/* ProveBreak — static site styles. System fonts only; no external requests, no scripts.
   Light by default, dark via prefers-color-scheme. One accent (blue); green/amber/red are status colors only. */
:root{
  --bg:#fafafa;--surface:#ffffff;--surface-2:#f4f4f5;--band:#f4f4f5;
  --border:#e4e4e7;--border-strong:#d4d4d8;
  --text:#0b0b0c;--muted:#4b4b53;--dim:#62626b;
  --accent:#2457d6;--accent-hover:#1c46b3;--accent-ink:#ffffff;--accent-soft:rgba(36,87,214,.08);--accent-ring:rgba(36,87,214,.28);
  --green:#17733a;--green-soft:#e6f6ea;--green-border:#b7e3c2;
  --red:#c4202c;--red-soft:#fdecec;
  --amber:#8a5a00;--amber-soft:#fff5d6;--amber-border:#f0d98c;
  --gh-head:#f6f8fa;--term-bg:#f6f8fa;--term-text:#1f2328;
  --header-bg:rgba(250,250,250,.82);
  --shadow-sm:0 1px 2px rgba(16,16,20,.05);
  --shadow:0 1px 2px rgba(16,16,20,.04),0 6px 20px -6px rgba(16,16,20,.08);
  --shadow-lg:0 1px 2px rgba(16,16,20,.05),0 18px 48px -16px rgba(16,16,20,.18);
  --radius-sm:8px;--radius:14px;--radius-lg:18px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI Variable Text","Segoe UI",ui-sans-serif,system-ui,Roboto,"Noto Sans","Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0b0b0d;--surface:#131316;--surface-2:#1a1a1f;--band:#0f0f12;
    --border:#26262c;--border-strong:#34343c;
    --text:#f4f4f5;--muted:#b0b0b9;--dim:#8f8f99;
    --accent:#7ea6ff;--accent-hover:#a3c0ff;--accent-ink:#0b0b0d;--accent-soft:rgba(126,166,255,.12);--accent-ring:rgba(126,166,255,.35);
    --green:#4cc38a;--green-soft:rgba(76,195,138,.12);--green-border:rgba(76,195,138,.32);
    --red:#ff7b85;--red-soft:rgba(255,123,133,.12);
    --amber:#e3b341;--amber-soft:rgba(227,179,65,.12);--amber-border:rgba(227,179,65,.35);
    --gh-head:#161b22;--term-bg:#0d1117;--term-text:#e6edf3;
    --header-bg:rgba(11,11,13,.78);
    --shadow-sm:0 1px 2px rgba(0,0,0,.4);
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px -8px rgba(0,0,0,.5);
    --shadow-lg:0 1px 2px rgba(0,0,0,.4),0 24px 60px -20px rgba(0,0,0,.7);
  }
}

/* Base */
*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
[id]{scroll-margin-top:80px}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
a{color:var(--accent);text-decoration-color:color-mix(in srgb,currentColor 40%,transparent);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{text-decoration-color:currentColor}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:6px}
::selection{background:var(--accent-ring)}
strong,b{font-weight:650}
code,.mono{font-family:var(--mono);font-size:.875em}
code{background:var(--surface-2);border:1px solid var(--border);border-radius:6px;padding:.1em .4em;overflow-wrap:anywhere}
.wrap{width:min(1080px,calc(100% - 48px));margin:0 auto}
.narrow{width:min(720px,calc(100% - 48px));margin:0 auto}
@media (max-width:480px){.wrap,.narrow{width:calc(100% - 36px)}}
.skip{position:absolute;left:-9999px;top:8px;background:var(--text);color:var(--bg);padding:8px 14px;border-radius:8px;z-index:10;text-decoration:none}
.skip:focus{left:8px}

/* Header */
.site-header{position:sticky;top:0;z-index:5;background:var(--header-bg);border-bottom:1px solid var(--border);backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:680;letter-spacing:-.02em;color:var(--text);text-decoration:none;font-size:16px}
.logo img{width:26px;height:26px;display:block}
.nav{display:flex;gap:4px;align-items:center;font-size:14px}
.nav a{color:var(--muted);text-decoration:none;padding:6px 10px;border-radius:8px;font-weight:500}
.nav a:hover{color:var(--text);background:var(--surface-2)}
.nav .btn{margin-left:8px}
@media (max-width:760px){.nav .hide-sm{display:none}}
@media (max-width:400px){.nav a{padding:6px 7px}.nav .btn{margin-left:4px}.logo{gap:8px}}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 18px;border-radius:10px;font-size:15px;font-weight:600;border:1px solid transparent;text-decoration:none;line-height:1.2;transition:background-color .15s,border-color .15s,box-shadow .15s,transform .15s}
.btn-primary{background:var(--accent);color:var(--accent-ink)!important;box-shadow:var(--shadow-sm),inset 0 1px 0 rgba(255,255,255,.12)}
.btn-primary:hover{background:var(--accent-hover)}
.btn-ghost{background:var(--surface);color:var(--text)!important;border-color:var(--border-strong);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{background:var(--surface-2);border-color:var(--dim)}
.btn:focus-visible{outline-offset:2px;border-radius:10px}
@media (prefers-reduced-motion:no-preference){.btn:active{transform:translateY(1px)}}
.nav .btn{min-height:36px;padding:7px 14px;font-size:14px;color:var(--accent-ink)!important}
.nav .btn:hover{background:var(--accent-hover)}

/* Hero */
.hero{padding:104px 0 88px;text-align:center;position:relative}
#main>.wrap:first-child{position:relative}
#main>.wrap:first-child::before{content:"";position:absolute;inset:-64px 0 auto;height:520px;background:radial-gradient(70% 65% at 50% 0%,var(--accent-soft),transparent 70%);pointer-events:none;z-index:-1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--accent);background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow-sm);padding:6px 14px;border-radius:999px;margin-bottom:28px}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
h1{font-size:clamp(34px,5.6vw,60px);line-height:1.06;letter-spacing:-.04em;font-weight:720;margin:0 auto 24px;max-width:900px;text-wrap:balance}
h1 .soft{color:var(--dim)}
.hero-sub{max-width:660px;margin:0 auto 36px;color:var(--muted);font-size:clamp(17px,2vw,19px);line-height:1.6;text-wrap:pretty}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.cta-note{margin-top:14px;font-size:14px;color:var(--dim)}
.trust{display:flex;gap:10px 28px;justify-content:center;flex-wrap:wrap;margin-top:40px;font-size:14px;color:var(--muted);list-style:none}
.trust li{display:inline-flex;align-items:center;gap:8px}
.trust li::before{content:"";width:5px;height:10px;flex:none;border:solid var(--green);border-width:0 2px 2px 0;transform:translateY(-2px) rotate(45deg);margin-right:2px}
@media (max-width:480px){
  .hero{padding:64px 0 56px}
  .cta-row .btn{flex:1 1 100%}
  .trust{flex-direction:column;align-items:center;gap:10px}
}

/* Sections */
section{padding:96px 0;border-top:1px solid var(--border)}
#example,#pricing,#faq{background:var(--band)}
@media (max-width:640px){section{padding:64px 0}}
h2{font-size:clamp(26px,3.4vw,36px);letter-spacing:-.03em;margin-bottom:12px;font-weight:700;line-height:1.15;text-wrap:balance}
h3{font-size:17px;font-weight:650;letter-spacing:-.01em;margin-bottom:8px;line-height:1.35}
.lead{color:var(--muted);margin-bottom:40px;max-width:660px;font-size:18px;line-height:1.6;text-wrap:pretty}
.kicker{font-size:13px;font-weight:600;color:var(--accent);margin-bottom:12px;letter-spacing:.01em}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
@media (max-width:820px){.grid-3{grid-template-columns:1fr}}
@media (max-width:700px){.grid-2{grid-template-columns:1fr}}
.box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.box p{color:var(--muted);font-size:15px}
.num{width:32px;height:32px;border-radius:9px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-size:14px;font-weight:700;margin-bottom:18px;border:1px solid var(--accent-ring)}

/* Proof card — styled after a GitHub check / Job Summary card */
.example-tag{display:inline-block;font-size:12px;font-weight:650;color:var(--amber);background:var(--amber-soft);border:1px solid var(--amber-border);padding:3px 10px;border-radius:999px;margin:-16px 0 20px}
.cards{display:grid;grid-template-columns:1.3fr 1fr;gap:20px;align-items:start}
@media (max-width:860px){.cards{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--border-strong);border-radius:12px;overflow:hidden;box-shadow:var(--shadow-lg)}
.card-head{display:flex;align-items:center;justify-content:space-between;gap:8px 12px;flex-wrap:wrap;padding:12px 16px;border-bottom:1px solid var(--border);background:var(--gh-head)}
.card-title{font-size:14px;font-weight:650;display:flex;align-items:center;gap:10px}
.dot{width:16px;height:16px;border-radius:50%;flex:none;position:relative}
.dot-green{background:var(--green)}
.dot-green::after{content:"";position:absolute;left:5.5px;top:3px;width:4px;height:8px;border:solid var(--surface);border-width:0 2px 2px 0;transform:rotate(45deg)}
.dot-amber{border:2px solid var(--amber)}
.dot-amber::after{content:"";position:absolute;inset:3px;border-radius:50%;background:var(--amber)}
.card-meta{font-size:12px;color:var(--dim);font-family:var(--mono);background:var(--surface);border:1px solid var(--border);border-radius:6px;padding:2px 8px}
.card-body{padding:4px 16px 16px;display:grid}
.kv{display:grid;grid-template-columns:132px 1fr;gap:12px;font-size:14px;padding:11px 0;border-bottom:1px solid var(--border)}
.card-body>.kv:last-child{border-bottom:0;padding-bottom:0}
.kv dt{color:var(--dim)}
.kv dd{color:var(--text);min-width:0;overflow-wrap:anywhere}
.kv code{font-size:12.5px}
@media (max-width:560px){.kv{grid-template-columns:1fr;gap:2px}}
.verdict{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:12.5px;padding:2px 10px;border-radius:999px;border:1px solid transparent}
.verdict-proven{background:var(--green-soft);color:var(--green);border-color:var(--green-border)}
.verdict-cant{background:var(--amber-soft);color:var(--amber);border-color:var(--amber-border)}
pre.term{font-family:var(--mono);font-size:12.5px;background:var(--term-bg);border:1px solid var(--border);border-radius:8px;padding:12px 14px;margin:12px 0;overflow-x:auto;color:var(--term-text);line-height:1.6}
.term .ok{color:var(--green);font-weight:600}.term .bad{color:var(--red);font-weight:600}.term .c{color:var(--dim)}
.card-note{font-size:13px;color:var(--muted);border-top:1px solid var(--border);background:var(--gh-head);padding:12px 16px}

/* Lists */
.checks{list-style:none;display:grid;gap:14px}
.checks li{padding-left:28px;position:relative;color:var(--muted);font-size:15px}
.checks li strong{color:var(--text)}
.checks li::before{content:"";position:absolute;left:2px;top:6px;width:12px;height:12px;border-radius:50%;border:2px solid var(--amber)}
.checks.green li::before{border-color:var(--green)}

/* Proof points */
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:48px}
@media (max-width:820px){.stats{grid-template-columns:1fr}}
.stat{border:1px solid var(--border);border-radius:var(--radius);padding:24px;background:var(--surface);box-shadow:var(--shadow)}
.stat b{display:block;font-size:20px;line-height:1.3;letter-spacing:-.02em;margin-bottom:8px}
.stat span{color:var(--muted);font-size:14px}

/* Pricing */
.plans{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;align-items:stretch}
@media (max-width:980px){.plans{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){.plans{grid-template-columns:1fr}}
.plan{border:1px solid var(--border);border-radius:var(--radius);padding:24px;background:var(--surface);display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow)}
.plan.featured{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft),var(--shadow-lg)}
.plan h3{margin:0}
.plan .price{font-size:34px;font-weight:720;letter-spacing:-.035em;line-height:1.1}
.plan .price small{font-size:14px;color:var(--dim);font-weight:500;letter-spacing:0}
.plan p,.plan li{color:var(--muted);font-size:14px}
.plan ul{list-style:none;display:grid;gap:6px;margin-top:2px}
.plan li::before{content:"✓ ";color:var(--green);font-weight:700}
.plan .btn{margin-top:auto;width:100%}
.tiers{list-style:none;display:grid;gap:0;margin:2px 0}
.tiers li::before{content:none}
.tiers li{display:flex;justify-content:space-between;gap:8px;border-bottom:1px solid var(--border);padding:8px 0}
.tiers li:first-child{padding-top:0}
.tiers li b{color:var(--text)}
.badge-tag{font-size:12px;font-weight:600;color:var(--accent);background:var(--accent-soft);border:1px solid var(--accent-ring);padding:2px 10px;border-radius:999px;width:fit-content}
.guarantee{margin-top:24px;border:1px solid var(--border);border-left:4px solid var(--green);background:var(--surface);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow)}
.guarantee strong{display:block;font-size:17px;margin-bottom:8px;line-height:1.4}
.guarantee p{color:var(--muted);font-size:15px}

/* OSS */
.oss{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
@media (max-width:820px){.oss{grid-template-columns:1fr;gap:28px}}
.oss-badge{display:inline-flex;border-radius:6px;overflow:hidden;font-family:var(--font);font-size:13px;font-weight:600;box-shadow:var(--shadow-sm)}
.oss-badge span:first-child{background:#3f3f46;color:#fafafa;padding:5px 10px}
.oss-badge span:last-child{background:#1a7f37;color:#fff;padding:5px 10px}

/* FAQ */
.faq{display:grid;gap:10px;margin-top:28px}
.faq details{border:1px solid var(--border);border-radius:12px;background:var(--surface);box-shadow:var(--shadow-sm)}
.faq details[open]{box-shadow:var(--shadow)}
.faq summary{cursor:pointer;padding:18px 20px;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px;border-radius:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";flex:none;width:8px;height:8px;border:solid var(--dim);border-width:0 2px 2px 0;transform:translateY(-2px) rotate(45deg);transition:transform .15s}
.faq details[open] summary::after{transform:translateY(2px) rotate(-135deg)}
.faq summary:hover::after{border-color:var(--text)}
.faq details>div{padding:0 20px 20px;color:var(--muted);font-size:15px}
.faq details>div p+p{margin-top:10px}

/* Contact */
.contact{text-align:center}
.contact .lead{margin-left:auto;margin-right:auto;margin-bottom:28px}

/* Footer */
.site-footer{border-top:1px solid var(--border);padding:40px 0 56px;font-size:14px;color:var(--dim);background:var(--surface);line-height:1.8}
.site-footer .wrap{display:flex;justify-content:space-between;gap:20px 32px;flex-wrap:wrap}
.site-footer nav{display:flex;gap:6px 22px;flex-wrap:wrap;align-content:flex-start}
.site-footer a{color:var(--muted);text-decoration:none}
.site-footer a:hover{color:var(--text);text-decoration:underline}

/* Document pages */
.doc{padding:72px 0 96px}
.doc h1{font-size:clamp(32px,4.4vw,44px);text-align:left;margin:0 0 12px}
.doc .updated{color:var(--dim);font-size:14px;margin-bottom:36px;padding-bottom:24px;border-bottom:1px solid var(--border)}
.doc h2{font-size:22px;margin:44px 0 12px}
.doc p,.doc li{color:var(--muted);font-size:16.5px;line-height:1.7}
.doc p+p{margin-top:14px}
.doc ul,.doc ol{padding-left:22px;display:grid;gap:8px;margin-top:12px}
.doc li::marker{color:var(--dim)}
.doc strong{color:var(--text)}
.doc .kicker{color:var(--accent);font-size:13px;font-weight:600}
.about h1{margin-bottom:28px}
.about h1+p{font-size:19px;color:var(--text)}
.table-wrap{overflow-x:auto;margin-top:16px;border:1px solid var(--border);border-radius:12px;background:var(--surface);box-shadow:var(--shadow-sm)}
table{border-collapse:collapse;width:100%;font-size:14px;min-width:560px}
th,td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--border);vertical-align:top}
th{background:var(--surface-2);color:var(--text);font-weight:600;font-size:13px}
td{color:var(--muted)}
tr:last-child td{border-bottom:0}
.callout{border:1px solid var(--amber-border);background:var(--amber-soft);border-radius:12px;padding:14px 18px;margin:20px 0;color:var(--text)!important;font-size:15px}
.nf{text-align:center;padding:128px 0 144px}
.nf .code{font-family:var(--mono);color:var(--accent);font-size:14px;font-weight:600;margin-bottom:16px}
.nf h1{text-align:center}
.nf .lead{margin-left:auto;margin-right:auto}
.hero{border-top:0}
.more{margin-top:28px;font-weight:600}
.lead.tight{margin-bottom:16px}
.muted{color:var(--muted)}
.center{text-align:center}
.mb{margin-bottom:14px;color:var(--dim)!important;font-size:14px}