:root {
  --bg: #0f1115;
  --card: #171a21;
  --text: #e8e9ec;
  --muted: #8b909c;
  --accent: #5eead4;
  --border: #262a33;
  --danger: #f87171;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  line-height: 1.5;
}

a { color: inherit; }

/* --- Navbar --- */
.site-navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 28px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}

.site-navbar .brand {
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a:hover { color: var(--text); }

.nav-search input {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 0.85rem;
}

/* --- Layout --- */
.site-main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 30px 20px 80px;
}

.hero {
  text-align: center;
  padding: 60px 0 40px;
}

.hero h1 { font-size: 2.2rem; margin: 0 0 10px; }
.hero p { color: var(--muted); margin: 0; }

/* --- Filters --- */
.filters {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.filters a {
  border: 1px solid var(--border);
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 20px;
  text-decoration: none;
  font-size: 0.9rem;
}

.filters a.active { border-color: var(--accent); color: var(--accent); }

/* --- Project grid/cards --- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s ease;
}

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

.type-tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
}

.project-card h3 { margin: 0; font-size: 1.15rem; }
.project-card p { color: var(--muted); font-size: 0.9rem; margin: 0; }

.empty-state { color: var(--muted); text-align: center; grid-column: 1 / -1; }

/* --- Project detail --- */
.project-detail h1 { margin-bottom: 4px; }
.project-detail .tech-stack { color: var(--accent); font-size: 0.85rem; margin: 0 0 16px; }
.project-detail .summary { color: var(--muted); font-size: 1.05rem; }
.project-detail .description { margin: 24px 0; }
.project-detail .meta { color: var(--muted); font-size: 0.85rem; }

.live-demo { margin: 24px 0; }
.live-demo iframe {
  width: 100%;
  height: 600px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
}

.demo-btn {
  display: inline-block;
  background: var(--accent);
  color: #0f1115;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 8px;
  text-decoration: none;
  margin: 20px 0;
}

/* --- Forms (contact page) --- */
form input, form textarea, form button {
  width: 100%;
  padding: 10px;
  margin-bottom: 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-family: inherit;
}

form button {
  background: var(--accent);
  color: #0f1115;
  font-weight: 600;
  cursor: pointer;
  border: none;
}

.error { color: var(--danger); }
.success { color: var(--accent); }

/* --- Footer --- */
.site-footer {
  text-align: center;
  padding: 30px;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}