@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================================
   DESIGN TOKENS & ROOT CSS VARIABLES
   ============================================================ */
:root {
  /* Color Palette - Cobalt Sky Theme */
  --bg-dark: #1a1f2e;
  --bg-light: #2a3142;
  --bg-card: #353d52;
  --bg-hover: #3d4661;
  --accent-primary: #0047AB;
  --accent-warm: #82C8E5;
  --accent-secondary: #82C8E5;
  --accent-tertiary: #6D8196;
  --text-primary: #ffffff;
  --text-secondary: #c8dce8;
  --text-tertiary: #6D8196;
  --border-light: rgba(130, 200, 229, 0.2);
  --border-medium: rgba(130, 200, 229, 0.35);

  /* Legacy alias for inline style compatibility */
  --accent: var(--accent-primary);
  --radius: var(--radius-lg);

  /* Gradients */
  --grad-bg: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-light) 100%);
  --grad-accent: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-tertiary) 100%);
  --grad-card-border: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-tertiary) 100%);
  --grad-text-hero: linear-gradient(to right, var(--text-primary) 0%, var(--accent-warm) 100%);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  --spacing-4xl: 5rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 99999px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow-gold: 0 0 20px rgba(0, 71, 171, 0.4);
  --shadow-glow-cyan: 0 0 20px rgba(130, 200, 229, 0.3);
  --shadow-glow-purple: 0 0 20px rgba(109, 129, 150, 0.25);

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;
  --font-size-6xl: 4.5rem;

  /* Line Height */
  --leading-tight: 1.2;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index */
  --z-dropdown: 10;
  --z-sticky: 20;
  --z-fixed: 30;
  --z-modal: 40;
  --z-tooltip: 50;
}

/* ============================================================
   GLOBAL RESET & BASE STYLES
   ============================================================ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: var(--grad-bg);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* Grain texture overlay for depth */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background-image:
    url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' seed='2' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.03'/%3E%3C/svg%3E");
  opacity: 0.4;
  z-index: 1;
}

/* Ensure content appears above grain */
body > * {
  position: relative;
  z-index: 2;
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  line-height: var(--leading-tight);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2rem, 8vw, var(--font-size-6xl));
  letter-spacing: -0.02em;
  font-weight: 800;
}

h2 {
  font-size: clamp(1.5rem, 5vw, var(--font-size-4xl));
  letter-spacing: -0.01em;
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

strong {
  color: var(--text-primary);
  font-weight: 600;
}

a {
  color: var(--accent-warm);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ============================================================
   ANIMATIONS
   ============================================================ */

/* Fade In */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.animate-fade-in {
  animation: fadeIn 0.8s ease-out forwards;
}

/* Slide Up */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(1.5rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-slide-up {
  animation: slideUp 0.8s ease-out forwards;
  opacity: 0;
}

/* Float */
@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-12px);
  }
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

/* Shimmer - text gradient shimmer for hero */
@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.shimmer {
  background: linear-gradient(
    90deg,
    var(--text-primary) 0%,
    var(--accent-warm) 50%,
    var(--text-primary) 100%
  );
  background-size: 1000px 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 3s ease-in-out infinite;
}

/* Pulse Glow - pulsing glow for CTA buttons */
@keyframes pulseGlow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(0, 71, 171, 0.5), 0 0 40px rgba(0, 71, 171, 0.2);
  }
  50% {
    box-shadow: 0 0 30px rgba(0, 71, 171, 0.7), 0 0 60px rgba(0, 71, 171, 0.3);
  }
}

.pulse-glow {
  animation: pulseGlow 2s ease-in-out infinite;
}

/* Border Rotate - animated gradient border */
@keyframes borderRotate {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

.border-rotate {
  position: relative;
  animation: borderRotate 4s ease infinite;
}

.border-rotate::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 2px;
  background: var(--grad-card-border);
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0.8;
}

/* Animation Delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-sm {
  max-width: 800px;
}

.container-lg {
  max-width: 1400px;
}

main {
  flex: 1;
  position: relative;
  z-index: 2;
}

/* ============================================================
   HEADER & NAVIGATION
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(26, 31, 46, 0.85);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition-base);
}

.site-header.scrolled {
  background: rgba(26, 31, 46, 0.95);
  border-bottom-color: var(--border-medium);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  height: 60px;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--grad-accent);
  font-weight: 800;
  font-size: 1.25rem;
  color: #ffffff;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  box-shadow: var(--shadow-glow-gold);
}

.logo:hover {
  transform: scale(1.08) rotate(3deg);
  box-shadow: 0 0 30px rgba(0, 71, 171, 0.7);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link svg {
  flex-shrink: 0;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.08);
}

.nav-link.active {
  color: #82C8E5;
  background: rgba(130, 200, 229, 0.15);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--spacing-3xl);
  align-items: center;
}

.hero-text h1 {
  background: var(--grad-text-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--spacing-xl);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 36rem;
  margin-bottom: var(--spacing-xl);
  line-height: var(--leading-relaxed);
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-2xl);
}

.hero-side {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ============================================================
   BUTTONS & CTAs
   ============================================================ */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  gap: var(--spacing-sm);
}

.button.primary {
  background: var(--grad-accent);
  color: #ffffff;
  box-shadow: var(--shadow-glow-gold);
  font-weight: 700;
}

.button.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 71, 171, 0.5);
  filter: brightness(1.1);
}

.button.primary.pulse-glow {
  animation: pulseGlow 2s ease-in-out infinite;
}

.button.secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

.button.secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--accent-secondary);
  color: var(--accent-secondary);
}

.button.tertiary {
  background: transparent;
  color: var(--accent-primary);
  border: 1px solid var(--border-medium);
}

.button.tertiary:hover {
  background: rgba(0, 71, 171, 0.1);
  border-color: var(--accent-primary);
}

.button.small {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-xs);
}

.button.large {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-base);
}

.button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* External Link Button */
.external-link-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(130, 200, 229, 0.1);
  border: 1px solid rgba(130, 200, 229, 0.4);
  border-radius: var(--radius-md);
  color: #82C8E5;
  font-weight: 500;
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.external-link-btn:hover {
  background: rgba(130, 200, 229, 0.2);
  border-color: #82C8E5;
  transform: translateX(2px);
}

/* ============================================================
   CARDS & CONTAINERS
   ============================================================ */
.card {
  background: rgba(53, 61, 82, 0.6);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, rgba(0, 71, 171, 0), rgba(109, 129, 150, 0));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.card:hover::before {
  opacity: 1;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-medium);
  background: rgba(53, 61, 82, 0.8);
  box-shadow: var(--shadow-md);
}

.card h2,
.card h3 {
  color: var(--text-primary);
  margin-top: 0;
}

.card p {
  color: var(--text-secondary);
}

.card-featured {
  background: linear-gradient(135deg, rgba(0, 71, 171, 0.1), rgba(109, 129, 150, 0.05));
  border: 1px solid rgba(0, 71, 171, 0.2);
}

.card-featured:hover {
  border-color: rgba(0, 71, 171, 0.4);
  background: linear-gradient(135deg, rgba(0, 71, 171, 0.15), rgba(109, 129, 150, 0.08));
}

/* ============================================================
   HOBBY CARDS & GRID
   ============================================================ */
.hobby-card {
  background: rgba(53, 61, 82, 0.5);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.hobby-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: var(--grad-card-border);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.hobby-card:hover::before {
  opacity: 0.8;
}

.hobby-card:hover {
  transform: translateY(-6px);
  background: rgba(53, 61, 82, 0.7);
  box-shadow: var(--shadow-glow-gold);
}

.hobby-icon {
  width: 56px;
  height: 56px;
  margin-bottom: var(--spacing-md);
  background: rgba(130, 200, 229, 0.4);
  border: 2px solid #82C8E5;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: #ffffff;
  transition: all var(--transition-base);
}

.hobby-card:hover .hobby-icon {
  background: #82C8E5;
  border-color: #82C8E5;
  transform: scale(1.1);
  box-shadow: 0 0 25px rgba(130, 200, 229, 0.6);
  color: #1a1f2e;
}

.hobby-title {
  color: var(--text-primary);
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.hobby-description {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--spacing-md);
  flex-grow: 1;
}

.hobby-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.hobby-link {
  margin-top: auto;
}

.hobby-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.hobby-grid .hobby-card {
  flex: 0 1 calc(33.333% - var(--spacing-lg));
  min-width: 280px;
}

/* ============================================================
   HERO - HOBBIES PAGE
   ============================================================ */
.hobby-hero {
  padding: var(--spacing-xl) 0 var(--spacing-lg);
  text-align: center;
}

.hobby-hero h1 {
  background: var(--grad-text-hero);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--spacing-md);
}

.hobby-hero p {
  max-width: 600px;
  margin: 0 auto;
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
}

/* ============================================================
   TAGS
   ============================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(130, 200, 229, 0.15);
  border: 1px solid rgba(130, 200, 229, 0.3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  color: var(--accent-secondary);
  font-weight: 500;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.tag:hover {
  background: rgba(130, 200, 229, 0.25);
  border-color: var(--accent-secondary);
}

.tag.gold {
  background: rgba(0, 71, 171, 0.15);
  border-color: rgba(0, 71, 171, 0.3);
  color: var(--accent-primary);
}

.tag.gold:hover {
  background: rgba(0, 71, 171, 0.25);
  border-color: var(--accent-primary);
}

.tag.purple {
  background: rgba(109, 129, 150, 0.15);
  border-color: rgba(109, 129, 150, 0.3);
  color: var(--accent-tertiary);
}

.tag.purple:hover {
  background: rgba(109, 129, 150, 0.25);
  border-color: var(--accent-tertiary);
}

/* ============================================================
   SECTION DIVIDER
   ============================================================ */
.section-divider {
  height: 1px;
  background: var(--grad-card-border);
  opacity: 0.5;
  margin: var(--spacing-lg) 0;
  position: relative;
}

.section-divider::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 40px;
  height: 2px;
  background: var(--grad-accent);
  border-radius: var(--radius-full);
}

/* ============================================================
   ABOUT SECTION
   ============================================================ */
.about-section {
  background: linear-gradient(135deg, rgba(0, 71, 171, 0.05), rgba(109, 129, 150, 0.05));
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-2xl);
  margin: var(--spacing-3xl) 0;
}

.about-section h3 {
  color: var(--accent-primary);
  margin-bottom: var(--spacing-md);
}

.about-section p {
  color: var(--text-secondary);
  line-height: var(--leading-relaxed);
}

.traits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.trait-item {
  background: rgba(0, 71, 171, 0.1);
  border: 1px solid rgba(0, 71, 171, 0.2);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.trait-item:hover {
  background: rgba(0, 71, 171, 0.15);
  border-color: var(--accent-primary);
  color: var(--text-primary);
}

.trait-label {
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: var(--spacing-xs);
}

/* ============================================================
   GRID LAYOUTS
   ============================================================ */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.grid.tight {
  gap: var(--spacing-md);
}

.grid.loose {
  gap: var(--spacing-2xl);
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
  padding: var(--spacing-xl) 0;
  position: relative;
}

.section-title {
  font-size: clamp(1.5rem, 4vw, var(--font-size-4xl));
  color: var(--text-primary);
  margin-bottom: var(--spacing-xl);
  font-weight: 800;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: var(--spacing-2xl);
}

/* ============================================================
   LISTS & BULLETS
   ============================================================ */
.bullet-list {
  list-style: none;
  padding: 0;
  margin: var(--spacing-lg) 0;
}

.bullet-list li {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
  align-items: flex-start;
}

.bullet-list li::before {
  content: "→";
  color: var(--accent-primary);
  font-weight: bold;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ============================================================
   CHAT SECTION
   ============================================================ */
.chat-iframe-wrapper {
  margin-top: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
  background: rgba(53, 61, 82, 0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
}

.chat-iframe-wrapper iframe {
  width: 100%;
  height: 75vh;
  min-height: 600px;
  border: none;
  display: block;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  margin-top: auto;
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--border-light);
  text-align: center;
  color: var(--text-tertiary);
  position: relative;
  z-index: 2;
}

.footer-content {
  margin-bottom: var(--spacing-lg);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-primary);
}

.footer-credit {
  font-size: var(--font-size-xs);
  margin-top: var(--spacing-lg);
}

.footer-note {
  font-size: var(--font-size-sm);
  color: var(--text-tertiary);
  margin-top: var(--spacing-sm);
}

.section-note {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--spacing-xl);
}

/* ============================================================
   RESPONSIVE DESIGN
   ============================================================ */

/* Tablet (768px and below) */
@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }

  .hero {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
  }

  .hero-side {
    min-height: 300px;
  }

  .hobby-grid .hobby-card {
    flex: 0 1 calc(50% - var(--spacing-lg));
  }

  .grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }

  .traits-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .nav {
    gap: var(--spacing-xs);
  }

  .nav-link {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
  }

  .button {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-xs);
  }

  .section {
    padding: var(--spacing-lg) 0;
  }

  .section-divider {
    margin: var(--spacing-md) 0;
  }

  .about-section {
    padding: var(--spacing-xl);
  }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
  :root {
    --spacing-lg: 1rem;
    --spacing-xl: 1.5rem;
    --spacing-2xl: 2rem;
    --spacing-3xl: 2.5rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .header-content {
    padding: var(--spacing-sm) 0;
    height: 56px;
  }

  .nav {
    position: fixed;
    top: 56px;
    right: 0;
    left: 0;
    flex-direction: column;
    background: rgba(26, 31, 46, 0.98);
    border-bottom: 1px solid var(--border-light);
    border-top: 1px solid var(--border-light);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
    z-index: var(--z-dropdown);
  }

  .nav.open {
    max-height: 400px;
    padding: var(--spacing-md) 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-link {
    padding: var(--spacing-md);
    width: 100%;
    text-align: left;
  }

  .nav-link:hover {
    background: rgba(0, 71, 171, 0.1);
  }

  h1 {
    font-size: clamp(1.75rem, 6vw, 2.5rem);
  }

  h2 {
    font-size: clamp(1.25rem, 4vw, 2rem);
  }

  .hero {
    padding: var(--spacing-lg) 0 var(--spacing-md);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
  }

  .hero-actions {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .button {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md);
  }

  .card {
    padding: var(--spacing-lg);
  }

  .hobby-card {
    padding: var(--spacing-lg);
  }

  .hobby-grid .hobby-card {
    flex: 1 1 100%;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .traits-grid {
    grid-template-columns: 1fr;
  }

  .chat-iframe-wrapper iframe {
    height: 60vh;
    min-height: 500px;
  }

  .section {
    padding: var(--spacing-md) 0;
  }

  .section-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
  }

  .section-divider {
    margin: var(--spacing-sm) 0;
  }

  .footer-links {
    gap: var(--spacing-md);
  }

  .about-section {
    padding: var(--spacing-md);
  }

  .external-link-btn {
    width: 100%;
    justify-content: center;
  }
}

/* Print Styles */
@media print {
  .site-header,
  .site-footer,
  .nav-toggle {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .card {
    page-break-inside: avoid;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: dark) {
  /* Dark mode is already the default */
}

/* High Contrast Mode */
@media (prefers-contrast: more) {
  .card {
    border-width: 2px;
  }

  .button {
    font-weight: 700;
  }

  .tag {
    border-width: 2px;
  }
}

/* Focus Visible Styles */
.button:focus-visible,
.nav-link:focus-visible,
.footer-link:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */

/* Text */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-tertiary); }
.text-accent { color: var(--accent-primary); }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }

/* Spacing */
.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.m-0 { margin: 0; }
.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }

.mt-auto { margin-top: auto; }
.mb-auto { margin-bottom: auto; }

/* Display */
.block { display: block; }
.flex { display: flex; }
.d-grid { display: grid; }
.inline-flex { display: inline-flex; }
.hidden { display: none !important; }

/* Opacity */
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }

/* Gaps */
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }