/* ============================================
   Digital Zen — Editorial Design System
   ============================================ */

/* --- Design Tokens --- */
:root {
  /* Colors — Dark editorial palette */
  --color-bg-deep: #080808;
  --color-bg-surface: #0e0e0e;
  --color-bg-card: rgba(255, 255, 255, 0.04);
  --color-bg-card-hover: rgba(255, 255, 255, 0.07);
  --color-glass-border: rgba(255, 255, 255, 0.08);
  --color-glass-border-hover: rgba(255, 255, 255, 0.18);

  --color-accent-gold: #ffffff;
  --color-accent-amber: #e0e0e0;
  --color-accent-warm: #d0d0d0;
  --color-accent-glow: rgba(255, 255, 255, 0.06);
  --color-accent-glow-strong: rgba(255, 255, 255, 0.12);

  --color-text-primary: #f5f5f5;
  --color-text-secondary: rgba(245, 245, 245, 0.60);
  --color-text-muted: rgba(245, 245, 245, 0.35);
  --color-text-accent: var(--color-accent-gold);

  /* Typography */
  --font-heading: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.75rem;
  --text-5xl: 3.5rem;
  --text-6xl: 4.5rem;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Borders */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Effects */
  --blur-glass: blur(20px);
  --blur-subtle: blur(40px);
  --shadow-glow: 0 0 30px var(--color-accent-glow);
  --shadow-glow-strong: 0 0 60px var(--color-accent-glow-strong);
  --shadow-card: 0 4px 30px rgba(0, 0, 0, 0.4);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 200ms;
  --duration-normal: 400ms;
  --duration-slow: 700ms;
}

/* --- Reset & Base --- */
*, *::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-body);
  background-color: var(--color-bg-deep);
  color: var(--color-text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

/* --- Canvas Background --- */
#particles-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* --- Header / Nav --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(8, 8, 8, 0.6);
  backdrop-filter: var(--blur-glass);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background var(--duration-normal);
}

.site-header.scrolled {
  background: rgba(8, 8, 8, 0.9);
}

.header__brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.header__logo {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--color-text-accent);
}

.header__tagline {
  font-size: 0.625rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-family: var(--font-body);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.header__link {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
  transition: color var(--duration-fast);
  position: relative;
}

.header__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent-gold);
  transition: width var(--duration-normal) var(--ease-out);
}

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

.header__link:hover::after {
  width: 100%;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-5xl) var(--space-xl) var(--space-4xl);
  overflow: hidden;
}

.hero__glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  animation: pulseGlow 6s ease-in-out infinite;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-accent);
  margin-bottom: var(--space-2xl);
  backdrop-filter: var(--blur-glass);
  font-family: var(--font-body);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent-gold);
  animation: pulse 2s ease-in-out infinite;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-4xl), 8vw, var(--text-6xl));
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-xl);
  max-width: 800px;
}

.hero__title-accent {
  font-style: italic;
  background: linear-gradient(135deg, var(--color-accent-gold), var(--color-accent-warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__desc {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 520px;
  margin-bottom: var(--space-2xl);
  line-height: 1.8;
  font-weight: 300;
  font-style: italic;
}

.hero__scroll {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: float 3s ease-in-out infinite;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-accent-gold), transparent);
  animation: scrollLine 2s ease-in-out infinite;
}

/* --- Article Section --- */
.article-section {
  position: relative;
  z-index: 1;
  padding: var(--space-5xl) var(--space-xl);
  background: linear-gradient(180deg, var(--color-bg-deep) 0%, var(--color-bg-surface) 30%, var(--color-bg-surface) 70%, var(--color-bg-deep) 100%);
}

.article__container {
  max-width: 680px;
  margin: 0 auto;
}

.article__paragraph {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  line-height: 1.9;
  font-weight: 300;
  margin-bottom: var(--space-xl);
}

/* Drop cap */
.article__dropcap::first-letter {
  float: left;
  font-family: var(--font-heading);
  font-size: 4.5rem;
  line-height: 0.8;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-right: 0.15em;
  margin-top: 0.05em;
}

/* Section divider */
.article__divider {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-accent-gold), transparent);
  margin: var(--space-3xl) auto;
}

/* Section title */
.article__section-title {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-2xl);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

/* Pull quotes */
.article__pullquote {
  margin: var(--space-3xl) 0;
  padding: var(--space-xl) 0 var(--space-xl) var(--space-xl);
  border-left: 2px solid rgba(255, 255, 255, 0.15);
}

.article__pullquote p {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-xl), 3vw, var(--text-2xl));
  font-weight: 500;
  font-style: italic;
  line-height: 1.6;
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

/* Closing line emphasis */
.article__closing {
  font-style: italic;
  color: var(--color-text-primary);
  font-weight: 400;
  margin-bottom: 0;
}

/* --- Continue Reading Section --- */
.continue-section {
  position: relative;
  z-index: 1;
  padding: var(--space-5xl) var(--space-xl);
}

.continue__container {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.continue__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-accent-gold);
  margin-bottom: var(--space-md);
  font-family: var(--font-body);
}

.continue__title {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-2xl), 4vw, var(--text-3xl));
  font-weight: 600;
  margin-bottom: var(--space-3xl);
}

.continue__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
  text-align: left;
}

.continue__card {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  backdrop-filter: var(--blur-glass);
  transition: transform var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal),
              box-shadow var(--duration-normal);
}

.continue__card:hover {
  transform: translateY(-4px);
  border-color: var(--color-glass-border-hover);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}

.continue__card-label {
  display: inline-block;
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  font-family: var(--font-body);
}

.continue__card-title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.continue__card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  font-weight: 300;
  margin-bottom: var(--space-lg);
}

.continue__card-status {
  display: inline-block;
  font-size: var(--text-xs);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: 4px var(--space-sm);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
}

/* --- Sponsor Section --- */
.sponsor-section {
  position: relative;
  z-index: 1;
  padding: var(--space-3xl) var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.sponsor__container {
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.sponsor__label {
  display: inline-block;
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  font-family: var(--font-body);
}

.sponsor__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-xl);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: 0.06em;
  transition: border-color var(--duration-fast),
              color var(--duration-fast),
              transform var(--duration-fast) var(--ease-spring);
  margin-bottom: var(--space-xl);
}

.sponsor__link:hover {
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--color-text-primary);
  transform: scale(1.02);
}

.sponsor__disclosure {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.8;
  max-width: 560px;
  margin: 0 auto;
}

/* --- Site Footer --- */
.site-footer {
  position: relative;
  z-index: 1;
  padding: var(--space-xl) var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  background: var(--color-bg-surface);
}

.footer__copyright {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* --- Reveal Animation --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}

.reveal.visible {
  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; }

/* --- Keyframes --- */
@keyframes pulseGlow {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 1; }
  50% { transform: translate(-50%, -50%) scale(1.15); opacity: 0.6; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes float {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-8px); }
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .site-header {
    padding: var(--space-md) var(--space-lg);
  }

  .header__nav {
    gap: var(--space-md);
  }

  .header__link {
    display: none;
  }

  .hero {
    padding: var(--space-4xl) var(--space-lg) var(--space-3xl);
  }

  .hero__desc {
    font-size: var(--text-base);
  }

  .hero__scroll {
    display: none;
  }

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

  .article__paragraph {
    font-size: var(--text-base);
  }

  .article__dropcap::first-letter {
    font-size: 3.5rem;
  }

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

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

  .sponsor-section {
    padding: var(--space-2xl) var(--space-lg);
  }

  .site-footer {
    padding: var(--space-lg);
  }
}