:root{--bg:#f8fafc;--surface:#ffffff;--muted:#475569;--txt:#0f172a;--accent:#0ea5e9;--accent-2:#2563eb;--ring:0 0 0 2px color-mix(in srgb, var(--accent) 40%, transparent)}
html[data-theme="dark"]{--bg:#0b1220;--surface:#0f172a;--muted:#8892a6;--txt:#e5e7eb;--accent:#22d3ee;--accent-2:#60a5fa}

/* Smooth theme transition (respects reduced-motion) */
@media (prefers-reduced-motion: no-preference){
  html.theme-animating, html.theme-animating *{
    transition: background-color .25s ease, color .25s ease, border-color .25s ease, outline-color .25s ease, fill .25s ease, stroke .25s ease;
  }
}

/* Page entrance + scroll reveal */
@media (prefers-reduced-motion: no-preference){
  .reveal{opacity:0;transform:translateY(14px)}
  html.ready .reveal{opacity:1;transform:none;transition:opacity .5s ease, transform .5s ease}
  /* allow stagger with data-delay (ms) */
  .reveal[data-delay]{transition-delay:calc(attr(data-delay ms) * 1ms)}
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Inter,system-ui,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--txt);line-height:1.6}
.container{width:min(1100px,calc(100% - 2rem));margin-inline:auto}
.section{padding:4rem 0}
.site-header{position:sticky;top:0;z-index:10;background:color-mix(in srgb,var(--surface) 92%, transparent);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid color-mix(in srgb,var(--muted) 20%, transparent)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem 0}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--txt);font-weight:600}
.brand-mark{border-radius:6px}
.brand-name{letter-spacing:.2px}
.nav-toggle{display:none;background:none;border:0;padding:.25rem;border-radius:.5rem;color:var(--txt)}
.nav-toggle:focus-visible{outline:var(--ring)}
.nav-toggle-bar{display:block;width:20px;height:2px;background:var(--txt);margin:4px 0;border-radius:2px}
.nav-list{display:flex;gap:1.25rem;list-style:none;margin:0;padding:0}
.nav-list a{text-decoration:none;color:var(--muted)}
.nav-list a:hover{color:var(--txt)}
.header-actions{display:flex;gap:.75rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;height:40px;padding:0 .9rem;border-radius:.6rem;border:1px solid color-mix(in srgb,var(--muted) 30%, transparent);color:var(--txt);background:transparent;text-decoration:none}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));border-color:transparent;color:#001018}
.btn-ghost:hover{background:color-mix(in srgb,var(--muted) 12%, transparent)}
.btn:focus-visible{outline:var(--ring)}
.visually-hidden{position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;border:0;clip:rect(0 0 0 0);overflow:hidden}
.skip-link{position:absolute;left:-999px;top:auto;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:1rem;top:1rem;width:auto;height:auto;background:var(--surface);padding:.5rem .75rem;border-radius:.5rem}
.hero{padding-top:5rem}
.hero-title{font-size:clamp(2rem,4vw+1rem,3rem);line-height:1.1;margin:0}
.lead{font-size:1.125rem;color:var(--muted);margin-top:.75rem}
.accent{background:linear-gradient(135deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.grid-2{display:grid;grid-template-columns:1.2fr .8fr;gap:2rem}
.hero-center{display:flex;flex-direction:column;align-items:center;gap:1.25rem;text-align:center}
.hero-intro{max-width:800px}
.stack{display:flex;flex-direction:column;gap:1rem}
.md\:gap-4{gap:1.25rem}
.card{background:var(--surface);border:1px solid color-mix(in srgb,var(--muted) 18%, transparent);border-radius:1rem;overflow:hidden}
.card-body{padding:1.25rem}
.card-title{margin:0 0 .25rem 0}
.muted{color:var(--muted)}
.xs{font-size:.85rem}
.inline-list{display:flex;flex-wrap:wrap;gap:.5rem;list-style:none;padding:0;margin:0}
.chip{display:inline-flex;align-items:center;padding:.35rem .6rem;border-radius:999px;border:1px solid color-mix(in srgb,var(--muted) 30%, transparent);text-decoration:none;color:var(--muted)}
.chip:hover{background:color-mix(in srgb,var(--muted) 12%, transparent);color:var(--txt)}
.profile-card{display:flex;flex-direction:column;align-items:center;text-align:center}
.profile-photo{width:140px;height:140px;object-fit:cover;border-radius:999px;margin:1.25rem 0 0}
.section-title{font-size:1.6rem;margin:0 0 1rem}
.skills-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.75rem;list-style:none;padding:0;margin:0}
.skill{padding:.8rem 1rem;border:1px dashed color-mix(in srgb,var(--muted) 35%, transparent);border-radius:.8rem;background:color-mix(in srgb,var(--surface) 70%, transparent)}
.feature-list{margin:1rem 0;padding-left:1.5rem;color:var(--muted)}
.feature-list li{margin:.5rem 0}
.timeline{display:grid;gap:1rem}
.timeline-item{background:var(--surface);border:1px solid color-mix(in srgb,var(--muted) 18%, transparent);border-radius:1rem;overflow:hidden}
.timeline-header{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;padding:1rem 1.25rem;border-bottom:1px solid color-mix(in srgb,var(--muted) 14%, transparent)}
.projects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}
.project .card-actions{display:flex;gap:.5rem;margin-top:.5rem}
.field{display:grid;gap:.35rem;margin:.5rem 0}
.services-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem}
.service-card{transition:transform .25s ease, box-shadow .2s ease}
.service-card:hover{transform:translateY(-6px);box-shadow:0 8px 24px rgba(6,22,38,0.08)}
.services-grid{margin-top:1.5rem}
.card-actions{margin-top:1rem}
.field input,.field textarea{background:transparent;border:1px solid color-mix(in srgb,var(--muted) 30%, transparent);border-radius:.6rem;padding:.6rem .75rem;color:var(--txt)}
.field input:focus,.field textarea:focus{outline:var(--ring)}
.site-footer{border-top:1px solid color-mix(in srgb,var(--muted) 20%, transparent);padding:2rem 0}
.footer-inner{display:flex;align-items:center;justify-content:space-between}

/* Smooth profile switch */
.content-anim{transition:opacity .25s ease, transform .25s ease}
.content-anim.fade-out{opacity:0;transform:translateY(8px)}

@media (max-width: 900px){
  .grid-2{grid-template-columns:1fr}
  .nav-toggle{display:inline-flex}
  .nav-list{position:fixed;inset:auto 0 0 0;background:var(--surface);padding:1rem 1.25rem;border-top:1px solid color-mix(in srgb,var(--muted) 20%, transparent);transform:translateY(100%);transition:transform .25s ease}
  .nav-list.open{transform:translateY(0)}
  .hero-center{padding-top:1rem}
}

html[data-theme="dark"]{--bg:#0b1220;--surface:#0f172a;--muted:#8892a6;--txt:#e5e7eb;--accent:#22d3ee;--accent-2:#60a5fa}