/* Critical above-fold CSS — loaded render-blocking (small).
   Full styles.css is deferred and loads async. */

/* 1. Design Tokens */
:root {
  --color-mastery-blue: #1E3A5F;
  --color-signal-blue: #2563EB;
  --color-clarity-teal: #0D9488;
  --color-action-amber: #D97706;
  --color-ink: #1E293B;
  --color-slate: #475569;
  --color-stone: #94A3B8;
  --color-mist: #E2E8F0;
  --color-cloud: #F1F5F9;
  --color-white: #FFFFFF;
  --color-success: #059669;
  --color-warning: #D97706;
  --color-error: #DC2626;
  --color-info: #2563EB;
  --gradient-hero: linear-gradient(135deg, var(--color-mastery-blue), var(--color-clarity-teal));
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --text-display: 2.5rem;
  --text-h1: 2rem;
  --text-h2: 1.5rem;
  --text-h3: 1.25rem;
  --text-h4: 1.125rem;
  --text-body: 1rem;
  --text-body-sm: 0.875rem;
  --text-caption: 0.75rem;
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --leading-display: 1.2;
  --leading-h1: 1.25;
  --leading-h2: 1.3;
  --leading-h3: 1.4;
  --leading-h4: 1.4;
  --leading-body: 1.6;
  --leading-body-sm: 1.5;
  --leading-caption: 1.4;
  --tracking-display: -0.02em;
  --tracking-h1: -0.01em;
  --tracking-caption: 0.02em;
  --max-text-width: 680px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;
  --max-content-width: 1200px;
  --container-padding: var(--space-4);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --card-padding: var(--space-4);
  --card-border: 1px solid var(--color-mist);
  --card-radius: var(--radius-md);
  --card-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  --cta-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
  --focus-ring: 2px solid var(--color-signal-blue);
  --focus-offset: 2px;
  --touch-target-primary: 48px;
  --touch-target-default: 44px;
  --transition-micro: 200ms ease-out;
  --transition-layout: 300ms ease-in-out;
  --color-signal-blue-hover: #1D4ED8;
  --color-signal-blue-active: #1E40AF;
  --color-clarity-teal-hover: #0F766E;
  --color-clarity-teal-active: #115E59;
}

/* 2. Reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; -moz-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  min-height: 100vh;
  font-family: var(--font-family);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-body);
  color: var(--color-ink);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
input, button, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: none; }
a { color: var(--color-signal-blue); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; transition: color var(--transition-micro); }
a:hover { color: var(--color-signal-blue-hover); }
ul, ol { list-style: none; }
p, li, figcaption, blockquote { max-width: var(--max-text-width); }

/* 3. Typography */
.text-display { font-size: var(--text-display); font-weight: var(--weight-bold); line-height: var(--leading-display); letter-spacing: var(--tracking-display); color: var(--color-mastery-blue); }
h1, .text-h1 { font-size: var(--text-h1); font-weight: var(--weight-bold); line-height: var(--leading-h1); letter-spacing: var(--tracking-h1); color: var(--color-mastery-blue); }
h2, .text-h2 { font-size: var(--text-h2); font-weight: var(--weight-semibold); line-height: var(--leading-h2); color: var(--color-mastery-blue); }
h3, .text-h3 { font-size: var(--text-h3); font-weight: var(--weight-semibold); line-height: var(--leading-h3); color: var(--color-mastery-blue); }
h4, .text-h4 { font-size: var(--text-h4); font-weight: var(--weight-medium); line-height: var(--leading-h4); color: var(--color-mastery-blue); }
.text-body-sm, small { font-size: var(--text-body-sm); font-weight: var(--weight-regular); line-height: var(--leading-body-sm); color: var(--color-slate); }
.text-secondary { color: var(--color-slate); }
h1, h2, h3, h4 { margin-top: var(--space-12); margin-bottom: var(--space-4); }
h1:first-child, h2:first-child, h3:first-child, h4:first-child, .text-display:first-child { margin-top: 0; }
p + p { margin-top: var(--space-4); }

/* 4. Layout */
.container { width: 100%; max-width: var(--max-content-width); margin-inline: auto; padding-inline: var(--container-padding); }
.container--narrow { max-width: var(--max-text-width); }

/* 5. Buttons (hero CTA) */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: var(--touch-target-default); padding: var(--space-3) var(--space-6);
  font-family: var(--font-family); font-size: var(--text-body); font-weight: var(--weight-semibold); line-height: 1;
  text-decoration: none; border-radius: var(--card-radius); border: 2px solid transparent; cursor: pointer;
  transition: background-color var(--transition-micro), border-color var(--transition-micro), color var(--transition-micro), box-shadow var(--transition-micro), transform var(--transition-micro);
  user-select: none; white-space: nowrap;
}
.btn:focus-visible { outline: var(--focus-ring); outline-offset: var(--focus-offset); }
.btn--primary { background-color: var(--color-signal-blue); color: var(--color-white); border-color: var(--color-signal-blue); box-shadow: var(--cta-shadow); min-height: var(--touch-target-primary); padding: var(--space-4) var(--space-8); }
.btn--primary:hover { background-color: var(--color-signal-blue-hover); border-color: var(--color-signal-blue-hover); color: var(--color-white); }
.btn--secondary { background-color: transparent; color: var(--color-signal-blue); border-color: var(--color-signal-blue); }
.btn--secondary:hover { background-color: var(--color-signal-blue); color: var(--color-white); }
@media (max-width: 767px) { .btn--full-mobile { width: 100%; } }

/* 6. Skip-nav & Visually hidden */
.skip-nav { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; z-index: 1001; background: var(--color-white); color: var(--color-mastery-blue); padding: var(--space-3) var(--space-6); font-weight: var(--weight-semibold); text-decoration: none; border-radius: 0 0 var(--card-radius) 0; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15); }
.skip-nav:focus { position: fixed; left: 0; top: 0; width: auto; height: auto; clip: auto; outline: var(--focus-ring); outline-offset: var(--focus-offset); }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

/* 7. Sections */
.section { padding-block: var(--space-12); }
.section--sm { padding-block: var(--space-8); }
.section--lg { padding-block: var(--space-16); }
.section--alt { background-color: var(--color-cloud); }
.section__header { text-align: center; margin-bottom: var(--space-12); }
.section__header h2 { margin-top: 0; margin-bottom: var(--space-4); }
.section__header p { margin-inline: auto; color: var(--color-slate); }

/* 8. Hero */
.hero { background: var(--gradient-hero); color: var(--color-white); padding-block: var(--space-16); }
.hero__inner { text-align: center; }
.hero .text-display, .hero h1 { color: var(--color-white); }
.hero p { color: rgba(255, 255, 255, 0.9); margin-inline: auto; }
.hero__actions { display: flex; flex-direction: column; align-items: center; gap: var(--space-3); margin-top: var(--space-8); }
.hero__secondary-link { color: rgba(255, 255, 255, 0.9); font-size: var(--text-body-sm); text-decoration: underline; text-underline-offset: 3px; }
.hero__secondary-link:hover { color: var(--color-white); }

/* 9. Header */
.header { position: sticky; top: 0; z-index: 100; background-color: var(--color-white); border-bottom: 1px solid var(--color-mist); transition: box-shadow var(--transition-micro), padding var(--transition-micro); }
.header--scrolled { box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08); }
.header__inner { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: var(--space-4); }
.header__logo { font-size: var(--text-h4); font-weight: var(--weight-bold); color: var(--color-mastery-blue); text-decoration: none; white-space: nowrap; flex-shrink: 0; }
.header__logo:hover { color: var(--color-mastery-blue); }
.header__logo-full { display: none; }
.header__logo-compact { display: inline; }
.header__nav { display: none; }
.header__nav--open { display: block; position: absolute; top: 100%; left: 0; right: 0; background-color: var(--color-white); border-bottom: 1px solid var(--color-mist); box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1); padding: var(--space-4); }
.nav__list { display: flex; flex-direction: column; gap: var(--space-2); }
.nav__link { display: flex; align-items: center; padding: var(--space-3) var(--space-4); font-size: var(--text-body); font-weight: var(--weight-medium); color: var(--color-ink); text-decoration: none; border-radius: var(--card-radius); min-height: var(--touch-target-default); transition: color var(--transition-micro), background-color var(--transition-micro); }
.nav__link:hover { color: var(--color-signal-blue); background-color: var(--color-cloud); }
.nav__link--active { color: var(--color-signal-blue); font-weight: var(--weight-semibold); border-bottom: 2px solid var(--color-signal-blue); }
.header__cta { flex-shrink: 0; font-size: var(--text-body-sm); padding: var(--space-2) var(--space-4); min-height: 40px; }
.header__menu-btn { display: flex; align-items: center; justify-content: center; width: var(--touch-target-primary); height: var(--touch-target-primary); padding: var(--space-2); flex-shrink: 0; }
.header__menu-icon { display: block; width: 24px; height: 2px; background-color: var(--color-ink); position: relative; transition: background-color var(--transition-micro); }
.header__menu-icon::before, .header__menu-icon::after { content: ""; display: block; width: 24px; height: 2px; background-color: var(--color-ink); position: absolute; left: 0; transition: transform var(--transition-micro); }
.header__menu-icon::before { top: -7px; }
.header__menu-icon::after { top: 7px; }
.header__menu-btn[aria-expanded="true"] .header__menu-icon { background-color: transparent; }
.header__menu-btn[aria-expanded="true"] .header__menu-icon::before { top: 0; transform: rotate(45deg); }
.header__menu-btn[aria-expanded="true"] .header__menu-icon::after { top: 0; transform: rotate(-45deg); }

/* 10. Cards */
.card { background-color: var(--color-white); border: var(--card-border); border-radius: var(--card-radius); padding: var(--card-padding); box-shadow: var(--card-shadow); transition: border-color var(--transition-micro), box-shadow var(--transition-micro); }
.card:hover { border-color: var(--color-stone); box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08); }
.card__title { font-size: var(--text-h3); font-weight: var(--weight-semibold); line-height: var(--leading-h3); color: var(--color-mastery-blue); margin-bottom: var(--space-2); }
.card__body { font-size: var(--text-body); line-height: var(--leading-body); color: var(--color-ink); }
.card__footer { margin-top: var(--space-4); display: flex; align-items: center; gap: var(--space-3); }
.section--alt .card { background-color: var(--color-white); }

/* 11. Badges */
.badge { display: inline-flex; align-items: center; gap: var(--space-1); padding: var(--space-1) var(--space-3); font-size: var(--text-caption); font-weight: var(--weight-medium); line-height: var(--leading-caption); letter-spacing: var(--tracking-caption); text-transform: uppercase; border-radius: 9999px; white-space: nowrap; }
.badge--default { background-color: var(--color-cloud); color: var(--color-slate); }
.badge--primary { background-color: var(--color-signal-blue); color: var(--color-white); }
.badge--teal { background-color: var(--color-clarity-teal); color: var(--color-white); }
.badge--outline { background-color: transparent; border: 1px solid var(--color-mist); color: var(--color-slate); }

/* 12. Grid system */
.grid { display: grid; gap: var(--space-6); }
.grid--cols-2, .grid--cols-3, .grid--cols-4 { grid-template-columns: 1fr; }

/* 13. Homepage components */
.hero__subtitle { font-size: var(--text-h4); font-weight: var(--weight-regular); max-width: 600px; margin-top: var(--space-4); }
.hero__trust { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-4); margin-top: var(--space-8); }
.hero__trust-badge { display: inline-flex; align-items: center; gap: var(--space-2); font-size: var(--text-body-sm); font-weight: var(--weight-medium); color: rgba(255, 255, 255, 0.85); background: rgba(255, 255, 255, 0.1); padding: var(--space-2) var(--space-4); border-radius: 9999px; border: 1px solid rgba(255, 255, 255, 0.2); }
.hero__trust-badge svg { flex-shrink: 0; }
.card__icon { color: var(--color-clarity-teal); margin-bottom: var(--space-4); }
.card__icon svg { display: inline-block; }
.callout { background-color: var(--color-cloud); border-left: 3px solid var(--color-action-amber); padding: var(--space-6); border-radius: var(--card-radius); }
.callout__title { font-size: var(--text-h4); font-weight: var(--weight-semibold); color: var(--color-mastery-blue); margin-bottom: var(--space-2); margin-top: 0; }
.stat-highlight { padding: var(--space-8); }
.stat-highlight__number { display: block; font-size: 3rem; font-weight: var(--weight-bold); color: var(--color-signal-blue); line-height: 1; }
.stat-highlight__label { display: block; font-size: var(--text-h3); font-weight: var(--weight-semibold); color: var(--color-mastery-blue); margin-top: var(--space-2); }
.stat-highlight__detail { font-size: var(--text-body-sm); color: var(--color-slate); margin-top: var(--space-2); }

/* 14. Trust signals */
.trust-strip { background-color: var(--color-cloud); border-top: 1px solid var(--color-mist); border-bottom: 1px solid var(--color-mist); padding-block: var(--space-4); }
.trust-strip__list { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-6); }
.trust-strip__item { display: flex; align-items: center; gap: var(--space-2); }
.trust-strip__icon { color: var(--color-signal-blue); flex-shrink: 0; }
.trust-strip__text { font-size: var(--text-body-sm); font-weight: var(--weight-medium); color: var(--color-slate); }
.hero + .trust-strip { border-top: none; }
.trust-block__grid { display: grid; grid-template-columns: 1fr; gap: var(--space-6); }
.trust-block__card { padding: var(--space-8); background-color: var(--color-white); border: 1px solid var(--color-mist); border-radius: var(--card-radius); text-align: center; }
.trust-block__card-icon { color: var(--color-clarity-teal); margin-bottom: var(--space-4); display: flex; justify-content: center; }
.trust-block__card-title { font-size: var(--text-h4); font-weight: var(--weight-semibold); color: var(--color-mastery-blue); margin-bottom: var(--space-2); margin-top: 0; }
.trust-block__card-text { font-size: var(--text-body-sm); color: var(--color-slate); line-height: var(--leading-body); }

/* 15. Earn the Ask CTA */
.earn-the-ask--full { padding-block: var(--space-16); }
.earn-the-ask--full .earn-the-ask__inner { max-width: 720px; margin-inline: auto; display: flex; flex-direction: column; gap: var(--space-8); }
.earn-the-ask__heading { font-size: var(--text-h2); font-weight: var(--weight-bold); color: var(--color-mastery-blue); margin-top: 0; }
.earn-the-ask__text { font-size: var(--text-body); line-height: var(--leading-body); color: var(--color-ink); }
.earn-the-ask__price { padding: var(--space-4); background-color: var(--color-cloud); border-left: 3px solid var(--color-clarity-teal); border-radius: var(--card-radius); }
.section--alt .earn-the-ask__price { background-color: var(--color-white); }
.earn-the-ask__action { text-align: center; }
.earn-the-ask--compact { border-left: 3px solid var(--color-signal-blue); padding: var(--space-6); background-color: var(--color-cloud); border-radius: var(--card-radius); max-width: 480px; margin-inline: auto; }
.earn-the-ask--compact .earn-the-ask__inner { display: flex; flex-direction: column; gap: var(--space-3); }

/* 16. Footer */
.footer { background-color: var(--color-mastery-blue); color: var(--color-white); padding-top: var(--space-16); }
.footer a { color: rgba(255, 255, 255, 0.85); text-decoration: none; }
.footer a:hover { color: var(--color-white); }
.footer__grid { display: grid; grid-template-columns: 1fr; gap: var(--space-8); }
.footer__heading { font-size: var(--text-body-sm); font-weight: var(--weight-semibold); text-transform: uppercase; letter-spacing: var(--tracking-caption); color: rgba(255, 255, 255, 0.6); margin-bottom: var(--space-4); margin-top: 0; }
.footer__list { display: flex; flex-direction: column; gap: var(--space-3); }
.footer__link { color: rgba(255, 255, 255, 0.85); text-decoration: none; font-size: var(--text-body-sm); }
.footer__bottom { margin-top: var(--space-8); padding-block: var(--space-6); border-top: 1px solid rgba(255, 255, 255, 0.15); }
.footer__bottom-inner { display: flex; flex-direction: column; gap: var(--space-2); align-items: center; text-align: center; }
.footer__copyright { font-size: var(--text-body-sm); color: rgba(255, 255, 255, 0.6); }
.footer a.external-link::after { display: none; }

/* 17. GDPR Consent Banner */
.consent-banner { position: fixed; bottom: 0; left: 0; right: 0; z-index: 200; background-color: var(--color-white); border-top: 1px solid var(--color-mist); box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1); padding-block: var(--space-4); }
.consent-banner__inner { display: flex; flex-direction: column; gap: var(--space-4); align-items: flex-start; }
.consent-banner__text { font-size: var(--text-body-sm); color: var(--color-ink); line-height: var(--leading-body-sm); flex: 1; }
.consent-banner__actions { display: flex; gap: var(--space-2); flex-shrink: 0; }

/* 18. Responsive */
@media (min-width: 768px) {
  :root { --container-padding: var(--space-6); }
  .section { padding-block: var(--space-16); }
  .section--lg { padding-block: var(--space-24); }
  .hero { padding-block: var(--space-24); }
  .hero__actions { flex-direction: row; justify-content: center; gap: var(--space-4); }
  .header__logo-full { display: inline; }
  .header__logo-compact { display: none; }
  .header__nav { display: block; flex: 1; }
  .nav__list { flex-direction: row; justify-content: center; gap: var(--space-1); }
  .nav__link { padding: var(--space-2) var(--space-3); font-size: var(--text-body-sm); }
  .header__menu-btn { display: none; }
  .grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
  .grid--cols-3 { grid-template-columns: repeat(2, 1fr); }
  .grid--cols-4 { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__bottom-inner { flex-direction: row; justify-content: space-between; text-align: left; }
  .trust-block__grid { grid-template-columns: repeat(3, 1fr); }
  .consent-banner__inner { flex-direction: row; align-items: center; gap: var(--space-6); }
}
@media (min-width: 1280px) {
  :root { --container-padding: var(--space-8); }
  .text-display { font-size: 3rem; }
  h1, .text-h1 { font-size: 2.25rem; }
  h2, .text-h2 { font-size: 1.75rem; }
  .grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
  .grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
  .footer__grid { grid-template-columns: repeat(4, 1fr); }
}