/* Reinforced Labs — site styles */
:root {
  --paper: #f3f0e8;
  --paper-2: #ebe7dc;
  --card: #fbfaf6;
  --ink: #15161a;
  --ink-2: #3b3d44;
  --ink-3: #6c6e75;
  --rule: #d6d1c3;
  --rule-strong: #15161a;
  --accent: #1f6b4f;
  --accent-ink: #fff;
  --pass: #2f7d5b;
  --warn: #a8741a;
  --fail: #b3321c;
  --code-bg: #15161a;
  --code-ink: #e9e6dc;
  --serif: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --italic: "IBM Plex Serif", Georgia, serif;
  --sans: "IBM Plex Sans", -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --max: 1240px;
  --gut: clamp(16px, 4vw, 40px);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #111214; --paper-2: #18191c; --card: #1b1c20; --ink: #ecE8de; --ink-2: #c4c0b6; --ink-3: #8d8a83;
    --rule: #2d2e33; --rule-strong: #ecE8de; --accent: #5cc195; --pass: #5fae84; --warn: #d6a24a; --fail: #ec6a4f;
    --code-bg: #0a0b0c; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #111214; --paper-2: #18191c; --card: #1b1c20; --ink: #ece8de; --ink-2: #c4c0b6; --ink-3: #8d8a83;
  --rule: #2d2e33; --rule-strong: #ece8de; --accent: #5cc195; --pass: #5fae84; --warn: #d6a24a; --fail: #ec6a4f;
  --code-bg: #0a0b0c; color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 400 17px/1.6 var(--sans); font-feature-settings: "ss02";
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }
::selection { background: var(--accent); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gut); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 100; background: var(--ink); color: var(--paper); padding: 8px 12px; }

/* ---------- type ---------- */
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 500; letter-spacing: -0.025em; line-height: 1.08; margin: 0 0 .5em; }
h1 { font-size: clamp(40px, 6vw, 82px); letter-spacing: -0.042em; line-height: 1.0; }
h1 em, h2 em, .quote em { font-family: var(--italic); font-style: italic; font-weight: 400; letter-spacing: -0.02em; color: var(--accent); }
h2 { font-size: clamp(32px, 4vw, 54px); }
h3 { font-size: clamp(22px, 2.2vw, 28px); line-height: 1.2; }
h4 { font-family: var(--sans); font-weight: 600; font-size: 15px; letter-spacing: 0; margin-bottom: .4em; }
p { margin: 0 0 1em; }
.lede { font-size: clamp(19px, 1.7vw, 22px); line-height: 1.5; color: var(--ink-2); max-width: 40em; }
.mono, .eyebrow, .tag, code, kbd { font-family: var(--mono); }
.eyebrow { font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); display: flex; gap: 12px; align-items: center; margin-bottom: 22px; }
.eyebrow b { color: var(--accent); font-weight: 500; }
.eyebrow::after { content: ""; flex: 0 0 48px; height: 1px; background: var(--rule); }
.muted { color: var(--ink-3); }
.small { font-size: 14px; }

/* ---------- header ---------- */
.site-head { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: saturate(1.2) blur(8px); border-bottom: 1px solid var(--rule); }
.site-head .wrap { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--serif); font-weight: 600; font-size: 19px; letter-spacing: -0.03em; }
.brand:hover { color: var(--ink); }
.brand svg { width: 26px; height: 26px; }
.nav { display: flex; gap: 22px; margin-left: auto; font-size: 15px; }
.nav a { text-decoration: none; color: var(--ink-2); padding: 6px 0; border-bottom: 1px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--ink); }
.head-cta { margin-left: 8px; }
.menu-btn { display: none; margin-left: auto; background: none; border: 1px solid var(--rule); color: var(--ink); font: 500 13px var(--mono); padding: 8px 12px; cursor: pointer; }
@media (max-width: 940px) {
  .nav { display: none; position: absolute; left: 0; right: 0; top: 64px; flex-direction: column; gap: 0; background: var(--paper); border-bottom: 1px solid var(--rule); padding: 8px var(--gut) 18px; }
  .nav a { padding: 12px 0; border-bottom: 1px solid var(--rule); font-size: 17px; }
  .site-head.open .nav { display: flex; }
  .menu-btn { display: block; }
  .site-head .head-cta { display: none; }
}

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 10px; font: 500 15px/1 var(--sans); padding: 14px 20px; border: 1px solid var(--ink); background: var(--ink); color: var(--paper); text-decoration: none; cursor: pointer; transition: transform .15s ease, background .15s ease; }
.btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn:active { transform: translateY(1px); }
.btn .arr { transition: transform .2s ease; }
.btn:hover .arr { transform: translateX(3px); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn.sm { padding: 10px 14px; font-size: 14px; }
.btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }

/* ---------- sections ---------- */
section { padding: clamp(64px, 9vw, 120px) 0; border-top: 1px solid var(--rule); }
section.flush { border-top: 0; }
.sec-head { display: grid; grid-template-columns: 220px 1fr; gap: 40px; margin-bottom: 56px; }
.sec-head .num { font: 500 12px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); padding-top: 14px; border-top: 1px solid var(--rule-strong); }
.sec-head .num b { color: var(--accent); font-weight: 500; }
.sec-head h2 { max-width: 18em; }
@media (max-width: 800px) { .sec-head { grid-template-columns: minmax(0, 1fr); gap: 16px; } .sec-head .num { padding-top: 10px; } }

/* ---------- hero ---------- */
.hero { padding: clamp(48px, 7vw, 96px) 0 clamp(56px, 7vw, 90px); border-top: 0; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); gap: clamp(32px, 5vw, 72px); align-items: end; }
@media (max-width: 1000px) { .hero-grid { grid-template-columns: minmax(0, 1fr); } }
.hero .lede { margin-top: 26px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px 22px; margin-top: 36px; font: 13px var(--mono); color: var(--ink-3); }
.hero-meta span::before { content: "■ "; color: var(--pass); font-size: 9px; vertical-align: 2px; }

/* eval report panel */
.report { background: var(--card); border: 1px solid var(--rule-strong); box-shadow: 10px 10px 0 var(--paper-2); font: 13px/1.5 var(--mono); }
.report-top { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--rule); color: var(--ink-3); gap: 12px; }
.report-top b { color: var(--ink); font-weight: 500; }
.chip { display: inline-block; padding: 2px 8px; border: 1px solid currentColor; font: 500 11px var(--mono); letter-spacing: .04em; text-transform: uppercase; white-space: nowrap; }
.chip.pass { color: var(--pass); } .chip.fail { color: var(--fail); } .chip.warn { color: var(--warn); } .chip.neutral { color: var(--ink-3); }
.report-rows { padding: 6px 0; }
.rrow { display: grid; grid-template-columns: 1fr 64px 120px 54px; gap: 12px; align-items: center; padding: 9px 16px; border-bottom: 1px dashed var(--rule); }
.rrow:last-child { border-bottom: 0; }
.rrow .name { color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rrow .n { color: var(--ink-3); text-align: right; }
.bar { height: 6px; background: var(--paper-2); position: relative; }
.bar i { position: absolute; inset: 0 auto 0 0; background: var(--pass); transform-origin: left; animation: grow 1.1s cubic-bezier(.2,.7,.2,1) both; }
.bar i.f { background: var(--fail); } .bar i.w { background: var(--warn); }
.rrow .s { text-align: right; color: var(--ink); }
.rrow .s.bad { color: var(--fail); }
@keyframes grow { from { transform: scaleX(0); } }
.report-foot { display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; border-top: 1px solid var(--rule-strong); background: var(--paper-2); gap: 10px; flex-wrap: wrap; }
.report-foot .gate { color: var(--fail); font-weight: 500; }
@media (max-width: 560px) { .rrow { grid-template-columns: 1fr 70px 46px; } .rrow .n { display: none; } }
@media (prefers-reduced-motion: reduce) { .bar i { animation: none; } html { scroll-behavior: auto; } }

/* ---------- logos / proof strip ---------- */
.proof { padding: 28px 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.proof .wrap { display: grid; grid-template-columns: 200px 1fr; gap: 28px; align-items: center; }
.proof-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; }
.proof-list div { padding: 4px 18px; border-left: 1px solid var(--rule); font-size: 14px; color: var(--ink-2); line-height: 1.35; }
.proof-list b { display: block; font: 500 11px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 4px; }
@media (max-width: 1000px) { .proof .wrap { grid-template-columns: minmax(0, 1fr); } .proof-list { grid-template-columns: repeat(2, 1fr); row-gap: 14px; } }

/* ---------- stat band ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--rule-strong); }
.stat { padding: 24px 24px 8px 0; border-right: 1px solid var(--rule); margin-right: 24px; }
.stat:last-child { border-right: 0; }
.stat .v { font: 300 clamp(40px, 4.6vw, 64px)/1 var(--serif); letter-spacing: -0.03em; }
.stat .v small { font-size: .45em; color: var(--ink-3); margin-left: 2px; }
.stat p { font-size: 14px; color: var(--ink-3); margin-top: 10px; max-width: 18em; }
@media (max-width: 800px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } .stat:nth-child(2) { border-right: 0; } }

/* ---------- product index (home) ---------- */
.pindex { border-top: 1px solid var(--rule-strong); }
.prow { display: grid; grid-template-columns: 80px 1.1fr 1.4fr 160px; gap: 28px; padding: 32px 0; border-bottom: 1px solid var(--rule); text-decoration: none; align-items: start; transition: background .2s ease; }
.prow:hover { color: var(--ink); background: linear-gradient(90deg, transparent, var(--paper-2) 30%, var(--paper-2) 70%, transparent); }
.prow .k { font: 500 13px var(--mono); color: var(--accent); padding-top: 8px; }
.prow h3 { margin: 0; }
.prow h3 span { display: block; font: 500 12px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 8px; }
.prow p { margin: 0; color: var(--ink-2); }
.prow .go { font: 500 14px var(--mono); text-align: right; padding-top: 8px; }
.prow:hover .go { color: var(--accent); }
@media (max-width: 860px) { .prow { grid-template-columns: minmax(0, 1fr); gap: 10px; } .prow .go { text-align: left; } }

/* ---------- generic grids ---------- */
.cols { display: grid; gap: clamp(24px, 3vw, 48px); }
.cols.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cols.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cols.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.cols.split { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); align-items: start; }
@media (max-width: 960px) { .cols.c3, .cols.c4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .cols.split { grid-template-columns: minmax(0, 1fr); } }
@media (max-width: 640px) { .cols.c2, .cols.c3, .cols.c4 { grid-template-columns: minmax(0, 1fr); } }

.note { border-top: 1px solid var(--rule-strong); padding-top: 18px; }
.note .k { font: 500 12px var(--mono); color: var(--accent); letter-spacing: .06em; display: block; margin-bottom: 14px; }
.note p { color: var(--ink-2); font-size: 16px; }

.panel { background: var(--card); border: 1px solid var(--rule); padding: clamp(20px, 3vw, 32px); }
.panel.dark { background: var(--code-bg); color: var(--code-ink); border-color: var(--code-bg); }

/* ---------- lists ---------- */
.ticks { list-style: none; padding: 0; margin: 0 0 1em; }
.ticks li { padding: 10px 0 10px 28px; border-bottom: 1px solid var(--rule); position: relative; font-size: 16px; }
.ticks li::before { content: ""; position: absolute; left: 2px; top: 19px; width: 12px; height: 7px; border-left: 1.5px solid var(--pass); border-bottom: 1.5px solid var(--pass); transform: rotate(-45deg); }
.dl { display: grid; grid-template-columns: 180px 1fr; border-top: 1px solid var(--rule-strong); }
.dl dt, .dl dd { padding: 16px 0; border-bottom: 1px solid var(--rule); margin: 0; }
.dl dt { font: 500 13px var(--mono); color: var(--ink-3); padding-right: 16px; }
@media (max-width: 640px) { .dl { grid-template-columns: minmax(0, 1fr); } .dl dt { border-bottom: 0; padding-bottom: 0; } }

/* ---------- code ---------- */
pre { margin: 0; background: var(--code-bg); color: var(--code-ink); padding: 22px 24px; overflow-x: auto; font: 13.5px/1.65 var(--mono); border-radius: 0; }
pre .c { color: #8a877e; } pre .k { color: #f08a5d; } pre .s { color: #b9d58c; } pre .n { color: #8fc1e3; }
code { font-size: .9em; background: var(--paper-2); padding: 1px 5px; }
pre code { background: none; padding: 0; font-size: inherit; }
.term-head { display: flex; justify-content: space-between; background: #24252a; color: #a9a69d; font: 12px var(--mono); padding: 8px 16px; }

/* ---------- table ---------- */
.table-wrap { overflow-x: auto; border-top: 1px solid var(--rule-strong); }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 620px; }
th, td { text-align: left; padding: 14px 16px 14px 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { font: 500 12px var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--ink-3); }
td.y { color: var(--pass); font-family: var(--mono); } td.x { color: var(--ink-3); font-family: var(--mono); }

/* ---------- pricing ---------- */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--rule-strong); }
.plan { padding: 32px 28px; border-right: 1px solid var(--rule); display: flex; flex-direction: column; }
.plan:last-child { border-right: 0; }
.plan.feat { background: #15161a; color: #ece8de; }
.plan.feat .muted, .plan.feat .ticks li { color: #c4c0b6; }
.plan.feat .ticks li { border-color: #ffffff22; }
.plan.feat .btn { background: var(--accent); border-color: var(--accent); color: #fff; }
.plan.feat .btn:hover { background: #ece8de; color: #15161a; border-color: #ece8de; }
.plan .price { font: 300 48px/1 var(--serif); letter-spacing: -0.03em; margin: 18px 0 6px; }
.plan .price small { font: 14px var(--sans); color: inherit; opacity: .7; letter-spacing: 0; }
.plan .ticks { margin: 22px 0 28px; flex: 1; }
@media (max-width: 960px) { .plans { grid-template-columns: minmax(0, 1fr); } .plan { border-right: 0; border-bottom: 1px solid var(--rule); } }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--rule-strong); }
.faq details { border-bottom: 1px solid var(--rule); }
.faq summary { list-style: none; cursor: pointer; padding: 22px 40px 22px 0; font: 500 clamp(19px, 1.8vw, 23px)/1.3 var(--serif); position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 18px; font: 300 26px var(--sans); color: var(--ink-3); transition: transform .2s ease; }
.faq details[open] summary::after { transform: rotate(45deg); color: var(--accent); }
.faq .a { padding: 0 0 22px; color: var(--ink-2); max-width: 46em; }

/* ---------- CTA band (fixed dark in both themes) ---------- */
.cta-band { background: #15161a; color: #ece8de; border-top: 0; }
.cta-band .wrap { display: grid; grid-template-columns: 1.3fr 1fr; gap: 48px; align-items: end; }
.cta-band h2 { color: #ece8de; margin: 0; }
.cta-band h2 em { color: #5cc195; }
.cta-band p { color: #b5b1a7; }
.cta-band .eyebrow { color: #8d8a83; } .cta-band .eyebrow::after { background: #3a3b40; }
.cta-band .btn { background: #ece8de; color: #15161a; border-color: #ece8de; }
.cta-band .btn:hover { background: #5cc195; border-color: #5cc195; color: #0d1f17; }
.cta-band .btn.ghost { background: transparent; color: #ece8de; border-color: #ffffff55; }
@media (max-width: 860px) { .cta-band .wrap { grid-template-columns: minmax(0, 1fr); } }

/* ---------- footer ---------- */
.site-foot { border-top: 1px solid var(--rule-strong); padding: 56px 0 40px; font-size: 14px; }
.foot-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 32px; }
.foot-grid h4 { font: 500 12px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 14px; }
.foot-grid ul { list-style: none; padding: 0; margin: 0; }
.foot-grid li { margin: 0 0 9px; }
.foot-grid a { text-decoration: none; color: var(--ink-2); }
.foot-grid a:hover { color: var(--accent); }
.foot-base { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--rule); color: var(--ink-3); font: 12px var(--mono); }
.theme-toggle { background: none; border: 1px solid var(--rule); color: var(--ink-2); font: 12px var(--mono); padding: 5px 10px; cursor: pointer; }
@media (max-width: 860px) { .foot-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } .foot-grid > div:first-child { grid-column: 1 / -1; } }

/* ---------- breadcrumbs / page head ---------- */
.crumbs { font: 12px var(--mono); color: var(--ink-3); padding-top: 28px; }
.crumbs a { text-decoration: none; color: var(--ink-3); }
.crumbs a:hover { color: var(--accent); }
.crumbs span { margin: 0 8px; }
.page-head { padding: clamp(36px, 6vw, 80px) 0 clamp(40px, 5vw, 64px); border-top: 0; }
.page-head h1 { max-width: 15em; }
.page-head .lede { margin-top: 22px; }

/* ---------- article (guides) ---------- */
.article { display: grid; grid-template-columns: 220px minmax(0, 720px); gap: clamp(28px, 5vw, 80px); padding-top: 24px; padding-bottom: 96px; }
.toc { position: sticky; top: 88px; align-self: start; font-size: 14px; }
.toc h4 { font: 500 12px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
.toc ol { list-style: none; padding: 0; margin: 0; counter-reset: t; border-top: 1px solid var(--rule-strong); }
.toc li { counter-increment: t; border-bottom: 1px solid var(--rule); }
.toc a { display: block; padding: 9px 0; text-decoration: none; color: var(--ink-2); }
.toc a::before { content: counter(t, decimal-leading-zero) "  "; font: 11px var(--mono); color: var(--ink-3); }
.prose { font-size: 18px; line-height: 1.7; }
.prose h2 { font-size: clamp(28px, 3vw, 38px); margin: 1.8em 0 .5em; scroll-margin-top: 90px; }
.prose h3 { font-size: 23px; margin: 1.6em 0 .4em; }
.prose p, .prose li { color: var(--ink-2); }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose li { margin-bottom: .45em; }
.prose blockquote { margin: 1.6em 0; padding: 4px 0 4px 22px; border-left: 2px solid var(--accent); font: italic 22px/1.45 var(--italic); color: var(--ink); }
.prose pre { margin: 1.4em 0; font-size: 13.5px; }
.prose .table-wrap { margin: 1.6em 0; }
.prose table { font-size: 15px; }
.byline { display: flex; gap: 18px; flex-wrap: wrap; font: 12px var(--mono); color: var(--ink-3); margin-top: 22px; }
.callout { background: var(--paper-2); border-left: 3px solid var(--ink); padding: 18px 22px; margin: 1.6em 0; font-size: 16px; }
.callout b { font-family: var(--mono); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; display: block; margin-bottom: 6px; color: var(--accent); font-weight: 500; }
@media (max-width: 960px) { .article { grid-template-columns: minmax(0, 1fr); } .toc { position: static; } }

/* ---------- forms ---------- */
.form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 20px; }
.form .full { grid-column: 1 / -1; }
.field label { display: block; font: 500 12px var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 8px; }
.field input, .field select, .field textarea {
  width: 100%; font: 16px/1.4 var(--sans); color: var(--ink); background: var(--card);
  border: 1px solid var(--rule); border-bottom: 1.5px solid var(--ink-3); padding: 12px 14px; border-radius: 0; appearance: none;
  transition: border-color .15s ease, background .15s ease;
}
.field select { background-image: linear-gradient(45deg, transparent 50%, var(--ink-3) 50%), linear-gradient(135deg, var(--ink-3) 50%, transparent 50%); background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 36px; }
.field textarea { min-height: 150px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-bottom-color: var(--accent); background: var(--paper); }
.hp { position: absolute !important; left: -10000px !important; width: 1px; height: 1px; overflow: hidden; }
.form-status { grid-column: 1 / -1; font-size: 15px; min-height: 1.5em; }
.form-status.ok { color: var(--pass); } .form-status.err { color: var(--fail); }
.form.sent .field, .form.sent .form-actions { opacity: .45; pointer-events: none; }
.form-actions { grid-column: 1 / -1; display: flex; gap: 18px; align-items: center; flex-wrap: wrap; }
.form-actions .small { color: var(--ink-3); }
@media (max-width: 640px) { .form { grid-template-columns: minmax(0, 1fr); } }

/* ---------- diagrams ---------- */
.diagram { border: 1px solid var(--rule); background: var(--card); padding: clamp(16px, 2.5vw, 28px); }
.diagram svg { width: 100%; height: auto; }
.diagram svg text { font-family: var(--mono); font-size: 12px; fill: var(--ink-2); }
.diagram svg .t-strong { fill: var(--ink); font-weight: 500; }
.diagram svg .t-acc { fill: var(--accent); }
.diagram svg .ln { stroke: var(--ink-3); stroke-width: 1; fill: none; }
.diagram svg .ln-acc { stroke: var(--accent); stroke-width: 1.5; fill: none; }
.diagram svg .box { fill: var(--paper); stroke: var(--ink); stroke-width: 1; }
.diagram svg .box-acc { fill: var(--accent); stroke: var(--accent); }
.diagram svg .box-mute { fill: var(--paper-2); stroke: var(--rule); }
.diagram figcaption, figure figcaption { font: 12px var(--mono); color: var(--ink-3); margin-top: 14px; }
figure { margin: 0; }
.dash-anim { stroke-dasharray: 4 5; animation: dash 1.4s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -18; } }
@media (prefers-reduced-motion: reduce) { .dash-anim { animation: none; } }

/* ---------- playground (guard) ---------- */
.play { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border: 1px solid var(--rule-strong); background: var(--card); }
.play-in { padding: 22px; border-right: 1px solid var(--rule); }
.play-out { padding: 22px; font: 13px/1.6 var(--mono); }
.play textarea { width: 100%; min-height: 150px; font: 14px/1.5 var(--mono); padding: 12px; background: var(--paper); color: var(--ink); border: 1px solid var(--rule); resize: vertical; }
.presets { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.presets button { font: 12px var(--mono); padding: 6px 10px; background: transparent; color: var(--ink-2); border: 1px solid var(--rule); cursor: pointer; }
.presets button:hover { border-color: var(--ink); color: var(--ink); }
.verdict { font: 500 28px/1.1 var(--serif); letter-spacing: -0.02em; margin: 6px 0 16px; }
.verdict.block { color: var(--fail); } .verdict.allow { color: var(--pass); } .verdict.review { color: var(--warn); }
.sig { display: grid; grid-template-columns: 1fr 60px; gap: 10px; padding: 7px 0; border-bottom: 1px dashed var(--rule); }
.sig span:last-child { text-align: right; }
@media (max-width: 800px) { .play { grid-template-columns: minmax(0, 1fr); } .play-in { border-right: 0; border-bottom: 1px solid var(--rule); } }

/* ---------- misc ---------- */
.kicker-list { counter-reset: k; list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--rule-strong); }
.kicker-list li { counter-increment: k; display: grid; grid-template-columns: 56px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--rule); }
.kicker-list li::before { content: counter(k, decimal-leading-zero); font: 500 13px var(--mono); color: var(--accent); padding-top: 4px; }
.kicker-list h4 { font: 500 21px/1.25 var(--serif); letter-spacing: -0.015em; margin: 0 0 6px; }
.kicker-list p { margin: 0; color: var(--ink-2); font-size: 16px; }
.quote { font: 400 clamp(24px, 2.8vw, 38px)/1.3 var(--italic); font-style: italic; letter-spacing: -0.015em; max-width: 26em; }
.quote cite { display: block; font: 13px var(--mono); color: var(--ink-3); margin-top: 22px; font-style: normal; }
.tagrow { display: flex; flex-wrap: wrap; gap: 8px; }
.tag { font-size: 12px; padding: 4px 9px; border: 1px solid var(--rule); color: var(--ink-2); }
.guide-list { border-top: 1px solid var(--rule-strong); }
.guide-list a { display: grid; grid-template-columns: 1fr 140px; gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--rule); text-decoration: none; }
.guide-list a:hover { color: var(--ink); }
.guide-list a:hover h3 { color: var(--accent); }
.guide-list h3 { margin: 0 0 6px; font-size: 24px; transition: color .15s ease; }
.guide-list p { margin: 0; color: var(--ink-2); font-size: 15px; }
.guide-list .meta { font: 12px var(--mono); color: var(--ink-3); text-align: right; padding-top: 6px; }
@media (max-width: 640px) { .guide-list a { grid-template-columns: minmax(0, 1fr); gap: 6px; } .guide-list .meta { text-align: left; } }
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .js .reveal { opacity: 1; transform: none; transition: none; } }
.center { text-align: center; }
.mt0 { margin-top: 0; } .mt1 { margin-top: 12px; } .mt2 { margin-top: 28px; } .mt3 { margin-top: 48px; }