/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0d1117;
  --bg-alt:    #161b22;
  --border:    #30363d;
  --text:      #e6edf3;
  --text-muted:#8b949e;
  --accent:    #58a6ff;
  --accent-dim:#1f6feb33;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --radius:    8px;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: opacity var(--transition); }
a:hover { opacity: 0.8; }

.mono { font-family: var(--font-mono); font-size: 0.85em; }
.accent { color: var(--accent); }

/* ── Navbar ── */
.navbar {
  position: fixed; top: 0; width: 100%; z-index: 100;
  background: rgba(13,17,23,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: 0 4px 24px rgba(0,0,0,0.4); }

.nav-inner {
  max-width: 1100px; margin: 0 auto;
  padding: 0 2rem;
  height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-mono); font-size: 1.2rem; font-weight: 600;
  color: var(--text); letter-spacing: -0.5px;
}

.nav-links {
  list-style: none; display: flex; gap: 2rem;
}
.nav-links a {
  color: var(--text-muted); font-size: 0.875rem; font-weight: 500;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--accent); opacity: 1; }

.nav-burger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-burger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-muted); border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  padding: 0 2rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 20% 50%, #1f6feb18 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, #388bfd0d 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  max-width: 800px; margin: 0 auto; padding-top: 80px;
}

.hero-greeting {
  color: var(--accent); margin-bottom: 1rem;
  font-size: 1rem; letter-spacing: 0.05em;
}

.hero-name {
  font-size: clamp(2.4rem, 6vw, 4.5rem);
  font-weight: 700; line-height: 1.1;
  letter-spacing: -1.5px; color: var(--text);
  margin-bottom: 0.5rem;
}

.hero-tagline {
  font-size: clamp(1.4rem, 3.5vw, 2.5rem);
  font-weight: 600; color: var(--text-muted);
  line-height: 1.2; margin-bottom: 1.5rem;
}

.hero-bio {
  max-width: 520px; color: var(--text-muted);
  font-size: 1.05rem; margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem;
}

.hero-socials {
  display: flex; gap: 1.25rem; align-items: center;
}

.social-icon-link {
  color: var(--text-muted); display: flex; align-items: center;
  transition: color var(--transition), transform var(--transition);
}
.social-icon-link:hover { color: var(--accent); opacity: 1; transform: translateY(-2px); }
.social-icon-link svg { width: 22px; height: 22px; }

.hero-scroll {
  position: absolute; bottom: 2rem; right: 3rem;
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
  color: var(--text-muted); font-size: 0.7rem; writing-mode: vertical-rl;
}
.scroll-line {
  width: 1px; height: 80px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: pulse-line 2s ease-in-out infinite;
}
@keyframes pulse-line {
  0%, 100% { opacity: 0.4; }
  50%       { opacity: 1; }
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center;
  padding: 0.7rem 1.5rem; border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 600;
  transition: all var(--transition); cursor: pointer; border: none;
}
.btn-primary {
  background: var(--accent); color: #0d1117;
}
.btn-primary:hover { background: #79b8ff; opacity: 1; }

.btn-outline {
  background: transparent; border: 1px solid var(--accent);
  color: var(--accent);
}
.btn-outline:hover { background: var(--accent-dim); opacity: 1; }

/* ── Sections ── */
.section { padding: 6rem 2rem; }
.section-alt { background: var(--bg-alt); }

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

.section-title {
  font-size: 1.75rem; font-weight: 700;
  margin-bottom: 3rem; display: flex; align-items: center; gap: 0.75rem;
}
.section-title .mono { font-size: 1rem; }
.section-title::after {
  content: '';
  flex: 1; max-width: 240px; height: 1px;
  background: var(--border); display: block;
}

/* ── About ── */
.about-grid {
  display: grid; grid-template-columns: 1fr auto;
  gap: 3rem; align-items: start;
}
.about-text { display: flex; flex-direction: column; gap: 1rem; color: var(--text-muted); }
.about-text strong { color: var(--text); }

.about-card {
  display: flex; flex-direction: column; align-items: center;
  gap: 1.5rem; min-width: 200px;
}

.about-avatar {
  width: 140px; height: 140px; border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--accent-dim);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 0 4px var(--bg), 0 0 0 6px var(--border);
}
.avatar-initials {
  font-family: var(--font-mono); font-size: 2rem;
  font-weight: 700; color: var(--accent);
}

.about-quick { width: 100%; display: flex; flex-direction: column; gap: 0.75rem; }
.quick-item { display: flex; flex-direction: column; }
.quick-label { color: var(--accent); font-size: 0.75rem; }
.quick-value { color: var(--text); font-size: 0.9rem; }

/* ── Timeline ── */
.timeline {
  position: relative; padding-left: 2rem;
}
.timeline::before {
  content: ''; position: absolute;
  left: 7px; top: 0; bottom: 0;
  width: 2px; background: var(--border);
}

.timeline-item {
  position: relative; margin-bottom: 2.5rem;
}
.timeline-dot {
  position: absolute; left: -2rem; top: 6px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg-alt); border: 2px solid var(--accent);
  box-shadow: 0 0 8px var(--accent-dim);
}

.timeline-content {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem;
  transition: border-color var(--transition);
}
.timeline-content:hover { border-color: var(--accent); }

.timeline-header {
  display: flex; justify-content: space-between;
  align-items: flex-start; gap: 1rem; flex-wrap: wrap;
  margin-bottom: 0.25rem;
}
.timeline-title { font-size: 1.05rem; font-weight: 600; }
.timeline-period { color: var(--accent); font-size: 0.8rem; white-space: nowrap; }
.timeline-company { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 0.75rem; }
.timeline-desc { color: var(--text-muted); font-size: 0.95rem; }

/* ── Skills ── */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}
.skill-group {
  background: var(--bg-alt); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem;
}
.skill-category {
  color: var(--accent); font-size: 0.8rem;
  text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.skill-tag {
  background: var(--accent-dim); color: var(--accent);
  border: 1px solid var(--accent); border-radius: 4px;
  padding: 0.25rem 0.75rem; font-size: 0.85rem;
}

/* ── Projects ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem;
  display: flex; flex-direction: column; gap: 0.75rem;
  transition: border-color var(--transition), transform var(--transition);
}
.project-card:hover { border-color: var(--accent); transform: translateY(-3px); }

.project-header {
  display: flex; justify-content: space-between; align-items: center;
}
.project-icon { width: 32px; height: 32px; color: var(--accent); }
.project-link { color: var(--text-muted); transition: color var(--transition); }
.project-link:hover { color: var(--accent); opacity: 1; }
.project-link svg { width: 18px; height: 18px; }

.project-title { font-size: 1rem; font-weight: 600; }
.project-desc { color: var(--text-muted); font-size: 0.9rem; flex: 1; }

.project-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.25rem; }
.project-tag {
  color: var(--accent); font-size: 0.75rem;
  background: var(--accent-dim); border-radius: 3px;
  padding: 0.15rem 0.5rem;
}

/* ── Contact ── */
.contact-container { text-align: center; }
.contact-intro {
  max-width: 560px; margin: 0 auto 2.5rem;
  color: var(--text-muted); font-size: 1.05rem;
}
.contact-links { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ── Empty state ── */
.empty-state {
  border: 1px dashed var(--border); border-radius: var(--radius);
  padding: 3rem; text-align: center; color: var(--text-muted);
}

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--border);
  text-align: center; padding: 2rem;
  color: var(--text-muted); font-size: 0.85rem;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: fixed; inset: 64px 0 0;
    background: var(--bg-alt); padding: 2rem;
    gap: 1.5rem; z-index: 99;
  }
  .nav-links.open a { font-size: 1.2rem; }
  .nav-burger { display: flex; }

  .about-grid { grid-template-columns: 1fr; }
  .about-card { flex-direction: row; min-width: unset; }

  .hero-scroll { display: none; }
}