/* codex-plan-ledger site. Warm document style: ivory background, warm near-black
   text, terracotta accent, left-aligned narrow column. No gradients, no blur. */
:root{
  --bg:#FAF6F1;--bg2:#F3EDE4;--card:#FFFCF8;--code:#F0EBE3;--fg:#1C1917;--muted:#6F6863;--line:#E7E0D6;
  --acc:#D97757;--acc-ink:#A84F2E;--btn:#B5532F;--btn-hover:#A84F2E;--acc-fg:#FFFCF8;--acc-bg:#F3E0D8;--warn-bg:#F5E6C8;--warn:#7A4E12;--ok:#3F6B4A;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,"Songti SC","Noto Serif SC",Georgia,serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#1C1917;--bg2:#292524;--card:#292524;--code:#33302D;--fg:#FAF6F1;--muted:#A8A29E;--line:#44403C;
  --acc:#E8956F;--acc-ink:#E8956F;--btn:#E8956F;--btn-hover:#F0A783;--acc-fg:#1C1917;--acc-bg:#3D2A22;--warn-bg:#3D2E16;--warn:#E8C07A;--ok:#8FBF98;
}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.7 var(--sans)}
a{color:var(--acc-ink);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:2px solid var(--acc);outline-offset:3px;border-radius:3px}
.skip{position:absolute;left:-999px;top:8px;background:var(--card);padding:8px 12px;border:1px solid var(--line);border-radius:6px;z-index:10}
.skip:focus{left:12px}
.col{max-width:760px;margin:0 auto;padding:0 24px}
.wide{max-width:880px;margin:0 auto;padding:0 24px}

header.top{background:var(--bg);border-bottom:1px solid var(--line)}
header.top .col{display:flex;align-items:center;gap:20px;min-height:60px;flex-wrap:wrap}
.brand{font-weight:600;color:var(--fg);text-decoration:none;font-family:var(--mono);font-size:15px;display:inline-flex;align-items:center;gap:9px}
.brand img{display:block;width:24px;height:24px}
nav.links{display:flex;gap:20px;margin-left:auto;align-items:center;flex-wrap:wrap;font-size:15px}
nav.links a{color:var(--muted);text-decoration:none}
nav.links a:hover{color:var(--fg)}
.lang{color:var(--muted)}
.lang [aria-current]{color:var(--fg);font-weight:600}

h1,h2{font-family:var(--serif);font-weight:600;color:var(--fg)}
h1{font-size:clamp(30px,4.2vw,42px);line-height:1.18;letter-spacing:-.02em;margin:0 0 20px}
h2{font-size:clamp(23px,2.8vw,28px);line-height:1.3;letter-spacing:-.01em;margin:0 0 16px}
h3{font-size:17px;margin:0;font-weight:600}
h1 code,h2 code{font-family:var(--mono);font-size:.8em;font-weight:500;letter-spacing:-.01em;background:none;padding:0;color:var(--acc-ink)}
p{margin:0 0 16px}
code{font-family:var(--mono);font-size:.86em;background:var(--code);padding:1px 5px;border-radius:4px}

.hero{padding:72px 0 56px}
.status{display:inline-block;font-size:14px;color:var(--warn);background:var(--warn-bg);padding:2px 10px;border-radius:4px;margin:0 0 24px}
.lede{font-size:19px;line-height:1.65;margin:0 0 18px}
.measured{color:var(--muted);font-size:16px;margin:0 0 28px}
.install{display:flex;align-items:stretch;border:1px solid var(--line);border-radius:8px;background:var(--code);overflow:hidden}
.install code{flex:1;background:none;padding:12px 16px;font-size:14px;line-height:1.5;overflow-x:auto;white-space:nowrap;border-radius:0}
.install button{font:inherit;font-size:14px;border:0;border-left:1px solid var(--line);background:var(--card);color:var(--fg);padding:0 16px;cursor:pointer;min-height:44px}
.install button:hover{color:var(--acc-ink)}
#copied{min-height:1.6em;color:var(--muted);font-size:14px;margin:6px 0 14px}
.actions{display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;min-height:42px;padding:0 18px;border-radius:8px;background:var(--btn);color:var(--acc-fg);text-decoration:none;font-size:15px;font-weight:600;border:0;box-shadow:0 1px 2px rgba(28,25,23,.06)}
.btn:hover{background:var(--btn-hover)}

section{padding:64px 0;border-top:1px solid var(--line)}
section.alt{background:var(--bg2)}
.intro{color:var(--muted);margin-bottom:28px}

ol.steps{list-style:none;padding:0;margin:0 0 40px;counter-reset:s}
ol.steps li{display:grid;grid-template-columns:44px 1fr;gap:0 8px;padding:16px 0;border-top:1px solid var(--line);counter-increment:s}
ol.steps li:last-child{border-bottom:1px solid var(--line)}
ol.steps li::before{content:counter(s,decimal-leading-zero);font-family:var(--mono);font-size:14px;color:var(--acc-ink);padding-top:2px;grid-row:span 2}
ol.steps p{margin:2px 0 0;color:var(--muted);font-size:16px}

figure{margin:0}
figure img,figure video{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:8px;background:var(--card)}
figcaption{color:var(--muted);font-size:14px;margin-top:10px}

.split{display:grid;grid-template-columns:5fr 6fr;gap:40px;align-items:start}
ul.plain{padding-left:20px;margin:0}
ul.plain li{margin:6px 0}

.demo{border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--card)}
.demo-bar{padding:8px 14px;border-bottom:1px solid var(--line);font:13px var(--mono);color:var(--muted)}
.demo iframe{display:block;width:100%;height:720px;border:0;background:#fff}
.small{font-size:15px;color:var(--muted);margin-top:12px}

.callout{border-left:3px solid var(--warn);background:var(--card);padding:14px 18px;margin:0 0 28px;border-radius:0 6px 6px 0}
.callout p:last-child{margin:0}
.callout .label{display:block;font-size:13px;font-weight:600;color:var(--warn);text-transform:uppercase;letter-spacing:.04em;margin-bottom:4px}

.table{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--card);margin:0 0 20px}
table{border-collapse:collapse;width:100%;font-size:15px;min-width:600px}
caption{text-align:left;padding:12px 16px;color:var(--muted);font-size:14px;caption-side:bottom;border-top:1px solid var(--line)}
th,td{padding:10px 16px;text-align:left;vertical-align:top;border-top:1px solid var(--line)}
thead th{background:var(--bg2);font-weight:600;font-size:14px;border-top:0}
td.num{font-variant-numeric:tabular-nums;white-space:nowrap}
td.ok{color:var(--ok)}

footer{padding:40px 0 56px;color:var(--muted);font-size:14px;border-top:1px solid var(--line)}
footer p{margin:0 0 6px}
footer a{color:var(--muted)}

@media (max-width:760px){
  body{font-size:16px}
  .hero{padding:48px 0 40px}
  section{padding:40px 0}
  .split{grid-template-columns:1fr;gap:24px}
  .demo iframe{height:600px}
  nav.links .opt{display:none}
  .install{flex-direction:column}
  .install code{white-space:pre-wrap;word-break:break-all}
  .install button{border-left:0;border-top:1px solid var(--line)}
}

/* hero v2: value first, video, three points, status lower */
.eyebrow{font-size:15px;color:var(--muted);margin:0 0 14px}
.eyebrow code{background:none;padding:0;color:var(--acc-ink)}
.hero h1{max-width:none}

figure.video{margin:12px 0 36px}
figure.video video{display:block;width:100%;height:auto;border-radius:12px;border:1px solid var(--line);background:var(--bg2);box-shadow:0 12px 40px rgba(28,25,23,.10)}
ul.points{list-style:none;padding:0;margin:0 0 28px}
ul.points li{padding:14px 0;border-top:1px solid var(--line)}
ul.points li:last-child{border-bottom:1px solid var(--line)}
ul.points strong{font-weight:600;margin-right:4px}
.status-line{margin:28px 0 0;font-size:15px;color:var(--muted)}
.status-line .status{margin:0 8px 0 0;font-size:13px}
figure img[src$=".svg"]{border:0;background:none;border-radius:0}

/* round 5: why block, UML figure */
ol.why{margin:8px 0 0;padding:0;list-style:none;counter-reset:why;max-width:60ch}
ol.why li{counter-increment:why;position:relative;padding:0 0 0 40px;margin:0 0 14px;font-size:17px;line-height:1.6}
ol.why li::before{content:counter(why);position:absolute;left:0;top:1px;width:26px;height:26px;border-radius:50%;background:var(--acc-bg);color:var(--acc-ink);font:600 14px/26px var(--mono);text-align:center}
figure.uml{margin:8px 0 28px}
figure.uml img{border-radius:12px}
#how .steps{margin-top:0}