*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --navy:#1a2744;--navy-light:#3a4f6f;--navy-dark:#0f1a2e;
  --cloud:#0ea5e9;--cloud-light:#e8f6fd;--cloud-muted:#e2eef5;
  --bg:#ffffff;--fg:#1e293b;--muted:#64748b;--border:#e2e8f0;
  --surface:#f8fafc;--card:#ffffff;--success:#22c55e;
  --secondary:#f0f2f5;--secondary-fg:#1a2744;
  --radius:0.625rem;
}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;color:var(--fg);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{font-weight:700;color:var(--navy)}
.container{max-width:1100px;margin:0 auto;padding:0 1rem}
.narrow{max-width:720px}

/* Navbar */
.navbar{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-container{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:1.1rem;color:var(--navy);text-decoration:none}
.nav-logo .cloud-icon{color:var(--cloud)}
.nav-links{display:flex;gap:24px}
.nav-links a{font-size:.875rem;font-weight:500;color:var(--muted);text-decoration:none;transition:color .2s}
.nav-links a:hover{color:var(--navy)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:4px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--fg);border-radius:2px;transition:.3s}
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border);flex-direction:column;padding:1rem}
  .nav-links.open{display:flex}
  .nav-links a{padding:8px 0}
  .nav-toggle{display:flex}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:var(--radius);font-size:.875rem;font-weight:600;text-decoration:none;border:none;cursor:pointer;transition:all .2s}
.btn-primary{background:var(--navy);color:#fff}.btn-primary:hover{background:var(--navy-light)}
.btn-outline{background:transparent;border:1px solid var(--navy);color:var(--navy)}.btn-outline:hover{background:var(--secondary)}
.btn-ghost{background:transparent;color:var(--muted);font-size:.8rem}.btn-ghost:hover{color:var(--navy)}
.btn-white{background:var(--bg);color:var(--navy)}.btn-white:hover{background:var(--secondary)}
.btn-sm{padding:6px 14px;font-size:.8rem}
.btn-full{width:100%;justify-content:center}

/* Hero */
.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;padding-top:64px;position:relative;overflow:hidden}
.hero-bg-blob{position:absolute;border-radius:50%;filter:blur(60px)}
.hero-blob-1{top:80px;right:40px;width:288px;height:288px;background:rgba(14,165,233,.1)}
.hero-blob-2{bottom:80px;left:40px;width:384px;height:384px;background:rgba(26,39,68,.05)}
.hero-content{text-align:center;max-width:720px;margin:0 auto;position:relative;z-index:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;border-radius:999px;background:var(--secondary);color:var(--secondary-fg);font-size:.875rem;font-weight:500;margin-bottom:24px}
.pulse-dot{width:8px;height:8px;border-radius:50%;background:var(--success);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:800;letter-spacing:-.02em;color:var(--navy);margin-bottom:16px}
.hero-subtitle{font-size:clamp(1rem,2.5vw,1.25rem);color:var(--muted);font-weight:500;margin-bottom:8px}
.hero-tagline{font-size:clamp(.95rem,2vw,1.1rem);color:var(--cloud);font-weight:600;margin-bottom:32px}
.hero-buttons{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:16px}
.scroll-indicator{margin-top:48px;animation:bounce 2s infinite}
.scroll-indicator a{color:var(--muted);transition:color .2s}.scroll-indicator a:hover{color:var(--navy)}
@keyframes bounce{0%,100%{transform:translateY(0)}50%{transform:translateY(8px)}}

/* Sections */
.section{padding:80px 0}
.section-alt{background:var(--surface)}
.section-title{font-size:1.875rem;font-weight:700;color:var(--navy);text-align:center;margin-bottom:48px}
.section-subtitle{text-align:center;color:var(--muted);max-width:560px;margin:-32px auto 40px}

/* About */
.about-text{color:var(--fg);line-height:1.7;margin-bottom:16px}
.about-text p{margin-bottom:16px}
.focus-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin:24px 0}
.focus-card{display:flex;align-items:flex-start;gap:12px;padding:16px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border)}
.focus-card svg{color:var(--cloud);flex-shrink:0;margin-top:2px}
.focus-card span{font-size:.875rem}

/* Skills */
.skills-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;max-width:960px;margin:0 auto}
.skill-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:box-shadow .2s,border-color .2s}
.skill-card:hover{box-shadow:0 4px 20px rgba(0,0,0,.08);border-color:rgba(14,165,233,.3)}
.skill-card svg{color:var(--cloud);margin-bottom:16px}
.skill-card h3{font-size:1.1rem;margin-bottom:12px}
.skill-tags{display:flex;flex-wrap:wrap;gap:8px}
.skill-tags span{padding:4px 10px;font-size:.75rem;font-weight:500;background:var(--secondary);color:var(--secondary-fg);border-radius:6px}

/* Certifications */
.cert-card{text-align:center;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:48px 32px;transition:box-shadow .2s}
.cert-card:hover{box-shadow:0 4px 20px rgba(0,0,0,.08)}
.cert-icon{width:96px;height:96px;margin:0 auto 24px;border-radius:var(--radius);background:linear-gradient(135deg,var(--navy),var(--navy-light));display:flex;align-items:center;justify-content:center}
.cert-icon svg{color:#fff}
.cert-card h3{font-size:1.25rem;margin-bottom:8px}
.cert-card p{color:var(--muted);margin-bottom:24px}

/* Projects */
.projects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;max-width:960px;margin:0 auto}
.project-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;transition:box-shadow .2s,border-color .2s}
.project-card:hover{box-shadow:0 4px 20px rgba(0,0,0,.08);border-color:rgba(14,165,233,.3)}
.project-card svg{color:var(--cloud);margin-bottom:16px}
.project-card h3{font-size:1.1rem;margin-bottom:8px}
.project-card p{font-size:.875rem;color:var(--muted);margin-bottom:16px;flex:1}
.project-card .skill-tags{margin-bottom:16px}

/* GitHub CTA */
.github-cta{max-width:640px;margin:0 auto;text-align:center;background:linear-gradient(135deg,var(--navy),var(--navy-light));border-radius:var(--radius);padding:48px;color:#fff}
.github-cta svg{color:#fff;margin:0 auto 16px;display:block}
.github-cta h2{color:#fff;font-size:1.5rem;margin-bottom:12px}
.github-cta p{color:rgba(255,255,255,.7);margin-bottom:24px}

/* Timeline / Experience */
.timeline{position:relative;padding-left:48px}
.timeline::before{content:'';position:absolute;left:23px;top:0;bottom:0;width:1px;background:var(--border)}
.timeline-item{position:relative;margin-bottom:32px}
.timeline-dot{position:absolute;left:-48px;width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--navy),var(--navy-light));display:flex;align-items:center;justify-content:center;z-index:1}
.timeline-dot svg{color:#fff}
.timeline-content{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px}
.timeline-header{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:4px;margin-bottom:8px}
.timeline-header h3{font-size:1rem}
.timeline-date{font-size:.75rem;font-family:'JetBrains Mono',monospace;color:var(--muted)}
.timeline-company{font-size:.875rem;font-weight:500;color:var(--cloud);margin-bottom:8px}
.timeline-content ul{margin-left:16px;list-style:disc outside}
.timeline-content li{font-size:.875rem;color:var(--muted);line-height:1.6;margin-bottom:6px}
@media(max-width:640px){.timeline{padding-left:0}.timeline::before{display:none}.timeline-dot{display:none}.timeline-content{margin-left:0}}

/* Architecture */
.diagram-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-bottom:24px}
.diagram-gallery .diagram-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.diagram-gallery img{width:100%;height:256px;object-fit:contain;background:var(--surface);padding:16px}
.diagram-gallery .diagram-name{padding:12px;border-top:1px solid var(--border);font-size:.875rem;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.upload-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:48px;text-align:center;background:var(--surface)}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
@media(max-width:640px){.contact-grid{grid-template-columns:1fr}}
.contact-info{display:flex;flex-direction:column;gap:12px}
.contact-info p{color:var(--muted);line-height:1.6;margin-bottom:12px}
.contact-form{display:flex;flex-direction:column;gap:16px}
.contact-form input,.contact-form textarea{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:.875rem;font-family:inherit;background:var(--card);color:var(--fg);outline:none;transition:border-color .2s}
.contact-form input:focus,.contact-form textarea:focus{border-color:var(--cloud)}

/* Footer */
.footer{background:var(--navy);color:#fff;padding:40px 0}
.footer-content{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}
.footer-brand{display:flex;align-items:center;gap:8px;font-size:.875rem}
.footer-brand svg{color:#fff}
.footer-links{display:flex;gap:16px}
.footer-links a{color:rgba(255,255,255,.7);transition:color .2s}.footer-links a:hover{color:#fff}

/* Animations */
.fade-in{opacity:0;transform:translateY(20px);transition:opacity .5s,transform .5s}
.fade-in.visible{opacity:1;transform:translateY(0)}