:root {
  --bg: #0f172a;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --accent-dark: #0284c7;
  --border: #1f2937;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.header {
  min-height: 100vh;
  padding: 24px;
}

.nav {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.3rem;
  color: var(--text);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 24px;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.95rem;
}

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

.menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.8rem;
  cursor: pointer;
}

.hero {
  max-width: 900px;
  margin: 130px auto 0;
}

.tag {
  color: var(--accent);
  font-weight: bold;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: clamp(2.5rem, 8vw, 5rem);
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-text {
  max-width: 720px;
  color: var(--muted);
  font-size: 1.15rem;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 20px;
  border-radius: 10px;
  font-weight: bold;
  transition: 0.2s ease;
}

.primary {
  background: var(--accent);
  color: #020617;
}

.primary:hover {
  background: var(--accent-dark);
  color: white;
}

.secondary {
  border: 1px solid var(--border);
  color: var(--text);
}

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

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 80px 24px;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 24px;
}

.section > p {
  color: var(--muted);
  max-width: 800px;
  margin-bottom: 12px;
}

.skills-grid,
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card,
.project-card {
  background: var(--card);
  border: 1px solid var(--border);
  padding: 22px;
  border-radius: 16px;
}

.card h3,
.project-card h3 {
  margin-bottom: 10px;
}

.card p,
.project-card p {
  color: var(--muted);
}

.tech {
  color: var(--accent) !important;
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.project-links {
  margin-top: 18px;
  display: flex;
  gap: 16px;
}

.project-links a {
  color: var(--accent);
  font-weight: bold;
}

.project-links a:hover {
  text-decoration: underline;
}

.achievement-list {
  list-style-position: inside;
  color: var(--muted);
}

.achievement-list li {
  margin-bottom: 12px;
}

.contact-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.contact-links a {
  color: var(--accent);
  font-weight: bold;
}

.footer {
  text-align: center;
  padding: 28px;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

/* Mobile */
@media (max-width: 768px) {
  .menu-btn {
    display: block;
  }

  .nav {
    position: relative;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 48px;
    right: 0;
    width: 220px;
    flex-direction: column;
    gap: 14px;
    background: var(--card);
    border: 1px solid var(--border);
    padding: 18px;
    border-radius: 12px;
  }

  .nav-links.show {
    display: flex;
  }

  .hero {
    margin-top: 100px;
  }

  .skills-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 1000px) {
  .skills-grid,
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 650px) {
  .skills-grid,
  .projects-grid {
    grid-template-columns: 1fr;
  }
}