/* ---------- Reset & base ---------- */
:root{
  --bg: #0b0f14;
  --bg-alt: #0f151d;
  --surface: #131a23;
  --surface-hover: #182130;
  --border: #223041;
  --text: #e9eef4;
  --text-dim: #9fb0c3;
  --text-faint: #6b7c90;
  --accent: #4fd1c5;
  --accent-2: #7c9eff;
  --accent-soft: rgba(79, 209, 197, 0.12);
  --radius: 14px;
  --shadow: 0 20px 60px -20px rgba(0,0,0,0.6);
  --maxw: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
}

:root[data-theme="light"]{
  --bg: #f5f7fa;
  --bg-alt: #eef1f6;
  --surface: #ffffff;
  --surface-hover: #f0f3f8;
  --border: #dde3ec;
  --text: #10151c;
  --text-dim: #4b5b6d;
  --text-faint: #7c8a9a;
  --accent: #0f9c8f;
  --accent-2: #3f5fd8;
  --accent-soft: rgba(15, 156, 143, 0.10);
  --shadow: 0 20px 60px -25px rgba(20,30,50,0.25);
}

@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg: #f5f7fa;
    --bg-alt: #eef1f6;
    --surface: #ffffff;
    --surface-hover: #f0f3f8;
    --border: #dde3ec;
    --text: #10151c;
    --text-dim: #4b5b6d;
    --text-faint: #7c8a9a;
    --accent: #0f9c8f;
    --accent-2: #3f5fd8;
    --accent-soft: rgba(15, 156, 143, 0.10);
    --shadow: 0 20px 60px -25px rgba(20,30,50,0.25);
  }
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
ul{ list-style: none; margin: 0; padding: 0; }
h1, h2, h3{ line-height: 1.15; margin: 0; }
p{ margin: 0; }

.container{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Reveal animation ---------- */
.reveal{
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in-view{
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Progress bar ---------- */
.progress-bar{
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 1000;
  transition: width 0.1s linear;
}

/* ---------- Nav ---------- */
.nav{
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}
.nav.scrolled{
  border-bottom-color: var(--border);
}
.nav-inner{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand{
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  margin-right: auto;
}
.brand .dot{ color: var(--accent); }
.nav-links{
  display: flex;
  gap: 28px;
  font-size: 0.92rem;
}
.nav-links a{
  color: var(--text-dim);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}
.nav-links a:hover{ color: var(--text); }
.nav-links a::after{
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0%;
  height: 2px;
  background: var(--accent);
  transition: width 0.25s ease;
}
.nav-links a:hover::after{ width: 100%; }

.nav-cta{ font-size: 0.85rem; padding: 8px 16px; }

.nav-toggle{
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span{
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

/* ---------- Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
  white-space: nowrap;
}
.btn:active{ transform: scale(0.97); }
.btn-primary{
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #06110f;
}
.btn-primary:hover{
  box-shadow: 0 10px 30px -8px var(--accent);
  transform: translateY(-2px);
}
.btn-ghost{
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover{
  background: var(--surface-hover);
  border-color: var(--accent);
}

/* ---------- Hero ---------- */
.hero{
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 80px;
  overflow: hidden;
}
.hero-bg{
  position: absolute;
  inset: -20% -10%;
  background:
    radial-gradient(600px 400px at 15% 20%, var(--accent-soft), transparent 60%),
    radial-gradient(500px 400px at 85% 60%, rgba(124,158,255,0.12), transparent 60%);
  z-index: 0;
  pointer-events: none;
}
.hero-inner{
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.eyebrow{
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
  margin: 0 0 14px;
}
.hero-text h1{
  font-size: clamp(2.6rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.hero-role{
  margin-top: 10px;
  font-size: clamp(1.1rem, 2.2vw, 1.5rem);
  font-weight: 600;
  color: var(--text-dim);
}
.hero-role .accent{ color: var(--accent); }
.hero-lead{
  margin-top: 22px;
  max-width: 58ch;
  color: var(--text-dim);
  font-size: 1.02rem;
}
.hero-lead strong{ color: var(--text); }
.hero-actions{
  margin-top: 32px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-socials{
  margin-top: 30px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.hero-socials a{
  font-size: 0.88rem;
  color: var(--text-faint);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.hero-socials a:hover{
  color: var(--accent);
  border-color: var(--accent);
}

.hero-media{
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 380px;
}
.hero-photo-frame{
  width: min(340px, 80vw);
  aspect-ratio: 1 / 1;
  border-radius: 32px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  position: relative;
}
.hero-photo-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(160deg, transparent 60%, rgba(0,0,0,0.35));
  pointer-events: none;
}
.hero-photo-frame img{
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.stat-card{
  position: absolute;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-width: 150px;
  animation: float 6s ease-in-out infinite;
}
.stat-num{
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
}
.stat-label{
  font-size: 0.76rem;
  color: var(--text-faint);
  margin-top: 2px;
}
.stat-card-1{ top: -10px; left: -10px; animation-delay: 0s; }
.stat-card-2{ bottom: 40px; right: -30px; animation-delay: 1.5s; }
.stat-card-3{ bottom: -30px; left: 30px; animation-delay: 3s; }

@keyframes float{
  0%, 100%{ transform: translateY(0); }
  50%{ transform: translateY(-8px); }
}

.scroll-cue{
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 2px solid var(--border);
  border-radius: 20px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
  z-index: 1;
}
.scroll-cue span{
  width: 4px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
  animation: scrollcue 1.6s ease infinite;
}
@keyframes scrollcue{
  0%{ opacity: 1; transform: translateY(0); }
  100%{ opacity: 0; transform: translateY(12px); }
}

/* ---------- Sections ---------- */
.section{ padding: 110px 0; }
.section-alt{ background: var(--bg-alt); }
.section-eyebrow{
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  margin: 0 0 12px;
}
.section-title{
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  max-width: 30ch;
  margin-bottom: 48px;
}

/* ---------- About ---------- */
.about-grid{
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 48px;
  align-items: start;
}
.about-copy p{
  color: var(--text-dim);
  margin-bottom: 18px;
  max-width: 62ch;
}
.lang-row{
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 26px;
}
.lang-pill{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 16px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 130px;
}
.lang-pill strong{ font-size: 0.92rem; }
.lang-pill span{ font-size: 0.78rem; color: var(--text-faint); }

.about-highlights{
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.highlight-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.highlight-card:hover{
  transform: translateY(-4px);
  border-color: var(--accent);
}
.highlight-card h3{
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--accent);
}
.highlight-card p{
  font-size: 0.9rem;
  color: var(--text-dim);
}

/* ---------- Timeline ---------- */
.timeline{
  position: relative;
  padding-left: 32px;
  border-left: 2px solid var(--border);
}
.timeline-item{
  position: relative;
  padding-bottom: 48px;
}
.timeline-item:last-child{ padding-bottom: 0; }
.timeline-marker{
  position: absolute;
  left: -39px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-alt);
  border: 3px solid var(--accent);
}
.timeline-head{
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px 20px;
}
.timeline-head h3{
  font-size: 1.1rem;
  font-weight: 700;
  max-width: 60ch;
}
.timeline-date{
  font-size: 0.82rem;
  color: var(--text-faint);
  white-space: nowrap;
  font-weight: 600;
}
.timeline-company{
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
  margin: 4px 0 14px;
}
.timeline-content ul{
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.timeline-content li{
  color: var(--text-dim);
  font-size: 0.94rem;
  position: relative;
  padding-left: 18px;
}
.timeline-content li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-2);
}
.timeline-tools{
  margin-top: 14px;
  font-size: 0.84rem;
  color: var(--text-faint);
}
.timeline-tools strong{ color: var(--text-dim); }

.timeline-collapsed .timeline-content{
  cursor: pointer;
}
.earlier-list{
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.earlier-list li{
  color: var(--text-dim);
  font-size: 0.9rem;
}
.earlier-list strong{ color: var(--text); }

/* ---------- Skills ---------- */
.skills-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 18px;
}
.skill-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.skill-card:hover{
  transform: translateY(-4px);
  border-color: var(--accent);
}
.skill-card h3{
  font-size: 0.98rem;
  margin-bottom: 14px;
}
.tag-list{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-list li{
  font-size: 0.8rem;
  color: var(--text-dim);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
}

/* ---------- Certs / education ---------- */
.two-col{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.cert-list{
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.cert-list li{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.cert-name{ font-weight: 700; font-size: 0.95rem; }
.cert-issuer{ font-size: 0.82rem; color: var(--text-faint); }

/* ---------- Contact ---------- */
.contact-inner{ text-align: center; }
.contact-inner .section-title{ margin-left: auto; margin-right: auto; }
.contact-lead{
  color: var(--text-dim);
  max-width: 52ch;
  margin: 0 auto 44px;
}
.contact-cards{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.contact-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.contact-card:hover{
  transform: translateY(-4px);
  border-color: var(--accent);
}
.contact-label{
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  font-weight: 700;
}
.contact-value{
  font-size: 0.92rem;
  color: var(--text);
  word-break: break-word;
}

/* ---------- Footer ---------- */
.footer{
  border-top: 1px solid var(--border);
  padding: 28px 0;
}
.footer-inner{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-faint);
}
.back-to-top{
  color: var(--text-dim);
  transition: color 0.2s ease;
}
.back-to-top:hover{ color: var(--accent); }

/* ---------- Responsive ---------- */
@media (max-width: 920px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-media{ order: -1; min-height: 300px; }
  .about-grid{ grid-template-columns: 1fr; }
  .two-col{ grid-template-columns: 1fr; gap: 40px; }
  .stat-card{ display: none; }
}

@media (max-width: 720px){
  .nav-links{
    position: fixed;
    top: 64px;
    left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }
  .nav-links.open{
    transform: translateY(0);
    opacity: 1;
  }
  .nav-cta{ display: none; }
  .nav-toggle{ display: flex; }
  .section{ padding: 80px 0; }
  .timeline{ padding-left: 24px; }
  .timeline-marker{ left: -31px; }
}

@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; }
  html{ scroll-behavior: auto; }
}
.keyword{
    color: var(--accent-2);
    font-weight: 700;
    letter-spacing: .01em;
}