/* ========== CSS RESET ========== */
*,*::before,*::after{box-sizing:border-box}
body,h1,h2,h3,h4,p,figure,blockquote,dl,dd{margin:0}
ul[role='list'],ol[role='list']{list-style:none;margin:0;padding:0}
html:focus-within{scroll-behavior:smooth}
body{min-height:100vh;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;line-height:1.5;font-family:system-ui,-apple-system,"Inter",Segoe UI,Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);overflow-x:hidden}
img{display:block;max-width:100%;height:auto}
input,button,textarea,select{font:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
a:focus-visible,button:focus-visible{outline:2px solid var(--focus);outline-offset:2px}
.no-js .theme-toggle{display:none}

:root{
  --font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --radius-xs:3px;--radius-s:5px;--radius-m:10px;--radius-l:18px;
  --shadow-xs:0 1px 2px rgba(0,0,0,.05);
  --shadow-s:0 2px 4px rgba(0,0,0,.08);
  --shadow-m:0 4px 12px rgba(0,0,0,.12);
  --shadow-l:0 8px 28px -4px rgba(0,0,0,.18);
  --ease:cubic-bezier(.4,0,.2,1);
  --gradient-accent:linear-gradient(120deg,#6366f1,#8b5cf6,#ec4899);
  --focus:#6366f1;
}
:root,html[data-theme="light"]{
  --bg:#ffffff;
  --bg-alt:#f5f7fa;
  --bg-accent:#eef1f7;
  --border:#d9dfe7;
  --border-strong:#b2bcc9;
  --text:#1b2430;
  --text-soft:#4b5563;
  --text-inverse:#ffffff;
  --primary:#6366f1;
  --primary-accent:#4f46e5;
  --accent:#ec4899;
  --danger:#dc2626;
  --success:#059669;
  --code:#111827;
  --tag:#eef2ff;
  --tag-text:#4338ca;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){
  html[data-theme="auto"]{
    --bg:#0f141b;
    --bg-alt:#151c25;
    --bg-accent:#1d2733;
    --border:#273544;
    --border-strong:#394a5b;
    --text:#eef1f5;
    --text-soft:#9aa5b1;
    --text-inverse:#ffffff;
    --primary:#818cf8;
    --primary-accent:#6366f1;
    --accent:#f472b6;
    --danger:#ef4444;
    --success:#10b981;
    --code:#e2e8f0;
    --tag:#1e293b;
    --tag-text:#a5b4fc;
    color-scheme:dark;
  }
}
html[data-theme="dark"]{
  --bg:#0f141b;
  --bg-alt:#151c25;
  --bg-accent:#1d2733;
  --border:#273544;
  --border-strong:#394a5b;
  --text:#eef1f5;
  --text-soft:#9aa5b1;
  --text-inverse:#ffffff;
  --primary:#818cf8;
  --primary-accent:#6366f1;
  --accent:#f472b6;
  --danger:#ef4444;
  --success:#10b981;
  --code:#e2e8f0;
  --tag:#1e293b;
  --tag-text:#a5b4fc;
  color-scheme:dark;
}

/* Typography */
h1,h2,h3,h4{line-height:1.15;font-weight:600;font-family:var(--font-sans);letter-spacing:-.02em}
h1{font-size:clamp(2.25rem,4.8vw,3.1rem);font-weight:700}
h2{font-size:clamp(1.9rem,3.5vw,2.4rem);margin-bottom:.9rem}
h3{font-size:clamp(1.1rem,2vw,1.35rem);margin-bottom:.5rem}
.lead{font-size:1.05rem;max-width:60ch;color:var(--text-soft)}
p{margin-bottom:1rem}
.section__title{position:relative;padding-bottom:.4rem}
.section__title::after{content:"";position:absolute;left:0;bottom:0;width:70px;height:3px;background:var(--gradient-accent);border-radius:3px}
.accent{background:var(--gradient-accent);background-clip:text;-webkit-background-clip:text;color:transparent}
.tagline{font-size:1.05rem;font-weight:500;color:var(--primary);margin:.6rem 0 1rem}

.container{max-width:1140px;margin:0 auto;padding:0 1.25rem}
.flex-between{display:flex;align-items:center;justify-content:space-between}
.wrap{flex-wrap:wrap}
.grid{display:grid}
.cols-2{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}
.gap-m{gap:1rem}
.gap-xl{gap:2.4rem}
.section{padding:4.5rem 0}
.section.alt{background:var(--bg-alt)}

.hero{display:grid;align-items:center;gap:3.2rem;padding:3.8rem 0}
@media (min-width:900px){.hero{grid-template-columns:repeat(2,minmax(0,1fr))}}
.hero__media img{width:280px;aspect-ratio:1/1;border-radius:50%;object-fit:cover;border:4px solid var(--primary-accent);box-shadow:var(--shadow-m);margin-inline:auto}
.quick-facts{list-style:none;margin:1.4rem 0 0;padding:0;display:flex;flex-wrap:wrap;gap:1.2rem;font-size:.85rem;color:var(--text-soft)}
.quick-facts a{text-decoration:underline;text-underline-offset:2px}

/* Header / Nav */
.site-header{position:sticky;top:0;z-index:60;backdrop-filter:saturate(180%) blur(14px);background:rgba(255,255,255,.78);border-bottom:1px solid var(--border);transition:background .4s}
html[data-theme="dark"] .site-header{background:rgba(15,20,27,.65)}
.brand__link{display:flex;align-items:center;gap:.75rem;font-weight:600}
.brand__logo{display:grid;place-items:center;height:44px;width:44px;border-radius:14px;background:var(--gradient-accent);color:#fff;font-weight:700;letter-spacing:.05em}
.nav__menu{--_gap:1.25rem;display:flex;align-items:center;gap:var(--_gap);list-style:none;margin:0;padding:0}
.nav__toggle{display:none;background:none;border:1px solid var(--border);padding:.55rem .75rem;border-radius:var(--radius-s)}
.nav__burger,.nav__burger::before,.nav__burger::after{content:"";display:block;width:20px;height:2px;background:var(--text);border-radius:2px;position:relative}
.nav__burger::before{position:absolute;top:-6px}
.nav__burger::after{position:absolute;top:6px}
@media (max-width:880px){
  .nav__toggle{display:inline-flex}
  .nav__menu{position:absolute;inset:62px 0 auto 0;flex-direction:column;align-items:flex-start;background:var(--bg-alt);padding:1.1rem 1.25rem;border-bottom:1px solid var(--border);transform:translateY(-125%);transition:.5s var(--ease);opacity:0;pointer-events:none}
  .nav__menu.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
}
.nav__menu a{position:relative;padding:.35rem .15rem;font-weight:500}
.nav__menu a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--primary);transition:.35s}
.nav__menu a:hover::after,.nav__menu a:focus-visible::after{width:100%}

/* Buttons */
.btn{--btn-bg:var(--primary);--btn-color:#fff;--btn-bg-hover:var(--primary-accent);display:inline-flex;align-items:center;gap:.5rem;background:var(--btn-bg);color:var(--btn-color);padding:.85rem 1.45rem;font-weight:600;border:none;border-radius:var(--radius-m);box-shadow:var(--shadow-s);transition:.3s var(--ease)}
.btn:hover,.btn:focus-visible{background:var(--btn-bg-hover)}
.btn--outline{--btn-bg:transparent;--btn-color:var(--primary);border:2px solid var(--primary);box-shadow:none}
.btn--outline:hover{--btn-bg:var(--primary);--btn-color:#fff}
.btn--sm{padding:.55rem 1rem;font-size:.85rem}

/* Cards / Containers */
.card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-l);padding:1.35rem 1.25rem;box-shadow:var(--shadow-xs);transition:border-color .3s,background .3s}
.card:hover{border-color:var(--primary)}
html[data-theme="dark"] .card{background:var(--bg-accent)}
.mt-l{margin-top:1.5rem}

/* Timeline */
.timeline{position:relative;margin:2.2rem 0;padding-left:1rem;border-left:3px solid var(--border)}
.timeline__item{position:relative;padding:0 0 2.4rem 1.45rem}
.timeline__marker{position:absolute;left:-1.03rem;top:.22rem;height:14px;width:14px;background:var(--gradient-accent);border-radius:50%;box-shadow:0 0 0 4px var(--bg)}
.job__title{font-size:1.05rem;margin:0 0 .3rem;font-weight:600}
.job__org{font-weight:700}
.job__meta{font-size:.8rem;color:var(--text-soft);margin:0 0 .8rem}
.bullets{margin:0 0 .85rem;padding-left:1.1rem}
.bullets li{margin:0 0 .45rem}
.bullets li::marker{color:var(--primary)}

/* Skills */
.skills-grid{display:grid;gap:1.6rem;margin-top:.5rem;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.skill-group h3{font-size:.83rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-soft);margin-bottom:.55rem}
.tags-list,.tags{display:flex;flex-wrap:wrap;gap:.45rem;margin:0;padding:0;list-style:none}
.tag{font-size:.68rem;font-weight:500;letter-spacing:.05em;padding:.38rem .65rem;border-radius:2rem;background:var(--tag);color:var(--tag-text);white-space:nowrap}
html[data-theme="dark"] .tag{background:#273040}

/* Metrics */
.key-metrics{list-style:none;margin:1.9rem 0 0;display:flex;flex-wrap:wrap;gap:2.2rem;padding:0}
.metric__value{font-size:1.85rem;font-weight:700;display:block;background:var(--gradient-accent);-webkit-background-clip:text;color:transparent}
.metric__label{font-size:.7rem;letter-spacing:.12em;font-weight:600;color:var(--text-soft);text-transform:uppercase}

/* Personal info list */
.info-grid{display:grid;grid-template-columns:140px 1fr;gap:.4rem .75rem;margin:1rem 0 0;font-size:.9rem}
.info-grid dt{font-weight:600;color:var(--text-soft)}
.info-grid dd{margin:0}

/* Education */
.edu-list{display:grid;gap:1.4rem;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));margin-top:.75rem}
.edu-item h3{margin:0 0 .35rem;font-size:1rem;line-height:1.3}
.edu-item__meta{font-size:.8rem;color:var(--text-soft);margin:0 0 .6rem}

/* Languages */
.language-list{list-style:none;margin:1rem 0 0;padding:0;font-size:.95rem}
.language-list li+li{margin-top:.45rem}

/* Contact */
.contact-grid{display:grid;gap:1.25rem;margin:1.25rem 0 2rem;grid-template-columns:repeat(auto-fit,minmax(190px,1fr))}
.contact-card h3{margin:0 0 .4rem;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--text-soft)}
.contact-form{max-width:620px}
.form-row{display:flex;flex-direction:column;margin-bottom:1rem}
.form-row label{font-size:.72rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;margin-bottom:.4rem}
.form-row input,.form-row textarea{border:1px solid var(--border);border-radius:var(--radius-s);background:var(--bg-accent);padding:.75rem .85rem;color:var(--text);resize:vertical;transition:border-color .3s,background .3s}
.form-row input:focus,.form-row textarea:focus{outline:none;border-color:var(--primary);background:var(--bg)}
.error{color:var(--danger);font-size:.68rem;min-height:1em}
.form-status{font-size:.75rem;margin-top:.7rem}

/* Footer */
.site-footer{background:var(--bg-alt);border-top:1px solid var(--border);padding:2.8rem 0;margin-top:4rem;font-size:.75rem}
.social{list-style:none;margin:0;padding:0;display:flex;gap:.75rem}
.social a{display:inline-flex;align-items:center;justify-content:center;height:36px;width:36px;border-radius:50%;background:var(--bg-accent);font-size:.7rem;font-weight:600}
.social a:hover{background:var(--primary);color:#fff}

/* Theme Toggle */
.theme-toggle{border:1px solid var(--border);background:var(--bg-accent);height:44px;width:44px;border-radius:var(--radius-m);display:inline-flex;align-items:center;justify-content:center;transition:.3s}
.theme-toggle:hover{border-color:var(--primary)}
.theme-toggle__icon::before{content:"🌗";font-size:1.05rem}

/* Scroll to top */
.to-top{position:fixed;right:1.25rem;bottom:1.25rem;height:46px;width:46px;border:none;border-radius:50%;background:var(--primary);color:#fff;font-size:1.15rem;box-shadow:var(--shadow-m);opacity:0;pointer-events:none;transition:.45s}
.to-top.is-visible{opacity:1;pointer-events:auto}

/* Utilities */
.check-list{list-style:none;margin:.8rem 0 0;padding:0;display:grid;gap:.45rem}
.check-list li{position:relative;padding-left:1.2rem;font-size:.9rem}
.check-list li::before{content:"";position:absolute;left:0;top:.42rem;height:.55rem;width:.55rem;border-radius:3px;background:var(--primary)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.mt-0{margin-top:0}

/* Animations */
[data-counter]{opacity:0;transform:translateY(6px);transition:700ms var(--ease)}
[data-counter].in{opacity:1;transform:translateY(0)}

/* Print */
@media print{
  .site-header,.nav__menu,.hero__actions,.theme-toggle,.to-top,.contact-form,.social{display:none !important}
  body{background:#fff;color:#000;font-size:12px}
  a{text-decoration:underline}
  .card,.timeline{border:1px solid #ccc;box-shadow:none}
  .section{padding:1.6rem 0}
  .hero{padding:2rem 0;grid-template-columns:1fr 200px}
  .hero__media img{border:none;box-shadow:none;width:180px}
}

@media (max-width:640px){
  .hero{padding:3rem 0}
  .section{padding:3.4rem 0}
  .key-metrics{gap:1.4rem}
}