:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: light dark;
  --bg: #020617;
  --bg-soft: #0b1220;
  --accent: #22c55e;
  --accent-soft: rgba(34, 197, 94, 0.1);
  --text-main: #e5e7eb;
  --text-soft: #9ca3af;
  --border-soft: #1f2937;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #020617 0, #020617 40%, #000 100%);
  color: var(--text-main);
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
  background: rgba(2, 6, 23, 0.9);
  border-bottom: 1px solid var(--border-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
}

.logo {
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
}

.nav-list a {
  font-size: 0.9rem;
  text-decoration: none;
  color: var(--text-soft);
}

.nav-list a:hover {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  margin: 4px 0;
}

.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3rem;
  padding: 4rem 1.5rem 3rem;
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.18), transparent 60%), var(--bg);
}

.hero-photo img {
  width: 260px;
  height: 260px;
  object-fit: cover;
  border-radius: 50%;
  border: 4px solid var(--accent);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
}
.hero-text {
  max-width: 640px;
}

.hero h1 {
  font-size: 2.4rem;
  margin: 0 0 0.75rem;
}

.hero p {
  margin: 0 0 1.5rem;
  color: var(--text-soft);
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--border-soft);
  font-size: 0.9rem;
  text-decoration: none;
  cursor: pointer;
}

.btn.primary {
  background: var(--accent);
  color: #022c22;
  border-color: transparent;
}

.btn.ghost {
  background: rgba(15, 23, 42, 0.7);
  color: var(--text-main);
}

.btn.small {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

.btn:hover {
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.45);
}

.section {
  padding: 3rem 1.5rem;
  border-top: 1px solid var(--border-soft);
  background: var(--bg-soft);
}

.section h2 {
  font-size: 1.6rem;
  margin: 0 0 0.75rem;
}

.section p {
  max-width: 720px;
  margin: 0 0 1rem;
  color: var(--text-soft);
}

.about-list {
  list-style: disc;
  padding-left: 1.25rem;
  margin: 0;
}

.about-list li {
  margin-bottom: 0.25rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.project-card {
  border-radius: 16px;
  border: 1px solid var(--border-soft);
  background: #020617;
  padding: 1.25rem 1.2rem 1.3rem;
}

.project-card h3 {
  margin: 0 0 0.6rem;
  font-size: 1.05rem;
}

.project-card p {
  margin: 0 0 0.8rem;
  color: var(--text-soft);
  font-size: 0.92rem;
}

.contact-link {
  text-decoration: none;
  color: var(--accent);
}

.contact-link:hover {
  text-decoration: underline;
}

.site-footer {
  text-align: center;
  padding: 1.5rem;
  border-top: 1px solid var(--border-soft);
  background: #020617;
  font-size: 0.8rem;
  color: var(--text-soft);
}

/* Responsive */

@media (max-width: 720px) {
  .hero {
    flex-direction: column;
    text-align: center;
  }

  .hero-photo img {
    width: 140px;
    height: 140px;
    margin-top: 1rem;
  }
  
  .site-header {
    padding-inline: 1rem;
  }

  .nav-toggle {
    display: block;
  }

  .nav-list {
    position: absolute;
    top: 56px;
    right: 0;
    flex-direction: column;
    background: rgba(15, 23, 42, 0.98);
    padding: 0.75rem 1rem 1rem;
    border-left: 1px solid var(--border-soft);
    border-bottom: 1px solid var(--border-soft);
    display: none;
  }

  .nav-list.open {
    display: flex;
  }

  .hero {
    padding-top: 3.25rem;
  }

  .hero h1 {
    font-size: 2rem;
  }
}