/* ============ base ============ */
:root {
  --bg: #060a14;
  --bg-soft: #0b1120;
  --panel: rgba(255, 255, 255, 0.035);
  --panel-strong: rgba(255, 255, 255, 0.055);
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.25);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --faint: #64748b;
  --indigo: #6366f1;
  --cyan: #22d3ee;
  --grad: linear-gradient(135deg, #818cf8 0%, #22d3ee 100%);
  --radius: 16px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ============ ambient bg ============ */
.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; background: var(--bg); }
.orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5; }
.orb-a { width: 520px; height: 520px; background: #4338ca; top: -180px; left: -120px; animation: drift 22s ease-in-out infinite alternate; }
.orb-b { width: 460px; height: 460px; background: #0e7490; bottom: -160px; right: -100px; animation: drift 26s ease-in-out infinite alternate-reverse; }
.grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(148,163,184,0.05) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(148,163,184,0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 20%, black 30%, transparent 75%);
}
@keyframes drift { from { transform: translate(0,0) scale(1); } to { transform: translate(60px,40px) scale(1.12); } }

/* ============ nav ============ */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(6, 10, 20, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { max-width: 1040px; margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; justify-content: space-between; }
.logo { font-family: var(--font-display); font-weight: 700; font-size: 20px; letter-spacing: 1px; }
.logo .dot { color: var(--cyan); }
.nav-links { display: flex; gap: 26px; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 13.5px; font-weight: 500; letter-spacing: 0.4px; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }

/* ============ hero ============ */
.hero { max-width: 1040px; margin: 0 auto; padding: 88px 24px 64px; text-align: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px; border-radius: 999px;
  background: var(--panel); border: 1px solid var(--border);
  font-size: 12px; font-weight: 600; letter-spacing: 0.6px; color: var(--muted);
  margin-bottom: 34px;
}
.pulse { width: 8px; height: 8px; border-radius: 50%; background: #34d399; box-shadow: 0 0 0 0 rgba(52,211,153,0.6); animation: pulse 2.2s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(52,211,153,0.55); } 70% { box-shadow: 0 0 0 9px rgba(52,211,153,0); } 100% { box-shadow: 0 0 0 0 rgba(52,211,153,0); } }

.avatar { position: relative; width: 118px; height: 118px; margin: 0 auto 28px; }
.avatar-ring {
  position: absolute; inset: -6px; border-radius: 50%;
  border: 1.5px solid transparent;
  background: var(--grad) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  animation: spin 14s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.monogram {
  width: 100%; height: 100%; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 42px; font-weight: 700;
  background: linear-gradient(160deg, #1e1b4b, #0f172a);
  border: 1px solid var(--border-strong);
  color: transparent; background-clip: text; -webkit-background-clip: text;
  box-shadow: 0 18px 50px rgba(99,102,241,0.25);
}

.name { font-family: var(--font-display); font-size: clamp(44px, 7vw, 76px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.05; margin-bottom: 18px; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.headline { color: var(--muted); font-size: clamp(14px, 2.2vw, 18px); font-weight: 500; letter-spacing: 0.4px; max-width: 640px; margin: 0 auto 10px; }
.loc { color: var(--faint); font-size: 14px; margin-bottom: 34px; }

.cta { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 56px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 12px;
  font-size: 14px; font-weight: 600; letter-spacing: 0.3px; text-decoration: none;
  transition: transform 0.18s, box-shadow 0.25s, background 0.2s, border-color 0.2s;
}
.btn.primary { background: var(--grad); color: #060a14; box-shadow: 0 10px 30px rgba(99,102,241,0.35); }
.btn.primary:hover { transform: translateY(-2px); box-shadow: 0 14px 38px rgba(99,102,241,0.5); }
.btn.ghost { background: var(--panel); color: var(--text); border: 1px solid var(--border-strong); }
.btn.ghost:hover { transform: translateY(-2px); border-color: var(--indigo); background: var(--panel-strong); }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 14px; max-width: 720px; margin: 0 auto; }
.stat { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 12px; }
.stat-value { font-family: var(--font-display); font-size: 30px; font-weight: 700; color: transparent; background: var(--grad); -webkit-background-clip: text; background-clip: text; }
.stat-label { font-size: 11.5px; letter-spacing: 0.5px; text-transform: uppercase; color: var(--faint); margin-top: 4px; }

/* ============ sections ============ */
.section { max-width: 1040px; margin: 0 auto; padding: 40px 24px 56px; }
.section-inner { max-width: 860px; margin: 0 auto; }
.sec-title { font-family: var(--font-display); font-size: 15px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase; color: var(--text); margin-bottom: 34px; display: flex; align-items: center; gap: 12px; }
.sec-num { color: var(--cyan); font-weight: 600; }
.sec-title::after { content: ''; flex: 1; height: 1px; background: var(--border); }

.about-text { color: var(--muted); font-size: 16.5px; max-width: 720px; }

/* timeline */
.timeline { position: relative; padding-left: 26px; }
.timeline::before { content: ''; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(180deg, var(--indigo), var(--cyan)); opacity: 0.35; }
.exp { position: relative; margin-bottom: 34px; }
.exp::before { content: ''; position: absolute; left: -26px; top: 8px; width: 12px; height: 12px; border-radius: 50%; background: var(--bg); border: 2.5px solid var(--indigo); box-shadow: 0 0 12px rgba(99,102,241,0.55); }
.exp-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 26px; transition: border-color 0.25s, transform 0.25s; }
.exp-card:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.exp-top { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 14px; margin-bottom: 6px; }
.exp-role { font-family: var(--font-display); font-size: 18px; font-weight: 700; }
.exp-company { color: var(--cyan); font-size: 14.5px; font-weight: 600; }
.exp-company a { color: inherit; text-decoration: none; }
.exp-meta { font-size: 12.5px; color: var(--faint); letter-spacing: 0.3px; margin-bottom: 14px; display: flex; flex-wrap: wrap; gap: 10px; }
.exp-meta .tag { padding: 3px 10px; border-radius: 999px; background: var(--panel-strong); border: 1px solid var(--border); font-size: 11px; }
.exp ul { list-style: none; }
.exp li { position: relative; padding-left: 20px; color: var(--muted); font-size: 14.5px; margin-bottom: 8px; }
.exp li::before { content: '▸'; position: absolute; left: 0; color: var(--indigo); font-size: 12px; top: 2px; }

/* chips */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { padding: 9px 18px; border-radius: 999px; background: var(--panel); border: 1px solid var(--border); font-size: 13.5px; font-weight: 500; color: var(--text); transition: all 0.2s; }
.chip:hover { border-color: var(--indigo); color: #a5b4fc; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(99,102,241,0.2); }

/* grid3 */
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; }
.cert { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; display: flex; gap: 14px; align-items: flex-start; transition: border-color 0.2s, transform 0.2s; }
.cert:hover { border-color: var(--border-strong); transform: translateY(-2px); }
.cert-ico { flex: 0 0 34px; height: 34px; border-radius: 10px; background: linear-gradient(135deg, rgba(99,102,241,0.25), rgba(34,211,238,0.2)); border: 1px solid var(--border-strong); display: flex; align-items: center; justify-content: center; font-size: 15px; }
.cert-name { font-size: 14px; font-weight: 600; color: var(--text); line-height: 1.45; }

/* two col */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.edu-item, .lang-item { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; margin-bottom: 12px; }
.edu-instit { font-family: var(--font-display); font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.edu-degree { color: var(--muted); font-size: 14px; margin-bottom: 4px; }
.edu-period { color: var(--faint); font-size: 12.5px; }
.lang-name { font-weight: 600; font-size: 14.5px; margin-bottom: 2px; }
.lang-level { color: var(--muted); font-size: 13px; }

/* ============ footer ============ */
footer { border-top: 1px solid var(--border); background: rgba(6,10,20,0.8); }
.footer-inner { max-width: 1040px; margin: 0 auto; padding: 56px 24px 44px; text-align: center; }
.f-name { font-family: var(--font-display); font-size: 30px; font-weight: 700; margin-bottom: 22px; }
.f-links { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin-bottom: 34px; }
.copy { color: var(--faint); font-size: 13px; }

/* ============ reveal ============ */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ============ responsive ============ */
@media (max-width: 720px) {
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 12.5px; }
  .hero { padding-top: 60px; }
  .two-col { grid-template-columns: 1fr; }
  .sec-title::after { display: none; }
}