/* ============================================
   QUIZNAT.COM — LANDING PAGE
   AAA-Grade Architecture
   ============================================ */

/* ============================================
   DESIGN TOKENS
   ============================================ */

:root {
  /* Colors - Light Theme */
  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-muted: #666666;
  --color-border: #E0E0E0;
  --color-accent: #3B82F6;
  --color-accent-hover: #2563EB;
  
  /* Project-specific colors */
  --color-design: #8B5CF6;
  --color-game: #10B981;
  --color-casual: #F59E0B;
  --color-incremental: #06B6D4;
  
  /* Status colors */
  --color-status-live: #10B981;
  --color-status-wip: #F59E0B;
  --color-status-planned: #6B7280;
  
  /* Spacing */
  --spacing-1: 0.25rem;  /* 4px */
  --spacing-2: 0.5rem;   /* 8px */
  --spacing-3: 0.75rem;  /* 12px */
  --spacing-4: 1rem;     /* 16px */
  --spacing-5: 1.5rem;   /* 24px */
  --spacing-6: 2rem;     /* 32px */
  --spacing-8: 3rem;     /* 48px */
  --spacing-10: 4rem;    /* 64px */
  --spacing-12: 6rem;    /* 96px */
  
  /* Typography */
  --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
  
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 2rem;      /* 32px */
  --font-size-4xl: 2.5rem;    /* 40px */
  --font-size-5xl: 3.5rem;    /* 56px */
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  
  --letter-spacing-tight: -0.02em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  
  /* Effects */
  --radius-sm: 0.25rem;  /* 4px */
  --radius-md: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;  /* 12px */
  --radius-xl: 1rem;     /* 16px */
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --color-bg: #0A0A0A;
  --color-surface: #1A1A1A;
  --color-text: #F5F5F5;
  --color-text-muted: #A0A0A0;
  --color-border: #2A2A2A;
  --color-accent: #60A5FA;
  --color-accent-hover: #3B82F6;
}

/* ============================================
   RESET & BASE
   ============================================ */

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

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background: var(--color-bg);
}

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

/* ============================================
   LAYOUT
   ============================================ */

.site-layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: var(--spacing-6);
}

.site-main {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-8) 0;
}

/* ============================================
   HERO
   ============================================ */

.hero {
  text-align: center;
  margin-bottom: var(--spacing-12);
}

.site-title {
  font-family: var(--font-display);
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-3);
  color: var(--color-text);
}

.site-tagline {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-normal);
  letter-spacing: var(--letter-spacing-normal);
}

/* ============================================
   PROJECT GRID
   ============================================ */

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-6);
  width: 100%;
}

/* ============================================
   PROJECT CARDS
   ============================================ */

.project-card {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-accent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.project-card:hover {
  border-color: var(--card-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.project-card--design {
  --card-accent: var(--color-design);
}

.project-card--game {
  --card-accent: var(--color-game);
}

.project-card--casual {
  --card-accent: var(--color-casual);
}

.project-card--incremental {
  --card-accent: var(--color-incremental);
}

/* Card Header */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-4);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-text);
}

/* Status Badge */
.card-status {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  background: var(--color-status-live);
  color: white;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.card-status--wip {
  background: var(--color-status-wip);
}

.card-status--planned {
  background: var(--color-status-planned);
}

/* Card Content */
.card-description {
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-5);
  flex-grow: 1;
}

/* Tags */
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
}

.tag {
  display: inline-block;
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  letter-spacing: var(--letter-spacing-normal);
}

/* ============================================
   FOOTER
   ============================================ */

.site-footer {
  text-align: center;
  padding: var(--spacing-8) 0 var(--spacing-6);
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-12);
}

.footer-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-normal);
  margin-bottom: var(--spacing-2);
}

.footer-text:last-child {
  margin-bottom: 0;
}

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

@media (max-width: 768px) {
  .site-title {
    font-size: var(--font-size-4xl);
  }
  
  .site-tagline {
    font-size: var(--font-size-lg);
  }
  
  .project-grid {
    grid-template-columns: 1fr;
  }
  
  .site-layout {
    padding: var(--spacing-4);
  }
  
  .site-main {
    padding: var(--spacing-6) 0;
  }
}

@media (max-width: 480px) {
  .site-title {
    font-size: var(--font-size-3xl);
  }
  
  .card-title {
    font-size: var(--font-size-xl);
  }
}