*{margin:0;padding:0;box-sizing:border-box}
:root{
    --indigo-50:#EEF2FF;--indigo-200:#C7D2FE;--indigo-400:#818CF8;--indigo-600:#4F46E5;--indigo-800:#3730A3;
    --emerald-50:#ECFDF5;--emerald-400:#34D399;--emerald-600:#059669;--emerald-800:#065F46;
    --amber-50:#FFFBEB;--amber-400:#FBBF24;--amber-600:#D97706;--amber-800:#92400E;
    --slate-50:#F8FAFC;--slate-100:#F1F5F9;--slate-200:#E2E8F0;--slate-400:#94A3B8;--slate-600:#64748B;--slate-800:#334155;
    --rose-50:#FFF1F2;--rose-400:#FB7185;--rose-600:#E11D48;--rose-800:#9F1239;
    --bg:#FAFBFF;--bg-card:rgba(255,255,255,.72);--bg-card-hover:rgba(255,255,255,.92);
    --text:#1e293b;--text-dim:#64748b;--text-muted:#94a3b8;
    --border:rgba(0,0,0,.06);--border-hover:rgba(79,70,229,.15);
    --glass:rgba(250,251,255,.7);
}
body{font-family:'SF Pro Display',-apple-system,BlinkMacSystemFont,'Segoe UI',system-ui,sans-serif;color:var(--text);background:var(--bg);overflow-x:hidden;min-height:100vh}

/* Background */
.bg-gradient{position:fixed;top:0;left:0;width:100%;height:100%;z-index:0;pointer-events:none;overflow:hidden}
.bg-orb{position:absolute;border-radius:50%;filter:blur(100px);opacity:.2;animation:orbFloat 25s ease-in-out infinite alternate}
.bg-orb:nth-child(1){width:700px;height:700px;background:#c7d2fe;top:-15%;left:-10%;animation-delay:0s}
.bg-orb:nth-child(2){width:550px;height:550px;background:#fbcfe8;top:35%;right:-10%;animation-delay:-7s}
.bg-orb:nth-child(3){width:500px;height:500px;background:#a7f3d0;bottom:-10%;left:25%;animation-delay:-14s}
@keyframes orbFloat{0%{transform:translate(0,0) scale(1)}33%{transform:translate(30px,-40px) scale(1.05)}66%{transform:translate(-20px,30px) scale(.95)}100%{transform:translate(10px,-10px) scale(1)}}

/* Grid overlay */
body::before{content:'';position:fixed;top:0;left:0;width:100%;height:100%;background-image:linear-gradient(rgba(0,0,0,.015) 1px,transparent 1px),linear-gradient(90deg,rgba(0,0,0,.015) 1px,transparent 1px);background-size:60px 60px;z-index:0;pointer-events:none}

/* Loading */
.loading{position:fixed;top:0;left:0;width:100%;height:100%;background:var(--bg);display:flex;align-items:center;justify-content:center;z-index:9999;font-family:monospace;font-size:20px;color:var(--indigo-400)}
.loading::after{content:'';display:block;width:36px;height:36px;border:3px solid var(--indigo-200);border-top-color:var(--indigo-600);border-radius:50%;animation:spin .8s linear infinite;margin-left:16px}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-error{color:var(--rose-400)!important}

/* Error State */
.error-state{display:flex;flex-direction:column;align-items:center;gap:12px;padding:3rem;text-align:center}
.error-icon{font-size:3rem;color:var(--rose-400)}
.error-text{color:var(--text-dim);font-size:16px}
.error-btn{padding:10px 24px;border:none;border-radius:10px;background:var(--indigo-600);color:#fff;font-size:14px;cursor:pointer;font-weight:500;transition:all .2s}
.error-btn:hover{background:var(--indigo-800);transform:translateY(-2px)}

/* Container */
.container{max-width:1100px;margin:0 auto;padding:0 24px;position:relative;z-index:1}

/* Floating Code */
.floating-code{position:fixed;font-family:'SF Mono','Fira Code',monospace;font-size:12px;color:var(--indigo-400);opacity:.1;pointer-events:none;white-space:nowrap;z-index:0;width:100%}
.floating-code code{position:fixed}
.floating-code code:nth-child(1){top:15%;right:5%;animation:floatCode 20s linear infinite}
.floating-code code:nth-child(2){bottom:20%;left:3%;animation:floatCode 25s linear infinite reverse}
@keyframes floatCode{0%{transform:translateY(0) rotate(-2deg)}50%{transform:translateY(-20px) rotate(2deg)}100%{transform:translateY(0) rotate(-2deg)}}

/* Navbar */
.navbar{padding:16px 40px;position:fixed;top:0;left:0;right:0;background:rgba(250,251,255,.82);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);z-index:100;border-bottom:1px solid var(--border);transition:all .3s}
.navbar.scrolled{padding:12px 40px;background:rgba(250,251,255,.95)}
.nav-container{max-width:1100px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-weight:600;font-size:18px;color:var(--text)}
.nav-logo span{color:var(--indigo-600)}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-size:14px;color:var(--text-dim);text-decoration:none;transition:color .3s;cursor:pointer;position:relative;padding:4px 0}
.nav-links a:hover,.nav-links a.active{color:var(--indigo-600)}
.nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:var(--indigo-600);transition:width .3s}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-toggle{display:none;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--text-dim);margin:4px 0;transition:all .3s}

/* Hero */
.hero{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:120px 40px 80px;position:relative;overflow:hidden}
#heroCanvas{position:absolute;top:0;left:0;width:100%;height:100%;z-index:0}
.hero-content{position:relative;z-index:1;text-align:center;max-width:800px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 20px;border-radius:30px;background:rgba(79,70,229,.15);color:var(--indigo-400);font-size:13px;font-weight:500;margin-bottom:28px;border:1px solid rgba(79,70,229,.3);backdrop-filter:blur(8px)}
.hero-badge::before{content:'';width:8px;height:8px;border-radius:50%;background:var(--emerald-400);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(52,211,153,.4)}70%{box-shadow:0 0 0 10px rgba(52,211,153,0)}100%{box-shadow:0 0 0 0 rgba(52,211,153,0)}}
.hero-title{font-size:56px;font-weight:700;color:var(--text);margin-bottom:20px;line-height:1.1}
.hero-gradient{background:linear-gradient(135deg,var(--indigo-400),var(--emerald-400),var(--amber-400));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;background-size:200% auto;animation:gradientShift 3s ease infinite}
@keyframes gradientShift{0%{background-position:0% center}50%{background-position:100% center}100%{background-position:0% center}}
.hero-desc{font-size:18px;color:var(--text-dim);max-width:600px;margin:0 auto 40px;line-height:1.7}
.hero-stats{display:flex;justify-content:center;gap:48px;flex-wrap:wrap}
.stat-item{text-align:center;position:relative}
.stat-item::after{content:'';position:absolute;right:-24px;top:50%;transform:translateY(-50%);width:1px;height:40px;background:var(--border)}
.stat-item:last-child::after{display:none}
.stat-num{font-size:42px;font-weight:700;color:var(--indigo-600);font-variant-numeric:tabular-nums}
.stat-item p{font-size:12px;color:var(--text-muted);margin-top:4px;text-transform:uppercase;letter-spacing:1px}

/* Section */
.section{padding:100px 40px;position:relative}
.section-header{text-align:center;margin-bottom:60px}
.section-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;border-radius:20px;font-size:12px;font-weight:500;margin-bottom:16px;letter-spacing:.5px;background:rgba(79,70,229,.12);color:var(--indigo-400);border:1px solid rgba(79,70,229,.2)}
.section-title{font-size:36px;font-weight:600;color:var(--text);margin-bottom:12px}
.section-desc{font-size:16px;color:var(--text-dim);max-width:500px;margin:0 auto}

/* Scroll Reveal */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s ease,transform .8s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay-1{transition-delay:.1s}
.reveal-delay-2{transition-delay:.2s}
.reveal-delay-3{transition-delay:.3s}
.reveal-delay-4{transition-delay:.4s}

/* Articles */
.articles-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:24px;max-width:1000px;margin:0 auto}
.article-card-link{text-decoration:none;color:inherit;display:block}
.article-card{background:var(--bg-card);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:16px;padding:28px;transition:all .5s;display:block;height:100%;position:relative;overflow:hidden}
.article-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--indigo-600),var(--emerald-400));opacity:0;transition:opacity .3s}
.article-card-link:hover .article-card{transform:translateY(-6px);background:var(--bg-card-hover);border-color:var(--border-hover);box-shadow:0 8px 24px rgba(0,0,0,.06)}
.article-card-link:hover .article-card::before{opacity:1}
.article-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.article-card-meta{display:flex;align-items:center;gap:12px}
.article-card-date{font-size:12px;color:var(--text-muted)}
.article-card-title{font-size:18px;font-weight:600;color:var(--text);margin-bottom:10px;line-height:1.4}
.article-card-excerpt{font-size:14px;color:var(--text-dim);line-height:1.7}

/* Pinned badge */
.article-card.is-pinned{border-left:3px solid var(--amber-400)}
.pinned-badge{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:6px;font-size:11px;font-weight:600;background:rgba(251,191,36,.12);color:var(--amber-600);border:1px solid rgba(217,119,6,.2)}

/* Timeline */
.timeline{max-width:700px;margin:0 auto;position:relative}
.timeline::before{content:'';position:absolute;left:28px;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,var(--indigo-600),var(--emerald-400),var(--indigo-600));opacity:.3}
.timeline-item{display:flex;gap:24px;margin-bottom:40px;position:relative}
.timeline-year{font-size:12px;color:var(--indigo-600);font-weight:600;margin-top:6px;flex-shrink:0;width:180px;text-align:right;position:relative;word-break:break-word;line-height:1.5}
.timeline-year::after{content:'';position:absolute;right:-24px;top:6px;width:16px;height:16px;border-radius:50%;border:3px solid var(--indigo-600);background:var(--bg);z-index:1;transition:all .3s}
.timeline-item.active .timeline-year::after{background:var(--indigo-400);border-color:var(--indigo-600);animation:pulseNode 2s infinite}
@keyframes pulseNode{0%{box-shadow:0 0 0 0 rgba(79,70,229,.5)}70%{box-shadow:0 0 0 12px rgba(79,70,229,0)}100%{box-shadow:0 0 0 0 rgba(79,70,229,0)}}
.timeline-card{flex:1;background:var(--bg-card);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:16px;padding:28px;transition:all .5s;position:relative;overflow:hidden}
.timeline-card::before{content:'';position:absolute;top:0;left:0;width:4px;height:100%;background:linear-gradient(to bottom,var(--indigo-400),var(--emerald-400));opacity:0;transition:opacity .3s}
.timeline-item:hover .timeline-card{transform:translateY(-4px);background:var(--bg-card-hover);border-color:var(--border-hover);box-shadow:0 8px 24px rgba(0,0,0,.06)}
.timeline-item:hover .timeline-card::before{opacity:1}
.timeline-card-title{font-size:18px;font-weight:600;color:var(--text);margin-bottom:10px}
.timeline-card-desc{font-size:14px;color:var(--text-dim);line-height:1.7;margin-bottom:16px}

/* Tags */
.flex{display:flex}
.flex-col{flex-direction:column}
.gap-2{gap:8px}
.gap-3{gap:12px}
.items-center{align-items:center}
.flex-wrap{flex-wrap:wrap}
.tag{padding:5px 14px;border-radius:20px;font-size:12px;font-weight:500;transition:all .2s;background:rgba(0,0,0,.03);color:var(--text-dim);border:1px solid var(--border)}
.tag:hover{transform:scale(1.05);background:rgba(0,0,0,.06)}
.tag-goc{background:rgba(5,150,105,.08);color:var(--emerald-600);border:1px solid rgba(5,150,105,.15)}
.tag-cpp{background:rgba(79,70,229,.08);color:var(--indigo-600);border:1px solid rgba(79,70,229,.15)}

/* Skills — circular progress */
.skills-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:32px;max-width:960px;margin:0 auto}
.skill-card{background:var(--bg-card);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:20px;padding:36px 28px;transition:all .5s;position:relative;overflow:hidden;text-align:center}
.skill-card::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:conic-gradient(from 0deg,transparent,var(--indigo-600),transparent,var(--emerald-400),transparent);opacity:0;transition:opacity .5s;animation:cardRotate 6s linear infinite;pointer-events:none;border-radius:20px}
@keyframes cardRotate{to{transform:rotate(360deg)}}
.skill-card::after{content:'';position:absolute;inset:1px;border-radius:19px;background:rgba(250,251,255,.92);z-index:0}
.skill-card:hover{transform:translateY(-8px);box-shadow:0 12px 32px rgba(0,0,0,.08);border-color:var(--border-hover)}
.skill-card:hover::before{opacity:.15}
.skill-card>*{position:relative;z-index:1}
.skill-icon{width:56px;height:56px;border-radius:16px;display:inline-flex;align-items:center;justify-content:center;font-size:24px;font-weight:700;margin-bottom:20px;position:relative}
.skill-icon.green{background:rgba(5,150,105,.1);color:var(--emerald-600)}
.skill-icon.blue{background:rgba(79,70,229,.1);color:var(--indigo-600)}
.skill-icon.amber{background:rgba(217,119,6,.1);color:var(--amber-600)}
.skill-icon.rose{background:rgba(225,18,72,.1);color:var(--rose-600)}
.skill-card h3{font-size:18px;font-weight:600;color:var(--text);margin-bottom:8px}
.skill-card p{font-size:14px;color:var(--text-dim);margin-bottom:24px;line-height:1.6}

/* Circular progress ring */
.skill-ring{width:120px;height:120px;margin:0 auto 16px;position:relative}
.skill-ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.skill-ring circle{fill:none;stroke-width:6;stroke-linecap:round}
.skill-ring .ring-bg{stroke:rgba(0,0,0,.08)}
.skill-ring .ring-fill{transition:stroke-dashoffset 1.5s ease}
.skill-ring .ring-fill.blue{stroke:var(--indigo-600)}
.skill-ring .ring-fill.green{stroke:var(--emerald-600)}
.skill-ring .ring-fill.amber{stroke:var(--amber-600)}
.skill-ring .ring-fill.rose{stroke:var(--rose-600)}
.skill-ring .ring-fill.purple{stroke:#9333EA}
.ring-label{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:22px;font-weight:700;color:var(--text)}
.skill-level{text-align:center;font-size:12px;color:var(--text-muted);margin-top:4px}

/* Projects */
.projects-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px;max-width:1000px;margin:0 auto}
.project-card{background:var(--bg-card);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:20px;padding:32px;transition:all .5s;position:relative;overflow:hidden}
.project-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--indigo-600),var(--emerald-400),var(--amber-400));opacity:0;transition:opacity .3s}
.project-card::after{content:'';position:absolute;inset:0;background:radial-gradient(circle at var(--mx,50%) var(--my,50%),rgba(129,140,248,.06),transparent 60%);pointer-events:none;transition:opacity .3s}
.project-card:hover{transform:translateY(-8px);background:var(--bg-card-hover);border-color:var(--border-hover);box-shadow:0 12px 32px rgba(0,0,0,.06)}
.project-card:hover::before{opacity:1}
.project-header{display:flex;align-items:flex-start;gap:16px;margin-bottom:20px}
.project-icon{width:48px;height:48px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.project-icon.pi-indigo{background:rgba(79,70,229,.1);color:var(--indigo-600)}
.project-icon.pi-emerald{background:rgba(5,150,105,.1);color:var(--emerald-600)}
.project-icon.pi-amber{background:rgba(217,119,6,.1);color:var(--amber-600)}
.project-name{font-size:18px;font-weight:600;color:var(--text);margin-bottom:4px}
.project-type{font-size:12px;color:var(--indigo-400);font-weight:500}
.project-desc{font-size:14px;color:var(--text-dim);line-height:1.7;margin-bottom:20px}

/* Quote */
.quote{max-width:600px;margin:0 auto;background:rgba(79,70,229,.05);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(79,70,229,.12);border-radius:24px;padding:48px;text-align:center;position:relative;overflow:hidden}
.quote::before{content:'\201C';position:absolute;top:-20px;left:30px;font-size:120px;color:rgba(79,70,229,.08);font-family:Georgia,serif}
.quote p{font-size:20px;color:var(--text);font-style:italic;line-height:1.7;margin-bottom:20px;position:relative;z-index:1}
.quote cite{font-size:14px;color:var(--indigo-400);font-style:normal;font-weight:500}

/* Footer */
.footer{padding:60px 40px;border-top:1px solid var(--border);position:relative;z-index:1}
.footer-content{display:flex;align-items:center;justify-content:space-between;max-width:1100px;margin:0 auto}
.footer-logo{font-size:20px;font-weight:600;color:var(--text);margin-bottom:8px}
.footer-logo span{color:var(--indigo-400)}
.footer-desc{font-size:14px;color:var(--text-dim)}
.footer-contact{margin-top:8px;font-size:13px;color:var(--text-muted)}
.footer-contact a{color:var(--indigo-400);text-decoration:none}
.footer-contact a:hover{text-decoration:underline}
.footer-links{display:flex;gap:16px}
.footer-links a{font-size:14px;color:var(--indigo-400);text-decoration:none;padding:10px 20px;border-radius:10px;border:1px solid var(--border);transition:all .3s;backdrop-filter:blur(8px)}
.footer-links a:hover{background:rgba(79,70,229,.1);transform:translateY(-2px);border-color:var(--border-hover)}

/* Article Page */
.article-page{max-width:780px;margin:0 auto;padding:120px 40px 80px;position:relative;z-index:1}
.article-page-header{margin-bottom:40px}
.article-page-header h1{font-size:36px;font-weight:700;color:var(--text);margin-bottom:16px;line-height:1.3}
.article-page-meta{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.article-back{display:inline-flex;align-items:center;gap:6px;font-size:14px;color:var(--indigo-400);text-decoration:none;margin-bottom:32px;transition:all .2s}
.article-back:hover{gap:10px}
.article-content{font-size:16px;line-height:1.8;color:var(--text)}
.article-content h1,.article-content h2,.article-content h3{color:var(--text);margin:32px 0 16px;font-weight:600}
.article-content h2{font-size:24px;border-bottom:1px solid var(--border);padding-bottom:12px}
.article-content p{margin-bottom:16px}
.article-content a{color:var(--indigo-400)}
.article-content ul,.article-content ol{margin:0 0 16px 24px}
.article-content blockquote{border-left:4px solid var(--indigo-400);padding:12px 20px;margin:16px 0;background:rgba(79,70,229,.08);border-radius:0 8px 8px 0;font-style:italic}
.article-content img{max-width:100%;border-radius:12px;margin:16px 0}
.article-content table{width:100%;border-collapse:collapse;margin:16px 0}
.article-content th,.article-content td{border:1px solid var(--border);padding:10px 14px;text-align:left}
.article-content th{background:var(--bg-card);font-weight:600}
.article-content code:not(.hljs){background:rgba(129,140,248,.1);color:var(--indigo-400);padding:2px 8px;border-radius:6px;font-size:14px;font-family:'SF Mono','Fira Code',monospace}
.code-block-wrapper{position:relative;margin:16px 0;border-radius:12px;overflow:hidden;background:#1e293b}
.code-block-wrapper .code-lang{position:absolute;top:0;right:0;padding:4px 12px;font-size:11px;color:var(--indigo-400);background:rgba(0,0,0,.2);border-radius:0 12px 0 8px;font-family:'SF Mono','Fira Code',monospace}
.code-block-wrapper pre{margin:0;padding:20px;overflow-x:auto}
.code-block-wrapper code{font-family:'SF Mono','Fira Code',Consolas,monospace;font-size:14px;line-height:1.6;color:#e2e8f0}
.hljs{background:transparent!important}

/* Responsive */
@media(max-width:768px){
    .navbar{padding:14px 20px}
    .nav-links{display:none;gap:16px}
    .nav-links.mobile-open{display:flex;position:absolute;top:100%;left:0;right:0;background:rgba(250,251,255,.98);backdrop-filter:blur(24px);flex-direction:column;padding:16px;box-shadow:0 8px 24px rgba(0,0,0,.08);border-bottom:1px solid var(--border)}
    .nav-toggle{display:block}
    .hero{padding:100px 20px 60px}
    .hero-title{font-size:32px}
    .hero-desc{font-size:15px}
    .hero-stats{gap:20px}
    .stat-num{font-size:28px}
    .stat-item::after{right:-12px;height:30px}
    .section{padding:60px 20px}
    .section-title{font-size:26px}
    .timeline-year{width:80px;font-size:11px}
    .skills-grid,.projects-grid,.articles-grid{grid-template-columns:1fr}
    .quote{padding:28px 20px}
    .quote p{font-size:16px}
    .floating-code{display:none}
    .footer-content{flex-direction:column;gap:24px;text-align:center}
    .article-page{padding:100px 20px 60px}
    .article-page-header h1{font-size:28px}
}