*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#ffffff; --bg-alt:#f8f9fc; --bg-dark:#0f172a;
  --text:#0f172a; --muted:#64748b; --border:#e2e8f0;
  --primary:#6366f1; --primary-2:#4f46e5; --primary-light:#eef2ff;
  --radius:16px; --radius-sm:10px; --shadow:0 8px 30px rgba(15,23,42,.08);
  --shadow-lg:0 16px 40px rgba(15,23,42,.12);
}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 24px}
.section{padding:72px 0}
.section-alt{background:var(--bg-alt)}
.section-dark{background:var(--bg-dark);color:#e2e8f0}
.kicker{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--primary);font-weight:700}
.kicker-light{color:#818cf8}
.section-head h2{font-size:32px;line-height:1.15;font-weight:800;margin:8px 0 12px}
.section-head .sub{color:var(--muted);max-width:560px}
.section-head.row{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;align-items:flex-end}

/* NAV */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{font-weight:800;font-size:20px;display:flex;align-items:center;gap:8px}
.logo-mark{width:32px;height:32px;background:var(--primary);color:#fff;display:grid;place-items:center;border-radius:8px;font-size:16px}
.logo-dot{color:var(--primary)}
.nav-links{display:flex;gap:4px}
.nav-links a{padding:8px 14px;border-radius:999px;font-size:14px;font-weight:500;color:var(--muted)}
.nav-links a.active,.nav-links a:hover{background:var(--primary-light);color:var(--primary)}
.nav-cta{display:flex;gap:8px;align-items:center}
.hamburger{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:8px}
.hamburger span{width:22px;height:2px;background:var(--text);border-radius:2px;display:block}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:999px;font-weight:600;font-size:14px;border:1px solid transparent;cursor:pointer;transition:.18s;white-space:nowrap}
.btn-sm{padding:8px 14px;font-size:13px}
.btn-lg{padding:12px 22px;font-size:15px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-2);transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-ghost{background:#fff;border-color:var(--border);color:var(--text)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-outline{background:#fff;border-color:var(--text);color:var(--text)}
.btn-outline:hover{background:var(--text);color:#fff}
.btn-block{width:100%}

/* HERO */
.hero{padding:48px 0 56px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.2fr 0.8fr;gap:40px;align-items:center}
.hero-text{min-width:0}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);background:var(--bg-alt);border:1px solid var(--border);padding:6px 12px;border-radius:999px;margin-bottom:16px}
.eyebrow .dot{width:8px;height:8px;background:#10b981;border-radius:50%;box-shadow:0 0 0 6px rgba(16,185,129,.15)}
.hero h1{font-size:44px;line-height:1.05;font-weight:800;letter-spacing:-.03em}
.grad{background:linear-gradient(135deg,var(--primary),#06b6d4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.lead{margin:16px 0 20px;color:var(--muted);font-size:16px;line-height:1.6;max-width:540px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:20px}
.hero-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:14px 16px;background:var(--bg-alt);border:1px solid var(--border);border-radius:12px;margin-bottom:14px}
.meta-item{display:flex;flex-direction:column}
.meta-item strong{font-size:14px}
.meta-item span{font-size:12px;color:var(--muted)}
.meta-divider{width:1px;height:32px;background:var(--border)}
.hero-social{display:flex;gap:14px;font-size:13px;color:var(--muted)}
.hero-social a{border-bottom:1px dashed var(--border)}
.hero-social a:hover{color:var(--primary)}
.hero-visual{position:relative;display:flex;flex-direction:column;gap:16px;min-width:0;max-width:420px;width:100%;justify-self:end}
.hero-card{background:#0f172a;color:#e2e8f0;border-radius:16px;overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid #1e293b;max-width:100%}
.card-head{display:flex;align-items:center;gap:10px;padding:12px 16px;background:#1e293b;border-bottom:1px solid #334155;font-size:12px;color:#94a3b8}
.card-dots{display:flex;gap:6px}
.card-dots i{width:10px;height:10px;border-radius:50%;display:block}
.card-dots i:nth-child(1){background:#ef4444}.card-dots i:nth-child(2){background:#f59e0b}.card-dots i:nth-child(3){background:#10b981}
.code{padding:14px 16px;font-family:'JetBrains Mono',monospace;font-size:12px;line-height:1.6;overflow-x:auto;white-space:pre}
.code .c{color:#64748b}.code .k{color:#c084fc}.code .s{color:#34d399}.code .n{color:#fbbf24}
.hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;padding:12px 16px;background:#1e293b;border-top:1px solid #334155}
.h-stat{display:flex;flex-direction:column}
.h-stat-label{font-size:11px;color:#94a3b8;text-transform:uppercase;letter-spacing:.06em}
.h-stat-val{font-weight:800;font-size:18px}
.h-stat-val.down{color:#f87171}.h-stat-val.up{color:#34d399}
.hero-photo{position:relative;border-radius:16px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);height:200px;max-width:100%}
.hero-photo img{width:100%;height:100%;object-fit:cover;object-position:center}
.photo-badge{position:absolute;bottom:12px;left:12px;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);padding:8px 12px;border-radius:999px;font-size:12px;font-weight:600;box-shadow:var(--shadow)}

/* ABOUT */
.about-grid{display:grid;grid-template-columns:1.6fr .9fr;gap:32px;margin-top:28px}
.about-story p{color:var(--muted);margin-bottom:12px;font-size:15px}
.approach{margin-top:20px;background:var(--bg-alt);border:1px solid var(--border);border-radius:16px;padding:20px}
.approach h3{font-size:15px;margin-bottom:10px}
.approach ol{padding-left:18px;color:var(--muted);font-size:14px}
.approach li{margin-bottom:6px}
.approach li strong{color:var(--text)}
.info-card{background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px;margin-bottom:14px;box-shadow:var(--shadow)}
.info-card h4{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:12px}
.info-list{list-style:none;display:flex;flex-direction:column;gap:10px}
.info-list li{display:flex;justify-content:space-between;gap:12px;font-size:14px}
.info-list li span{color:var(--muted)}
.cert-list{list-style:none;display:flex;flex-direction:column;gap:8px;font-size:13px;color:var(--muted)}
.cert-list li{padding-left:14px;position:relative}
.cert-list li::before{content:"✓";position:absolute;left:0;color:var(--primary);font-weight:700}

/* PROJECTS */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap}
.filter-btn{padding:8px 14px;border-radius:999px;border:1px solid var(--border);background:#fff;font-size:13px;font-weight:600;cursor:pointer;color:var(--muted)}
.filter-btn.active{background:var(--text);color:#fff;border-color:var(--text)}
.project-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:24px}
.p-card{background:#fff;border:1px solid var(--border);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.2s}
.p-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.p-thumb{height:180px;overflow:hidden;position:relative}
.p-thumb img{width:100%;height:100%;object-fit:cover;transition:.3s}
.p-card:hover .p-thumb img{transform:scale(1.04)}
.p-cat{position:absolute;top:12px;left:12px;background:rgba(15,23,42,.84);color:#fff;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:6px 10px;border-radius:999px}
.p-body{padding:16px;display:flex;flex-direction:column;gap:10px;flex:1}
.p-body h3{font-size:16px;line-height:1.3}
.p-body p{font-size:13px;color:var(--muted);line-height:1.5}
.p-tags{display:flex;flex-wrap:wrap;gap:6px}
.p-tags span{font-size:11px;background:var(--bg-alt);border:1px solid var(--border);padding:4px 8px;border-radius:999px;font-weight:500}
.p-actions{display:flex;gap:8px;margin-top:auto;padding-top:8px}
.p-actions a{flex:1;text-align:center;padding:8px 10px;border-radius:999px;font-size:13px;font-weight:600;border:1px solid var(--border)}
.p-actions .primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.p-actions .ghost{background:#fff}
.hint{margin-top:14px;font-size:12px;color:var(--muted);text-align:center}

/* SKILLS */
.skills-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px}
.skill-group{background:#fff;border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:var(--shadow)}
.skill-group h3{font-size:15px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.sg-icon{width:32px;height:32px;background:var(--bg-alt);border-radius:8px;display:grid;place-items:center;font-size:16px}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.tags span{background:var(--primary-light);color:var(--primary);border:1px solid #c7d2fe;padding:5px 10px;border-radius:999px;font-size:12px;font-weight:600}
.skill-group p{font-size:13px;color:var(--muted)}

/* CONTACT */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.contact-text h2{font-size:32px;line-height:1.1;margin:8px 0 12px}
.contact-text p{color:#94a3b8;margin-bottom:20px}
.contact-links{list-style:none;display:flex;flex-direction:column;gap:12px}
.contact-links li{display:flex;flex-direction:column}
.contact-links li span{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:#64748b}
.contact-links a,.contact-links strong{color:#e2e8f0;font-weight:600}
.contact-links a:hover{color:#818cf8}
.contact-form{background:#fff;border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:14px;box-shadow:var(--shadow-lg)}
.contact-form label{font-size:13px;font-weight:600;color:var(--text);display:flex;flex-direction:column;gap:6px}
.contact-form input,.contact-form textarea{padding:10px 12px;border:1px solid var(--border);border-radius:10px;font:inherit;font-weight:400;background:#f8fafc}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px var(--primary-light)}
.form-note{font-size:11px;color:var(--muted);text-align:center}

/* CASE STUDY */
.case-hero{padding:36px 0 24px}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:12px}
.breadcrumb a{color:var(--primary);font-weight:600}
.case-hero h1{font-size:36px;line-height:1.1;font-weight:800;letter-spacing:-.02em;margin-bottom:10px}
.case-meta{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}
.case-thumb{height:360px;border-radius:16px;overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow)}
.case-thumb img{width:100%;height:100%;object-fit:cover}
.case-layout{display:grid;grid-template-columns:2fr 1fr;gap:32px;margin-top:28px}
.case-block{margin-bottom:28px}
.case-block h2{font-size:18px;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.case-block h2 span{width:28px;height:28px;background:var(--primary);color:#fff;border-radius:8px;display:grid;place-items:center;font-size:14px}
.case-block p,.case-block li{font-size:14px;color:var(--muted);line-height:1.7}
.case-block ul,.case-block ol{padding-left:18px}
.case-block li{margin-bottom:6px}
.insight-box{background:var(--primary-light);border:1px solid #c7d2fe;border-radius:12px;padding:16px;margin-top:10px}
.insight-box li{color:var(--text)}
.toc{position:sticky;top:80px;background:#fff;border:1px solid var(--border);border-radius:16px;padding:18px;box-shadow:var(--shadow)}
.toc h4{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.toc a{display:block;padding:6px 0;font-size:13px;color:var(--muted);border-left:2px solid transparent;padding-left:10px}
.toc a:hover{color:var(--primary);border-left-color:var(--primary)}
.toc .btn{margin-top:12px}

/* FOOTER */
.footer{border-top:1px solid var(--border);padding:20px 0;background:#fff}
.footer-inner{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.footer-links a:hover{color:var(--primary)}

/* RESPONSIVE */
@media(max-width:900px){
  .hero-grid,.about-grid,.contact-grid,.case-layout{grid-template-columns:1fr}
  .project-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:38px}
}
@media(max-width:640px){
  .nav-links{position:fixed;inset:64px 0 auto 0;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;padding:16px;gap:8px;display:none}
  .nav-links.open{display:flex}
  .nav-cta .btn-ghost{display:none}
  .hamburger{display:flex}
  .project-grid,.skills-grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .section{padding:48px 0}
  .case-thumb{height:220px}
}