:root {
  --ink: #15251f;
  --muted: #5d6c65;
  --paper: #f4f1e9;
  --cream: #faf8f2;
  --line: #d8d8cb;
  --mint: #c9f3d8;
  --lime: #b7dc43;
  --orange: #f06e3d;
  --orange-ink: #ad4f2c;
  --serif: Georgia, 'Times New Roman', serif;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, sans-serif;
  --space-1: .5rem; --space-2: .75rem; --space-3: 1rem; --space-4: 1.5rem; --space-5: 2rem; --space-6: 3rem; --space-7: 5rem; --space-8: 7rem;
  --duration-fast: 140ms; --duration-base: 220ms; --ease-out: cubic-bezier(.2, .8, .2, 1);
  --radius-pill: 999px; --radius-card: 1rem; --shadow-card: 0 1.25rem 3rem rgba(21, 37, 31, .08); --shadow-hover: 0 1.5rem 3.5rem rgba(21, 37, 31, .14);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.55; }
a { color: inherit; } a, .button { transition: color var(--duration-fast) var(--ease-out), background-color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out), transform var(--duration-base) var(--ease-out), box-shadow var(--duration-base) var(--ease-out); }
.skip-link { position: absolute; left: -999px; padding: .7rem 1rem; background: var(--ink); color: white; z-index: 2; }
.skip-link:focus { left: 1rem; top: 1rem; }
.site-header, .site-footer { max-width: 1200px; margin: auto; padding: 1.7rem 3rem; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.site-header { border-bottom: 1px solid var(--line); }
.brand { font-weight: 750; text-decoration: none; letter-spacing: -.03em; }
.brand span, .site-footer .brand:first-letter { color: var(--orange); }
nav, .footer-links { display: flex; align-items: center; gap: 1.5rem; font-size: .8rem; font-weight: 650; }
nav a, .footer-links a { text-decoration: none; }
nav a:hover, .footer-links a:hover, article a:hover { text-decoration: underline; text-underline-offset: .25em; }
.nav-cta, .button-primary { background: var(--ink); color: var(--cream); border-radius: 999px; }
.nav-cta { padding: .65rem 1.05rem; }
.hero { max-width: 1200px; margin: auto; padding: 9rem 3rem 8rem; background: radial-gradient(circle at 70% 20%, var(--mint), transparent 29%); }
.eyebrow { color: var(--orange-ink); text-transform: uppercase; letter-spacing: .15em; font-size: .68rem; font-weight: 800; margin: 0 0 1.25rem; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { letter-spacing: -.065em; line-height: 1.02; }
h1 { font-size: clamp(2.75rem, 6.5vw, 5rem); max-width: 920px; margin-bottom: 2rem; }
h1 em, h2 em { font-family: var(--serif); font-weight: 400; }
.lede { color: var(--muted); font-size: 1.25rem; max-width: 34rem; }
.product-visual { margin: 3rem 0 0; max-width: 760px; }.product-visual img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: var(--radius-card); box-shadow: var(--shadow-card); }.product-visual figcaption { color: var(--muted); font-size: .8rem; margin-top: .7rem; }
.actions { display: flex; flex-wrap: wrap; gap: .8rem; margin: 2.5rem 0 2rem; }
.button { display: inline-flex; gap: .8rem; align-items: center; text-decoration: none; font-size: .85rem; font-weight: 750; padding: 1rem 1.3rem; }
.button:hover { transform: translateY(-2px); }
.button-quiet { border: 1px solid var(--ink); border-radius: 999px; }
.hero-note { display: flex; align-items: center; gap: .65rem; color: var(--muted); font-size: .8rem; }
.status-dot { width: .55rem; height: .55rem; background: var(--lime); border-radius: 50%; }
.section { max-width: 1200px; margin: auto; padding: 7rem 3rem; }
.section-heading h2, .closing h2 { font-size: clamp(2rem, 4.5vw, 3.25rem); margin-bottom: 3rem; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); }
.feature-card { padding: 2.2rem 2rem 2.5rem 0; border-bottom: 1px solid var(--line); min-height: 18rem; transition: background-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out); } .feature-card:hover, .feature-card:focus-within { background: var(--cream); box-shadow: var(--shadow-card); } .feature-card:hover .feature-icon, .feature-card:focus-within .feature-icon { transform: translateY(-2px); } .feature-card:active { transform: translateY(1px); }
.feature-card:nth-child(odd) { border-right: 1px solid var(--line); padding-right: 3rem; }
.feature-card:nth-child(even) { padding-left: 3rem; }
.feature-card-accent { background: var(--mint); padding-left: 2rem !important; }
.feature-icon { display: block; width: 3.25rem; height: 3.25rem; margin-top: 1.2rem; transition: transform var(--duration-base) var(--ease-out); }
.feature-card h3 { font-size: 1.4rem; margin: 2.8rem 0 .8rem; letter-spacing: -.03em; }
.feature-card p { color: var(--muted); max-width: 25rem; }
.feature-card a { font-size: .8rem; font-weight: 750; text-decoration: none; }
.closing { text-align: center; padding-top: 9rem; padding-bottom: 9rem; }.closing h2 { margin-bottom: 2rem; }
.site-footer { border-top: 1px solid var(--line); align-items: flex-start; flex-wrap: wrap; color: var(--muted); font-size: .8rem; }.site-footer .brand { color: var(--ink); }.site-footer p { margin: .6rem 0 0; }.license { max-width: 20rem; margin-left: auto !important; }
@media (max-width: 700px) { .site-header, .site-footer, .hero, .section { padding-left: 1.3rem; padding-right: 1.3rem; } nav a:not(.nav-cta) { display: none; } .hero { padding-top: 6rem; padding-bottom: 5rem; } .feature-grid { grid-template-columns: 1fr; }.feature-card, .feature-card:nth-child(even), .feature-card:nth-child(odd), .feature-card-accent { border-right: 0; padding: 1.8rem 0 !important; min-height: auto; }.footer-links { order: 3; width: 100%; }.license { margin-left: 0 !important; } }
.deep-dive .section-heading h2 { margin-bottom: 2rem; }
.tabs { display: flex; flex-wrap: wrap; gap: .6rem; border-bottom: 1px solid var(--line); padding-bottom: 1rem; margin-bottom: 2rem; }
.tab { font: inherit; font-size: .8rem; font-weight: 750; color: var(--muted); background: transparent; border: 1px solid var(--line); border-radius: var(--radius-pill); padding: .65rem 1.1rem; cursor: pointer; }
.tab:hover { color: var(--ink); border-color: var(--ink); }
.tab[aria-selected="true"] { color: var(--cream); background: var(--ink); border-color: var(--ink); }
.tabpanel { background: var(--cream); border: 1px solid var(--line); border-radius: var(--radius-card); box-shadow: var(--shadow-card); padding: 2rem; max-width: 46rem; }
.tabpanel h3 { font-size: 1.4rem; margin: 0 0 .8rem; letter-spacing: -.03em; }
.tabpanel p { color: var(--muted); max-width: 34rem; }
.tabpanel pre { background: var(--paper); border: 1px solid var(--line); border-radius: .6rem; padding: 1.2rem 1.4rem; overflow-x: auto; font-size: .85rem; line-height: 1.6; }
.tabpanel pre code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.tabpanel a { font-size: .8rem; font-weight: 750; text-decoration: none; }
.tabpanel a:hover { text-decoration: underline; text-underline-offset: .25em; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; } }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 4px; } .button:focus-visible, .nav-cta:focus-visible { box-shadow: 0 0 0 4px var(--paper), 0 0 0 7px var(--orange); } .button[aria-disabled="true"], .button:disabled { cursor: not-allowed; opacity: .5; pointer-events: none; }
.tier-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); }
.tier-card { padding: 2.2rem 2rem 2.5rem 0; border-bottom: 1px solid var(--line); transition: background-color var(--duration-fast) var(--ease-out), box-shadow var(--duration-base) var(--ease-out), transform var(--duration-base) var(--ease-out); }
.tier-card:hover, .tier-card:focus-within { background: var(--cream); box-shadow: var(--shadow-card); }
.tier-card:first-child { border-right: 1px solid var(--line); padding-right: 3rem; }
.tier-card:last-child { padding-left: 3rem; }
.tier-card-accent { background: var(--mint); padding-left: 2rem !important; }
.tier-name { color: var(--orange-ink); text-transform: uppercase; letter-spacing: .15em; font-size: .68rem; font-weight: 800; margin: 0 0 1rem; }
.beta-tag { display: inline-block; background: var(--ink); color: var(--cream); border-radius: var(--radius-pill); padding: .15rem .7rem; letter-spacing: .1em; margin-left: .5rem; }
.tier-price { font-size: clamp(2.2rem, 4vw, 3.2rem); letter-spacing: -.05em; line-height: 1; margin: 0 0 .25rem; font-weight: 750; }
.tier-per { color: var(--muted); font-size: .875rem; margin: 0 0 1.25rem; }
.tier-card p { color: var(--muted); max-width: 25rem; }
.tier-card .tier-price { color: var(--ink); }
.tier-list { list-style: none; padding: 0; margin: 1.5rem 0; color: var(--ink); font-size: .875rem; }
.tier-list li { padding: .5rem 0 .5rem 1.4rem; position: relative; border-top: 1px solid var(--line); }
.tier-list li::before { content: "✦"; color: var(--orange); position: absolute; left: 0; }
.seat-note, .license-note { font-size: .8rem; color: var(--muted); max-width: 26rem; margin-top: 1.25rem; }
.included-copy { color: var(--muted); max-width: 40rem; font-size: 1.05rem; }
.honesty-list { list-style: none; padding: 0; margin: 0 0 2rem; max-width: 42rem; }
.honesty-list li { padding: 1rem 0 1rem 1.6rem; position: relative; border-top: 1px solid var(--line); color: var(--muted); }
.honesty-list li::before { content: "—"; color: var(--orange); position: absolute; left: 0; }
@media (max-width: 700px) { .tier-grid { grid-template-columns: 1fr; } .tier-card:first-child, .tier-card:last-child, .tier-card-accent { border-right: 0; padding: 1.8rem 0 !important; } }

/* Feature pages (additive): index + per-feature articles, same tokens. */
.feature-hero { padding-bottom: 4rem; }
.breadcrumb { color: var(--muted); font-size: .8rem; margin: 0 0 1.5rem; }
.breadcrumb a { text-decoration: none; font-weight: 650; }
.breadcrumb a:hover { text-decoration: underline; text-underline-offset: .25em; }
.tool-list { list-style: none; margin: 0 0 3rem; padding: 0; border-top: 1px solid var(--line); }
.tool-row { display: grid; grid-template-columns: 9rem 1fr; gap: 1.5rem; padding: 1.8rem 0; border-bottom: 1px solid var(--line); }
.tool-rank { color: var(--orange-ink); font: .8rem var(--serif); padding-top: .3rem; }
.tool-row h3 { font-size: 1.15rem; margin: 0 0 .5rem; letter-spacing: -.02em; }
.tool-row h3 code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .95em; background: var(--cream); border: 1px solid var(--line); border-radius: .4rem; padding: .1rem .4rem; }
.tool-row p { color: var(--muted); margin: 0 0 .7rem; max-width: 38rem; }
.tool-row a { font-size: .8rem; font-weight: 750; text-decoration: none; }
.tool-row a:hover { text-decoration: underline; text-underline-offset: .25em; }
.brief-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin-top: 1rem; }
.brief-card { background: var(--cream); border: 1px solid var(--line); border-radius: var(--radius-card); box-shadow: var(--shadow-card); padding: 1.5rem; }
.brief-card h3 { font-size: 1.05rem; margin: 0 0 .6rem; letter-spacing: -.02em; scroll-margin-top: 2rem; }
.brief-card p { color: var(--muted); font-size: .875rem; margin: 0 0 .8rem; }
.brief-card a { font-size: .8rem; font-weight: 750; text-decoration: none; }
.brief-card a:hover { text-decoration: underline; text-underline-offset: .25em; }
.feature-article { max-width: 1200px; }
.feature-article h1 { font-size: clamp(2rem, 4.5vw, 3rem); margin-bottom: 1.5rem; }
.feature-article h2 { font-size: clamp(1.4rem, 2.5vw, 1.9rem); margin: 3rem 0 1rem; }
.feature-article p, .feature-article li { max-width: 42rem; }
.feature-article ul { color: var(--muted); }
.live-example { background: var(--cream); border: 1px solid var(--line); border-radius: var(--radius-card); box-shadow: var(--shadow-card); padding: 2rem; max-width: 46rem; }
.live-example pre { background: var(--paper); border: 1px solid var(--line); border-radius: .6rem; padding: 1.2rem 1.4rem; overflow-x: auto; font-size: .85rem; line-height: 1.6; margin: 0 0 1rem; }
.live-example pre code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.internal-illustration { background: var(--mint); border: 1px solid var(--line); border-radius: var(--radius-card); padding: 1.5rem 1.8rem; max-width: 46rem; margin-top: 1.5rem; }
.internal-illustration p { color: var(--ink); font-size: .875rem; margin: 0; max-width: 40rem; }
.api-surface { display: grid; grid-template-columns: 8rem 1fr; gap: .6rem 1.5rem; max-width: 46rem; background: var(--paper); border: 1px solid var(--line); border-radius: .6rem; padding: 1.2rem 1.4rem; margin: 0; }
.api-surface dt { font-weight: 750; font-size: .875rem; }
.api-surface dd { margin: 0; color: var(--muted); font-size: .875rem; }
.api-surface dd code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .85em; }
.honesty-note { border-left: 3px solid var(--orange); padding-left: 1.2rem; color: var(--muted); font-size: .875rem; margin-top: 2rem; }
.honesty ul { color: var(--muted); max-width: 42rem; }
.pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: .875rem; font-weight: 750; }
.pager a { text-decoration: none; }
.pager a:hover { text-decoration: underline; text-underline-offset: .25em; }
@media (max-width: 700px) { .tool-row { grid-template-columns: 1fr; gap: .4rem; } .brief-grid { grid-template-columns: 1fr; } .api-surface { grid-template-columns: 1fr; } }
.intent-zoom .zoom-label { color: var(--muted); text-transform: uppercase; letter-spacing: .15em; font-size: .68rem; font-weight: 800; margin: 2rem 0 .75rem; }
.intent-zoom .zoom-block { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .85rem; line-height: 1.6; background: var(--ink); color: var(--cream); border-radius: var(--radius-card); padding: var(--space-4); overflow-x: auto; white-space: pre-wrap; }
.intent-zoom .example-note { color: var(--muted); font-size: .875rem; }
.zoom-figure { margin: 0; }
.zoom-figure img { width: 100%; height: auto; border-radius: var(--radius-card); }
.zoom-steps details { border: 1px solid var(--line); border-radius: var(--radius-card); padding: var(--space-3) var(--space-4); margin-top: var(--space-2); background: var(--cream); }
.zoom-steps summary { cursor: pointer; font-weight: 700; }

/* SF-FIX 2026-09-04: pressed feedback for interactive controls only (operator ruling: ADD-for-controls + EXEMPT-static). Brightness always applies; the 1px press shift is gated behind no-preference to match the existing reduced-motion policy above. Static text (checksums, release notes, non-focusable copy) is intentionally unstyled — no :active there. */
.button:active, .tab:active[aria-selected="false"], .feature-card a:active, .tool-row a:active, .brief-card a:active, .pager a:active, .footer-links a:active { filter: brightness(.96); }
@media (prefers-reduced-motion: no-preference) { .button:active, .tab:active[aria-selected="false"], .feature-card a:active, .tool-row a:active, .brief-card a:active, .pager a:active, .footer-links a:active { transform: translateY(1px); } }