:root {
  --bg: #0f172a;
  --surface: #020617;
  --card: #1e293b;
  --border: #334155;
  --text: #e5e7eb;
  --muted: #94a3b8;
  --accent: #38bdf8;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

/* HERO */
.hero {
  text-align: center;
  padding: 4rem 1.5rem;
  background: linear-gradient(135deg, #020617, #1e293b);
}

.profile-pic {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  border: 3px solid var(--accent);
  object-fit: cover;
  margin-bottom: 1.2rem;
}

.hero h1 {
  font-size: 2.8rem;
}

.hero h2 {
  color: var(--accent);
  margin-top: 0.4rem;
}

.hero p {
  max-width: 640px;
  margin: 1.5rem auto;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* BUTTONS */
.btn {
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
}

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

.outline {
  border: 1px solid var(--accent);
  color: var(--accent);
}

/* SECTIONS */
.section {
  max-width: 1000px;
  margin: auto;
  padding: 4rem 1.5rem;
}

.section.dark {
  background: var(--surface);
}

.section h3 {
  position: relative;
  display: inline-block;
  padding-bottom: 0.4rem;
}

.section h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 42px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

.section h3 {
  font-size: 2rem;
  margin-bottom: 1.8rem;
}

/* SKILLS */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.skill-card {
  background: var(--card);
  padding: 1.5rem;
  border-radius: 14px;
  border: 1px solid var(--border);
}

.skill-card h4 {
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* CARDS */
.card {
  background: var(--card);
  padding: 1.6rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.card span {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 0.6rem;
}

.card ul {
  padding-left: 1.2rem;
}

.tech {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 0.6rem;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

/* MOBILE */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }
}