/* Design tokens from design-system.json */
:root{
  --bg:#F6FAFF;--bg-2:#FFFFFF;--text:#0F172A;--muted:#475569;--accent:#3B82F6;--accent-2:#60A5FA;--border:#E5EEF7;
  --container:1200px;--space:8px;--shadow-soft:0 6px 20px rgba(15,23,42,0.08);--glow:0 0 40px rgba(59,130,246,0.28);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Poppins,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:80px 0}
.center{text-align:center}
.row-between{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.7);backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{font-weight:700;font-size:1.125rem;color:var(--text);text-decoration:none}
.nav-links{display:flex;align-items:center;gap:14px}
.nav-links button,.nav-links a{background:none;border:0;color:var(--muted);cursor:pointer;padding:10px 12px;border-radius:4px}
.nav-links button:hover,.nav-links a:hover{color:var(--text);background:#EAF3FF}
.btn.small{padding:.5rem .9rem;border:1px solid var(--border);border-radius:4px;color:var(--text);text-decoration:none}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:1px solid var(--border);padding:8px;border-radius:4px}
.hamburger span{width:22px;height:2px;background:var(--text)}
.mobile-menu{display:none;flex-direction:column;padding:10px 16px;border-top:1px solid var(--border);background:var(--bg)}
.mobile-menu.show{display:flex}
@media (max-width: 820px){.nav-links{display:none}.hamburger{display:flex}}

/* Hero */
.hero{position:relative}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center}
.eyebrow{color:var(--accent-2);letter-spacing:.08em;font-weight:600}
.hero-title{font-size:3rem;line-height:1.15;margin:.25rem 0;font-weight:700;letter-spacing:-.4px}
.hero-role{font-size:1.25rem;color:var(--muted);margin:.25rem 0 .75rem}
.hero-desc{color:#d7d7d7}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:14px}
.btn{display:inline-block;padding:.75rem 1.5rem;border-radius:6px;font-weight:600;text-decoration:none;transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease}
.btn.primary{background:var(--accent);color:#fff;box-shadow:var(--glow)}
.btn.primary:hover{filter:brightness(1.2)}
.btn.outlined{border:1px solid var(--accent);color:var(--accent);background:#EAF3FF}
.btn.outlined:hover{background:#DBEAFE}
.photo-wrap{position:relative;width:260px;height:260px;border-radius:6px;overflow:hidden;margin:0 auto;box-shadow:0 6px 18px rgba(15,23,42,0.08)}
.photo-wrap img{width:100%;height:100%;object-fit:cover}
.hero-glow{position:absolute;inset:0;background:radial-gradient(circle, rgba(59,130,246,.16), transparent 55%);filter:blur(24px);opacity:.8;pointer-events:none}
@media (max-width: 980px){.hero-inner{grid-template-columns:1fr}.photo-wrap{width:220px;height:220px}}

/* Surfaces */
.surface{background:var(--bg-2);border:1px solid var(--border);border-radius:6px;box-shadow:0 8px 24px rgba(15,23,42,0.06);padding:28px}

/* About */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.section-title{font-size:2rem;margin:0 0 8px}
.section-text{color:#d7d7d7;margin:0 0 14px}
.timeline{list-style:none;margin:18px 0 0;padding:0}
.timeline li{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px dashed var(--border)}
.timeline .dot{width:10px;height:10px;border-radius:2px;background:var(--accent);margin-top:8px;box-shadow:0 0 10px rgba(59,130,246,.3)}
.stats{display:flex;gap:12px;flex-wrap:wrap;margin:8px 0 16px}
.stat{min-width:110px;background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:14px;text-align:center}
.stat .num{font-size:1.25rem;font-weight:700}
.stat .label{font-size:.875rem;color:var(--muted)}

/* Skills bar */
.section-sub{color:var(--muted);margin:6px 0 20px}
.skills-bar{display:flex;gap:12px;overflow:auto;padding:12px;border:1px solid var(--border);border-radius:6px;background:var(--bg-2)}
.skills-bar::-webkit-scrollbar{height:8px}
.skills-bar::-webkit-scrollbar-thumb{background:var(--border);border-radius:8px}
.skills-bar span{white-space:nowrap;color:#0F172A;padding:10px 14px;border-radius:6px;background:#F0F7FF;border:1px solid #D8E8FF}
.skills-bar span:hover{box-shadow:0 0 0 4px rgba(59,130,246,.18)}

/* Education */
.edu-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:12px}
.edu-card{background:var(--bg-2);border:1px solid var(--border);border-radius:6px;box-shadow:0 8px 24px rgba(15,23,42,0.06);padding:18px}
.edu-card .meta{color:var(--muted);margin:.25rem 0 .5rem}
@media (max-width: 820px){.about-grid,.edu-grid{grid-template-columns:1fr}}

/* Works */
.filters{display:flex;gap:8px;flex-wrap:wrap}
.filters button{padding:8px 12px;border-radius:6px;border:1px solid var(--border);background:#EFF6FF;color:#0F172A;cursor:pointer}
.filters button.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:14px}
@media (max-width: 1024px){.projects-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width: 640px){.projects-grid{grid-template-columns:1fr}}
.card{background:var(--bg-2);border:1px solid var(--border);border-radius:6px;overflow:hidden;box-shadow:0 8px 24px rgba(15,23,42,0.06);transition:transform .2s ease,box-shadow .2s ease}
.card:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(15,23,42,.12)}
.card .media{position:relative}
.card img{width:100%;height:180px;object-fit:cover}
.card .overlay{position:absolute;inset:auto 12px 12px 12px;display:flex;gap:8px;opacity:0;transform:translateY(6px);transition:all .2s ease}
.card:hover .overlay{opacity:1;transform:translateY(0)}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{background:#EBF3FF;border:1px solid #D8E8FF;padding:4px 8px;border-radius:6px;font-size:.8125rem;color:#0F172A}
.card .body{padding:14px}

/* Contact */
.site-footer{border-top:1px solid var(--border);padding:18px 0;color:#475569}
.quick-links{display:flex;gap:12px;flex-wrap:wrap}

/* Animations / reduced motion */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.show{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}html{scroll-behavior:auto}}

.root{--shadow-sm:0 1px 2px rgba(0,0,0,.06);--shadow-md:0 8px 24px rgba(0,0,0,.08);--radius:16px}
:root{--bg:#ffffff;--text:#0f172a;--muted:#475569;--border:#e2e8f0;--accent:#0ea5e9;--card:#ffffff;--elev:rgba(15,23,42,.04)}
.dark{--bg:#0b1220;--text:#e5f0ff;--muted:#c8d3e0;--border:#1f2b3d;--accent:#22c3ee;--card:#0b1220;--elev:rgba(0,0,0,.25)}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,Poppins,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,"Apple Color Emoji","Segoe UI Emoji";line-height:1.55}
.container{max-width:1120px;margin:0 auto;padding:0 20px}
.navbar{position:sticky;top:0;background:color-mix(in oklab,var(--bg) 92%,transparent);backdrop-filter:saturate(1.2) blur(10px);border-bottom:1px solid color-mix(in oklab,var(--border) 70%,transparent);z-index:50}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{font-weight:800;letter-spacing:.5px;background:linear-gradient(90deg,#38bdf8,#0ea5e9 60%,#06b6d4);-webkit-background-clip:text;background-clip:text;color:transparent;border:0;background-color:transparent;cursor:pointer}
.nav-links{display:flex;align-items:center;gap:16px}
.nav-links button{background:none;border:0;color:var(--muted);cursor:pointer;padding:8px 10px;border-radius:8px}
.nav-links button:hover{background:color-mix(in oklab,var(--border) 40%,transparent);color:var(--text)}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;padding:8px;border-radius:12px;background:color-mix(in oklab,var(--bg) 60%,transparent);border:1px solid color-mix(in oklab,var(--border) 70%,transparent);box-shadow:var(--shadow-sm);cursor:pointer;transition:transform .2s ease,background .2s ease}
.icon-btn:hover{transform:translateY(-1px)}
.menu-btn{display:none;flex-direction:column;gap:4px;padding:8px 6px;border:1px solid color-mix(in oklab,var(--border) 70%,transparent);border-radius:8px;background:none}
.menu-btn span{display:block;width:20px;height:2px;background:var(--text)}
.mobile-menu{display:none;flex-direction:column;padding:10px 16px;border-top:1px solid var(--border);background:var(--bg)}
.mobile-menu button{background:none;border:0;text-align:left;padding:10px;border-radius:8px;color:var(--muted)}
.mobile-menu button:hover{background:color-mix(in oklab,var(--border) 40%,transparent);color:var(--text)}
@media (max-width: 760px){.nav-links{display:none}.menu-btn{display:flex}.mobile-menu.show{display:flex}}

.section{padding:84px 0}
.hero{min-height:72vh;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;background:
  radial-gradient(600px 200px at 50% -40%, color-mix(in oklab,var(--accent) 20%,transparent), transparent 60%),
  radial-gradient(400px 160px at 10% 10%, color-mix(in oklab,var(--accent) 12%,transparent), transparent 60%),
  radial-gradient(400px 160px at 90% 20%, color-mix(in oklab,var(--accent) 12%,transparent), transparent 60%);
  filter: blur(20px); opacity:.6}
.badge{display:inline-block;margin-bottom:12px;padding:6px 10px;border-radius:999px;background:color-mix(in oklab,var(--accent) 16%,var(--bg));color:color-mix(in oklab,#fff 90%,var(--text));border:1px solid color-mix(in oklab,var(--accent) 40%,transparent);font-weight:600;font-size:12px;letter-spacing:.02em}
.hero-title{font-size:48px;line-height:1.1;margin:0 0 10px;font-weight:800;letter-spacing:-.02em}
.accent-gradient{background:linear-gradient(90deg,#38bdf8,#0ea5e9 60%,#22d3ee);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{color:var(--muted);margin:0 0 22px}
.cta{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.btn{display:inline-block;padding:12px 18px;border-radius:12px;font-weight:600;text-decoration:none;transition:transform .2s ease,box-shadow .2s ease}
.btn.primary{background:var(--accent);color:#fff}
.btn.primary:hover{box-shadow:0 10px 30px color-mix(in oklab,var(--accent) 30%,transparent);transform:translateY(-1px)}
.btn.outline{border:1px solid var(--border);color:var(--text)}
.btn.outline:hover{background:color-mix(in oklab,var(--border) 40%,transparent)}

.grid-2{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center}
.surface{background:linear-gradient(180deg, color-mix(in oklab,var(--card) 92%,transparent), color-mix(in oklab,var(--card) 96%,transparent));
  border:1px solid var(--border); border-radius:20px; padding:28px; box-shadow:var(--shadow-md)}
.stats{display:flex;gap:16px;margin:16px 0 12px;flex-wrap:wrap}
.stat{display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:14px 16px;min-width:100px;box-shadow:var(--shadow-sm)}
.stat .num{font-size:20px;font-weight:800}
.stat .label{font-size:12px;color:var(--muted)}
@media (max-width: 900px){.grid-2{grid-template-columns:1fr;}}
.profile img{width:220px;height:220px;object-fit:cover;border-radius:24px;border:1px solid var(--border);box-shadow:var(--shadow-md);background:var(--card)}
.row-gap{display:flex;gap:10px;flex-wrap:wrap}
.center{text-align:center}

.skills-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
@media (max-width: 1024px){.skills-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width: 560px){.skills-grid{grid-template-columns:repeat(2,1fr)}}
.skill-card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;text-align:center;box-shadow:var(--shadow-sm)}

.row-between{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.filters{display:flex;gap:8px;flex-wrap:wrap}
.filters button{padding:8px 12px;border-radius:999px;border:1px solid var(--border);background:none;cursor:pointer}
.filters button.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.projects-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width: 1024px){.projects-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width: 640px){.projects-grid{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--border);border-radius:20px;overflow:hidden;box-shadow:var(--shadow-md);transition:transform .25s ease,box-shadow .25s ease}
.card .media{position:relative}
.card .media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent,rgba(0,0,0,.35));opacity:0;transition:opacity .25s ease}
.card:hover .media::after{opacity:1}
.card .overlay{position:absolute;bottom:10px;left:10px;right:10px;display:flex;gap:8px;opacity:0;transform:translateY(6px);transition:opacity .25s ease,transform .25s ease}
.card:hover .overlay{opacity:1;transform:translateY(0)}
.card:hover{transform:translateY(-2px);box-shadow:0 16px 48px color-mix(in oklab,#000 16%,transparent)}
.card img{width:100%;height:160px;object-fit:cover}
.card .body{padding:14px}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{background:color-mix(in oklab,var(--border) 60%,transparent);padding:4px 8px;border-radius:999px;font-size:12px}
.card .actions{display:flex;gap:8px;padding:0 14px 14px}

.form{display:flex;flex-direction:column;gap:12px}
.form label{display:flex;flex-direction:column;gap:6px;font-size:14px}
.form input,.form textarea{padding:12px 14px;border-radius:12px;border:1px solid var(--border);background:var(--card);color:var(--text);transition:border-color .2s ease,box-shadow .2s ease}
.form input:focus,.form textarea:focus{outline:none;border-color:color-mix(in oklab,var(--accent) 60%,var(--border));box-shadow:0 0 0 4px color-mix(in oklab,var(--accent) 18%,transparent)}
.contact-surface{background-image:radial-gradient(20px 20px at 10% 10%, color-mix(in oklab,var(--accent) 8%,transparent) 20%, transparent 21%), radial-gradient(18px 18px at 80% 20%, color-mix(in oklab,var(--accent) 8%,transparent) 20%, transparent 21%)}
.alert{min-height:22px;margin-bottom:4px;font-size:14px}
.alert.success{color:#10b981}
.alert.error{color:#ef4444}

.footer{border-top:1px solid var(--border);padding:22px 0;margin-top:36px}
.quick-links{display:flex;gap:12px;flex-wrap:wrap}

/* reveal animations */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.reveal.show{opacity:1;transform:translateY(0)}

@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}

/* theme icon states */
#icon-moon{display:none}
.dark #icon-moon{display:block}
.dark #icon-sun{display:none}