/* ============================================
   DESIGN SYSTEM - Global Styles & Variables
   ============================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,400;0,700;1,400;1,700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  /* Colors - Dark Theme */
  --bg-primary: #0A0A0F;
  --bg-secondary: #0c0c2d;
  --bg-tertiary: #111140;
  --bg-card: rgba(17, 17, 64, 0.5);
  --bg-card-hover: rgba(25, 25, 80, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-glass-border: rgba(255, 255, 255, 0.06);

  /* Accent Colors */
  --accent-primary: #5A94F5;
  --accent-primary-hover: #74a6f7;
  --accent-secondary: #8db8f9;
  --accent-glow: rgba(90, 148, 245, 0.15);
  --accent-glow-strong: rgba(90, 148, 245, 0.3);

  /* Text Colors */
  --text-primary: #f0f0f8;
  --text-secondary: #a0a0c0;
  --text-tertiary: #6a6a8e;
  --text-accent: var(--accent-primary);

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.1);
  --border-accent: rgba(90, 148, 245, 0.3);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;

  /* Font Sizes (fluid) */
  --fs-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --fs-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --fs-base: clamp(1rem, 0.9rem + 0.45vw, 1.125rem);
  --fs-md: clamp(1.125rem, 1rem + 0.55vw, 1.25rem);
  --fs-lg: clamp(1.25rem, 1.1rem + 0.7vw, 1.5rem);
  --fs-xl: clamp(1.5rem, 1.2rem + 1.3vw, 2rem);
  --fs-2xl: clamp(2rem, 1.5rem + 2.2vw, 3rem);
  --fs-3xl: clamp(2.5rem, 1.8rem + 3vw, 4rem);
  --fs-4xl: clamp(3rem, 2rem + 4vw, 5.5rem);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 50%;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --transition-fast: 0.2s var(--ease-out);
  --transition-base: 0.3s var(--ease-out);
  --transition-slow: 0.5s var(--ease-out);
  --transition-slower: 0.8s var(--ease-out);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px var(--accent-glow);
  --shadow-glow-strong: 0 0 60px var(--accent-glow-strong);

  /* Layout */
  --container-max: 1200px;
  --container-wide: 1400px;
  --navbar-height: 80px;
}

/* --- CSS Reset --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  min-height: 100vh;
}

/* Fix for smooth page transitions */
body.no-scroll {
  overflow: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: var(--fs-4xl); }
h2 { font-size: var(--fs-3xl); }
h3 { font-size: var(--fs-2xl); }
h4 { font-size: var(--fs-xl); }
h5 { font-size: var(--fs-lg); }
h6 { font-size: var(--fs-md); }

/* Accent italic text (serif) */
.text-accent-italic {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--accent-primary);
}

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

p {
  color: var(--text-secondary);
  max-width: 65ch;
}

/* --- Layout Utilities --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-wide {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: var(--space-lg);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
}

.section-title {
  margin-bottom: var(--space-xl);
}

/* --- Scroll Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* --- Page Transition Overlay --- */
.page-transition {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  z-index: 10000;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s var(--ease-in-out);
}

.page-transition.active {
  opacity: 1;
  pointer-events: all;
}

/* --- Page Load Animation --- */
.page-content {
  animation: pageEnter 0.6s var(--ease-out) forwards;
}

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

/* --- Selection Color --- */
::selection {
  background: var(--accent-primary);
  color: white;
}

/* --- Scrollbar Styling --- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

/* --- Responsive Breakpoints --- */
@media (max-width: 768px) {
  .container,
  .container-wide {
    padding: 0 var(--space-lg);
  }

  .section {
    padding: var(--space-3xl) 0;
  }
}

@media (max-width: 480px) {
  .container,
  .container-wide {
    padding: 0 var(--space-md);
  }
}