgb), 0.24)
    );
    border: 1px solid rgba(var(--color-teal-500-rgb), 0.36);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.32);
  }

  .navigation {
    background: linear-gradient(180deg, rgba(2, 9, 20, 0.92), rgba(2, 6, 14, 0.96));
    border-top: 1px solid rgba(var(--color-teal-500-rgb), 0.32);
    box-shadow: 0 -12px 45px rgba(0, 0, 0, 0.45);
  }

  .btn-secondary {
    background: linear-gradient(
      135deg,
      rgba(var(--color-teal-500-rgb), 0.24),
      rgba(14, 23, 38, 0.75)
    );
    color: rgba(224, 229, 246, 0.95);
    border: 1px solid rgba(var(--color-teal-500-rgb), 0.4);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.35);
  }

  .btn-secondary:hover:not(:disabled) {
    background: linear-gradient(
      135deg,
      rgba(var(--color-teal-500-rgb), 0.32),
      rgba(19, 32, 50, 0.85)
    );
  }

  .badge {
    background: linear-gradient(
      135deg,
      rgba(var(--color-teal-500-rgb), 0.28),
      rgba(var(--color-orange-500-rgb), 0.32)
    );
    color: rgba(229, 234, 255, 0.94);
    border: 1px solid rgba(var(--color-teal-500-rgb), 0.5);
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.3);
  }
}


::marker  {
  display: none;
}

a {
  color: #fff !important;
  font-weight: bold;
}