/* ============================================================
   CSS CUSTOM PROPERTIES (from portrait/)
   ============================================================ */
:root {
  --bg-primary: #0a0a0a;
  --bg-card: #141414;
  --bg-card-hover: #1a1a1a;
  --text-primary: #f0f0f0;
  --text-secondary: #a0a0a0;
  --text-muted: #666;
  --accent-start: #f2709c;
  --accent-end: #ff9472;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  /* Gradients for card placeholders */
  --gradient-tea: linear-gradient(135deg, #f59e0b, #d97706);
  --gradient-gallery: linear-gradient(135deg, #14b8a6, #3b82f6);
  --gradient-portfolio: linear-gradient(135deg, #8b5cf6, #ec4899);
  --gradient-portrait: linear-gradient(135deg, #f43f5e, #fb923c);

  /* Level badge colors */
  --color-beginner: #22c55e;
  --color-intermediate: #3b82f6;
  --color-advanced: #f59e0b;
  --color-expert: #ef4444;

  /* Spacing */
  --section-width: calc(min(80rem, 90%));
  --card-radius: 0.75rem;

  /* Transitions */
  --transition-fast: 0.3s ease;
  --transition-medium: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-primary);
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* ============================================================
   BACKGROUND WATERMARK (from portrait/)
   ============================================================ */
.bg-watermark {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: rgba(255, 255, 255, 0.02);
  font-size: clamp(6rem, 1rem + 15vw, 18rem);
  font-weight: 900;
  z-index: 0;
  user-select: none;
  letter-spacing: 0.5rem;
  white-space: nowrap;
  pointer-events: none;
}

/* ============================================================
   LANDING PAGE
   ============================================================ */
.landing {
  position: relative;
  z-index: 1;
  width: var(--section-width);
  margin: 0 auto;
  padding: 4rem 0;
}

/* ============================================================
   HEADER — Gradient text (from gallery/)
   ============================================================ */
.landing-header {
  text-align: center;
  margin-bottom: 4rem;
  animation: fadeInDown 0.6s ease;
}

.landing-title {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 300;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  background: linear-gradient(135deg, var(--text-primary), var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.landing-subtitle {
  font-size: clamp(0.9rem, 1.5vw, 1.15rem);
  color: var(--text-secondary);
  margin-top: 1rem;
  letter-spacing: 0.05em;
}

/* ============================================================
   PROJECT GRID — 2x2 (from portrait/ CSS Grid)
   ============================================================ */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

/* ============================================================
   PROJECT CARD
   ============================================================ */
.project-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--card-radius);
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  animation: fadeInUp 0.6s ease backwards;
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }
.project-card:nth-child(4) { animation-delay: 0.4s; }

.project-card:hover {
  transform: translateY(-4px) scale(1.02);
  border-color: var(--border-hover);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* ============================================================
   CARD IMAGE — Abstract gradient placeholders
   ============================================================ */
.card-image {
  position: relative;
  height: 12rem;
  overflow: hidden;
}

.tea-gradient { background: var(--gradient-tea); }
.gallery-gradient { background: var(--gradient-gallery); }
.portfolio-gradient { background: var(--gradient-portfolio); }
.portrait-gradient { background: var(--gradient-portrait); }

/* Hover overlay (from gallery/) */
.card-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

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

.overlay-text {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
}

/* ============================================================
   CARD CONTENT
   ============================================================ */
.card-content {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Level badge */
.level-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 2rem;
  width: fit-content;
}

.level-badge.beginner {
  color: var(--color-beginner);
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.level-badge.intermediate {
  color: var(--color-intermediate);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.level-badge.advanced {
  color: var(--color-advanced);
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
}

.level-badge.expert {
  color: var(--color-expert);
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.card-content h2 {
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: color var(--transition-fast);
}

.project-card:hover .card-content h2 {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-content p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ============================================================
   FOOTER
   ============================================================ */
.landing-footer {
  text-align: center;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
}

.landing-footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
  letter-spacing: 0.03em;
}

/* ============================================================
   ANIMATIONS (from gallery/ lightbox)
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* ============================================================
   RESPONSIVE — Tablet (800px)
   ============================================================ */
@media (max-width: 800px) {
  .project-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .card-image {
    height: 10rem;
  }

  .landing {
    padding: 3rem 0;
  }

  .landing-header {
    margin-bottom: 3rem;
  }
}

/* ============================================================
   RESPONSIVE — Mobile (500px)
   ============================================================ */
@media (max-width: 500px) {
  .card-image {
    height: 8rem;
  }

  .card-content {
    padding: 1.25rem;
  }

  .card-content h2 {
    font-size: 1.1rem;
  }

  .card-content p {
    font-size: 0.8rem;
  }

  .bg-watermark {
    letter-spacing: 0.2rem;
  }
}