*{box-sizing:border-box;margin:0;padding:0;}
:root{
  --brand:#0C447C;--brand2:#185FA5;--brand3:#378ADD;
  --brand-light:#E6F1FB;--brand-mid:#B5D4F4;--brand-dark:#042C53;
  --text:#1a1a1a;--muted:#6b7280;--border:rgba(0,0,0,0.08);
  --bg:#ffffff;--surface:#f9f9f7;
}
html{scroll-behavior:smooth;}
body{font-family:'DM Sans',sans-serif;color:var(--text);background:var(--bg);font-size:15px;line-height:1.6;}
main{display:block;}
img{max-width:100%;}
a{color:inherit;}

/* NAV */
nav{display:flex;align-items:center;justify-content:space-between;padding:0 2.5rem;height:64px;border-bottom:0.5px solid var(--border);background:var(--bg);position:sticky;top:0;z-index:100;}
.nav-logo{display:flex;align-items:center;gap:10px;cursor:pointer;text-decoration:none;}
.nav-logo svg{width:40px;height:40px;}
.logo-text{display:flex;flex-direction:column;line-height:1.1;}
.logo-name{font-family:'DM Serif Display',serif;font-size:14px;color:var(--brand);letter-spacing:0.01em;}
.logo-sub{font-size:10px;color:var(--muted);letter-spacing:0.08em;text-transform:uppercase;}
.nav-links{display:flex;gap:2rem;align-items:center;}
.nav-links a{font-size:13px;color:var(--muted);text-decoration:none;cursor:pointer;padding-bottom:2px;border-bottom:1.5px solid transparent;transition:color 0.15s,border-color 0.15s;}
.nav-links a:hover,.nav-links a.active{color:var(--brand);border-bottom-color:var(--brand3);}
.nav-cta{font-size:13px;padding:7px 18px;border:0.5px solid var(--brand);color:var(--brand);background:transparent;border-radius:100px;cursor:pointer;font-family:'DM Sans',sans-serif;transition:all 0.15s;text-decoration:none;display:inline-block;}
.nav-cta:hover{background:var(--brand);color:#fff;}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;width:40px;height:40px;align-items:center;justify-content:center;}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:"";display:block;width:20px;height:1.5px;background:var(--text);position:relative;transition:transform 0.2s,opacity 0.2s;}
.nav-toggle span::before{position:absolute;top:-6px;}
.nav-toggle span::after{position:absolute;top:6px;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:rotate(45deg);top:0;}
.nav-toggle[aria-expanded="true"] span::after{transform:rotate(-45deg);top:0;}

/* PAGE FADE */
main{animation:fadein 0.22s ease;}
@keyframes fadein{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* HOME */
.hero{padding:5rem 2.5rem 4rem;display:grid;grid-template-columns:1fr 220px;gap:2rem;align-items:center;border-bottom:0.5px solid var(--border);}
.hero-eyebrow{font-size:11px;font-weight:500;letter-spacing:0.14em;text-transform:uppercase;color:var(--brand3);margin-bottom:1rem;}
.hero h1{font-family:'DM Serif Display',serif;font-size:clamp(2rem,4.5vw,3rem);line-height:1.15;margin-bottom:1.1rem;}
.hero h1 em{font-style:italic;color:var(--brand2);}
.hero-desc{font-size:15px;color:var(--muted);max-width:460px;line-height:1.8;margin-bottom:1.8rem;}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:1.8rem;}
.hero-tag{font-size:11px;padding:4px 12px;border-radius:100px;border:0.5px solid var(--border);color:var(--muted);}
.hero-tag.blue{background:var(--brand-light);color:var(--brand);border-color:var(--brand-mid);}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;}
.btn-p{padding:10px 24px;background:var(--brand);color:#fff;border:none;border-radius:100px;font-size:13px;font-family:'DM Sans',sans-serif;cursor:pointer;transition:background 0.15s;text-decoration:none;display:inline-block;}
.btn-p:hover{background:var(--brand2);}
.btn-g{padding:10px 24px;background:transparent;color:var(--brand);border:0.5px solid var(--brand);border-radius:100px;font-size:13px;font-family:'DM Sans',sans-serif;cursor:pointer;transition:all 0.15s;text-decoration:none;display:inline-block;}
.btn-g:hover{background:var(--brand-light);}
.hero-mark{display:flex;align-items:center;justify-content:center;}
.hero-mark svg{width:180px;height:180px;}
.home-grid{display:grid;grid-template-columns:repeat(3,1fr);}
.home-card{padding:2.2rem 2.5rem;border-right:0.5px solid var(--border);cursor:pointer;transition:background 0.15s;text-decoration:none;color:inherit;display:block;}
.home-card:last-child{border-right:none;}
.home-card:hover{background:var(--brand-light);}
.hc-icon{font-size:22px;color:var(--brand3);margin-bottom:0.9rem;}
.home-card h3{font-size:14px;font-weight:500;margin-bottom:0.3rem;}
.home-card p{font-size:13px;color:var(--muted);line-height:1.6;}

/* PAGE HEADER */
.page-header{padding:2.8rem 2.5rem 2rem;border-bottom:0.5px solid var(--border);}
.page-header h1{font-family:'DM Serif Display',serif;font-size:1.9rem;margin-bottom:0.3rem;}
.page-header p{color:var(--muted);font-size:13px;}

/* BLOG */
.blog-filters{display:flex;gap:8px;padding:1.2rem 2.5rem;border-bottom:0.5px solid var(--border);flex-wrap:wrap;}
.filter-btn{font-size:12px;padding:5px 14px;border-radius:100px;border:0.5px solid var(--border);background:transparent;cursor:pointer;font-family:'DM Sans',sans-serif;color:var(--muted);transition:all 0.15s;}
.filter-btn:hover,.filter-btn.on{background:var(--brand);color:#fff;border-color:var(--brand);}
.blog-list{padding:0 2.5rem;}
.blog-post{padding:2rem 0;border-bottom:0.5px solid var(--border);display:grid;grid-template-columns:56px 1fr;gap:1.5rem;align-items:start;text-decoration:none;color:inherit;}
.blog-post:last-child{border-bottom:none;}
.blog-post:hover .bp-title{color:var(--brand2);}
.bp-num{font-family:'DM Serif Display',serif;font-size:2.2rem;color:var(--brand-mid);line-height:1;}
.bp-cat{font-size:11px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--brand3);margin-bottom:0.4rem;}
.bp-title{font-family:'DM Serif Display',serif;font-size:1.25rem;line-height:1.25;margin-bottom:0.5rem;transition:color 0.15s;}
.bp-excerpt{font-size:13px;color:var(--muted);line-height:1.7;margin-bottom:0.8rem;}
.bp-tags{display:flex;gap:6px;flex-wrap:wrap;}
.bp-tag{font-size:11px;padding:3px 10px;border-radius:100px;}
.bp-tag.bio{background:#E1F5EE;color:#085041;}
.bp-tag.sys{background:#EEEDFE;color:#3C3489;}
.bp-tag.pol{background:#FAEEDA;color:#633806;}

/* SKETCH GALLERY */
.sketch-gallery-wrap{padding:2rem 2.5rem 2.5rem;border-top:0.5px solid var(--border);}
.sketch-gallery-title{font-size:11px;font-weight:600;letter-spacing:0.1em;text-transform:uppercase;color:var(--muted);margin-bottom:1rem;}
.sketch-gallery{display:flex;gap:1.2rem;overflow-x:auto;padding-bottom:1rem;scrollbar-width:thin;scrollbar-color:var(--border) transparent;-webkit-overflow-scrolling:touch;}
.sketch-gallery::-webkit-scrollbar{height:4px;}
.sketch-gallery::-webkit-scrollbar-track{background:transparent;}
.sketch-gallery::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px;}
.gallery-item{flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:0.5rem;}
.gallery-item img{width:160px;height:200px;object-fit:cover;border-radius:8px;border:0.5px solid var(--border);filter:contrast(1.05);background:#fff;transition:transform 0.2s,box-shadow 0.2s;}
.gallery-item img:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,0.25);}
/* ACKNOWLEDGEMENTS */
.acknowledgements{padding:2rem 2.5rem 3rem;border-top:0.5px solid var(--border);}
.acknowledgements p{font-size:14px;color:var(--muted);line-height:1.8;}
.acknowledgements strong{color:var(--text);}
/* DISCLAIMER BANNER */
.disclaimer-banner{background:#1a1a2e;border-bottom:2px solid var(--brand3);padding:1rem 2.5rem;text-align:center;}
.disclaimer-banner strong{display:block;font-size:15px;font-weight:700;color:#fff;letter-spacing:0.03em;margin-bottom:0.4rem;}
.disclaimer-banner p{font-size:12px;color:rgba(255,255,255,0.6);margin:0;line-height:1.6;max-width:800px;margin:0 auto;}
/* READER */
.reader-wrap{padding:3.5rem 3rem;max-width:820px;margin:0 auto;}
.reader-back{font-size:13px;color:var(--brand2);cursor:pointer;display:inline-flex;align-items:center;gap:6px;margin-bottom:2rem;text-decoration:none;}
.reader-back:hover{text-decoration:underline;}
.reader-cat{font-size:11px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--brand3);margin-bottom:0.6rem;}
.reader-title{font-family:'DM Serif Display',serif;font-size:1.9rem;line-height:1.2;margin-bottom:0.5rem;}
.reader-meta{color:var(--muted);font-size:13px;margin-bottom:2rem;padding-bottom:2rem;border-bottom:0.5px solid var(--border);}
.reader-body{font-size:16px;line-height:1.9;}
.reader-body h2{font-family:'DM Serif Display',serif;font-size:1.4rem;margin:2.5rem 0 0.8rem;}
.reader-body h3{font-family:'DM Serif Display',serif;font-size:1.15rem;margin:2rem 0 0.6rem;color:var(--brand);}
.reader-body p{margin-bottom:1.2rem;color:var(--muted);}
.reader-body blockquote{border-left:2px solid var(--brand3);padding-left:1.2rem;color:var(--muted);font-style:italic;margin:1.5rem 0;border-radius:0;}
.reader-body img{border-radius:8px;}
.pipeline-table{width:100%;border-collapse:collapse;margin:1.8rem 0 2rem;font-size:14px;}
.pipeline-table th{background:var(--brand);color:#fff;text-align:left;padding:10px 14px;font-weight:500;font-size:13px;}
.pipeline-table td{padding:11px 14px;border-bottom:0.5px solid var(--border);color:var(--muted);vertical-align:top;line-height:1.6;}
.pipeline-table tr:nth-child(even) td{background:var(--surface);}
.pipeline-table tr:last-child td{border-bottom:none;}
.pipeline-table td:first-child{font-weight:500;color:var(--text);white-space:nowrap;}
.pipeline-table td:nth-child(2){white-space:nowrap;}
.check-list{list-style:none;margin:1rem 0 1.5rem;padding:0;display:flex;flex-direction:column;gap:0.9rem;}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--muted);line-height:1.7;}
.check-list li::before{content:"✓";color:var(--brand3);font-weight:700;font-size:14px;margin-top:3px;flex-shrink:0;}
.check-list li strong{color:var(--text);}
.base-grid{display:flex;flex-wrap:wrap;gap:8px;margin:1rem 0 1.5rem;}
.base-pill{font-size:12px;padding:5px 14px;border-radius:100px;background:var(--brand-light);color:var(--brand);border:0.5px solid var(--brand-mid);font-weight:500;}
.struct-list{list-style:none;margin:1rem 0 1.5rem;padding:0;display:flex;flex-direction:column;gap:0.9rem;}
.struct-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--muted);line-height:1.7;}
.struct-list li::before{content:"▲";color:#c0392b;font-size:11px;margin-top:5px;flex-shrink:0;}
.struct-list li strong{color:var(--text);}
.citation{font-size:11px;color:var(--brand2);vertical-align:super;margin-left:1px;}
.citations-block{margin-top:1.5rem;padding:1.2rem 1.5rem;background:var(--surface);border:0.5px solid var(--border);border-radius:6px;font-size:12px;color:var(--muted);line-height:1.8;}
.citations-block p{font-size:12px;margin-bottom:0.3rem;}
.solution-box{margin:1.8rem 0;padding:1.6rem 2rem;background:var(--brand-light);border-left:3px solid var(--brand3);border-radius:0 6px 6px 0;}
.solution-box p{color:var(--text);font-size:15px;margin-bottom:1rem;}
.solution-box p:last-child{margin-bottom:0;}
/* table of contents */
.post-toc{display:none;}
.post-toc.has-items{display:block;margin-bottom:2.2rem;padding:1.2rem 1.5rem;background:var(--surface);border:0.5px solid var(--border);border-radius:8px;}
.post-toc-title{font-size:11px;font-weight:600;letter-spacing:0.08em;text-transform:uppercase;color:var(--brand3);margin-bottom:0.7rem;cursor:pointer;display:flex;align-items:center;justify-content:space-between;}
.post-toc-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:0.45rem 1.5rem;}
.post-toc-list.collapsed{display:none;}
.post-toc-list li a{font-size:13.5px;color:var(--muted);text-decoration:none;cursor:pointer;line-height:1.5;display:inline-block;}
.post-toc-list li a:hover{color:var(--brand2);text-decoration:underline;}
.post-toc-list li.toc-sub a{padding-left:0.9rem;font-size:12.5px;opacity:0.85;}
.post-toc-caret{font-size:10px;transition:transform 0.15s;}
.post-toc-caret.open{transform:rotate(180deg);}
@media (max-width:640px){.post-toc-list{grid-template-columns:1fr;}}

/* ABOUT */
.personal-wrap{display:grid;grid-template-columns:250px 1fr;min-height:440px;}
.personal-sidebar{padding:2.5rem 2rem;border-right:0.5px solid var(--border);}
.avatar{width:72px;height:72px;border-radius:50%;background:var(--brand);color:var(--brand-light);display:flex;align-items:center;justify-content:center;font-family:'DM Serif Display',serif;font-size:1.6rem;margin-bottom:1rem;}
.ps-name{font-size:15px;font-weight:500;margin-bottom:2px;}
.ps-role{font-size:12px;color:var(--muted);margin-bottom:1.5rem;}
.ps-links{display:flex;flex-direction:column;gap:0.6rem;}
.ps-links a{font-size:13px;color:var(--muted);text-decoration:none;display:flex;align-items:center;gap:8px;}
.ps-links a:hover{color:var(--brand);}
.personal-main{padding:2.5rem;}
.personal-main h2{font-family:'DM Serif Display',serif;font-size:1.55rem;margin-bottom:1rem;}
.personal-main p{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:1rem;}
.skill-tags{display:flex;flex-wrap:wrap;gap:7px;margin:1.2rem 0;}
.sk{font-size:11px;padding:4px 12px;background:var(--surface);border:0.5px solid var(--border);border-radius:100px;}

/* PROJECTS */
.proj-list{padding:0 2.5rem 3rem;display:grid;gap:1.5rem;}
.proj-card{border:0.5px solid var(--border);border-radius:12px;padding:1.8rem 2rem;}
.proj-top{display:flex;align-items:center;gap:1rem;margin-bottom:0.9rem;}
.proj-status{font-size:11px;font-weight:500;letter-spacing:0.08em;text-transform:uppercase;margin-bottom:0.25rem;}
.proj-status.live{color:#1a8a4a;}
.proj-status.dev{color:var(--brand2);}
.proj-card h2{font-family:'DM Serif Display',serif;font-size:1.3rem;}
.proj-desc{font-size:14px;color:var(--muted);line-height:1.8;margin-bottom:0.9rem;}
.proj-meta{display:flex;flex-wrap:wrap;gap:0.5rem;font-size:12px;color:var(--muted);margin-bottom:0.9rem;}
.proj-tags{display:flex;flex-wrap:wrap;gap:7px;}
.proj-link{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--brand2);text-decoration:none;border:0.5px solid var(--brand-mid);border-radius:100px;padding:6px 14px;margin-bottom:1rem;transition:all 0.15s;}
.proj-link:hover{background:var(--brand-light);border-color:var(--brand);}
.proj-thesis{background:var(--brand-light);border-radius:8px;padding:1rem 1.2rem;margin:1rem 0;font-size:13px;color:var(--brand-dark);line-height:1.7;}
.proj-features{display:grid;grid-template-columns:repeat(2,1fr);gap:1.1rem;margin:1.2rem 0;}
.proj-feature h3{font-size:12.5px;font-weight:500;margin-bottom:0.3rem;color:var(--text);}
.proj-feature p{font-size:12.5px;color:var(--muted);line-height:1.7;}
@media(max-width:700px){.proj-features{grid-template-columns:1fr;}}
.proj-more{padding-top:0.5rem;}
.proj-more-title{font-family:'DM Serif Display',serif;font-size:1.1rem;margin-bottom:0.3rem;}
.proj-more-sub{font-size:13px;color:var(--muted);margin-bottom:1.3rem;}
.proj-mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.3rem 1.6rem;}
.proj-mini h3{font-size:13px;font-weight:500;margin-bottom:0.35rem;color:var(--brand2);}
.proj-mini p{font-size:13px;color:var(--muted);line-height:1.75;}
@media(max-width:700px){.proj-mini-grid{grid-template-columns:1fr;}}
.tl{margin-top:1.5rem;}
.tl-item{display:flex;gap:1rem;margin-bottom:1.3rem;}
.tl-dot{width:8px;height:8px;border-radius:50%;background:var(--brand3);margin-top:6px;flex-shrink:0;}
.tl-yr{font-size:11px;font-weight:500;color:var(--brand2);min-width:36px;padding-top:2px;}
.tl-t h3{font-size:13px;font-weight:500;margin-bottom:2px;}
.tl-t p{font-size:12px;color:var(--muted);}

/* RESUME DROPDOWN */
.resume{margin-top:2rem;border:0.5px solid var(--border);border-radius:10px;background:var(--surface);}
.resume>summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:0.75rem;padding:0.95rem 1.2rem;user-select:none;}
.resume>summary::-webkit-details-marker{display:none;}
.rs-label{font-size:11px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--brand2);}
.rs-hint{font-size:12px;color:var(--muted);}
.rs-chev{margin-left:auto;font-size:11px;color:var(--muted);transition:transform 0.15s;}
.resume[open]>summary .rs-chev{transform:rotate(180deg);}
.resume>summary:hover .rs-label{color:var(--brand3);}
.rs-body{padding:0 1.2rem 1.2rem;border-top:0.5px solid var(--border);}
.rs-intro{font-size:13px;color:var(--muted);line-height:1.8;padding:1.1rem 0 0.2rem;}
.rs-sec{margin-top:1.3rem;}
.rs-sec h3{font-size:11px;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--brand3);margin-bottom:0.7rem;}
.rs-entry{margin-bottom:0.9rem;}
.rs-entry:last-child{margin-bottom:0;}
.rs-row{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;flex-wrap:wrap;}
.rs-role{font-size:13px;font-weight:500;}
.rs-date{font-size:11px;color:var(--brand2);white-space:nowrap;}
.rs-org{font-size:12px;color:var(--muted);margin-bottom:0.3rem;}
.rs-body ul{margin:0.2rem 0 0 1.1rem;}
.rs-body li{font-size:12.5px;color:var(--muted);line-height:1.7;}
.rs-inline{font-size:12.5px;color:var(--muted);line-height:1.8;}
.rs-download{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--brand2);text-decoration:none;margin-top:1.2rem;}
.rs-download:hover{text-decoration:underline;}

/* FOOTER */
footer{border-top:0.5px solid var(--border);padding:2rem 2.5rem;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;margin-top:4rem;}
footer p{font-size:12px;color:var(--muted);}
.footer-links{display:flex;gap:1.5rem;}
.footer-links a{font-size:12px;color:var(--muted);text-decoration:none;}
.footer-links a:hover{color:var(--brand);}

@media(max-width:700px){
  nav{padding:0 1.2rem;}
  .nav-toggle{display:flex;}
  .nav-links{position:fixed;top:64px;left:0;right:0;bottom:0;background:var(--bg);flex-direction:column;align-items:flex-start;gap:0;padding:1rem 1.5rem;display:none;overflow-y:auto;}
  .nav-links.open{display:flex;}
  .nav-links a{width:100%;padding:14px 0;border-bottom:0.5px solid var(--border);font-size:15px;}
  .nav-links .nav-cta{margin-top:12px;text-align:center;}
  .hero{grid-template-columns:1fr;padding:3rem 1.5rem 2.5rem;}
  .hero-mark{display:none;}
  .home-grid{grid-template-columns:1fr;}
  .home-card{border-right:none;border-bottom:0.5px solid var(--border);}
  .personal-wrap{grid-template-columns:1fr;}
  .personal-sidebar{border-right:none;border-bottom:0.5px solid var(--border);}
  .blog-post{grid-template-columns:40px 1fr;}
  .page-header,.blog-list,.blog-filters,.personal-main,.personal-sidebar,.proj-list{padding-left:1.5rem;padding-right:1.5rem;}
  .reader-wrap{padding:2rem 1.5rem;}
}