/* ==========================================================================
   BASE & DESIGN TOKENS — GAGAN BHATIA PORTFOLIO
   ========================================================================== */

/* Self-Hosted Fonts */
@font-face {
  font-family: 'Instrument Serif';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('/assets/fonts/instrument-serif.woff2') format('woff2');
}

@font-face {
  font-family: 'Instrument Serif';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('/assets/fonts/instrument-serif-italic.woff2') format('woff2');
}

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url('/assets/fonts/inter.woff2') format('woff2');
}

/* CSS Variables */
:root {
  /* Colors */
  --color-ink: #0B0B0C;
  --color-ink-rgb: 11, 11, 12;
  --color-ivory: #F5F0E8;
  --color-ivory-rgb: 245, 240, 232;
  --color-gold: #C9A66B;
  --color-gold-rgb: 201, 166, 107;
  --color-gold-hover: #dfbc80;
  --color-muted: #A7A29A;
  --color-muted-dark: #6e6b66;
  --color-surface: #141416;
  --color-surface-hover: #1b1b1e;
  --color-surface-glass: rgba(20, 20, 22, 0.72);
  --color-border: rgba(245, 240, 232, 0.12);
  --color-border-gold: rgba(201, 166, 107, 0.3);

  /* Fonts */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Spacing */
  --space-unit: 8px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-2xl: 96px;
  --space-3xl: 144px;

  /* Layout */
  --container-max: 1320px;
  --container-padding: clamp(20px, 4vw, 48px);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  /* Header */
  --nav-height: 84px;
  --nav-height-scrolled: 64px;

  /* Transitions */
  --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease-smooth);
  --transition-base: 0.35s var(--ease-smooth);
  --transition-slow: 0.65s var(--ease-smooth);
}

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

html {
  font-size: 16px;
  background-color: var(--color-ink);
  color: var(--color-ivory);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: auto; /* Managed by Lenis */
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  line-height: 1.6;
  background-color: var(--color-ink);
  color: var(--color-ivory);
  overflow-x: hidden;
  position: relative;
}

/* Accessibility: Skip Link */
.skip-link {
  position: absolute;
  top: -999px;
  left: 20px;
  background: var(--color-gold);
  color: var(--color-ink);
  font-weight: 600;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  z-index: 9999;
  text-decoration: none;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 20px;
  outline: 3px solid var(--color-ivory);
}

/* Focus States */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
}

/* Selection */
::selection {
  background-color: var(--color-gold);
  color: var(--color-ink);
}

/* Typography Defaults */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--color-ivory);
}

p {
  color: var(--color-muted);
  font-size: 1.0625rem;
  line-height: 1.7;
}

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

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

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Section Spacing */
.section {
  padding-top: clamp(80px, 10vw, 160px);
  padding-bottom: clamp(80px, 10vw, 160px);
  position: relative;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.section-label::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--color-gold);
  border-radius: 50%;
}

.section-title {
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  line-height: 1.06;
  color: var(--color-ivory);
  margin-bottom: var(--space-md);
}

.section-title em {
  font-style: italic;
  font-family: var(--font-display);
  color: var(--color-gold);
}

.section-desc {
  max-width: 640px;
  font-size: clamp(1.0625rem, 1.4vw, 1.25rem);
  line-height: 1.65;
  color: var(--color-muted);
}

/* Dividers */
.divider {
  border: 0;
  height: 1px;
  background: var(--color-border);
  width: 100%;
}

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