/* ============ Tokens ============ */
:root{
  --bg: oklch(0.16 0.03 255);
  --fg: oklch(0.96 0.01 240);
  --muted: oklch(0.72 0.02 250);
  --border: oklch(0.32 0.04 258);
  --primary: oklch(0.82 0.16 215);
  --primary-fg: oklch(0.16 0.03 255);
  --accent: oklch(0.78 0.18 200);
  --glass: oklch(0.28 0.04 258 / 0.45);
  --glass-border: oklch(0.85 0.12 215 / 0.18);
  --cyan-glow: oklch(0.82 0.18 210);
  --gradient-hero:
    radial-gradient(ellipse at top, oklch(0.28 0.08 230 / 0.6), transparent 60%),
    radial-gradient(ellipse at bottom right, oklch(0.4 0.15 200 / 0.25), transparent 50%),
    linear-gradient(180deg, oklch(0.14 0.03 255), oklch(0.18 0.04 258));
  --gradient-cyan: linear-gradient(135deg, oklch(0.85 0.18 200), oklch(0.7 0.2 230));
  --gradient-text: linear-gradient(135deg, oklch(0.96 0.01 240) 20%, oklch(0.82 0.18 200) 80%);
  --shadow-glow: 0 0 40px -10px oklch(0.78 0.2 210 / 0.5);
  --shadow-glass: 0 8px 32px 0 oklch(0.1 0.05 255 / 0.5);
  --radius: 14px;
  --radius-lg: 22px;
  --radius-xl: 28px;
}

/* ============ Base ============ */
*{box-sizing:border-box;margin:0;padding:0;border-color:var(--border)}
html{scroll-behavior:smooth}
body{
  font-family:"Inter",ui-sans-serif,system-ui,sans-serif;
  background:var(--gradient-hero) fixed;
  color:var(--fg);
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
  min-height:100vh;
}
a{color:inherit;text-decoration:none}
::selection{background:oklch(0.78 0.18 200 / 0.3);color:oklch(0.98 0.01 240)}
img,svg{display:block;max-width:100%}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea{font:inherit;color:inherit}

.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}
.muted{color:var(--muted)}
.muted.lg{font-size:1.125rem;line-height:1.7}
.xs{font-size:.75rem}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.strong{font-family:"Space Grotesk",sans-serif;font-weight:600;color:var(--fg)}
.accent{color:var(--accent)}

h1,h2,h3,h4{font-family:"Space Grotesk","Inter",sans-serif;letter-spacing:-0.02em;line-height:1.1}
h2{font-size:clamp(2rem,4vw,3rem);font-weight:700}
h3{font-size:1.5rem;font-weight:600}

.text-gradient{
  background:var(--gradient-text);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.text-cyan-gradient{
  background:var(--gradient-cyan);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ============ Glass / cards ============ */
.glass{
  background:var(--glass);
  backdrop-filter:blur(20px) saturate(160%);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  border:1px solid var(--glass-border);
  box-shadow:var(--shadow-glass);
  border-radius:var(--radius-lg);
}
.card{padding:1.5rem;transition:transform .4s cubic-bezier(.2,.8,.2,1), border-color .4s, box-shadow .4s}
.card:hover{transform:translateY(-4px);border-color:oklch(0.78 0.18 200 / 0.5);box-shadow:var(--shadow-glass),var(--shadow-glow)}

.chip{
  display:inline-flex;align-items:center;gap:.5rem;
  padding:.4rem 1rem;border-radius:999px;font-size:.72rem;
  text-transform:uppercase;letter-spacing:.2em;color:var(--muted)
}
.dot-cy{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}
.kicker{font-size:.72rem;text-transform:uppercase;letter-spacing:.3em;color:var(--accent);margin-bottom:.75rem}

/* ============ Buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.85rem 1.6rem;border-radius:999px;font-weight:500;
  transition:transform .25s ease, box-shadow .25s ease, background .25s;
}
.btn:hover{transform:scale(1.04)}
.btn-primary{background:var(--gradient-cyan);color:var(--primary-fg);animation:glow 3s ease-in-out infinite}
.btn-glass{
  background:var(--glass);border:1px solid var(--glass-border);
  backdrop-filter:blur(16px);color:var(--fg)
}
.btn-ghost{
  border:1px solid oklch(0.78 0.18 200 / 0.4);
  background:oklch(0.78 0.18 200 / 0.1);color:var(--accent)
}
.btn-sm{padding:.55rem 1.05rem;font-size:.875rem}
.btn.full{width:100%}

.icon-btn{
  display:inline-grid;place-items:center;width:44px;height:44px;border-radius:50%;
  color:var(--muted);transition:color .2s, transform .25s;
}
.icon-btn:hover{color:var(--accent);transform:translateY(-2px)}

/* ============ Nav ============ */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;padding:1rem 0;transition:padding .3s, background .3s}
.nav.scrolled{padding:.5rem 0}
.nav.scrolled .nav-inner{background:var(--glass);backdrop-filter:blur(20px) saturate(160%);border:1px solid var(--glass-border)}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.75rem 1.25rem;border-radius:18px;border:1px solid transparent;
  transition:all .3s
}
.brand{display:flex;align-items:center;gap:.5rem;font-family:"Space Grotesk",sans-serif;font-weight:700}
.brand-mark{
  display:grid;place-items:center;width:32px;height:32px;border-radius:8px;
  background:var(--gradient-cyan);color:var(--primary-fg);font-size:.78rem;font-weight:700
}
.brand .dot{color:var(--accent)}
.nav-links{display:none;gap:2rem;list-style:none;font-size:.9rem;color:var(--muted)}
.nav-links a{position:relative;transition:color .2s}
.nav-links a:hover{color:var(--fg)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-4px;height:1px;width:0;background:var(--accent);transition:width .25s}
.nav-links a:hover::after{width:100%}
.desktop-only{display:none}
.mobile-only{display:inline-grid}
.mobile-menu[hidden]{display:none!important}
.mobile-menu{position:absolute;left:1rem;right:1rem;top:calc(100% + .25rem);display:flex;flex-direction:column;gap:.25rem;padding:1rem;border-radius:18px;background:var(--glass);backdrop-filter:blur(20px) saturate(160%);-webkit-backdrop-filter:blur(20px) saturate(160%);border:1px solid var(--glass-border);max-height:calc(100vh - 6rem);overflow-y:auto;box-shadow:0 20px 40px -10px rgba(0,0,0,.5);z-index:60}
.mobile-menu a{padding:.6rem .75rem;border-radius:10px;color:var(--muted);text-decoration:none}
.mobile-menu a:hover{background:oklch(0.28 0.04 258);color:var(--fg)}
body.menu-open{overflow:hidden}

@media (min-width:860px){
  .nav-links{display:flex}
  .desktop-only{display:inline-flex}
  .mobile-only{display:none}
}

/* ============ Hero ============ */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:9rem 0 5rem;overflow:hidden}
.grid-bg{
  position:absolute;inset:0;
  background-image:
    linear-gradient(oklch(0.78 0.18 200 / 0.06) 1px, transparent 1px),
    linear-gradient(90deg, oklch(0.78 0.18 200 / 0.06) 1px, transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse at center, black 30%, transparent 75%);
  mask-image:radial-gradient(ellipse at center, black 30%, transparent 75%);
}
.hero-glow{
  position:absolute;top:-160px;left:50%;transform:translateX(-50%);
  width:480px;height:480px;border-radius:50%;
  background:radial-gradient(circle, var(--cyan-glow), transparent 70%);
  opacity:.3;filter:blur(60px);
}
.hero-inner{position:relative;text-align:center;max-width:880px}
.display{
  margin-top:2rem;font-family:"Space Grotesk",sans-serif;
  font-size:clamp(3rem,9vw,7rem);font-weight:700;line-height:.95;letter-spacing:-0.03em;
}
.lead{margin:2rem auto 0;max-width:620px;color:var(--muted);font-size:clamp(1rem,1.4vw,1.2rem);line-height:1.7}
.hero-actions{margin-top:3rem;display:flex;flex-wrap:wrap;gap:1rem;justify-content:center}
.socials{margin-top:3rem;display:flex;gap:1rem;justify-content:center}

/* ============ Sections ============ */
.section{padding:6rem 0;position:relative}
.section-head{text-align:center;max-width:640px;margin:0 auto 4rem}
.section-head .muted{margin-top:1rem}

/* About */
.about-grid{display:grid;gap:1.5rem;max-width:1100px;margin:0 auto}
.about-grid > .card h3{margin-bottom:1rem}
.about-grid > .card p{color:var(--muted);margin-bottom:1rem;line-height:1.7}
.stats-grid{display:grid;gap:1rem}
.stats-grid .stat{display:flex;align-items:center;gap:1rem}
.stat-icon{
  display:grid;place-items:center;width:48px;height:48px;border-radius:14px;
  background:var(--gradient-cyan);font-size:1.25rem;flex-shrink:0;
}
.subhead{margin:4rem auto 2.5rem;max-width:1100px;text-align:center;font-size:1.75rem}
.skills-grid{display:grid;gap:1.25rem;max-width:1100px;margin:0 auto;grid-template-columns:1fr}
.skill-card h4{font-family:"Space Grotesk";font-size:1.1rem;margin-bottom:.25rem}
.skill-head{display:flex;align-items:center;gap:.75rem;margin-bottom:1rem}
.skill-head .stat-icon{width:40px;height:40px;border-radius:10px;font-size:1rem}
.skill-card ul{list-style:none;display:flex;flex-direction:column;gap:.45rem}
.skill-card li{font-size:.875rem;color:var(--muted);display:flex;gap:.5rem}
.skill-card li::before{content:"▸";color:var(--accent)}

@media(min-width:900px){
  .about-grid{grid-template-columns:3fr 2fr}
  .skills-grid{grid-template-columns:1fr 1fr}
}

/* Stack */
.stack-grid{display:grid;gap:1rem;grid-template-columns:repeat(2,1fr)}
.stack-item{padding:1.5rem;text-align:center;display:flex;flex-direction:column;align-items:center;gap:.5rem}
.stack-item .logo{font-size:2.25rem;color:var(--muted);transition:color .2s}
.stack-item:hover .logo{color:var(--accent)}
.stack-item h3{font-size:1rem}
@media(min-width:600px){.stack-grid{grid-template-columns:repeat(3,1fr)}}
@media(min-width:1000px){.stack-grid{grid-template-columns:repeat(6,1fr)}}

/* Projects */
.projects-grid{display:grid;gap:1.5rem;grid-template-columns:1fr}
@media(min-width:820px){.projects-grid{grid-template-columns:1fr 1fr}}
.project-card{display:flex;flex-direction:column;padding:2rem;border-radius:var(--radius-xl)}
.project-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1.5rem}
.project-icon{
  display:grid;place-items:center;width:56px;height:56px;border-radius:18px;
  background:var(--gradient-cyan);color:var(--primary-fg);font-size:1.4rem;
}
.project-card h3{font-size:1.4rem;margin-bottom:.75rem}
.project-card p{color:var(--muted);line-height:1.7;flex:1;margin-bottom:1.5rem}
.tags{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.5rem}
.tag{
  font-size:.72rem;padding:.3rem .75rem;border-radius:999px;
  border:1px solid oklch(0.78 0.18 200 / 0.25);background:oklch(0.78 0.18 200 / 0.07);color:var(--accent)
}
.project-link{color:var(--accent);font-weight:500;font-size:.875rem;display:inline-flex;gap:.4rem;transition:gap .2s}
.project-link:hover{gap:.7rem}

/* Certs */
.certs-grid{display:grid;gap:1.5rem;grid-template-columns:1fr}
@media(min-width:700px){.certs-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1000px){.certs-grid{grid-template-columns:repeat(3,1fr)}}
.cert{padding:1.5rem;display:block;transition:transform .3s, border-color .3s, box-shadow .3s}
.cert:hover{transform:translateY(-4px);border-color:oklch(0.78 0.18 200 / 0.5);box-shadow:var(--shadow-glass),var(--shadow-glow)}
.cert-badge{
  display:inline-grid;place-items:center;width:56px;height:56px;border-radius:14px;
  margin-bottom:1.25rem;color:#0c1220;font-size:1.6rem;font-weight:700;
  box-shadow:0 8px 24px oklch(0.1 0.05 255 / 0.5)
}
.cert h3{font-size:1.1rem;line-height:1.3}
.cert .issuer{font-size:.875rem;color:var(--muted);margin-top:.25rem}
.cert .meta{display:flex;justify-content:space-between;align-items:center;margin-top:1.25rem;font-size:.7rem;text-transform:uppercase;letter-spacing:.18em;color:var(--muted)}
.cert .verify{color:var(--accent)}

/* Timeline */
.timeline{position:relative;max-width:780px;margin:0 auto}
.timeline::before{
  content:"";position:absolute;left:24px;top:0;bottom:0;width:1px;
  background:linear-gradient(to bottom, transparent, oklch(0.78 0.18 200 / 0.5), transparent);
}
.tl-item{position:relative;padding-left:72px;margin-bottom:3rem}
.tl-dot{
  position:absolute;left:0;top:0;display:grid;place-items:center;width:48px;height:48px;border-radius:50%;
  background:var(--glass);backdrop-filter:blur(16px);border:1px solid var(--glass-border);
  box-shadow:var(--shadow-glow);color:var(--accent);font-size:1.1rem
}
.tl-content{padding:1.5rem;border-radius:var(--radius-lg)}
.tl-date{font-family:ui-monospace,monospace;font-size:.72rem;color:var(--accent);margin-bottom:.5rem}
.tl-content h3{font-size:1.2rem;margin-bottom:.25rem}
.tl-place{color:var(--muted);font-size:.875rem;margin-bottom:.75rem}
.tl-desc{color:var(--muted);font-size:.875rem;line-height:1.7}

@media(min-width:780px){
  .timeline::before{left:50%;transform:translateX(-50%)}
  .tl-item{padding-left:0;display:flex;align-items:center;margin-bottom:4rem}
  .tl-dot{left:50%;transform:translateX(-50%);top:50%;margin-top:-24px}
  .tl-content{width:calc(50% - 48px)}
  .tl-item:nth-child(odd) .tl-content{margin-right:auto;text-align:right}
  .tl-item:nth-child(even) .tl-content{margin-left:auto}
}

/* Contact */
.contact-grid{display:grid;gap:3rem;max-width:1100px;align-items:start}
@media(min-width:900px){.contact-grid{grid-template-columns:1fr 1fr}}
.contact-info{margin-top:2.5rem;display:flex;flex-direction:column;gap:1rem}
.row{display:flex;align-items:center;gap:1rem;padding:1rem}
.round-icon{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:oklch(0.78 0.18 200 / 0.12);color:var(--accent);font-size:1.1rem}
.contact-socials{display:flex;gap:.75rem}
.contact-socials .icon-btn{width:48px;height:48px;border-radius:14px;font-weight:700;font-size:.9rem}

.form{padding:2rem;display:flex;flex-direction:column;gap:1rem;border-radius:var(--radius-xl)}
.form label{font-size:.875rem;font-weight:500;margin-top:.25rem}
.form input,.form textarea{
  width:100%;padding:.85rem 1rem;border-radius:12px;
  background:oklch(0.28 0.04 258 / 0.5);border:1px solid var(--border);
  color:var(--fg);outline:none;transition:border-color .2s, box-shadow .2s;resize:vertical;
}
.form input:focus,.form textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px oklch(0.78 0.18 200 / 0.2)}

/* Footer */
.footer{padding:2.5rem 0;border-top:1px solid oklch(0.32 0.04 258 / 0.5);margin-top:3rem}
.footer-inner{display:flex;flex-direction:column;gap:.5rem;align-items:center;justify-content:space-between;font-size:.875rem;color:var(--muted);text-align:center}
@media(min-width:600px){.footer-inner{flex-direction:row;text-align:left}}

/* ============ Reveal animation ============ */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s cubic-bezier(.2,.8,.2,1), transform .8s cubic-bezier(.2,.8,.2,1)}
.reveal.in{opacity:1;transform:none}

@keyframes glow{
  0%,100%{box-shadow:0 0 20px -5px oklch(0.78 0.2 210 / 0.5)}
  50%{box-shadow:0 0 40px -5px oklch(0.78 0.2 210 / 0.85)}
}