:root{
  --bg:#f4f2ed;
  --paper:#ffffff;
  --ink:#1d232b;
  --muted:#697381;
  --line:#d8d4cb;
  --accent:#1f5d8f;
  --accent-2:#b46b36;
  --soft:#e9eef3;
  --soft-2:#f8f7f4;
  --good:#256b4b;
  --shadow:0 18px 45px rgba(31,43,55,.08);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--ink);
  background:linear-gradient(180deg,#f4f2ed 0%,#fbfaf7 42%,#f4f2ed 100%);
  line-height:1.6;
}
a{color:inherit;text-decoration:none}
a:hover{color:var(--accent)}
.container{max-width:1120px;margin:0 auto;padding:0 22px}
.topbar{
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.78);
  backdrop-filter:blur(12px);
  position:sticky;top:0;z-index:20;
}
.nav{display:flex;justify-content:space-between;align-items:center;min-height:72px;gap:18px}
.brand{display:flex;flex-direction:column;line-height:1.2;font-weight:700;letter-spacing:.01em}
.brand span{font-size:13px;color:var(--muted);font-weight:600;margin-top:4px}
.navlinks{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.navlinks a,.btn{
  border:1px solid var(--line);
  background:var(--paper);
  padding:10px 14px;
  border-radius:999px;
  color:var(--ink);
  font-weight:650;
  font-size:14px;
}
.navlinks a:hover,.btn:hover{border-color:var(--accent);color:var(--accent);background:#f7fbff}
.hero{padding:82px 0 54px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);gap:32px;align-items:stretch}
.kicker{display:inline-flex;gap:8px;align-items:center;color:var(--accent);font-weight:800;text-transform:uppercase;letter-spacing:.16em;font-size:12px;margin-bottom:18px}
.kicker:before{content:"";display:inline-block;width:34px;height:2px;background:var(--accent)}
h1{font-size:clamp(38px,6vw,72px);line-height:1.02;margin:0 0 18px;letter-spacing:-.05em}
.subtitle{font-size:clamp(19px,2.5vw,28px);font-weight:760;margin:0 0 10px;color:#28313c;letter-spacing:-.02em}
.portfolio-label{font-size:18px;color:var(--muted);margin:0}
.hero-card{
  border:1px solid var(--line);background:var(--paper);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;position:relative;overflow:hidden
}
.hero-card:before{content:"";position:absolute;inset:0 0 auto 0;height:8px;background:linear-gradient(90deg,var(--accent),var(--accent-2));}
.hero-card h2{margin:12px 0 14px;font-size:22px;letter-spacing:-.02em}
.hero-card p{color:var(--muted);margin:0 0 16px}
.fact-list{display:grid;gap:10px;margin:18px 0 0;padding:0;list-style:none}
.fact-list li{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding-top:10px;color:var(--muted);font-size:14px}
.fact-list b{color:var(--ink)}
.section{padding:36px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:20px}
h2{font-size:clamp(28px,4vw,42px);line-height:1.12;margin:0;letter-spacing:-.04em}
.section-desc{max-width:650px;color:var(--muted);margin:8px 0 0}
.projects{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.project-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;display:flex;flex-direction:column;min-height:380px;position:relative;overflow:hidden
}
.project-card:after{content:"";position:absolute;right:-70px;top:-70px;width:150px;height:150px;border:24px solid var(--soft);border-radius:50%;}
.project-number{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:var(--accent);font-weight:800;margin-bottom:24px}
.project-card h3{font-size:28px;line-height:1.12;letter-spacing:-.035em;margin:0 0 14px;max-width:520px}
.project-card p{color:var(--muted);margin:0 0 20px;position:relative;z-index:1}
.tags{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 22px;padding:0;list-style:none;position:relative;z-index:1}
.tags li,.tag{border:1px solid #d5e0ea;background:#f8fbfd;color:#24455f;border-radius:999px;padding:7px 10px;font-size:12px;font-weight:750;white-space:nowrap}
.project-card .btn{margin-top:auto;align-self:flex-start;position:relative;z-index:1}
.footer{border-top:1px solid var(--line);margin-top:60px;padding:28px 0 38px;color:var(--muted);font-size:14px}
.footer-grid{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}
.page-hero{padding:54px 0 30px}
.breadcrumbs{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:14px;margin-bottom:28px}
.breadcrumbs a{color:var(--accent);font-weight:700}
.case-title{font-size:clamp(36px,5vw,58px);line-height:1.04;margin:0 0 18px;letter-spacing:-.05em;max-width:1000px}
.case-lead{font-size:19px;color:#3a4654;max-width:900px;margin:0}
.meta-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:28px 0 0}
.meta{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:0 12px 25px rgba(31,43,55,.04)}
.meta span{display:block;color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.08em;font-weight:800;margin-bottom:6px}
.meta b{font-size:15px}
.content{display:grid;grid-template-columns:260px minmax(0,1fr);gap:34px;align-items:start;padding:30px 0 10px}
.toc{position:sticky;top:94px;background:var(--paper);border:1px solid var(--line);border-radius:20px;padding:18px;box-shadow:0 14px 32px rgba(31,43,55,.05)}
.toc strong{display:block;margin-bottom:10px}
.toc a{display:block;padding:9px 0;color:var(--muted);border-top:1px solid var(--line);font-size:14px;font-weight:650}
.toc a:hover{color:var(--accent)}
.case-section{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;margin-bottom:18px}
.case-section h2{font-size:30px;margin-bottom:12px}
.case-section h3{font-size:20px;margin:22px 0 8px;letter-spacing:-.015em}
.case-section p{color:#3c4653;margin:0 0 12px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:14px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:14px}
.info-card{border:1px solid var(--line);background:var(--soft-2);border-radius:18px;padding:18px}
.info-card h3{margin:0 0 8px;font-size:18px}
.info-card p,.info-card li{color:var(--muted);font-size:14px}
ul.clean{padding-left:20px;margin:12px 0 0;color:#3c4653}
ul.clean li{margin:8px 0}
.stack-table{width:100%;border-collapse:collapse;margin-top:14px;overflow:hidden;border-radius:16px;border:1px solid var(--line)}
.stack-table th,.stack-table td{padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
.stack-table th{background:#eef3f7;width:220px;color:#253443;font-size:14px}
.stack-table td{background:#fff;color:#485461;font-size:14px}
.stack-table tr:last-child th,.stack-table tr:last-child td{border-bottom:none}
.highlight{border-left:4px solid var(--accent);background:#f6fafd;padding:16px 18px;border-radius:14px;margin:16px 0;color:#314255}
.success{border-left-color:var(--good);background:#f5fbf7}
.diagram{background:#fbfaf7;border:1px solid var(--line);border-radius:20px;padding:16px;margin-top:16px;overflow:auto}
.diagram img{display:block;width:100%;height:auto;min-width:720px}
.skill-list{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.skill-list span{background:#f6f7f8;border:1px solid var(--line);border-radius:12px;padding:9px 11px;font-size:13px;font-weight:700;color:#394655}
.result-list{display:grid;gap:10px;margin:14px 0 0;padding:0;list-style:none}
.result-list li{display:flex;gap:12px;align-items:flex-start;background:#f8faf9;border:1px solid var(--line);border-radius:16px;padding:14px;color:#3c4653}
.result-list li:before{content:"✓";color:var(--good);font-weight:900}
.callout-line{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:14px;margin-top:18px}
.callout-line:before{content:"";width:44px;height:2px;background:var(--accent);display:inline-block}
@media (max-width:900px){
  .hero-grid,.projects,.content,.grid-2,.grid-3{grid-template-columns:1fr}
  .toc{position:relative;top:auto}
  .meta-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .nav{align-items:flex-start;flex-direction:column;padding:16px 0}
  .hero{padding-top:46px}
}
@media (max-width:560px){
  .meta-grid{grid-template-columns:1fr}
  .stack-table th,.stack-table td{display:block;width:100%}
  .project-card{min-height:auto}
  .navlinks{width:100%}
  .navlinks a{flex:1;text-align:center}
}