:root{
  --bg:#14161C;
  --surface:#1D2029;
  --surface2:#22262F;
  --border:#2C3040;
  --text:#E8E6E1;
  --muted:#8B8F9C;
  --tier1:#D9A441;
  --tier2:#5B8A9B;
  --tier3:#7A8B6F;
  --danger:#B85C5C;
  --mono:'JetBrains Mono', monospace;
  --sans:'Inter', sans-serif;
  --sidebar-w:264px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit; text-decoration:none;}
::selection{background:var(--tier1); color:#14161C;}

/* ===== App shell ===== */
.app{
  display:flex;
  align-items:flex-start;
  min-height:100vh;
}

/* ===== Sidebar ===== */
.sidebar{
  width:var(--sidebar-w);
  flex-shrink:0;
  position:sticky;
  top:0;
  height:100vh;
  overflow-y:auto;
  background:var(--surface);
  border-right:1px solid var(--border);
  padding:22px 18px 32px;
  z-index:60;
}
.sidebar .brand{
  font-family:var(--mono);
  font-weight:700;
  font-size:13px;
  letter-spacing:0.06em;
  color:var(--tier1);
  display:block;
  margin-bottom:20px;
}
.sidebar .brand span{color:var(--muted); font-weight:500;}

/* search */
.search-wrap{position:relative; margin-bottom:22px;}
.search-input{
  width:100%;
  background:var(--surface2);
  border:1px solid var(--border);
  color:var(--text);
  font-family:var(--sans);
  font-size:13px;
  padding:9px 10px 9px 30px;
  border-radius:6px;
  outline:none;
}
.search-input:focus{border-color:var(--tier1);}
.search-icon{
  position:absolute; left:9px; top:50%; transform:translateY(-50%);
  color:var(--muted); font-size:12px; pointer-events:none;
  font-family:var(--mono);
}
.search-results{
  position:absolute; top:calc(100% + 6px); left:0; right:0;
  background:var(--surface2);
  border:1px solid var(--border);
  border-radius:6px;
  max-height:360px;
  overflow-y:auto;
  display:none;
  box-shadow:0 12px 28px rgba(0,0,0,0.4);
  z-index:80;
}
.search-results.open{display:block;}
.search-result{
  display:block;
  padding:9px 12px;
  border-bottom:1px solid var(--border);
  cursor:pointer;
}
.search-result:last-child{border-bottom:none;}
.search-result:hover, .search-result.active{background:var(--surface);}
.search-result .r-title{font-size:12.5px; font-weight:600; color:var(--text);}
.search-result .r-section{font-family:var(--mono); font-size:10px; color:var(--muted); text-transform:uppercase; letter-spacing:0.05em; margin-top:2px;}
.search-empty{padding:14px 12px; font-size:12.5px; color:var(--muted);}

.nav-group-label{
  font-family:var(--mono); font-size:10.5px; text-transform:uppercase;
  letter-spacing:0.1em; color:var(--muted); margin:18px 0 8px 6px;
}
.nav-list{list-style:none; margin:0; padding:0;}
.nav-list li{margin-bottom:2px;}
.nav-list a{
  display:flex; align-items:center; gap:9px;
  padding:8px 10px;
  border-radius:6px;
  font-size:13.5px;
  color:var(--muted);
  border-left:2px solid transparent;
  transition:background .12s ease, color .12s ease;
}
.nav-list a:hover{background:var(--surface2); color:var(--text);}
.nav-list a.active{
  background:var(--surface2);
  color:var(--text);
  border-left-color:var(--tier1);
  font-weight:600;
}
.nav-dot{width:6px; height:6px; border-radius:50%; background:var(--muted); flex-shrink:0;}
.nav-list a.active .nav-dot{background:var(--tier1);}

/* mobile toggle */
.mobile-topbar{display:none;}
@media (max-width:880px){
  .mobile-topbar{
    display:flex; align-items:center; gap:12px;
    position:sticky; top:0; z-index:70;
    background:rgba(20,22,28,0.95);
    backdrop-filter:blur(8px);
    border-bottom:1px solid var(--border);
    padding:12px 16px;
  }
  .mobile-topbar .brand{
    font-family:var(--mono); font-weight:700; font-size:12.5px; color:var(--tier1);
  }
  .mobile-toggle{
    background:none; border:1px solid var(--border); color:var(--text);
    border-radius:6px; padding:6px 10px; font-size:14px; cursor:pointer;
  }
  .sidebar{
    position:fixed; top:0; left:0; height:100vh;
    transform:translateX(-100%);
    transition:transform .18s ease;
    box-shadow:0 0 0 100vmax rgba(0,0,0,0);
  }
  .sidebar.open{
    transform:translateX(0);
    box-shadow:0 0 0 100vmax rgba(0,0,0,0.5);
  }
}

/* ===== Main content ===== */
main{flex:1; min-width:0;}
section{
  padding:64px 48px;
  max-width:1000px;
  margin:0 auto;
}
@media (max-width:880px){
  section{padding:40px 22px;}
}
.eyebrow{
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--muted);
  margin:0 0 10px 0;
}
h1,h2,h3{
  font-family:var(--sans);
  font-weight:800;
  letter-spacing:-0.01em;
  margin:0;
}
h2{font-size:30px; margin-bottom:8px;}
.sub{color:var(--muted); font-size:15px; max-width:640px; margin-bottom:36px;}

.crumb{
  font-family:var(--mono); font-size:12px; color:var(--muted);
  margin-bottom:18px;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--tier1);}

/* ===== Hero ===== */
.hero{padding:72px 48px 48px; text-align:left;}
@media (max-width:880px){.hero{padding:36px 22px 24px;}}
.hero h1{font-size:clamp(32px, 4.6vw, 50px); line-height:1.05; max-width:820px;}
.hero .accent{color:var(--tier1);}
.hero p.lead{font-size:17px; color:var(--muted); max-width:600px; margin-top:20px;}
.hero .tags{display:flex; gap:10px; margin-top:28px; flex-wrap:wrap;}
.tag{
  font-family:var(--mono); font-size:11.5px;
  border:1px solid var(--border);
  padding:6px 10px; border-radius:4px;
  color:var(--muted);
}

/* ===== Tier lanes ===== */
.lanes{margin-top:52px; display:flex; flex-direction:column; gap:14px;}
.lane{
  position:relative;
  border:1px solid var(--border);
  border-left:6px solid var(--lane-color);
  background:var(--surface);
  border-radius:6px;
  padding:20px 24px;
  transition:transform .15s ease, background .15s ease;
}
.lane:hover{background:var(--surface2); transform:translateX(4px);}
.lane1{width:32%; --lane-color:var(--tier1);}
.lane2{width:62%; --lane-color:var(--tier2);}
.lane3{width:100%; --lane-color:var(--tier3);}
.lane-top{display:flex; align-items:baseline; justify-content:space-between; gap:12px; flex-wrap:wrap;}
.lane-name{font-weight:700; font-size:16px;}
.lane-days{font-family:var(--mono); font-size:13px; color:var(--muted);}
.lane-desc{font-size:13.5px; color:var(--muted); margin-top:6px;}
@media (max-width:720px){.lane1,.lane2,.lane3{width:100%;}}

/* ===== Tier detail cards ===== */
.tier-grid{display:grid; grid-template-columns:repeat(3, 1fr); gap:20px;}
@media (max-width:900px){.tier-grid{grid-template-columns:1fr;}}
.tier-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-top:3px solid var(--card-color);
  border-radius:8px;
  padding:26px 24px;
  scroll-margin-top:24px;
}
.tc1{--card-color:var(--tier1);}
.tc2{--card-color:var(--tier2);}
.tc3{--card-color:var(--tier3);}
.tier-card .num{font-family:var(--mono); font-size:12px; color:var(--card-color); font-weight:700;}
.tier-card h3{font-size:19px; margin-top:6px;}
.tier-card .days{font-family:var(--mono); font-size:12.5px; color:var(--muted); margin-top:4px;}
.tier-card ul{padding-left:18px; margin:16px 0 0 0; font-size:13.5px; color:var(--text);}
.tier-card ul li{margin-bottom:8px;}
.tier-card .label{
  font-family:var(--mono); font-size:10.5px; text-transform:uppercase;
  letter-spacing:0.08em; color:var(--muted); margin-top:18px; margin-bottom:6px;
}
.tier-card .oos{font-size:13px; color:var(--muted); font-style:italic;}

/* ===== Stack grid ===== */
.stack-grid{display:grid; grid-template-columns:repeat(auto-fit, minmax(240px, 1fr)); gap:16px;}
.stack-item{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:8px;
  padding:20px;
  scroll-margin-top:24px;
}
.stack-item .head{display:flex; align-items:center; gap:10px; margin-bottom:10px;}
.stack-item .dot{width:8px; height:8px; border-radius:50%; background:var(--dot, var(--tier1)); flex-shrink:0;}
.stack-item .name{font-weight:700; font-size:14.5px; font-family:var(--mono);}
.stack-item .desc{font-size:13px; color:var(--muted);}
.stack-item .scope{
  display:inline-block; margin-top:10px;
  font-family:var(--mono); font-size:10.5px;
  border:1px solid var(--border); border-radius:3px;
  padding:3px 7px; color:var(--muted);
}

.banned{
  margin-top:20px;
  border:1px solid var(--danger);
  background:rgba(184,92,92,0.08);
  border-radius:8px;
  padding:18px 20px;
  display:flex; align-items:flex-start; gap:14px;
  scroll-margin-top:24px;
}
.banned .x{font-family:var(--mono); font-weight:800; color:var(--danger); font-size:18px;}
.banned .txt strong{color:var(--danger);}
.banned .txt{font-size:14px; color:var(--text);}

/* ===== Decision flow ===== */
.flow-wrap{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:10px;
  padding:32px;
  overflow-x:auto;
}
.flow{min-width:640px;}

/* ===== Governance ===== */
.gov-steps{
  display:flex; flex-direction:column; gap:0;
  border:1px solid var(--border);
  border-radius:8px;
  overflow:hidden;
}
.gov-step{
  display:flex; gap:20px;
  padding:20px 24px;
  background:var(--surface);
  border-bottom:1px solid var(--border);
  scroll-margin-top:24px;
}
.gov-step:last-child{border-bottom:none;}
.gov-step .idx{
  font-family:var(--mono); font-weight:700; color:var(--tier1); font-size:14px;
  flex-shrink:0; width:24px;
}
.gov-step .content h4{margin:0 0 4px 0; font-size:14.5px; font-weight:700;}
.gov-step .content p{margin:0; font-size:13.5px; color:var(--muted);}

/* ===== Claude Code section ===== */
.cc-grid{display:grid; grid-template-columns:1fr 1fr 1fr; gap:20px;}
@media (max-width:900px){.cc-grid{grid-template-columns:1fr;}}
.cc-card{
  background:var(--surface); border:1px solid var(--border); border-radius:8px;
  padding:22px;
  scroll-margin-top:24px;
}
.cc-card .tier-tag{
  font-family:var(--mono); font-size:11px; padding:3px 8px; border-radius:3px;
  display:inline-block; margin-bottom:12px;
}
.cc-card.t1 .tier-tag{background:rgba(217,164,65,0.15); color:var(--tier1);}
.cc-card.t2 .tier-tag{background:rgba(91,138,155,0.15); color:var(--tier2);}
.cc-card.t3 .tier-tag{background:rgba(122,139,111,0.15); color:var(--tier3);}
.cc-card code{
  font-family:var(--mono); font-size:12px; background:var(--surface2);
  padding:2px 5px; border-radius:3px;
}
.cc-card ul{padding-left:16px; font-size:13.5px; margin:10px 0 0 0;}
.cc-card ul li{margin-bottom:7px;}

.cursor-note{
  margin-top:24px;
  border:1px solid var(--border);
  border-radius:8px;
  padding:20px 22px;
  background:var(--surface);
  font-size:14px;
  scroll-margin-top:24px;
}
.cursor-note .k{color:var(--tier1); font-family:var(--mono); font-weight:700; font-size:12px; letter-spacing:0.05em;}

/* ===== Bedrock page ===== */
.code-block{
  background:#0F1116;
  border:1px solid var(--border);
  border-radius:8px;
  padding:18px 20px;
  font-family:var(--mono);
  font-size:12.5px;
  color:#B8E6B0;
  overflow-x:auto;
  white-space:pre;
  line-height:1.6;
}
.bedrock-steps{counter-reset:bstep;}
.bstep{
  counter-increment:bstep;
  position:relative;
  padding-left:44px;
  margin-bottom:28px;
  scroll-margin-top:24px;
}
.bstep::before{
  content:counter(bstep);
  position:absolute; left:0; top:0;
  width:30px; height:30px;
  background:var(--surface2);
  border:1px solid var(--border);
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-family:var(--mono); font-weight:700; font-size:13px; color:var(--tier1);
}
.bstep h4{margin:2px 0 6px 0; font-size:15px;}
.bstep p{margin:0 0 10px 0; font-size:13.5px; color:var(--muted);}

.rate-table{width:100%; border-collapse:collapse; margin-top:12px; font-size:13.5px;}
.rate-table th, .rate-table td{text-align:left; padding:10px 14px; border-bottom:1px solid var(--border);}
.rate-table th{font-family:var(--mono); font-size:11px; text-transform:uppercase; color:var(--muted); letter-spacing:0.05em;}
.rate-table td.tier-cell{font-family:var(--mono); font-weight:700;}

/* ===== Page nav (prev/next) ===== */
.page-nav{
  display:flex; justify-content:space-between; gap:16px;
  margin-top:56px; padding-top:24px; border-top:1px solid var(--border);
}
.page-nav a{
  border:1px solid var(--border); border-radius:8px;
  padding:14px 16px; font-size:13.5px; max-width:46%;
  background:var(--surface);
}
.page-nav a:hover{border-color:var(--tier1);}
.page-nav .dir{display:block; font-family:var(--mono); font-size:10.5px; color:var(--muted); text-transform:uppercase; letter-spacing:0.06em; margin-bottom:4px;}
.page-nav .next{margin-left:auto; text-align:right;}

footer{
  padding:40px 32px 80px;
  text-align:center;
  color:var(--muted);
  font-family:var(--mono);
  font-size:11.5px;
  letter-spacing:0.04em;
}