:root{
  --bg:#0A0B0D; --surface:#141619; --surface-2:#1B1E23;
  --border:#262A30; --border-soft:#1F2226;
  --text:#F2F1EC; --text-dim:#8B8F97; --text-faint:#565A62;
  --accent:#C9A24B; --accent-dim:rgba(201,162,75,0.12);
  --positive:#4FA57A; --positive-dim:rgba(79,165,122,0.12);
  --negative:#C1604A; --negative-dim:rgba(193,96,74,0.12);
  --radius:4px;
}
:root[data-theme="light"]{
  --bg:#FAFAF8; --surface:#FFFFFF; --surface-2:#F3F2EE;
  --border:#E4E2DB; --border-soft:#ECEAE3;
  --text:#16171A; --text-dim:#5B5E64; --text-faint:#8B8E93;
  --accent:#9C7830; --accent-dim:rgba(156,120,48,0.10);
  --positive:#2E7D53; --positive-dim:rgba(46,125,83,0.10);
  --negative:#A5432E; --negative-dim:rgba(165,67,46,0.10);
}
*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg); color:var(--text);
  font-family:'IBM Plex Sans',sans-serif;
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
  transition:background 0.2s, color 0.2s;
}
a{ color:inherit; text-decoration:none; }
.mono{ font-family:'IBM Plex Mono',monospace; }
.display{ font-family:'Space Grotesk',sans-serif; }
img{ max-width:100%; display:block; }

/* ---------- Nav ---------- */
.site-nav{
  position:sticky; top:0; z-index:50;
  display:flex; align-items:center; justify-content:space-between;
  padding:22px 40px;
  border-bottom:1px solid var(--border);
  background:color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter:blur(8px);
}
.nav-brand{ display:flex; align-items:center; gap:10px; white-space:nowrap; flex-shrink:0; }
.nav-brand .mark{ width:7px; height:7px; border-radius:50%; background:var(--accent); flex-shrink:0; }
.nav-brand .name{ font-family:'Space Grotesk',sans-serif; font-weight:600; font-size:15px; letter-spacing:-0.01em; }
.nav-links{ display:flex; align-items:center; gap:30px; }
.nav-links a{ font-size:13px; color:var(--text-dim); transition:color 0.15s; white-space:nowrap; }
.nav-links a:hover, .nav-links a.active{ color:var(--text); }
.nav-links span.label{ color:var(--text-faint); font-family:'IBM Plex Mono',monospace; font-size:11px; margin-right:4px; }
.theme-toggle{
  display:flex; align-items:center; justify-content:center;
  width:34px; height:34px; flex-shrink:0;
  border:1px solid var(--border); border-radius:50%; background:none; cursor:pointer;
  color:var(--text-dim); transition:border-color 0.15s, color 0.15s;
  padding:0;
}
.theme-toggle:hover{ border-color:var(--accent); color:var(--accent); }
.theme-toggle svg{ width:16px; height:16px; display:block; }
.nav-toggle{
  display:none; background:none; border:1px solid var(--border); border-radius:4px;
  color:var(--text); width:36px; height:36px; align-items:center; justify-content:center;
  cursor:pointer; font-size:15px; flex-shrink:0;
}

@media (max-width:720px){
  .site-nav{ padding:16px 20px; }
  .nav-brand .name{ font-size:14px; }
  .nav-toggle{ display:flex; }
  .nav-links{
    display:none;
    position:absolute; top:100%; left:0; right:0;
    flex-direction:column; align-items:stretch; gap:0;
    background:var(--bg); border-bottom:1px solid var(--border);
    padding:4px 20px 18px;
  }
  .nav-links.open{ display:flex; }
  .nav-links a{ padding:13px 0; border-bottom:1px solid var(--border-soft); font-size:14.5px; }
  .theme-toggle{ margin-top:14px; align-self:flex-start; }
}

/* ---------- Layout helpers ---------- */
.wrap{ max-width:1120px; margin:0 auto; padding:0 40px; }
@media (max-width:720px){ .wrap{ padding:0 20px; } }

section{ padding:72px 0; }
.section-eyebrow{
  font-size:11px; letter-spacing:0.1em; text-transform:uppercase;
  color:var(--text-faint); font-weight:500; margin-bottom:14px;
  font-family:'IBM Plex Mono',monospace;
}
.section-title{
  font-family:'Space Grotesk',sans-serif; font-size:30px; font-weight:600;
  margin-bottom:16px; letter-spacing:-0.01em;
}
.section-sub{ font-size:15px; color:var(--text-dim); max-width:600px; line-height:1.7; }

/* ---------- Hero ---------- */
.hero{ padding:110px 0 76px; border-bottom:1px solid var(--border); }
.hero-eyebrow{
  font-size:12px; font-family:'IBM Plex Mono',monospace; color:var(--text-faint);
  margin-bottom:28px; letter-spacing:0.02em;
}
.hero h1{
  font-family:'Space Grotesk',sans-serif; font-size:54px; font-weight:600;
  line-height:1.08; letter-spacing:-0.02em; max-width:800px; margin-bottom:24px;
}
.hero h1 .accent{ color:var(--accent); }
.hero-sub{ font-size:17px; color:var(--text-dim); max-width:600px; line-height:1.7; margin-bottom:36px; }
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; }
.btn{
  display:inline-flex; align-items:center; gap:8px; font-size:13px; font-weight:500;
  padding:13px 24px; border-radius:var(--radius); transition:all 0.15s;
}
.btn-primary{ background:var(--accent); color:var(--bg); }
.btn-primary:hover{ opacity:0.85; }
.btn-secondary{ border:1px solid var(--border); color:var(--text); }
.btn-secondary:hover{ border-color:var(--accent); color:var(--accent); }

@media (max-width:720px){
  .hero{ padding:60px 0 48px; }
  .hero h1{ font-size:32px; }
}

/* ---------- Practice area cards ---------- */
.area-grid{ display:grid; grid-template-columns:1fr 1fr; gap:1px; margin-top:44px; background:var(--border); border:1px solid var(--border); }
.area-grid-3{ grid-template-columns:1fr 1fr 1fr; }
@media (max-width:900px){ .area-grid-3{ grid-template-columns:1fr; } }
.area-card{
  background:var(--bg); padding:36px; transition:background 0.15s;
}
.area-card:hover{ background:var(--surface); }
.area-card .tag{
  display:block; font-size:11px; font-family:'IBM Plex Mono',monospace; letter-spacing:0.02em;
  color:var(--accent); margin-bottom:18px;
}
.area-card h3{ font-family:'Space Grotesk',sans-serif; font-size:22px; font-weight:600; margin-bottom:12px; }
.area-card p{ font-size:13.5px; color:var(--text-dim); line-height:1.7; margin-bottom:22px; }
.area-card .link{ font-size:13px; color:var(--text); font-weight:500; border-bottom:1px solid var(--accent); padding-bottom:2px; }
@media (max-width:720px){ .area-grid{ grid-template-columns:1fr; } }

/* ---------- Project / case study cards ---------- */
.project-grid{ display:grid; grid-template-columns:1fr 1fr; gap:1px; margin-top:40px; background:var(--border); border:1px solid var(--border); }
.project-card{
  background:var(--bg); overflow:hidden; display:flex; flex-direction:column; transition:background 0.15s;
}
.project-card:hover{ background:var(--surface); }
.project-thumb{
  width:100%; aspect-ratio:16/10; object-fit:cover; object-position:top;
  border-bottom:1px solid var(--border);
  background:var(--surface-2);
  filter:saturate(0.92);
}
.project-body{ padding:24px; flex:1; display:flex; flex-direction:column; }
.project-tags{ display:flex; gap:6px; margin-bottom:14px; flex-wrap:wrap; }
.project-tag{
  font-size:9.5px; font-family:'IBM Plex Mono',monospace; color:var(--text-faint);
  letter-spacing:0.02em;
}
.project-tag::after{ content:'·'; margin-left:6px; color:var(--border); }
.project-tag:last-child::after{ content:''; }
.project-tag.security{ color:var(--negative); }
.project-card h3{ font-family:'Space Grotesk',sans-serif; font-size:17px; font-weight:600; margin-bottom:9px; }
.project-card p{ font-size:12.5px; color:var(--text-dim); line-height:1.6; margin-bottom:18px; flex:1; }
.project-card .link{ font-size:12.5px; color:var(--text); font-weight:500; margin-top:auto; border-bottom:1px solid var(--accent); padding-bottom:1px; align-self:flex-start; }
@media (max-width:720px){ .project-grid{ grid-template-columns:1fr; } }

/* ---------- Tools list (About section) ---------- */
.tools-block{ border-top:1px solid var(--border-soft); }
.tools-row{
  display:flex; justify-content:space-between; align-items:baseline; gap:20px;
  padding:14px 0; border-bottom:1px solid var(--border-soft); flex-wrap:wrap;
}
.tools-label{ font-size:11px; font-family:'IBM Plex Mono',monospace; letter-spacing:0.04em; color:var(--text-faint); text-transform:uppercase; flex-shrink:0; }
.tools-chips{ font-size:13.5px; color:var(--text); text-align:right; }
@media (max-width:600px){
  .tools-row{ flex-direction:column; gap:4px; }
  .tools-chips{ text-align:left; }
}

/* ---------- Footer ---------- */
.site-footer{
  border-top:1px solid var(--border); padding:40px 0; margin-top:20px;
}
.footer-row{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px; }
.footer-brand{ font-family:'Space Grotesk',sans-serif; font-size:14px; font-weight:600; }
.footer-meta{ font-size:11.5px; color:var(--text-faint); font-family:'IBM Plex Mono',monospace; }
.footer-links{ display:flex; gap:20px; }
.footer-links a{ font-size:12px; color:var(--text-dim); }
.footer-links a:hover{ color:var(--accent); }

/* ---------- Case study article ---------- */
.case-header{ padding:64px 0 40px; border-bottom:1px solid var(--border); }
.case-header .back-link{ font-size:12.5px; color:var(--text-dim); margin-bottom:24px; display:inline-block; }
.case-header .back-link:hover{ color:var(--accent); }
.case-header h1{ font-family:'Space Grotesk',sans-serif; font-size:38px; font-weight:600; margin-bottom:14px; max-width:800px; }
.case-header .dek{ font-size:16px; color:var(--text-dim); max-width:680px; margin-bottom:24px; line-height:1.7; }
.case-meta{ display:flex; gap:28px; flex-wrap:wrap; margin-bottom:20px; }
.case-meta-item .label{ font-size:10px; letter-spacing:0.06em; text-transform:uppercase; color:var(--text-faint); margin-bottom:4px; }
.case-meta-item .value{ font-size:13px; color:var(--text); }
.case-meta-item .value a{ color:var(--accent); }
.disclaimer{
  font-size:12.5px; color:var(--accent); background:var(--accent-dim);
  border-radius:2px; padding:12px 16px; line-height:1.6; max-width:800px;
}

.case-body{ padding:48px 0; max-width:760px; }
.case-body h2{ font-family:'Space Grotesk',sans-serif; font-size:22px; font-weight:600; margin:44px 0 16px; }
.case-body h2:first-child{ margin-top:0; }
.case-body p{ font-size:14.5px; color:var(--text-dim); line-height:1.8; margin-bottom:16px; }
.case-body strong{ color:var(--text); }
.case-body ul{ margin:0 0 16px 20px; color:var(--text-dim); font-size:14.5px; line-height:1.8; }
.case-figure{ margin:28px 0; }
.case-figure img{ border-radius:var(--radius); border:1px solid var(--border); }
.case-figure figcaption{ font-size:12px; color:var(--text-faint); margin-top:10px; line-height:1.6; }
.case-divider{ border:none; border-top:1px solid var(--border); margin:44px 0; }