/* Perspective Grid — shared site styles (no build step, no CSS framework). */
:root {
  --bg: #F8FAFC;
  --surface: #FFFFFF;
  --surface-2: #F1F5F9;
  --ink: #0F172A;
  --ink-2: #1E293B;
  --muted: #5C5C5C;
  --rule: #E2E8F0;
  --rule-strong: #CBD5E1;
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-soft: #EFF6FF;
  --primary-ring: #BFDBFE;
  --success: #166534;
  --danger: #B91C1C;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
  --shadow-lg: 0 18px 48px rgba(37, 99, 235, .12);
  --header-h: 64px;
  --font: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.6; }
img, svg { max-width: 100%; }
a { color: var(--primary); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--primary-hover); }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
/* The canvas keeps its focus ring inside its own edge so it never paints onto the dim workspace. */
#artboard:focus-visible { outline: 2px solid var(--primary); outline-offset: -2px; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.site { min-height: 100vh; display: flex; flex-direction: column; }
.site > main { flex: 1; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.icon { width: 18px; height: 18px; flex: none; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- Buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: var(--radius-md); border: 1px solid transparent; padding: 9px 16px; font-size: 14px; font-weight: 600; line-height: 1.2; text-decoration: none; white-space: nowrap; transition: background-color .15s, border-color .15s, color .15s, box-shadow .15s; }
.btn-primary, .accent-btn { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 1px 2px rgba(37, 99, 235, .25); }
.btn-primary:hover, .accent-btn:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: #fff; }
.btn-secondary, .ghost-btn { background: var(--surface); color: var(--ink); border-color: var(--rule-strong); }
.btn-secondary:hover, .ghost-btn:hover { background: var(--primary-soft); border-color: var(--primary-ring); color: var(--primary-hover); }
.btn-text { background: transparent; border-color: transparent; color: var(--muted); padding: 8px 10px; font-weight: 500; }
.btn-text:hover { color: var(--ink); background: var(--surface-2); }
.btn-sm { padding: 7px 12px; font-size: 13px; }
.btn-block { width: 100%; }
button[disabled], button[aria-busy="true"] { opacity: .7; cursor: progress; }

/* ---------- Header ---------- */
.site-header { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50; background: #fff; border-bottom: 1px solid var(--rule); }
.site-header__inner { height: var(--header-h); display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; font-size: 16px; letter-spacing: -.01em; text-decoration: none; white-space: nowrap; }
.brand:hover { color: var(--ink); }
.brand__mark { width: 30px; height: 30px; border-radius: 8px; background: var(--primary); display: grid; place-items: center; box-shadow: 0 2px 6px rgba(37, 99, 235, .35); }
.brand__mark svg { width: 20px; height: 20px; }
.site-nav { display: flex; align-items: center; gap: 4px; flex: 1; }
.site-nav > a, .nav-trigger { display: inline-flex; align-items: center; gap: 4px; padding: 8px 12px; border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--ink-2); text-decoration: none; background: none; border: 0; }
.site-nav > a:hover, .nav-trigger:hover, .nav-group.is-open .nav-trigger { background: var(--primary-soft); color: var(--primary-hover); }
.nav-trigger .icon { width: 16px; height: 16px; transition: transform .15s; }
.nav-group { position: relative; }
.nav-group.is-open .nav-trigger .icon { transform: rotate(180deg); }
.nav-menu { position: absolute; top: calc(100% + 8px); left: 0; min-width: 320px; padding: 8px; background: #fff; border: 1px solid var(--rule); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); display: none; }
.nav-group.is-open .nav-menu { display: block; }
@media (hover: hover) and (min-width: 960px) {
  .nav-group:hover .nav-menu, .nav-group:focus-within .nav-menu { display: block; }
  .nav-group:hover .nav-trigger .icon { transform: rotate(180deg); }
  .nav-menu::before { content: ''; position: absolute; left: 0; right: 0; top: -10px; height: 10px; }
}
.nav-menu__label { margin: 4px 10px 6px; font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
.nav-item { display: flex; gap: 12px; align-items: flex-start; padding: 10px; border-radius: 10px; text-decoration: none; color: var(--ink); }
.nav-item:hover { background: var(--primary-soft); color: var(--ink); }
.nav-item__icon { width: 34px; height: 34px; flex: none; border-radius: 8px; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; font-size: 12px; font-weight: 700; }
.nav-item:hover .nav-item__icon { background: #fff; }
.nav-item__title { display: block; font-size: 14px; font-weight: 600; line-height: 1.3; }
.nav-item__desc { display: block; font-size: 13px; color: var(--muted); line-height: 1.4; margin-top: 2px; }
.site-header__actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.menu-toggle { display: none; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--rule); background: #fff; align-items: center; justify-content: center; color: var(--ink); }
.mobile-panel { display: none; }
@media (max-width: 959px) {
  .site-header__inner { gap: 12px; }
  .site-nav { display: none; }
  .menu-toggle { display: inline-flex; }
  .mobile-panel { border-top: 1px solid var(--rule); background: #fff; max-height: calc(100vh - var(--header-h)); overflow: auto; }
  .mobile-panel.is-open { display: block; }
  .mobile-panel .container { padding-top: 12px; padding-bottom: 20px; }
  .mobile-panel__group { padding: 8px 0; border-bottom: 1px solid var(--rule); }
  .mobile-panel__group:last-child { border-bottom: 0; }
  .mobile-panel .nav-menu__label { margin-left: 0; }
  .mobile-panel .nav-item { padding: 10px 4px; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .brand__text { display: none; }
}

/* ---------- Footer ---------- */
.site-footer { margin-top: 80px; background: #fff; border-top: 1px solid var(--rule); color: var(--muted); font-size: 14px; }
.site-footer__grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 40px; padding-top: 56px; padding-bottom: 40px; }
.site-footer__about p { margin: 14px 0 0; max-width: 300px; line-height: 1.6; }
.site-footer__badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.footer-col h2 { margin: 0 0 14px; font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--ink); }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.footer-col a, .site-footer__bottom a { color: var(--muted); text-decoration: none; }
.footer-col a:hover, .site-footer__bottom a:hover { color: var(--primary); text-decoration: underline; }
.site-footer__bottom { border-top: 1px solid var(--rule); padding-top: 20px; padding-bottom: 28px; display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; align-items: center; font-size: 13px; }
@media (max-width: 860px) { .site-footer__grid { grid-template-columns: 1fr 1fr; gap: 32px 24px; } .site-footer__about { grid-column: 1 / -1; } }
@media (max-width: 420px) { .site-footer__grid { grid-template-columns: 1fr; } }

/* ---------- Chips / badges ---------- */
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 5px 11px; border-radius: 999px; background: var(--primary-soft); color: var(--primary-hover); font-size: 13px; font-weight: 500; border: 1px solid var(--primary-ring); }
.chip .icon { width: 15px; height: 15px; }
.chip-neutral { background: var(--surface-2); color: var(--ink-2); border-color: var(--rule); }

/* ---------- Content pages (about, legal, tutorials) ---------- */
.page { width: 100%; max-width: 760px; margin: 0 auto; padding: 48px 24px 0; }
.page-kicker { font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--primary); margin: 0 0 10px; }
.page h1 { font-size: clamp(30px, 4.5vw, 40px); line-height: 1.15; letter-spacing: -.02em; margin: 0 0 20px; color: var(--ink); }
.page h2 { font-size: 22px; line-height: 1.3; letter-spacing: -.01em; margin: 36px 0 12px; color: var(--ink); }
.page p, .page li { font-size: 16px; color: var(--muted); line-height: 1.7; }
.page p { margin: 0 0 14px; }
.page ul, .page ol { padding-left: 22px; }
.page li { margin: 6px 0; }
.page strong { color: var(--ink); }
.page img { display: block; width: 100%; height: auto; border-radius: var(--radius-lg); border: 1px solid var(--rule); background: #fff; margin: 8px 0 12px; }
.page .step { border: 1px solid var(--rule); background: #fff; border-radius: var(--radius-md); padding: 16px 18px; margin: 12px 0 18px; }
.page .step p { margin: 0; }
.page .callout { margin-top: 32px; background: var(--primary-soft); border: 1px solid var(--primary-ring); border-radius: var(--radius-lg); padding: 20px 22px; }
.page .callout p { margin: 0; color: var(--ink); font-weight: 500; }
.page-card { background: #fff; border: 1px solid var(--rule); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow-sm); }
.page-back { margin-top: 28px; }

/* ---------- Notifications & PDF dialog (used by app.js) ---------- */
.pg-notification { position: fixed; bottom: 24px; right: 24px; max-width: calc(100vw - 48px); padding: 12px 20px; background: var(--success); color: #fff; border-radius: 10px; z-index: 10001; font-size: 14px; box-shadow: var(--shadow-md); }
.pg-notification.error { background: var(--danger); }
.pdf-overlay { position: fixed; inset: 0; background: rgba(15, 23, 42, .55); display: grid; place-items: center; z-index: 10000; }
.pdf-panel { background: #fff; width: min(400px, 90vw); padding: 24px; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.pdf-panel h2 { margin: 0 0 16px; font-size: 18px; }
.pdf-panel label { font-size: 13px; font-weight: 500; color: var(--muted); }
.pdf-panel p { margin: 0; font-size: 13px; color: var(--muted); }
.pdf-panel select { width: 100%; padding: 9px 10px; margin: 8px 0 16px; border: 1px solid var(--rule-strong); border-radius: 8px; background: #fff; }
.pdf-actions { display: flex; gap: 8px; margin-top: 20px; }
.pdf-actions button { flex: 1; padding: 10px; border: 1px solid var(--rule-strong); border-radius: 10px; background: #fff; font-weight: 600; }
.pdf-actions button.accent-btn { background: var(--primary); border-color: var(--primary); color: #fff; }

.site-footer__support{margin:.75rem 0 0;font-size:.9rem;opacity:.9}
.site-footer__support a{text-decoration:underline}

/* Featured on (home footer directory badges) */
.site-footer__featured { padding: 8px 0 4px; }
.featured-on { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; margin: 8px 0 16px; font-size: 13px; opacity: .9; }
.featured-on-label { font-weight: 600; color: var(--ink); }
.featured-on-item img { max-width: 160px; height: auto !important; width: auto; display: block; }
.featured-on-item a { display: inline-block; color: var(--muted); text-decoration: none; }
.featured-on-item a:hover { color: var(--primary); text-decoration: underline; }