:root {
  --ink: #1a1a1a;
  --muted: #6b6b6b;
  --line: #e3e1dc;
  --paper: #fbfaf8;
  --panel: #ffffff;
  --accent: #8a1c1c;      /* deep rust — Rails-ish without the cliché red */
  --accent-soft: #f3e9e7;
  --ok: #1f6b3b;
  --ok-soft: #e7f1ea;
  --warn: #8a6d1c;
  --warn-soft: #f5efdd;
  --radius: 4px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: ui-serif, Georgia, "Times New Roman", serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
  font-size: 16px;
}

h1, h2, h3, h4, nav, th, label, .ui { font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }

h1 { font-size: 1.6rem; margin: 0 0 .2rem; letter-spacing: -0.01em; }
h2 { font-size: 1.15rem; margin: 1.8rem 0 .6rem; }
h3 { font-size: .95rem; margin: 0 0 .4rem; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
p { margin: .4rem 0; }

/* Layout shell */
.app { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px; flex: 0 0 220px; background: var(--panel);
  border-right: 1px solid var(--line); padding: 1.4rem 1rem;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.brand { font-family: ui-sans-serif, system-ui, sans-serif; font-weight: 700; letter-spacing: .14em; font-size: .8rem; text-transform: uppercase; color: var(--ink); display:block; margin-bottom: .15rem; }
.brand .mark { color: var(--accent); }
.role-tag { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .68rem; text-transform: uppercase; letter-spacing: .1em; color: var(--muted); margin-bottom: 1.6rem; display:block; }
.nav a { display: block; padding: .4rem .55rem; border-radius: var(--radius); color: var(--ink); font-family: ui-sans-serif, system-ui, sans-serif; font-size: .88rem; margin-bottom: .1rem; }
.nav a:hover { background: var(--paper); text-decoration: none; }
.nav a.active { background: var(--accent-soft); color: var(--accent); }
.nav .sep { height: 1px; background: var(--line); margin: .9rem .3rem; }

.main { flex: 1; min-width: 0; }
.topbar { display:flex; align-items:center; justify-content: space-between; padding: .8rem 2rem; border-bottom: 1px solid var(--line); background: var(--panel); }
.topbar .who { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .82rem; color: var(--muted); }
.content { padding: 2rem; max-width: 1080px; }

/* Panels & cards */
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem 1.3rem; margin-bottom: 1.2rem; }
.grid { display: grid; gap: 1rem; }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 760px){ .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; } .sidebar{display:none;} }

.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; }
.stat .n { font-family: ui-sans-serif, system-ui, sans-serif; font-size: 1.8rem; font-weight: 600; letter-spacing: -.02em; }
.stat .l { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }

/* Tables */
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th { text-align: left; font-size: .7rem; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); padding: .5rem .6rem; border-bottom: 1px solid var(--line); font-weight: 600; }
td { padding: .6rem; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
.num { text-align: right; font-variant-numeric: tabular-nums; }

/* Badges */
.badge { font-family: ui-sans-serif, system-ui, sans-serif; display:inline-block; font-size: .68rem; text-transform: uppercase; letter-spacing: .05em; padding: .12rem .45rem; border-radius: 100px; background: #eee; color: #444; }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.accent { background: var(--accent-soft); color: var(--accent); }

/* Overlap dial */
.overlap { font-family: ui-sans-serif, system-ui, sans-serif; display:inline-flex; align-items:baseline; gap:.3rem; }
.overlap b { font-size: 1.5rem; font-weight: 600; color: var(--accent); }
.overlap span { font-size: .72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }

/* Forms */
.field { margin-bottom: 1rem; }
label { display:block; font-size: .76rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin-bottom: .3rem; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=date], input[type=url], select, textarea {
  width: 100%; padding: .55rem .6rem; border: 1px solid var(--line); border-radius: var(--radius);
  font-family: ui-sans-serif, system-ui, sans-serif; font-size: .92rem; background: #fff; color: var(--ink);
}
textarea { min-height: 90px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.hint { font-size: .76rem; color: var(--muted); margin-top: .25rem; }

/* Buttons */
.btn { font-family: ui-sans-serif, system-ui, sans-serif; display:inline-block; cursor:pointer; font-size: .85rem; padding: .5rem .9rem; border-radius: var(--radius); border: 1px solid var(--accent); background: var(--accent); color: #fff; text-decoration: none; }
.btn:hover { background: #6f1616; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn.ghost:hover { background: var(--accent-soft); }
.btn.subtle { background: #fff; color: var(--ink); border-color: var(--line); }
.btn.subtle:hover { background: var(--paper); }
.btn.sm { font-size: .76rem; padding: .32rem .6rem; }

/* Flash */
.flash { padding: .7rem 1rem; border-radius: var(--radius); margin: 1rem 2rem 0; font-family: ui-sans-serif, system-ui, sans-serif; font-size: .88rem; }
.flash.notice { background: var(--ok-soft); color: var(--ok); }
.flash.alert { background: var(--accent-soft); color: var(--accent); }

.muted { color: var(--muted); }
.row { display:flex; align-items:center; justify-content: space-between; gap: 1rem; }
.row.wrap { flex-wrap: wrap; }
.stack > * + * { margin-top: .5rem; }
.divider { height:1px; background: var(--line); margin: 1.2rem 0; }
.kv { display:grid; grid-template-columns: 150px 1fr; gap:.4rem .8rem; font-size:.9rem; }
.kv dt { color: var(--muted); font-family: ui-sans-serif, system-ui, sans-serif; font-size:.8rem; }
.kv dd { margin:0; }
.tag-list { display:flex; flex-wrap:wrap; gap:.3rem; }
.errors { background: var(--accent-soft); color: var(--accent); padding:.7rem 1rem; border-radius: var(--radius); font-size:.85rem; margin-bottom:1rem; }
.errors ul { margin:.3rem 0 0; padding-left: 1.1rem; }

/* ============================ Marketing site ============================ */
.mkt { font-size: 17px; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 1.5rem; }
.container.narrow { max-width: 760px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(251,250,248,.9); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.site-header .bar { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.site-nav { display: flex; align-items: center; gap: 1.3rem; }
.site-nav a { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .9rem; color: var(--ink); }
.site-nav a:hover { color: var(--accent); text-decoration: none; }
.site-nav .cta { color:#fff; }
@media (max-width: 740px){ .site-nav .hide-sm { display:none; } }

/* Hero */
.hero { padding: 5rem 0 3.5rem; }
.eyebrow { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .76rem; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); line-height: 1.08; letter-spacing: -.02em; margin: 1rem 0; max-width: 16ch; }
.lede { font-size: 1.2rem; color: var(--muted); max-width: 56ch; line-height: 1.55; }
.cta-row { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 2rem; }
.btn.lg { font-size: 1rem; padding: .75rem 1.3rem; }

/* Sections */
section.band { padding: 4rem 0; border-top: 1px solid var(--line); }
section.band.alt { background: var(--panel); }
.section-head { max-width: 60ch; margin-bottom: 2.2rem; }
.section-head h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); letter-spacing: -.01em; margin: .3rem 0 .6rem; }
.section-head p { font-size: 1.08rem; color: var(--muted); }

/* Feature grid */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem 2rem; }
.features .f h3 { font-size: 1.05rem; margin-bottom: .35rem; }
.features .f p { color: var(--muted); font-size: .98rem; }
.features .f .ic { width: 34px; height: 3px; background: var(--accent); border-radius: 2px; margin-bottom: .9rem; }
@media (max-width: 740px){ .features { grid-template-columns: 1fr; } }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; counter-reset: step; }
.steps .s { }
.steps .s .n { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .8rem; font-weight: 700; color: var(--accent); letter-spacing: .1em; }
.steps .s h3 { font-size: 1.02rem; margin: .4rem 0; }
.steps .s p { color: var(--muted); font-size: .95rem; }
@media (max-width: 740px){ .steps { grid-template-columns: 1fr; } }

/* Stat band */
.statband { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; text-align: center; }
.statband .b { }
.statband .b b { display:block; font-family: ui-sans-serif, system-ui, sans-serif; font-size: 2.4rem; letter-spacing: -.02em; color: var(--ink); }
.statband .b span { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .82rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
@media (max-width: 740px){ .statband { grid-template-columns: 1fr 1fr; gap: 2rem 1rem; } }

/* Comparison */
.compare { width:100%; border-collapse: collapse; font-size: .98rem; }
.compare th, .compare td { padding: .85rem 1rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.compare thead th { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.compare td.yes { color: var(--ok); }
.compare td.no { color: var(--muted); }
.compare .us { background: var(--accent-soft); }

/* Prose */
.prose { max-width: 68ch; }
.prose h2 { margin-top: 2.2rem; }
.prose p, .prose li { font-size: 1.06rem; color: #2a2a2a; line-height: 1.65; }
.prose ul { padding-left: 1.2rem; }
.prose li { margin: .3rem 0; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--line); padding: 1rem 0; }
.faq-item summary { font-family: ui-sans-serif, system-ui, sans-serif; font-size: 1.05rem; cursor: pointer; list-style: none; display:flex; justify-content: space-between; gap:1rem; }
.faq-item summary::-webkit-details-marker { display:none; }
.faq-item summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; line-height: 1; }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { color: var(--muted); margin-top: .7rem; max-width: 70ch; }

/* CTA strip */
.ctastrip { background: var(--ink); color: #f5f3ef; border-radius: var(--radius); padding: 2.5rem; text-align: center; }
.ctastrip h2 { color: #fff; margin: 0 0 .5rem; }
.ctastrip p { color: #c9c4bd; margin-bottom: 1.4rem; }
.ctastrip .btn.subtle { background: transparent; color:#fff; border-color: #555; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); background: var(--panel); padding: 3rem 0 2rem; margin-top: 2rem; }
.footer-grid { display:grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; }
.footer-grid h4 { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin: 0 0 .8rem; }
.footer-grid a { display:block; font-family: ui-sans-serif, system-ui, sans-serif; font-size: .92rem; color: var(--ink); padding: .2rem 0; }
.footer-grid a:hover { color: var(--accent); text-decoration:none; }
.footer-bottom { margin-top: 2.5rem; padding-top: 1.2rem; border-top: 1px solid var(--line); font-family: ui-sans-serif, system-ui, sans-serif; font-size: .82rem; color: var(--muted); display:flex; justify-content: space-between; flex-wrap: wrap; gap:.5rem; }
@media (max-width: 740px){ .footer-grid { grid-template-columns: 1fr; } }

/* ============================ Blog: index ============================ */
.post-list { max-width: 680px; margin: 0 auto; }
.post-card { padding: 2.2rem 0; border-bottom: 1px solid var(--line); }
.post-card:first-child { padding-top: .5rem; }
.post-card .eyebrow { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.post-card h2 { font-size: 1.7rem; line-height: 1.2; letter-spacing: -.015em; margin: .5rem 0 .5rem; }
.post-card h2 a { color: var(--ink); }
.post-card h2 a:hover { color: var(--accent); text-decoration: none; }
.post-dek { color: var(--muted); font-size: 1.08rem; line-height: 1.55; margin: 0 0 .7rem; }
.post-meta { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .82rem; color: var(--muted); letter-spacing: .02em; }

/* ============================ Blog: reading page ============================ */
.reading-progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; background: var(--accent); z-index: 60; transition: width .08s linear; }

.article { max-width: 680px; margin: 0 auto; padding: 3.5rem 1.5rem 4.5rem; }
.article-head { margin-bottom: 2rem; }
.article-head .eyebrow { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .74rem; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.article-head h1 { font-size: clamp(2rem, 4.6vw, 2.9rem); line-height: 1.12; letter-spacing: -.02em; margin: .9rem 0 1.1rem; max-width: 20ch; }
.article-meta { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .88rem; color: var(--muted); display: flex; align-items: center; gap: .55rem; flex-wrap: wrap; }
.article-meta .dot { opacity: .5; }
.article-cover { width: 100%; border-radius: var(--radius); border: 1px solid var(--line); margin: 0 0 2.5rem; }

/* Body: the readability core — larger serif, generous leading, narrow measure. */
.prose-article { font-family: ui-serif, Georgia, "Times New Roman", serif; font-size: 1.24rem; line-height: 1.75; color: #2b2724; }
.prose-article > * + * { margin-top: 1.55rem; }
/* Lede: first paragraph reads a touch larger and darker. */
.prose-article > p:first-of-type { font-size: 1.4rem; line-height: 1.55; color: var(--ink); }
.prose-article p { overflow-wrap: break-word; }
.prose-article a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: rgba(138,28,28,.4); }
.prose-article a:hover { text-decoration-color: var(--accent); }
.prose-article strong { font-weight: 700; color: var(--ink); }
.prose-article em { font-style: italic; }

/* Headings: sans, strong, extra space above to group sections (whitespace = structure). */
.prose-article h2 { font-family: ui-sans-serif, system-ui, sans-serif; font-size: 1.65rem; line-height: 1.22; letter-spacing: -.01em; margin: 3.2rem 0 .1rem; }
.prose-article h3 { font-family: ui-sans-serif, system-ui, sans-serif; font-size: 1.22rem; line-height: 1.3; margin: 2.4rem 0 .1rem; }
.prose-article h2 + p, .prose-article h3 + p { margin-top: .8rem; }

.prose-article ul, .prose-article ol { padding-left: 1.4rem; }
.prose-article li { margin: .55rem 0; padding-left: .2rem; }
.prose-article li::marker { color: var(--accent); }

.prose-article blockquote { margin: 2.4rem 0; padding: .1rem 0 .1rem 1.5rem; border-left: 3px solid var(--accent); font-size: 1.4rem; line-height: 1.5; font-style: italic; color: var(--ink); }
.prose-article blockquote p { margin: 0; }

.prose-article img { width: 100%; border-radius: var(--radius); border: 1px solid var(--line); }
.prose-article figure { margin: 2.4rem 0; }
.prose-article figcaption { font-family: ui-sans-serif, system-ui, sans-serif; font-size: .84rem; color: var(--muted); text-align: center; margin-top: .6rem; }

/* Section break: quiet centered rule instead of a hard line. */
.prose-article hr { border: 0; height: 1.6rem; margin: 2.5rem 0; background: none; text-align: center; }
.prose-article hr::before { content: "· · ·"; color: var(--muted); letter-spacing: .5em; }

.prose-article table { width: 100%; border-collapse: collapse; font-size: 1rem; font-family: ui-sans-serif, system-ui, sans-serif; }
.prose-article th, .prose-article td { text-align: left; padding: .6rem .7rem; border-bottom: 1px solid var(--line); }

/* Inline code + code blocks. */
.prose-article code { font-family: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas, monospace; font-size: .86em; background: #efe9e2; padding: .12em .4em; border-radius: 4px; }
.prose-article .highlight { margin: 2rem 0; background: #f7f3ee; border: 1px solid var(--line); border-radius: 6px; overflow-x: auto; }
.prose-article .highlight pre { margin: 0; padding: 1.05rem 1.25rem; }
.prose-article .highlight code { font-size: .95rem; line-height: 1.65; background: none; padding: 0; border-radius: 0; }

.article-foot { margin-top: 3.5rem; }
.article-foot .rule { height: 1px; background: var(--line); margin-bottom: 1.6rem; }
.article-foot .cta-row { margin-top: 1.4rem; }

@media (max-width: 640px) {
  .prose-article { font-size: 1.15rem; }
  .prose-article > p:first-of-type { font-size: 1.28rem; }
  .article { padding-top: 2.5rem; }
}

/* ============================ Rouge (light) syntax theme ============================ */
.highlight .c, .highlight .cm, .highlight .c1, .highlight .cs, .highlight .cd { color: #8a938c; font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kv { color: #a626a4; }
.highlight .kc, .highlight .kt { color: #b8860b; }
.highlight .o, .highlight .ow { color: #4078f2; }
.highlight .p, .highlight .n { color: #383a42; }
.highlight .nf, .highlight .fm { color: #4078f2; }
.highlight .nc, .highlight .nn, .highlight .no, .highlight .nl { color: #c18401; }
.highlight .nb, .highlight .bp { color: #0184bc; }
.highlight .na { color: #986801; }
.highlight .nt { color: #e45649; }
.highlight .nv, .highlight .vi, .highlight .vg, .highlight .vc, .highlight .nx { color: #986801; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .se, .highlight .sh, .highlight .si, .highlight .sx, .highlight .sr, .highlight .ss, .highlight .dl { color: #50a14f; }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo, .highlight .il { color: #986801; }
.highlight .gd { color: #e45649; background: #ffeef0; }
.highlight .gi { color: #50a14f; background: #f0fff4; }
.highlight .gh, .highlight .gu { color: #4078f2; font-weight: 600; }
.highlight .err { color: #e45649; }