/* NextFlow's shared visual language. Legacy page tokens resolve to this palette. */
:root {
  color-scheme: light;
  --nf-bg: #f7f8f5; --nf-card: #fff; --nf-surface: #eef2ed;
  --nf-text: #15261f; --nf-secondary: #44584e; --nf-muted: #5d7063;
  --nf-line: #e0e7df; --nf-line-strong: #cbd7cb; --nf-card-rgb: 255,255,255;
  --nf-accent: #176348; --nf-accent-soft: #e2f1e7; --nf-on-accent: #fff;
  --nf-success: #276940; --nf-success-bg: #e9f3ea;
  --nf-info: #275f84; --nf-info-bg: #e8f1f7;
  --nf-warning: #78561b; --nf-warning-bg: #f7f0df;
  --nf-danger: #9b3838; --nf-danger-bg: #faeaea;
  --nf-shadow: 0 16px 50px -30px rgba(25,53,38,.28);
  --bg: var(--nf-bg); --text: var(--nf-text); --secondary: var(--nf-secondary);
  --muted: var(--nf-muted); --line: var(--nf-line); --line-strong: var(--nf-line-strong);
  --surface: var(--nf-surface); --surface-strong: var(--nf-surface); --accent: var(--nf-accent);
  --paper: var(--nf-bg); --cream: var(--nf-surface); --ink: var(--nf-text);
  --ink-2: var(--nf-secondary); --ink-3: var(--nf-muted); --ink-4: var(--nf-muted);
  --rule: var(--nf-line); --rule-2: var(--nf-line-strong); --dark: var(--nf-text);
  --accent-ink: var(--nf-on-accent); --accent-soft: var(--nf-accent-soft);
  --success: var(--nf-success); --success-soft: var(--nf-success-bg);
  --warning: var(--nf-warning); --warning-soft: var(--nf-warning-bg);
  --danger: var(--nf-danger); --danger-soft: var(--nf-danger-bg);
  --radius: 16px; --radius-lg: 24px;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --nf-bg: #101916; --nf-card: #17221d; --nf-surface: #1b2922;
  --nf-text: #ecf2eb; --nf-secondary: #bfcdc2; --nf-muted: #9aafa0;
  --nf-line: #2a3a30; --nf-line-strong: #405447; --nf-card-rgb: 23,34,29;
  --nf-accent: #a5dfba; --nf-accent-soft: #253e2e; --nf-on-accent: #10281b;
  --nf-success: #a6d9b1; --nf-success-bg: #203b2b;
  --nf-info: #a0cce8; --nf-info-bg: #1d3443;
  --nf-warning: #e7cd99; --nf-warning-bg: #3a3020;
  --nf-danger: #eab1ae; --nf-danger-bg: #3c2526;
  --nf-shadow: 0 20px 65px -30px rgba(0,0,0,.65);
}
/* Honor device appearance even if the tiny startup script is unavailable. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --nf-bg: #101916; --nf-card: #17221d; --nf-surface: #1b2922;
    --nf-text: #ecf2eb; --nf-secondary: #bfcdc2; --nf-muted: #9aafa0;
    --nf-line: #2a3a30; --nf-line-strong: #405447; --nf-card-rgb: 23,34,29;
    --nf-accent: #a5dfba; --nf-accent-soft: #253e2e; --nf-on-accent: #10281b;
    --nf-success: #a6d9b1; --nf-success-bg: #203b2b; --nf-info: #a0cce8; --nf-info-bg: #1d3443;
    --nf-warning: #e7cd99; --nf-warning-bg: #3a3020; --nf-danger: #eab1ae; --nf-danger-bg: #3c2526;
    --nf-shadow: 0 20px 65px -30px rgba(0,0,0,.65);
  }
}
[hidden] { display: none !important; }
body { background: var(--nf-bg); color: var(--nf-text); font-size: 16px; line-height: 1.7; }
::selection { background: var(--nf-accent); color: var(--nf-on-accent); }
:focus-visible { outline: 2px solid var(--nf-accent); outline-offset: 4px; }
button, input { font: inherit; }
button { cursor: pointer; }
svg { flex-shrink: 0; }
.site-header {
  background: color-mix(in srgb, var(--nf-bg) 88%, transparent);
  border-bottom-color: var(--nf-line); backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px); z-index: 100;
}
.nav { min-height: 76px; gap: 16px; }
.brand { font-size: 15px; letter-spacing: -.035em; flex-shrink: 0; }
.brand-mark { border-radius: 10px; background: var(--nf-text); }
.nav-links { margin-left: auto; gap: 2px; }
.nav-links a { font-size: 13px; font-weight: 550; padding-inline: 10px; border-radius: 10px; }
.nav-links a:hover, .nav-links a[aria-current] { color: var(--nf-accent); background: var(--nf-accent-soft); }
.nav-tools { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.menu-toggle, .theme-menu summary { min-height: 42px; border: 1px solid var(--nf-line-strong); border-radius: 11px; background: var(--nf-card); color: var(--nf-text); }
.menu-toggle { font-size: 13px; padding: 8px 12px; }
.theme-menu { position: relative; }
.theme-menu summary { display: grid; place-items: center; width: 42px; cursor: pointer; list-style: none; }
.theme-menu summary::-webkit-details-marker { display: none; }
.theme-menu[open] summary { border-color: var(--nf-accent); background: var(--nf-accent-soft); }
.theme-options { position: absolute; right: 0; top: calc(100% + 12px); width: 180px; padding: 16px; margin: 0; border: 1px solid var(--nf-line-strong); border-radius: 16px; background: var(--nf-card); box-shadow: var(--nf-shadow); }
.theme-options legend { float: left; width: 100%; margin-bottom: 10px; color: var(--nf-muted); font-size: 11px; font-weight: 650; text-transform: uppercase; letter-spacing: .12em; }
.theme-options label { clear: both; display: flex; align-items: center; gap: 10px; padding: 8px 0; font-size: 14px; cursor: pointer; }
.theme-options input { accent-color: var(--nf-accent); }
.btn { border-radius: 12px; padding: .78rem 1.3rem; min-height: 46px; border-color: var(--nf-line-strong); background: var(--nf-card); color: var(--nf-text); box-shadow: 0 1px 2px rgba(0,0,0,.03); }
.btn:hover { background: var(--nf-surface); color: var(--nf-text); border-color: var(--nf-accent); }
.btn.primary, .btn.solid, .btn.accent { background: var(--nf-accent); color: var(--nf-on-accent); border-color: var(--nf-accent); }
.btn.bmc, .btn.bmc:hover { background: var(--nf-accent); color: var(--nf-on-accent); border-color: var(--nf-accent); }
.btn.primary:hover, .btn.solid:hover { background: color-mix(in srgb, var(--nf-accent) 88%, var(--nf-text)); color: var(--nf-on-accent); }
.eyebrow, .article-category, .card-category { color: var(--nf-accent); border-color: var(--nf-line-strong); font-size: 11px; letter-spacing: .1em; }
h1, h2 { text-wrap: balance; letter-spacing: -.045em; }
h1 { font-weight: 600; }
.lead, .article-description { color: var(--nf-secondary); }
.hero { position: relative; padding-block: clamp(56px,8vw,104px); }
.page-home .hero { background: radial-gradient(ellipse at 80% 10%, var(--nf-accent-soft), transparent 62%); }
.page-library .hero { padding-block: 52px 64px; }
.page-library .section { padding-top: 48px; }
.page-home .hero-grid { grid-template-columns: 1.15fr 1fr; gap: clamp(32px,5vw,72px); }
.page-home h1 { font-size: clamp(2.65rem,5.5vw,4.7rem); line-height: 1.03; max-width: 12ch; }
.hero-emphasis { color: var(--nf-accent); }
.page-home .lead { font-size: 17px; max-width: 42ch; margin-top: 24px; }
.trust { display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--nf-muted); font-size: 11px; margin-top: 24px; }
.trust span::before { content: ""; display: inline-block; width: 4px; height: 4px; margin-right: 7px; border-radius: 50%; background: var(--nf-accent); vertical-align: middle; }
.section { padding-block: clamp(56px,7vw,88px); border-top-color: var(--nf-line); }
.section-head h2 { font-weight: 600; }
.product-card, .article-card, .feature, .ref-card, .offer-card, .sources, .author-box {
  background: var(--nf-card); border-color: var(--nf-line); border-radius: 20px; box-shadow: var(--nf-shadow);
}
.product-card { padding: 28px; }
.product-kicker { color: var(--nf-accent); letter-spacing: .12em; }
.product-header .app-logo { width: 52px; height: 52px; border-radius: 14px; }
.product-name { font-size: 23px; font-weight: 600; }
.product-desc { color: var(--nf-secondary); }
.product-card:hover, .article-card:hover { border-color: var(--nf-line-strong); box-shadow: 0 22px 65px -35px rgba(19,52,32,.35); }
.faq details { background: var(--nf-card); border-color: var(--nf-line); border-radius: 14px; }
.faq details[open] { border-color: var(--nf-line-strong); }
.seal { color: var(--nf-on-accent); }
/* Deliberately dark brand panels keep consistent contrast in both appearances. */
.final-cta, .related-app { background: #12291e; color: #edf5ed; border-color: #2d4938; }
.final-cta h2, .final-cta h3, .related-app h2, .related-app h3 { color: #edf5ed; }
.final-cta p, .related-app p { color: #c0d3c4; }
.final-cta .btn, .related-app .btn { color: #e5f3e8; background: transparent; border-color: #7c9986; }
.final-cta .btn.primary, .related-app .btn.primary { background: #b3e2c2; color: #132f1e; border-color: #b3e2c2; }
.final-cta .btn:hover, .related-app .btn:hover { color: #e5f3e8; background: #203c2b; border-color: #b3e2c2; }
.final-cta .btn.primary:hover, .related-app .btn.primary:hover { background: #c7ecd2; color: #132f1e; border-color: #c7ecd2; }
.final-cta .eyebrow, .related-app .eyebrow { color: #b3e2c2; background: transparent; border-color: #7c9986; }
.final-cta .kicker, .final-cta small { color: #c0d3c4; }
.final-cta .kicker { border-color: #7c9986; }
.final-cta .kicker .kicker-dot { background: #b3e2c2; }
.final-cta .btn.ghost-dark { color: #e5f3e8; background: transparent; border-color: #7c9986; }
.final-cta .btn.ghost-dark:hover { color: #e5f3e8; background: #203c2b; border-color: #b3e2c2; }
.breadcrumb a { text-decoration: underline; text-underline-offset: 3px; }
.site-footer { background: #0f1b15 !important; border-top: 1px solid #2a3a30 !important; }
.site-footer::before { background: radial-gradient(ellipse at 90% 0, #1d3628, transparent 65%); }
.site-footer .brand-mark { background: #edf5ed; }
.site-footer :focus-visible { outline-color: #b3e2c2; }
/* The homepage finder is a compact, interactive product guide. */
.flow-finder { background: var(--nf-card); border: 1px solid var(--nf-line-strong); border-radius: 28px; padding: 28px; box-shadow: var(--nf-shadow); }
.finder-topline { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 24px; }
.finder-status { display: inline-flex; align-items: center; gap: 7px; color: var(--nf-muted); font-size: 10px; }
.finder-status > span { width: 6px; height: 6px; border-radius: 50%; background: var(--nf-accent); }
.finder-mark { font-size: 10px; letter-spacing: .1em; color: var(--nf-muted); white-space: nowrap; }
.flow-finder h2 { font-size: 28px; font-weight: 550; margin: 0 0 5px; }
.finder-intro { margin: 0 0 20px; color: var(--nf-muted); font-size: 13px; }
.finder-choices { display: flex; gap: 5px; padding: 5px; border-radius: 12px; background: var(--nf-surface); }
.finder-choices button { flex: 1; border: 0; padding: 9px 4px; font-size: 12px; font-weight: 600; border-radius: 8px; color: var(--nf-secondary); background: transparent; }
.finder-choices button[aria-pressed="true"] { background: var(--nf-card); color: var(--nf-accent); box-shadow: 0 2px 8px rgba(0,0,0,.05); }
.finder-scene { position: relative; display: grid; place-items: center; min-height: 235px; margin: 20px 0; overflow: hidden; border-radius: 18px; background: radial-gradient(circle, var(--nf-accent-soft), transparent 70%), var(--nf-surface); }
.finder-scene::before, .finder-scene::after { content: ""; position: absolute; width: 270px; height: 270px; border: 1px solid var(--nf-line-strong); border-radius: 50%; opacity: .5; }
.finder-scene::after { width: 210px; height: 210px; }
.focus-ring { position: relative; z-index: 1; display: flex; flex-direction: column; justify-content: center; align-items: center; width: 154px; height: 154px; border: 5px solid var(--nf-accent); border-bottom-color: var(--nf-line-strong); border-radius: 50%; background: var(--nf-card); box-shadow: var(--nf-shadow); }
.focus-ring > span { display: grid; place-items: center; font-size: 32px; font-weight: 500; letter-spacing: -.04em; font-variant-numeric: tabular-nums; }
.focus-ring > small { margin-top: 6px; font-size: 7px; letter-spacing: .14em; color: var(--nf-muted); }
.scene-label { position: absolute; bottom: 12px; font-size: 9px; color: var(--nf-muted); letter-spacing: .04em; }
.finder-app { font-size: 13px; font-weight: 700; color: var(--nf-accent); }
.finder-recommendation p { min-height: 44px; font-size: 13px; color: var(--nf-secondary); line-height: 1.6; margin: 8px 0 14px; }
.finder-link { display: flex; justify-content: space-between; font-size: 13px; font-weight: 600; text-decoration: none; }
.finder-note { display: block; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--nf-line); color: var(--nf-muted); font-size: 9px; }
/* Article discovery: readable covers, topic chips and device-local saves. */
.library-tools { display: grid; gap: 20px; margin-bottom: 28px; }
.library-search label { display: block; font-size: 12px; font-weight: 650; margin-bottom: 10px; }
.library-search input { width: min(100%,560px); border: 1px solid var(--nf-line-strong); padding: 14px 18px; border-radius: 14px; background: var(--nf-card); color: var(--nf-text); appearance: auto; }
.library-search input::placeholder { color: var(--nf-muted); }
.topic-filters { display: flex; flex-wrap: wrap; gap: 8px; }
.topic-filters button { min-height: 40px; border: 1px solid var(--nf-line); border-radius: 999px; padding: 8px 16px; background: var(--nf-card); color: var(--nf-secondary); font-size: 12px; font-weight: 600; }
.topic-filters button[aria-pressed="true"] { background: var(--nf-accent); color: var(--nf-on-accent); border-color: var(--nf-accent); }
.library-count { margin: 0; font-size: 12px; color: var(--nf-muted); }
.article-card { position: relative; padding: 22px; overflow: hidden; }
.article-cover { display: block; margin: -22px -22px 24px; overflow: hidden; background: var(--nf-surface); aspect-ratio: 16/8.5; }
.article-cover img { display: block; width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.article-card:hover .article-cover img { transform: scale(1.025); }
.article-card h3 { font-size: 21px; font-weight: 600; line-height: 1.3; }
.card-meta { gap: 6px 12px; font-size: 11px; }
.card-link { color: var(--nf-accent); font-size: 12px; }
.save-guide { border: 1px solid var(--nf-line-strong); border-radius: 9px; background: var(--nf-card); color: var(--nf-secondary); padding: 6px 10px; min-height: 36px; font-size: 11px; }
.save-guide[aria-pressed="true"] { background: var(--nf-accent-soft); color: var(--nf-accent); border-color: var(--nf-accent); }
.article-card .save-guide { margin-top: 16px; align-self: flex-start; }
.library-empty { border: 1px dashed var(--nf-line-strong); padding: 40px 24px; border-radius: 18px; text-align: center; }
/* Long-form reading: useful controls without distracting from the article. */
.reading-progress { position: fixed; top: 0; left: 0; width: 100%; height: 3px; z-index: 150; pointer-events: none; }
.reading-progress span { display: block; height: 100%; background: var(--nf-accent); transform: scaleX(0); transform-origin: left; }
.guide-tools { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin: 20px 0 28px; }
.guide-tools button { padding: 8px 12px; min-height: 38px; border: 1px solid var(--nf-line-strong); border-radius: 10px; background: var(--nf-card); color: var(--nf-secondary); font-size: 12px; }
.guide-tools .save-guide[aria-pressed="true"] { color: var(--nf-accent); background: var(--nf-accent-soft); }
.guide-tool-status { font-size: 11px; color: var(--nf-muted); }
.table-of-contents a[aria-current="location"] { color: var(--nf-accent); font-weight: 650; background: var(--nf-accent-soft); border-radius: 7px; padding-inline: 8px; }
.back-to-top { position: fixed; bottom: 24px; right: 24px; z-index: 55; width: 42px; height: 42px; border: 1px solid var(--nf-line-strong); border-radius: 13px; background: var(--nf-card); color: var(--nf-text); box-shadow: var(--nf-shadow); display: grid; place-items: center; }
body:has(.mobile-cta.visible) .back-to-top { bottom: 100px; }
/* Small, finite interactions and scroll reveals; nothing loops automatically. */
@media (prefers-reduced-motion: no-preference) {
  .btn, .product-card, .article-card, .feature { transition: transform .22s ease, border-color .22s ease, background-color .22s ease, box-shadow .22s ease; }
  .reveal-pending { opacity: 0; transform: translateY(16px); }
  .reveal-ready { opacity: 1; transform: none; transition: opacity .6s ease, transform .6s ease; }
  .finder-scene.is-changing .focus-ring { animation: finder-settle .35s ease both; }
  @keyframes finder-settle { from { opacity: .5; transform: scale(.95); } to { opacity: 1; transform: scale(1); } }
}
@media (max-width: 1100px) { .nav-links a { padding-inline: 7px; font-size: 12px; } }
@media (max-width: 1000px) {
  .nav-enhanced .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-enhanced .nav-links { position: absolute; inset: 76px 16px auto; display: none; margin: 0; padding: 10px; border: 1px solid var(--nf-line-strong); border-radius: 16px; background: var(--nf-card); box-shadow: var(--nf-shadow); flex-direction: column; align-items: stretch; max-height: calc(100dvh - 100px); overflow-y: auto; }
  .nav-enhanced .nav-links.is-open { display: flex; }
  .nav-links a { font-size: 14px; padding: 10px 12px; }
  .nav-tools { margin-left: auto; }
  html:not(.nav-enhanced) .nav { flex-wrap: wrap; }
  html:not(.nav-enhanced) .nav-links { position: static; display: flex; flex-wrap: wrap; width: 100%; margin: 0; }
}
@media (max-width: 820px) {
  .page-home .hero-grid { grid-template-columns: 1fr; }
  .page-home h1 { max-width: 15ch; }
  .flow-finder { max-width: 520px; width: 100%; margin-inline: auto; }
}
@media (max-width: 480px) {
  .nav { min-height: 72px; gap: 8px; }
  .brand { font-size: 13px; gap: 7px; }
  .brand-mark { width: 28px; height: 28px; }
  .menu-toggle { padding: 7px 9px; min-height: 40px; }
  .theme-menu summary { width: 40px; min-height: 40px; }
  .nav-tools { gap: 6px; }
  .page-home h1 { font-size: clamp(2.5rem,11vw,3.5rem); }
  .page-home .lead { font-size: 15px; }
  .flow-finder { padding: 22px; border-radius: 22px; }
  .finder-status { font-size: 9px; }
  .finder-scene { min-height: 220px; }
  .product-card { padding: 24px; }
  .article-card h3 { font-size: 20px; }
  .back-to-top { right: 16px; bottom: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal-pending { opacity: 1; transform: none; }
  .reveal-ready, .article-cover img, .btn, .product-card, .article-card { transition: none !important; }
  .article-card:hover .article-cover img { transform: none; }
}
/* Replace old load-time fades with visibility-triggered motion. */
.fade-in-up { opacity: 1; animation: none; }
@media (prefers-reduced-motion: no-preference) {
  .reveal-pending { opacity: 0; }
  .page-home .hero .fade-in-up { animation: hero-arrive .65s ease both; }
  @keyframes hero-arrive { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
}
.theme-options small { display: block; color: var(--nf-muted); font-size: 10px; }