:root {
  --bg: #090c10;
  --card: #0d1117;
  --card-border: #1a1f2e;
  --card-hover-border: #3b82f6;
  --text: #e6edf3;
  --muted: #8b949e;
  --accent: #3b82f6;
  --accent2: #10b981;
  --accent3: #8b5cf6;
  --tag-bg: #161b22;
  --tag-border: #21262d;
  --btn-bg: #161b22;
  --btn-hover: #1f2937;
  --body-font: "Space Grotesk", sans-serif;
}

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

body {
  background: var(--bg);
  font-family: var(--body-font);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- NAV --- */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  background: rgba(9, 12, 16, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
}
nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.2s;
}
nav a:hover {
  color: var(--text);
}

/* --- HEADER --- */
header {
  padding: 120px 2rem 60px;
  text-align: center;
}
header h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #e6edf3 30%, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}
header p {
  color: var(--muted);
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- GRID --- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 5rem;
}

/* --- CARD --- */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition:
    border-color 0.3s,
    box-shadow 0.3s,
    transform 0.3s;
  animation: fadeUp 0.5s ease both;
}
.card:hover {
  border-color: var(--card-hover-border);
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.08);
  transform: translateY(-4px);
}

/* image area */
.card-img {
  position: relative;
  height: 200px;
  overflow: hidden;
  background: #111827;
}
.card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.card:hover .card-img img {
  transform: scale(1.05);
}

/* placeholder when no image */
.card-img .placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  background: linear-gradient(135deg, #0d1117, #161b22);
}

/* badge top-right */
.badge {
  position: absolute;
  top: 12px;
  right: 12px;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid;
}
.badge.personal {
  background: rgba(0, 0, 0, 0.8);
  border-color: #10b981;
  color: #10b981;
}
.badge.thesis {
  /* background: rgba(139, 92, 246, 0.1); */
  background: rgba(0, 0, 0, 0.8);
  border-color: #8b5cf6;
  color: #8b5cf6;
}
.badge.team {
  /* background: rgba(59, 130, 246, 0.1); */
  background: rgba(0, 0, 0, 0.8);
  border-color: #3b82f6;
  color: #3b82f6;
}
.badge.freelance {
  /* background: rgba(245, 158, 11, 0.1); */
  background: rgba(0, 0, 0, 0.8);
  border-color: #f59e0b;
  color: #f59e0b;
}

/* body */
.card-body {
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 0.75rem;
}
.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  transition: color 0.2s;
}
.card:hover .card-title {
  color: var(--accent);
}
.card-desc {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.65;
  flex: 1;
}

/* tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 6px;
  background: var(--tag-bg);
  border: 1px solid var(--tag-border);
  color: var(--muted);
}

/* footer */
.card-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--card-border);
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}
.btn {
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 7px 18px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s;
  border: 1px solid var(--tag-border);
  background: var(--btn-bg);
  color: var(--text);
}
.btn:hover {
  background: var(--btn-hover);
  border-color: var(--accent);
  color: var(--accent);
}
.btn.primary {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--accent);
  color: var(--accent);
}
.btn.primary:hover {
  background: rgba(59, 130, 246, 0.2);
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 600px) {
  .grid {
    grid-template-columns: 1fr;
    padding: 0 1rem 4rem;
  }
  header {
    padding: 100px 1rem 40px;
  }
}