/* ===== Reset & variables ===== */
*{box-sizing:border-box}
html,body{margin:0;padding:0}
:root{
  --bg:#0b0f14; --bg-2:#0e1218; --text:#e8eef5; --muted:#b8c3cf;
  --card:rgba(255,255,255,0.06); --card-border:rgba(255,255,255,0.10);
  --accent:#7dd3fc; --accent-2:#c084fc; --link:#8bd0ff;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:18px; --pad:clamp(18px,2.4vw,28px); --maxw:1040px;
  --ease: cubic-bezier(.2,.8,.2,1);
}

/* Light mode (auto). Manual override via .theme-dark is supported. */
@media (prefers-color-scheme: light){
  :root{
    --bg:#f6f7fb; --bg-2:#eef1f7; --text:#0e1726; --muted:#495566;
    --card:rgba(255,255,255,.85); --card-border:rgba(10,20,30,.08);
    --link:#0d6efd; --shadow:0 8px 20px rgba(10,20,30,.10);
  }
}
:root.theme-dark{ --bg:#0b0f14; --bg-2:#0e1218; --text:#e8eef5; --muted:#b8c3cf; --card:rgba(255,255,255,.06); --card-border:rgba(255,255,255,.10); --link:#8bd0ff; --shadow:0 10px 30px rgba(0,0,0,.35); }

html{scroll-behavior:smooth}
body{
  font:16px/1.65 ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Inter,Helvetica,Arial;
  color:var(--text);
  background:
    radial-gradient(1200px 800px at -10% -10%, rgba(125,211,252,.10), transparent 50%),
    radial-gradient(1200px 800px at 110% 10%, rgba(192,132,252,.10), transparent 50%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
  min-height:100dvh;
}

/* noise overlay */
body::before{
  content:""; position:fixed; inset:0; pointer-events:none; opacity:.06; mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence baseFrequency='.7' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/><feComponentTransfer><feFuncA type='table' tableValues='0 0.22'/></feComponentTransfer></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  background-size:320px;
}

.container{max-width:var(--maxw); margin:0 auto; padding:20px}

/* ===== Progress bar ===== */
#progress{
  position:fixed; inset:0 0 auto 0; height:4px; background:linear-gradient(90deg,var(--accent),var(--accent-2));
  transform-origin:left; transform:scaleX(0); z-index:60; pointer-events:none;
}

/* ===== Top nav ===== */
.topnav{position:sticky; top:0; z-index:50; backdrop-filter:blur(10px); background:linear-gradient(180deg,rgba(0,0,0,.18),rgba(0,0,0,0));}
.nav-inner{display:flex; align-items:center; justify-content:space-between; gap:16px}
.brand{display:flex; align-items:center; gap:10px; font-weight:700; text-decoration:none; color:var(--text)}
.brand .logo{font-size:22px}
.navlinks{display:flex; align-items:center; gap:14px; list-style:none; margin:0; padding:10px 0}
.navlinks a{color:var(--text); text-decoration:none; padding:8px 10px; border-radius:10px; transition:background .2s var(--ease)}
.navlinks a:hover{background:rgba(255,255,255,.06)}
.navlinks a.active{background:rgba(125,211,252,.22)}
.hamburger{display:none; background:var(--card); border:1px solid var(--card-border); color:var(--text); border-radius:12px; padding:8px 12px}

/* ===== Hero ===== */
.hero{position:relative; overflow:hidden; padding:48px 0 24px}
.hero-inner{display:grid; grid-template-columns:1.2fr .8fr; gap:24px; align-items:center}
.hero h1{margin:0 0 6px 0; font-size:clamp(28px,4vw,40px); font-weight:800;
  background:linear-gradient(90deg,var(--accent),var(--accent-2)); -webkit-background-clip:text; color:transparent}
.subtitle{margin:0 0 14px 0; color:var(--muted)}
.cta{display:flex; gap:10px; flex-wrap:wrap}
.btn{display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:10px 16px; border-radius:12px; border:1px solid var(--card-border); background:var(--card); color:var(--text); text-decoration:none; transition:transform .2s var(--ease), background .2s var(--ease); backdrop-filter:blur(8px)}
.btn:hover{transform:translateY(-1px)}
.btn.ghost{background:transparent}
.btn.tiny{padding:6px 10px; font-size:13px}

.hero-orb{width:320px; height:320px; border-radius:50%;
  background:radial-gradient(circle at 30% 30%, rgba(125,211,252,.7), rgba(192,132,252,.6) 45%, transparent 60%);
  filter:blur(18px); animation:float 10s ease-in-out infinite alternate; justify-self:end}
@keyframes float{to{transform:translateY(-16px) translateX(10px)}}

/* ===== Theme toggle ===== */
.toggle{display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px; border:1px solid var(--card-border); background:var(--card); color:var(--text); cursor:pointer}
.toggle .dot{width:16px; height:16px; border-radius:50%; background:var(--accent-2)}

/* ===== Cards & section headings ===== */
.card{background:var(--card); border:1px solid var(--card-border); border-radius:var(--radius); box-shadow:var(--shadow); padding:var(--pad); margin:18px 0}
h2{display:flex; align-items:center; gap:8px; margin:0 0 10px 0}
h2 .dot{width:10px; height:10px; border-radius:50%; background:linear-gradient(90deg,var(--accent),var(--accent-2))}

/* ===== Projects ===== */
.filters{display:flex; gap:8px; flex-wrap:wrap; margin:4px 0 12px}
.chip{padding:6px 12px; border-radius:999px; border:1px solid var(--card-border); background:rgba(255,255,255,.05); color:var(--text); cursor:pointer}
.chip.active{outline:2px solid rgba(125,211,252,.5)}
.project-list{display:grid; gap:14px}
.project{padding:16px; border-radius:16px; border:1px solid var(--card-border); background:rgba(255,255,255,.04); transition:transform .22s var(--ease), border-color .22s var(--ease), background .22s var(--ease)}
.project:hover{transform:translateY(-2px); border-color:rgba(125,211,252,.35); background:rgba(125,211,252,.06)}
.project h3{margin:6px 0 8px; font-size:18px}
.project a{text-decoration:none; color:var(--text); border-bottom:1px dashed transparent}
.project a:hover{color:var(--link); border-color:var(--link)}
.project .badges{margin-bottom:6px}
.badge{display:inline-block; font-size:12px; padding:4px 10px; border-radius:999px; margin-right:6px; background:rgba(255,255,255,.08); border:1px solid var(--card-border); color:var(--muted)}
.project .actions{margin-top:10px; display:flex; gap:8px}

/* clamp + expand */
.clamp{display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; color:var(--muted)}
.clamp.expanded{-webkit-line-clamp:unset}

/* ===== Lists & footer ===== */
ul{padding-left:18px}
.site-footer{text-align:center; font-size:15px}

/* ===== Back to top ===== */
.to-top{position:fixed; bottom:18px; right:18px; width:42px; height:42px; border-radius:50%; border:1px solid var(--card-border); background:var(--card); color:var(--text); box-shadow:var(--shadow); display:grid; place-items:center; opacity:0; visibility:hidden; transform:translateY(6px); transition:opacity .2s var(--ease), transform .2s var(--ease), visibility .2s var(--ease); z-index:40}
.to-top.show{opacity:1; visibility:visible; transform:translateY(0)}

/* ===== Reveal-on-scroll ===== */
.reveal{opacity:0; transform:translateY(12px); transition:opacity .5s var(--ease), transform .5s var(--ease)}
.reveal.visible{opacity:1; transform:none}

/* ===== Responsive ===== */
@media (max-width:860px){
  .hero-inner{grid-template-columns:1fr; gap:12px}
  .hero-orb{justify-self:center; width:260px; height:260px}
}
@media (max-width:760px){
  .hamburger{display:block}
  .navlinks{position:absolute; top:56px; right:16px; left:16px; flex-direction:column; padding:12px; border:1px solid var(--card-border); background:var(--card); backdrop-filter:blur(8px); border-radius:16px; display:none}
  .navlinks.open{display:flex}
  .navlinks li{width:100%}
  .navlinks a, .navlinks .toggle{width:100%; display:flex; justify-content:center}
}