:root {
  --bg: #0f1117;
  --panel: #171a23;
  --border: #262a36;
  --text: #e6e8ef;
  --muted: #8b8fa3;
  --accent: #6366f1;
  --accent2: #22d3ee;
  --radius: 12px;
}

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

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Navbar */
nav {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(15, 17, 23, 0.92);
  backdrop-filter: blur(8px);
  z-index: 100;
}

.nav-inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 1.1rem;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  gap: 28px;
  font-size: 0.92rem;
  color: var(--muted);
}

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

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.4rem;
  cursor: pointer;
}

/* Hero */
.hero {
  padding: 100px 0 70px;
  text-align: center;
}

.hero h1 {
  font-size: 2.6rem;
  margin-bottom: 12px;
}

.hero .highlight {
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin: 0 auto 28px;
}

.btn-group {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 11px 22px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid var(--border);
  transition: transform 0.15s, opacity 0.2s;
}

.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--accent); color: white; border: none; }
.btn-secondary { background: var(--panel); color: var(--text); }

/* Section titles */
.section-title {
  font-size: 1.6rem;
  margin-bottom: 6px;
}
.section-sub {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 32px;
}

/* Cards */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 60px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.card h3 { margin-bottom: 8px; font-size: 1.1rem; }
.card p { color: var(--muted); font-size: 0.9rem; margin-bottom: 14px; }

.tag {
  display: inline-block;
  background: #1e2130;
  color: var(--accent2);
  font-size: 0.75rem;
  padding: 3px 9px;
  border-radius: 5px;
  margin: 0 6px 6px 0;
}

.card-links {
  display: flex;
  gap: 14px;
  margin-top: 14px;
  font-size: 0.85rem;
}
.card-links a { color: var(--accent2); font-weight: 600; }
.card-links a:hover { text-decoration: underline; }

/* Skills */
.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}
.skill-pill {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.88rem;
}

/* Timeline (About page) */
.timeline-item {
  border-left: 2px solid var(--border);
  padding-left: 20px;
  margin-bottom: 24px;
  position: relative;
}
.timeline-item::before {
  content: '';
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  position: absolute;
  left: -6px;
  top: 4px;
}
.timeline-item h4 { font-size: 1rem; margin-bottom: 4px; }
.timeline-item span { color: var(--muted); font-size: 0.82rem; }
.timeline-item p { color: var(--muted); font-size: 0.9rem; margin-top: 6px; }

/* Contact form */
.contact-form {
  max-width: 500px;
  margin: 0 auto 60px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}
.form-group input, .form-group textarea {
  width: 100%;
  background: #0f1117;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.92rem;
}
.form-group textarea { resize: vertical; min-height: 100px; }

.contact-info {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
  margin-bottom: 40px;
  color: var(--muted);
  font-size: 0.9rem;
}
.contact-info a { color: var(--accent2); }

footer {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 30px 0;
  border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px 24px;
    gap: 16px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .menu-toggle { display: block; }
  .hero h1 { font-size: 2rem; }
}