/* ── Reset & Variables ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --border: #e8e8e8;
  --text: #1a1a1a;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-light: #eff6ff;
  --radius: 12px;
  --max: 860px;
}
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); line-height: 1.65; }

/* ── Nav ── */
nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(250,250,250,0.9); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
.nav-inner { max-width: var(--max); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; height: 60px; }
.nav-logo { font-weight: 700; font-size: 1.05rem; color: var(--text); text-decoration: none; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a { text-decoration: none; color: var(--muted); font-size: 0.9rem; transition: color 0.2s; }
.nav-links a:hover { color: var(--accent); }

/* ── Layout ── */
.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
section { padding: 80px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ── Hero ── */
#hero { min-height: 100vh; display: flex; align-items: center; padding-top: 80px; }
.hero-content { display: flex; align-items: center; gap: 48px; flex-wrap: wrap; }
.avatar { width: 140px; height: 140px; border-radius: 50%; background: linear-gradient(135deg,#dbeafe,#bfdbfe); border: 4px solid var(--border); display: flex; align-items: center; justify-content: center; font-size: 3rem; flex-shrink: 0; overflow: hidden; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.hero-text h1 { font-size: clamp(1.8rem,4vw,2.6rem); font-weight: 800; letter-spacing: -0.5px; }
.hero-text .role { display: inline-block; margin-top: 6px; background: var(--accent-light); color: var(--accent); padding: 4px 14px; border-radius: 20px; font-size: 0.9rem; font-weight: 500; }
.hero-text .bio { margin-top: 16px; color: var(--muted); max-width: 480px; font-size: 1.05rem; }
.hero-links { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }

/* ── Buttons ── */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 20px; border-radius: 8px; font-size: 0.9rem; font-weight: 500; text-decoration: none; transition: all 0.2s; cursor: pointer; border: none; font-family: inherit; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #1d4ed8; transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--text); border: 1.5px solid var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* ── Section Header ── */
.section-header { margin-bottom: 40px; }
.section-label { font-size: 0.78rem; font-weight: 600; letter-spacing: 1.5px; text-transform: uppercase; color: var(--accent); }
.section-title { font-size: clamp(1.4rem,3vw,1.9rem); font-weight: 700; margin-top: 4px; }
hr.section-line { border: none; border-top: 2px solid var(--border); margin: 16px 0 0; width: 48px; }

/* ── About ── */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.stat-card .number { font-size: 2rem; font-weight: 800; color: var(--accent); }
.stat-card .label { color: var(--muted); font-size: 0.9rem; margin-top: 2px; }
.about-text { color: var(--muted); margin-bottom: 16px; }

/* ── Timeline ── */
.tabs { display: flex; gap: 8px; margin-bottom: 32px; }
.tab { padding: 8px 18px; border-radius: 8px; border: 1.5px solid var(--border); background: transparent; font-size: 0.9rem; font-weight: 500; cursor: pointer; color: var(--muted); transition: all 0.2s; text-decoration: none; }
.tab.active, a.tab.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.tab:hover:not(.active) { border-color: var(--accent); color: var(--accent); }
.timeline { display: none; flex-direction: column; }
.timeline.active { display: flex; }
.timeline-item { display: flex; gap: 20px; padding-bottom: 32px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-left { display: flex; flex-direction: column; align-items: center; width: 24px; flex-shrink: 0; }
.dot { width: 12px; height: 12px; border-radius: 50%; background: var(--accent); flex-shrink: 0; margin-top: 5px; }
.line { flex: 1; width: 2px; background: var(--border); margin-top: 4px; }
.timeline-item:last-child .line { display: none; }
.tl-date { font-size: 0.82rem; color: var(--muted); width: 110px; flex-shrink: 0; margin-top: 3px; }
.tl-content { flex: 1; }
.tl-content h3 { font-size: 1rem; font-weight: 600; }
.tl-company { color: var(--accent); font-size: 0.9rem; font-weight: 500; }
.tl-content p { color: var(--muted); font-size: 0.9rem; margin-top: 6px; }

/* ── Skills ── */
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(260px,1fr)); gap: 16px; }
.skill-group { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.skill-group h3 { font-size: 0.9rem; font-weight: 600; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { background: var(--accent-light); color: var(--accent); padding: 4px 12px; border-radius: 20px; font-size: 0.82rem; font-weight: 500; }

/* ── Blog ── */
.blog-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(260px,1fr)); gap: 20px; }
.blog-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; transition: box-shadow 0.2s, transform 0.2s; text-decoration: none; color: var(--text); display: block; }
.blog-card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.08); transform: translateY(-2px); }
.blog-category { display: inline-block; font-size: 0.75rem; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.blog-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.blog-card p { color: var(--muted); font-size: 0.87rem; }
.meta { margin-top: 16px; font-size: 0.8rem; color: var(--muted); display: flex; justify-content: space-between; }

/* ── Contact ── */
.contact-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-info p { color: var(--muted); margin-bottom: 24px; }
.contact-links { display: flex; flex-direction: column; gap: 12px; }
.contact-link { display: flex; align-items: center; gap: 12px; padding: 14px 18px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); text-decoration: none; color: var(--text); transition: all 0.2s; }
.contact-link:hover { border-color: var(--accent); color: var(--accent); }
.contact-form { display: flex; flex-direction: column; gap: 14px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.85rem; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select { padding: 10px 14px; border: 1.5px solid var(--border); border-radius: 8px; font-size: 0.9rem; background: var(--surface); transition: border-color 0.2s; outline: none; font-family: inherit; }
.form-group input:focus, .form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 110px; }

/* ── Footer ── */
footer { border-top: 1px solid var(--border); padding: 28px 0; text-align: center; color: var(--muted); font-size: 0.85rem; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .hero-content { flex-direction: column; gap: 24px; }
  .about-grid { grid-template-columns: 1fr 1fr; }
  .timeline-item { gap: 12px; }
  .tl-date { width: 80px; font-size: 0.75rem; }
  .contact-wrapper { grid-template-columns: 1fr; }
  .nav-links { gap: 16px; }
}