/* Copper Sentinel - site styles. Desert-night base, copper primary, thermal-green accent. */
:root{
  --bg:#0D1015; --bg-2:#10141a; --surface:#161B23; --surface-2:#1D242F; --line:#2A3240; --line-2:#36404f;
  --text:#ECE7DF; --muted:#98A1AD; --faint:#858e9a;
  --primary:#C8743A; --primary-2:#E08C4F; --primary-ink:#0D1015; --primary-soft:rgba(200,116,58,.14);
  --accent:#5FD4B0; --accent-soft:rgba(95,212,176,.13);
  --alert:#E5484D; --alert-soft:rgba(229,72,77,.14); --warn:#E6B450;
  --shadow:0 1px 0 rgba(255,255,255,.03) inset, 0 18px 40px -24px rgba(0,0,0,.7);
  --radius:14px; --radius-s:9px;
  --font-head:"Space Grotesk",system-ui,sans-serif; --font-body:"IBM Plex Sans",system-ui,sans-serif; --font-mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;
  --maxw:1180px; --gutter:clamp(16px,4vw,40px);
  color-scheme:dark;
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){
    --bg:#F5F1EA; --bg-2:#EEE8DE; --surface:#FFFFFF; --surface-2:#F1EBE2; --line:#DCD3C5; --line-2:#CBBFAE;
    --text:#1A1D22; --muted:#56606C; --faint:#5f6771;
    --primary:#9A501C; --primary-2:#84420F; --primary-ink:#FFFFFF; --primary-soft:rgba(154,80,28,.10);
    --accent:#137559; --accent-soft:rgba(19,117,89,.10);
    --alert:#C42F35; --alert-soft:rgba(196,47,53,.09); --warn:#855c00;
    --shadow:0 1px 2px rgba(40,30,20,.05), 0 16px 34px -24px rgba(40,30,20,.35);
    color-scheme:light;
  }
}
:root[data-theme="light"]{
  --bg:#F5F1EA; --bg-2:#EEE8DE; --surface:#FFFFFF; --surface-2:#F1EBE2; --line:#DCD3C5; --line-2:#CBBFAE;
  --text:#1A1D22; --muted:#56606C; --faint:#5f6771;
  --primary:#9A501C; --primary-2:#84420F; --primary-ink:#FFFFFF; --primary-soft:rgba(154,80,28,.10);
  --accent:#137559; --accent-soft:rgba(19,117,89,.10);
  --alert:#C42F35; --alert-soft:rgba(196,47,53,.09); --warn:#855c00;
  --shadow:0 1px 2px rgba(40,30,20,.05), 0 16px 34px -24px rgba(40,30,20,.35);
  color-scheme:light;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*{animation-duration:.001ms!important;animation-iteration-count:1!important;transition:none!important}}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.6 var(--font-body);overflow-x:hidden}
img,svg{max-width:100%}
a{color:var(--primary-2)}
:root[data-theme="light"] a{color:var(--primary)}
a:hover{text-decoration-thickness:2px}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.12;letter-spacing:-.015em;margin:0 0 .5em;font-weight:600}
h1{font-size:clamp(2.1rem,5.4vw,3.9rem);letter-spacing:-.03em}
h2{font-size:clamp(1.6rem,3.4vw,2.4rem);letter-spacing:-.02em}
h3{font-size:1.18rem}
p{margin:0 0 1em}
code,kbd,.mono{font-family:var(--font-mono);font-size:.92em}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;background:var(--primary);color:var(--primary-ink);padding:8px 12px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.muted{color:var(--muted)} .faint{color:var(--faint)}
.eyebrow{font-family:var(--font-mono);font-size:.76rem;letter-spacing:.14em;text-transform:uppercase;color:var(--primary-2);margin-bottom:.9em;display:inline-flex;gap:.6em;align-items:center}
:root[data-theme="light"] .eyebrow{color:var(--primary)}
@media (prefers-color-scheme: light){:root:not([data-theme="dark"]) .eyebrow,:root:not([data-theme="dark"]) a{color:var(--primary)}}
.eyebrow::before{content:"";width:18px;height:1px;background:currentColor}

/* Header */
.site-head{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.3) blur(10px);-webkit-backdrop-filter:saturate(1.3) blur(10px);border-bottom:1px solid var(--line)}
.head-row{display:flex;align-items:center;gap:18px;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)!important;font-family:var(--font-head);font-weight:600;font-size:1.06rem;letter-spacing:-.01em;white-space:nowrap}
.brand svg{width:28px;height:28px;flex:none}
.nav{display:flex;gap:2px;margin-left:auto;align-items:center}
.nav a{color:var(--muted)!important;text-decoration:none;font-size:.93rem;padding:8px 11px;border-radius:8px}
.nav a:hover{color:var(--text)!important;background:var(--surface)}
.nav a[aria-current="page"]{color:var(--text)!important;background:var(--surface-2)}
.head-actions{display:flex;gap:8px;align-items:center}
.icon-btn{width:38px;height:38px;border-radius:9px;border:1px solid var(--line);background:var(--surface);color:var(--text);display:grid;place-items:center;cursor:pointer}
.icon-btn:hover{border-color:var(--line-2)}
.menu-btn{display:none}
@media (max-width:980px){
  .nav{position:fixed;inset:64px 0 auto 0;flex-direction:column;align-items:stretch;background:var(--bg);border-bottom:1px solid var(--line);padding:10px var(--gutter) 18px;display:none;margin:0}
  .nav.open{display:flex}
  .nav a{padding:12px 10px;font-size:1rem}
  .menu-btn{display:grid}
  .head-actions{margin-left:auto}
  .head-actions .btn-sm{display:none}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.55em;font:600 .97rem/1 var(--font-head);padding:13px 20px;border-radius:10px;border:1px solid transparent;text-decoration:none;cursor:pointer;transition:transform .12s ease,background .15s ease,border-color .15s ease}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:var(--primary-ink)!important}
.btn-primary:hover{background:var(--primary-2)}
.btn-ghost{background:transparent;border-color:var(--line-2);color:var(--text)!important}
.btn-ghost:hover{background:var(--surface)}
.btn-sm{padding:9px 14px;font-size:.88rem}
.btn-row{display:flex;flex-wrap:wrap;gap:12px}

/* Sections */
section{padding:clamp(56px,8vw,104px) 0}
.section-head{max-width:760px;margin-bottom:clamp(28px,4vw,48px)}
.section-head p{color:var(--muted);font-size:1.08rem}
.band{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:900px){.g3,.g4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:640px){.g2,.g3,.g4{grid-template-columns:minmax(0,1fr)}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);min-width:0}
.card h3{margin-bottom:.4em}
.card p:last-child{margin-bottom:0}
.card.flat{box-shadow:none}
.kicker{font-family:var(--font-mono);font-size:.74rem;color:var(--faint);letter-spacing:.08em;text-transform:uppercase}

/* Hero */
.hero{padding:clamp(40px,7vw,86px) 0 clamp(48px,7vw,90px);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(900px 420px at 85% 10%,var(--primary-soft),transparent 60%),radial-gradient(600px 380px at 10% 90%,var(--accent-soft),transparent 60%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(24px,4vw,56px);align-items:center;position:relative}
@media (max-width:900px){.hero-grid{grid-template-columns:1fr}}
.hero p.lede{font-size:clamp(1.05rem,1.6vw,1.22rem);color:var(--muted);max-width:40em}
.hero h1 em{font-style:normal;color:var(--primary-2)}
:root[data-theme="light"] .hero h1 em{color:var(--primary)}
.proto-flag{display:inline-flex;gap:8px;align-items:center;font:500 .8rem/1 var(--font-mono);padding:7px 10px;border:1px dashed var(--line-2);border-radius:999px;color:var(--muted);margin-bottom:18px}
.proto-flag .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.hero-art{position:relative;border:1px solid var(--line);border-radius:18px;background:linear-gradient(180deg,#0a0d12,#111720);overflow:hidden;aspect-ratio:5/4;box-shadow:var(--shadow)}
.hero-art svg{display:block;width:100%;height:100%}
.hero-art .hud{position:absolute;left:12px;right:12px;bottom:12px;display:flex;justify-content:space-between;gap:8px;font:500 .74rem/1.3 var(--font-mono);color:#cfd6df;flex-wrap:wrap}
.hud span{background:rgba(13,16,21,.78);border:1px solid #2a3240;border-radius:7px;padding:6px 8px}
.hud b{color:#5FD4B0;font-weight:600}
.hud .cu{color:#E08C4F}

/* Finding blocks (red-team voice) */
.finding{border:1px solid var(--line);border-left:3px solid var(--primary);background:var(--surface);border-radius:var(--radius-s);padding:16px 18px;font-size:.95rem}
.finding .fid{font:600 .78rem/1 var(--font-mono);color:var(--primary-2);letter-spacing:.06em}
:root[data-theme="light"] .finding .fid{color:var(--primary)}
.finding dl{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;margin:10px 0 0}
.finding dt{font:500 .76rem/1.6 var(--font-mono);color:var(--faint);text-transform:uppercase;letter-spacing:.05em}
.finding dd{margin:0}
.sev{display:inline-block;font:600 .7rem/1 var(--font-mono);padding:4px 7px;border-radius:5px;letter-spacing:.06em;text-transform:uppercase;vertical-align:middle}
.sev-crit{background:var(--alert-soft);color:var(--alert)}
.sev-high{background:var(--primary-soft);color:var(--primary-2)}
.sev-med{background:rgba(230,180,80,.14);color:var(--warn)}
.sev-low{background:var(--accent-soft);color:var(--accent)}

/* Stats */
.stat{padding:18px 20px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.stat .v{font:600 clamp(1.5rem,3vw,2.1rem)/1.1 var(--font-head);letter-spacing:-.02em}
.stat .l{color:var(--muted);font-size:.88rem;margin-top:6px}
.stat .s{font:500 .72rem/1.4 var(--font-mono);color:var(--faint);margin-top:8px}
.tag{display:inline-block;font:500 .72rem/1 var(--font-mono);padding:5px 8px;border-radius:6px;background:var(--surface-2);border:1px solid var(--line);color:var(--muted);letter-spacing:.03em}
.tag.proj{color:var(--warn);border-color:color-mix(in srgb,var(--warn) 40%,var(--line))}

/* Steps */
.steps{counter-reset:s;display:grid;gap:14px}
.step{display:grid;grid-template-columns:52px 1fr;gap:16px;align-items:start;padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.step::before{counter-increment:s;content:"0" counter(s);font:600 1.1rem/52px var(--font-mono);text-align:center;border-radius:12px;background:var(--primary-soft);color:var(--primary-2);height:52px}
.step h3{margin:.2em 0 .3em}
.step p{margin:0;color:var(--muted)}

/* Layers diagram */
.layers{display:grid;gap:8px}
.layer{display:grid;grid-template-columns:120px 1fr auto;gap:14px;align-items:center;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
.layer .ln{font:600 .8rem/1.2 var(--font-mono);color:var(--primary-2);text-transform:uppercase;letter-spacing:.08em}
.layer .who{font-size:.8rem;color:var(--faint);text-align:right}
@media (max-width:640px){.layer{grid-template-columns:1fr}.layer .who{text-align:left}}

/* Forms / tools */
.tool{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:0;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--surface);box-shadow:var(--shadow)}
@media (max-width:900px){.tool{grid-template-columns:minmax(0,1fr)}}
.tool-in{padding:24px;border-right:1px solid var(--line);background:var(--surface)}
@media (max-width:900px){.tool-in{border-right:0;border-bottom:1px solid var(--line)}}
.tool-out{padding:24px;background:var(--bg-2)}
.field{margin-bottom:16px}
.field label,.flabel{display:flex;justify-content:space-between;gap:10px;font-size:.88rem;color:var(--muted);margin-bottom:6px}
.field label output,.flabel output{font:600 .9rem var(--font-mono);color:var(--text)}
input[type=range]{width:100%;accent-color:var(--primary);height:28px}
select,input[type=number],input[type=text],input[type=email]{width:100%;font:inherit;font-size:.95rem;color:var(--text);background:var(--bg);border:1px solid var(--line-2);border-radius:9px;padding:10px 12px}
select:focus,input:focus{border-color:var(--primary)}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.seg button{font:500 .86rem/1 var(--font-body);padding:9px 12px;border-radius:8px;border:1px solid var(--line-2);background:var(--bg);color:var(--muted);cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--primary);border-color:var(--primary);color:var(--primary-ink)}
.check{display:flex;gap:10px;align-items:flex-start;font-size:.93rem;margin:8px 0;cursor:pointer}
.check input{margin-top:4px;accent-color:var(--primary);width:16px;height:16px}
.big-num{font:600 clamp(2rem,5vw,2.9rem)/1 var(--font-head);letter-spacing:-.03em}
.big-num.cu{color:var(--primary-2)}
:root[data-theme="light"] .big-num.cu{color:var(--primary)}
.rows{width:100%;border-collapse:collapse;font-size:.92rem}
.rows td,.rows th{padding:9px 6px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.rows td:last-child,.rows th:last-child{text-align:right;font-family:var(--font-mono);white-space:nowrap}
.rows tr.total td{font-weight:600;border-bottom:0;border-top:2px solid var(--line-2)}
.rows th{font:500 .74rem/1.3 var(--font-mono);color:var(--faint);text-transform:uppercase;letter-spacing:.05em}
.note{font-size:.82rem;color:var(--faint);line-height:1.5}
.note a{color:inherit}
.bar{height:10px;border-radius:6px;background:var(--surface-2);overflow:hidden;border:1px solid var(--line)}
.bar>i{display:block;height:100%;background:var(--primary);border-radius:6px;transition:width .35s ease}
.bar.acc>i{background:var(--accent)}
.band-meter{position:relative;height:38px;margin:14px 0 6px}
.band-meter .track{position:absolute;left:0;right:0;top:15px;height:8px;border-radius:5px;background:var(--surface-2);border:1px solid var(--line)}
.band-meter .zone{position:absolute;top:15px;height:8px;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 50%,transparent);border-radius:5px}
.band-meter .pin{position:absolute;top:2px;width:2px;height:34px;background:var(--primary);transition:left .3s ease}
.band-meter .pin::after{content:attr(data-l);position:absolute;top:-2px;left:6px;font:600 .72rem var(--font-mono);color:var(--primary-2);white-space:nowrap}

/* Tables (plan etc.) */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;margin:1.2em 0;background:var(--surface)}
.table-wrap table{border-collapse:collapse;width:100%;font-size:.9rem;min-width:520px}
.table-wrap th,.table-wrap td{padding:9px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.table-wrap th{background:var(--surface-2);font-family:var(--font-head);font-weight:600;font-size:.86rem}
.table-wrap tr:last-child td{border-bottom:0}
.table-wrap td.num,.table-wrap th.num{text-align:right;font-family:var(--font-mono);white-space:nowrap}

/* FAQ */
.faq details{border-bottom:1px solid var(--line);padding:4px 0}
.faq summary{cursor:pointer;list-style:none;padding:16px 36px 16px 0;font:600 1.04rem/1.35 var(--font-head);position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:12px;font:400 1.5rem var(--font-mono);color:var(--primary-2)}
.faq details[open] summary::after{content:"-"}
.faq details p{color:var(--muted);margin:0 0 16px}

/* Callouts */
.callout{border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;background:var(--surface);font-size:.94rem}
.callout.warn{border-color:color-mix(in srgb,var(--warn) 45%,var(--line));background:color-mix(in srgb,var(--warn) 7%,var(--surface))}
.callout.ok{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));background:color-mix(in srgb,var(--accent) 6%,var(--surface))}
.callout strong:first-child{font-family:var(--font-head)}

/* CTA */
.cta{border:1px solid var(--line);border-radius:22px;padding:clamp(28px,5vw,56px);background:radial-gradient(600px 300px at 90% 0%,var(--primary-soft),transparent 70%),var(--surface);display:grid;grid-template-columns:1.4fr 1fr;gap:24px;align-items:center}
@media (max-width:800px){.cta{grid-template-columns:1fr}}

/* Footer */
.site-foot{border-top:1px solid var(--line);padding:40px 0 30px;margin-top:20px;background:var(--bg-2)}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:24px}
@media (max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}}
.site-foot h4{font:500 .74rem var(--font-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--faint);margin-bottom:10px}
.site-foot ul{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.site-foot a{color:var(--muted)!important;text-decoration:none;font-size:.92rem}
.site-foot a:hover{color:var(--text)!important}
.foot-legal{margin-top:28px;padding-top:18px;border-top:1px solid var(--line);font-size:.84rem;color:var(--faint);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}

/* Page hero (inner pages) */
.page-hero{padding:clamp(40px,6vw,72px) 0 clamp(24px,4vw,36px);border-bottom:1px solid var(--line);background:radial-gradient(700px 260px at 80% 0%,var(--primary-soft),transparent 70%)}
.page-hero p{color:var(--muted);font-size:1.1rem;max-width:46em}

/* Charts */
.chart-box{position:relative;height:320px}
.chart-box.sm{height:240px}
.legend-row{display:flex;flex-wrap:wrap;gap:14px;font-size:.84rem;color:var(--muted);margin-top:10px}
.legend-row i{display:inline-block;width:12px;height:3px;border-radius:2px;margin-right:6px;vertical-align:middle}

/* Plan doc */
.doc-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:48px;align-items:start}
@media (max-width:980px){.doc-layout{grid-template-columns:minmax(0,1fr)}}
.toc{position:sticky;top:84px;max-height:calc(100vh - 100px);overflow:auto;font-size:.88rem;padding:16px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
@media (max-width:980px){.toc{position:static;max-height:none}}
.toc ul{list-style:none;margin:0;padding:0}
.toc li{margin:3px 0}
.toc ul ul{padding-left:12px;border-left:1px solid var(--line);margin:4px 0 6px 4px}
.toc a{color:var(--muted)!important;text-decoration:none}
.toc a:hover,.toc a.active{color:var(--primary-2)!important}
.doc{max-width:820px;font-size:1rem}
.doc h1{font-size:clamp(1.9rem,4vw,2.7rem)}
.doc h2{margin-top:2.2em;padding-top:.6em;border-top:1px solid var(--line);font-size:1.7rem;scroll-margin-top:84px}
.doc h3{margin-top:1.6em;scroll-margin-top:84px}
.doc blockquote{margin:1.2em 0;padding:14px 18px;border-left:3px solid var(--warn);background:color-mix(in srgb,var(--warn) 7%,var(--surface));border-radius:0 10px 10px 0}
.doc blockquote p:last-child{margin:0}
.doc hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.doc li{margin:.3em 0}
.doc a{word-break:break-word}
.doc table{border-collapse:collapse;width:100%}

/* Utility */
.mt0{margin-top:0}.mb0{margin-bottom:0}.mt1{margin-top:10px}.mt2{margin-top:20px}.mt3{margin-top:32px}
.center{text-align:center}
.flex{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.between{justify-content:space-between}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.pill-link{display:inline-flex;gap:8px;align-items:center;padding:8px 12px;border-radius:999px;background:var(--surface);border:1px solid var(--line);color:var(--text)!important;text-decoration:none;font-size:.88rem}
.fade-in{animation:fade .5s ease both}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@keyframes dash{to{stroke-dashoffset:-40}}
@keyframes pulse{0%,100%{opacity:.35}50%{opacity:1}}
@keyframes sweep{0%{transform:rotate(-38deg)}50%{transform:rotate(38deg)}100%{transform:rotate(-38deg)}}
.doc p,.doc li,.doc td{overflow-wrap:anywhere}