/*! StiffStruct, (c) 2026 Mohammad Asad. All rights reserved. Proprietary: copying, mirroring or reusing this code is not permitted without written permission (see terms.html#intellectual-property). build 20261018-2109 */
/* StiffStruct website pages — normal scrolling documents (the app's own layout lives in app.css, which locks the body).
 * Link css/tokens.css BEFORE this file. Every colour comes from a token, so light / dark and high / normal contrast work
 * automatically (<html data-theme>, <html data-contrast>). Class prefix: s-
 */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--font-ui); font-size: 16px; line-height: 1.6;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }

img, svg { max-width: 100%; }
a { color: var(--accent-text); text-underline-offset: 3px; }
a:hover { color: var(--accent-hover); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
code, kbd, pre { font-family: var(--font-mono); font-size: .92em; }
code { background: var(--bg-sunken); border: 1px solid var(--border); border-radius: 5px; padding: .08em .35em; }
kbd {
  display: inline-block; min-width: 1.7em; padding: .05em .45em; text-align: center; color: var(--fg);
  background: var(--bg-elev); border: 1px solid var(--border-strong); border-bottom-width: 2px; border-radius: 6px;
}
hr { border: 0; border-top: 1px solid var(--border); margin: 32px 0; }
.s-muted { color: var(--fg-muted); }
.s-soon { color: var(--fg-muted); font-style: italic; }
[hidden] { display: none !important; }
.s-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.s-skip {
  position: absolute; left: 12px; top: -60px; z-index: 100; padding: 10px 16px; border-radius: var(--radius);
  background: var(--accent); color: var(--accent-fg); font-weight: 600; text-decoration: none;
}
.s-skip:focus { top: 10px; }

/* ---- layout ---- */
.s-container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 20px; }
.s-narrow { max-width: 780px; }
.s-section { padding: 64px 0; }
.s-section-alt { background: var(--bg-elev); border-block: 1px solid var(--border); }
.s-section-head { max-width: 720px; margin: 0 0 32px; }
.s-section-head.is-center { margin-inline: auto; text-align: center; }
.s-eyebrow { margin: 0 0 8px; font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-text); }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 5.2vw, 3.2rem); font-weight: 800; letter-spacing: -.02em; }
h2 { font-size: clamp(1.5rem, 3.4vw, 2.05rem); font-weight: 750; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0 0 1em; }
.s-lead { font-size: clamp(1.05rem, 2vw, 1.25rem); color: var(--fg-muted); max-width: 60ch; }
.s-page-head { padding: 48px 0 24px; border-bottom: 1px solid var(--border); background: linear-gradient(180deg, var(--accent-soft), transparent 120%); }
.s-page-head h1 { font-size: clamp(1.8rem, 4.2vw, 2.6rem); margin-bottom: .3em; }
.s-page-head p { margin: 0; color: var(--fg-muted); max-width: 64ch; }
.s-main { min-height: 60vh; }

/* ---- header / nav ---- */
.s-header { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--bg-elev) 90%, transparent); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.s-header-inner { display: flex; align-items: center; gap: 12px; min-height: 60px; }
.s-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.1rem; color: var(--fg); text-decoration: none; letter-spacing: -.01em; }
.s-brand:hover { color: var(--fg); }
.s-nav { display: flex; align-items: center; gap: 2px; margin-left: 20px; flex: 1; }
.s-nav a { padding: 8px 12px; border-radius: var(--radius-sm); color: var(--fg-muted); text-decoration: none; font-weight: 550; font-size: .95rem; transition: background-color .15s, color .15s; }
@media (hover: hover) and (pointer: fine) { .s-nav a:hover { background: var(--bg-hover); color: var(--fg); } }
.s-nav a[aria-current="page"] { color: var(--accent-text); background: var(--accent-soft); }
.s-actions { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.s-iconbtn {
  display: inline-grid; place-items: center; width: 40px; height: 40px; padding: 0; cursor: pointer;
  color: var(--fg); background: transparent; border: 1px solid transparent; border-radius: var(--radius);
  transition: background-color .15s, border-color .15s, transform .16s var(--ease-out);
}
@media (hover: hover) and (pointer: fine) { .s-iconbtn:hover { background: var(--bg-hover); border-color: var(--border); } }
.s-iconbtn:active { transform: scale(0.95); }
.s-iconbtn[data-act="contrast"][aria-pressed="true"] { color: var(--accent-text); background: var(--accent-soft); }
.s-menu-btn { display: none; }
@media (max-width: 859px) {
  .s-menu-btn { display: inline-grid; }
  .s-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%; margin: 0; flex-direction: column; align-items: stretch;
    padding: 8px 20px 16px; background: var(--bg-elev); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-2);
  }
  .s-nav.is-open { display: flex; transform-origin: top; animation: s-menu-in .18s var(--ease-out); }
  .s-nav a { padding: 12px; font-size: 1rem; }
}

/* ---- buttons ---- */
.s-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; min-height: 44px;
  font: inherit; font-weight: 650; line-height: 1.2; text-align: center; text-decoration: none; cursor: pointer;
  color: var(--fg); background: var(--bg-elev); border: 1px solid var(--border-strong); border-radius: var(--radius);
  transition: background-color .15s, border-color .15s, color .15s, transform .16s var(--ease-out);
}
@media (hover: hover) and (pointer: fine) { .s-btn:hover { background: var(--bg-sunken); color: var(--fg); border-color: var(--fg-muted); } }
.s-btn:active { transform: scale(0.97); }
.s-btn-primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); box-shadow: var(--shadow-1); }
@media (hover: hover) and (pointer: fine) { .s-btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-fg); } }
.s-btn-lg { padding: 13px 24px; font-size: 1.05rem; }
.s-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0 8px; }

/* ---- hero ---- */
.s-hero { padding: 56px 0 48px; background: radial-gradient(60% 70% at 85% 0%, var(--accent-soft), transparent 70%); }
.s-hero-grid { display: grid; gap: 40px; align-items: center; }
@media (min-width: 960px) { .s-hero-grid { grid-template-columns: 1fr 1.08fr; } .s-hero { padding: 72px 0 64px; } }
.s-hero h1 { margin-bottom: .45em; }
.s-hero-note { color: var(--fg-muted); font-size: .92rem; margin: 6px 0 0; }
/* entrance: hero copy rises in with a short stagger, the live figure fades in behind it.
   (the reduced-motion rule at the top switches animations off, which leaves everything visible) */
@keyframes s-rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes s-menu-in { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
.s-hero-grid > :first-child > * { animation: s-rise .4s var(--ease-out) both; }
.s-hero-grid > :first-child > :nth-child(2) { animation-delay: 50ms; }
.s-hero-grid > :first-child > :nth-child(3) { animation-delay: 100ms; }
.s-hero-grid > :first-child > :nth-child(4) { animation-delay: 150ms; }
.s-hero-grid > :first-child > :nth-child(5) { animation-delay: 200ms; }
.s-hero-grid > .s-figure { animation: s-rise .5s var(--ease-out) 120ms both; }
.s-pill { display: inline-block; margin-bottom: 16px; padding: 4px 12px; border-radius: 999px; font-size: .82rem; font-weight: 650; color: var(--accent-text); background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); }

/* live figure */
.s-figure { background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-2); overflow: hidden; min-width: 0; }
.s-figure-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 10px 12px; border-bottom: 1px solid var(--border); background: var(--bg-sunken); }
.s-figure-title { flex: 1 1 200px; font-size: .88rem; font-weight: 650; }
.s-tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.s-tab { padding: 6px 12px; font: inherit; font-size: .85rem; font-weight: 600; color: var(--fg-muted); background: transparent; border: 1px solid transparent; border-radius: var(--radius-sm); cursor: pointer; transition: background-color .15s, border-color .15s, color .15s, transform .16s var(--ease-out); }
@media (hover: hover) and (pointer: fine) { .s-tab:hover { background: var(--bg-hover); color: var(--fg); } }
.s-tab:active { transform: scale(0.97); }
.s-tab[aria-selected="true"] { color: var(--accent-text); background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 35%, transparent); }
.s-figure-body { padding: 8px 8px 0; background: var(--bg); min-height: 200px; }
.s-figure-body svg { display: block; width: 100%; height: auto; }
.s-figure-cap { margin: 0; padding: 10px 14px 12px; font-size: .86rem; color: var(--fg-muted); border-top: 1px solid var(--border); }
.s-figure-cap strong { color: var(--fg); }

/* ---- stats ---- */
.s-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); gap: 16px; padding: 28px 0; }
.s-stat { padding: 4px 0 4px 16px; border-left: 3px solid var(--accent); }
.s-stat b { display: block; font-size: 1.7rem; line-height: 1.15; letter-spacing: -.02em; }
.s-stat span { color: var(--fg-muted); font-size: .92rem; }

/* ---- cards / grids ---- */
.s-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); }
.s-grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); }
.s-card { background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px; box-shadow: var(--shadow-1); }
.s-card h3 { margin-bottom: .35em; }
.s-card p:last-child, .s-card ul:last-child { margin-bottom: 0; }
.s-card p { color: var(--fg-muted); }
.s-feature .s-ic { width: 40px; height: 40px; padding: 9px; margin-bottom: 12px; color: var(--accent-text); background: var(--accent-soft); border-radius: var(--radius); }
.s-ic { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.s-list { margin: 0 0 1em; padding-left: 1.2em; }
.s-list li { margin: .3em 0; }
.s-check { list-style: none; padding: 0; margin: 0 0 1em; }
.s-check li { position: relative; padding-left: 28px; margin: .45em 0; }
.s-check li::before { content: ""; position: absolute; left: 0; top: .3em; width: 18px; height: 18px; border-radius: 50%; background: var(--success-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2315803d' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 12.5l4 4 8-9'/%3E%3C/svg%3E") center/12px no-repeat; border: 1px solid color-mix(in srgb, var(--success) 45%, transparent); }
.s-check.is-no li::before { background: var(--bg-sunken) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b93a3' stroke-width='3.2' stroke-linecap='round'%3E%3Cpath d='M7 12h10'/%3E%3C/svg%3E") center/12px no-repeat; border-color: var(--border-strong); }

/* ---- steps ---- */
.s-steps { counter-reset: step; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); margin: 0; padding: 0; list-style: none; }
.s-steps > li { counter-increment: step; position: relative; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 20px 20px 20px 20px; }
.s-steps > li::before { content: counter(step); display: grid; place-items: center; width: 34px; height: 34px; margin-bottom: 12px; font-weight: 800; color: var(--accent-fg); background: var(--accent); border-radius: 50%; }
.s-steps h3 { margin-bottom: .3em; }
.s-steps p { margin: 0; color: var(--fg-muted); }

/* ---- table ---- */
.s-table-wrap { position: relative; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--bg-elev); -webkit-overflow-scrolling: touch; }
.s-table { width: 100%; min-width: 620px; border-collapse: collapse; font-size: .95rem; }
.s-table th, .s-table td { padding: 12px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
.s-table thead th { background: var(--bg-sunken); font-weight: 700; white-space: nowrap; }
.s-table tbody tr:last-child th, .s-table tbody tr:last-child td { border-bottom: 0; }
.s-table tbody th { font-weight: 600; }
.s-table .is-us { background: var(--accent-soft); font-weight: 650; }
.s-table-note { margin: 12px 2px 0; font-size: .88rem; color: var(--fg-muted); }

/* ---- FAQ ---- */
.s-faq { display: grid; gap: 10px; max-width: 820px; }
.s-faq details { background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); }
.s-faq summary { list-style: none; cursor: pointer; padding: 14px 48px 14px 18px; position: relative; font-weight: 650; }
.s-faq summary::-webkit-details-marker { display: none; }
.s-faq summary::after { content: ""; position: absolute; right: 18px; top: 50%; width: 9px; height: 9px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: translateY(-70%) rotate(45deg); transition: transform .15s; }
.s-faq details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.s-faq details[open] summary { border-bottom: 1px solid var(--border); }
.s-faq summary:hover { background: var(--bg-hover); }
.s-faq .s-answer { padding: 14px 18px 4px; color: var(--fg-muted); }
.s-faq .s-answer > :last-child { margin-bottom: 12px; }
.s-faq-group { margin: 36px 0 12px; }

/* ---- callouts ---- */
.s-callout { margin: 20px 0; padding: 14px 18px; border-radius: var(--radius); border: 1px solid color-mix(in srgb, var(--info) 35%, transparent); border-left: 4px solid var(--info); background: var(--info-soft); }
.s-callout.is-warning { border-color: color-mix(in srgb, var(--warning) 40%, transparent); border-left-color: var(--warning); background: var(--warning-soft); }
.s-callout.is-success { border-color: color-mix(in srgb, var(--success) 40%, transparent); border-left-color: var(--success); background: var(--success-soft); }
.s-callout > :last-child { margin-bottom: 0; }
.s-callout strong { color: var(--fg); }

/* ---- prose pages (legal, about) ---- */
.s-prose { max-width: 74ch; padding: 40px 0 72px; }
.s-prose h2 { margin-top: 2.2em; padding-top: .3em; font-size: 1.45rem; }
.s-prose h3 { margin-top: 1.6em; }
.s-prose ul, .s-prose ol { padding-left: 1.4em; margin: 0 0 1em; }
.s-prose li { margin: .35em 0; }
.s-meta { color: var(--fg-muted); font-size: .92rem; }
.s-toc { margin: 0 0 8px; padding: 16px 20px; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); }
.s-toc b { display: block; margin-bottom: 6px; }
.s-toc ol { columns: 2 260px; margin: 0; padding-left: 1.3em; }
.s-toc li { margin: .15em 0; break-inside: avoid; }
.s-author { display: flex; gap: 20px; align-items: flex-start; margin: 0 0 1em; }
.s-author-photo { flex: 0 0 auto; width: 120px; height: 120px; border-radius: 50%; overflow: hidden; display: flex; align-items: center; justify-content: center;
  font-size: 2.2rem; font-weight: 700; letter-spacing: .04em; color: var(--accent); background: var(--accent-soft); border: 1px solid var(--border-strong); }
.s-author-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.s-author-body { flex: 1 1 auto; min-width: 0; }
.s-author-body p:first-child { margin-top: 0; }
@media (max-width: 560px) { .s-author { flex-direction: column; } }
.s-todo { padding: 1px 6px; border-radius: 4px; background: var(--warning-soft); border: 1px dashed var(--warning); font-weight: 600; }

/* ---- support / contact ---- */
.s-kbd-table { width: 100%; border-collapse: collapse; }
.s-kbd-table th, .s-kbd-table td { padding: 8px 4px; border-bottom: 1px solid var(--border); text-align: left; }
.s-kbd-table td:first-child { white-space: nowrap; padding-right: 16px; }
.s-form { display: grid; gap: 14px; }
.s-field { display: grid; gap: 6px; }
.s-field label { font-weight: 650; font-size: .95rem; }
.s-field input, .s-field textarea {
  width: 100%; padding: 11px 12px; font: inherit; color: var(--fg); background: var(--bg-elev);
  border: 1px solid var(--border-strong); border-radius: var(--radius);
}
.s-field textarea { min-height: 150px; resize: vertical; }
.s-field input:focus, .s-field textarea:focus { outline: none; border-color: var(--accent); box-shadow: var(--focus-ring); }
.s-form-status { min-height: 1.4em; margin: 0; font-size: .92rem; color: var(--fg-muted); }
.s-form-status.is-bad { color: var(--danger); font-weight: 600; }

/* ---- CTA band + footer ---- */
.s-cta-band { text-align: center; padding: 56px 20px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: radial-gradient(70% 120% at 50% 0%, var(--accent-soft), var(--bg-elev) 80%); }
.s-cta-band p { color: var(--fg-muted); max-width: 52ch; margin-inline: auto; }
.s-cta-band .s-cta { justify-content: center; }
.s-footer { margin-top: 0; padding: 36px 0 28px; background: var(--bg-elev); border-top: 1px solid var(--border); }
.s-footer-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 32px; }
.s-footer-nav { display: flex; flex-wrap: wrap; gap: 4px 20px; }
.s-footer-nav a { color: var(--fg-muted); text-decoration: none; padding: 6px 0; font-size: .95rem; }
.s-footer-nav a:hover, .s-footer-nav a[aria-current="page"] { color: var(--accent-text); text-decoration: underline; }
.s-footer-copy { margin: 20px 0 0; font-size: .88rem; color: var(--fg-muted); }

@media (max-width: 600px) {
  .s-section { padding: 44px 0; }
  .s-hero { padding-top: 36px; }
  .s-container { padding: 0 16px; }
  .s-cta .s-btn { flex: 1 1 100%; }
  .s-nav { padding-inline: 16px; }
}
@media print {
  .s-header, .s-footer, .s-cta, .s-skip { display: none !important; }
  body { background: #fff; color: #000; }
}