/* ============================================================
   CardChoice International — Stylesheet
   Design system: tokens, base, layout, components
   ============================================================ */

/* ---------- 1. Design tokens ---------- */
:root {
  --color-primary: #0A2540;
  --color-primary-dark: #061829;
  --color-primary-light: #1B3A5C;
  --color-accent: #10B981;
  --color-accent-dark: #0E9F6E;
  --color-text: #1F2937;
  --color-text-muted: #6B7280;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F5F7FA;
  --color-border: #E5E7EB;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --fs-eyebrow: 0.875rem;
  --fs-body: 1rem;
  --fs-lead: 1.125rem;
  --fs-h3: 1.25rem;
  --fs-h2: 2rem;
  --fs-h1: 3rem;
  --fs-hero: 3.5rem;
  --lh-body: 1.6;
  --lh-tight: 1.2;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  --container-max: 1200px;
  --radius: 12px;
  --radius-sm: 6px;
  --shadow-card: 0 4px 12px rgba(10, 37, 64, 0.08);
  --shadow-card-hover: 0 12px 24px rgba(10, 37, 64, 0.12);

  --transition: 200ms ease;
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent-dark); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary); }

h1, h2, h3, h4 { margin: 0 0 var(--space-4); font-weight: 700; line-height: var(--lh-tight); color: var(--color-primary); }
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p { margin: 0 0 var(--space-4); }

ul, ol { margin: 0 0 var(--space-4); padding-left: var(--space-6); }
li { margin-bottom: var(--space-2); }

/* ---------- 3. Layout ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section { padding: var(--space-24) 0; }
.section--soft { background: var(--color-bg-soft); }
.section--dark { background: var(--color-primary); color: #fff; }
.section--dark h1, .section--dark h2, .section--dark h3 { color: #fff; }

.eyebrow {
  display: inline-block;
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

/* ---------- 4. Skip link & accessibility ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: var(--space-4);
  background: var(--color-accent);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  z-index: 1000;
}
.skip-link:focus { left: var(--space-4); }

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-block;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--fs-body);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
}
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-dark); color: #fff; transform: translateY(-1px); }

.btn--secondary { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn--secondary:hover { background: var(--color-primary); color: #fff; }

.btn--on-dark { background: #fff; color: var(--color-primary); }
.btn--on-dark:hover { background: var(--color-bg-soft); color: var(--color-primary); }

/* ---------- 6. Cards ---------- */
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}
.card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.card__media { aspect-ratio: 16 / 10; overflow: hidden; background: var(--color-bg-soft); }
.card__media img { width: 100%; height: 100%; object-fit: cover; }
.card__body { padding: var(--space-6); flex: 1; display: flex; flex-direction: column; }
.card__title { font-size: var(--fs-h3); margin-bottom: var(--space-2); }
.card__text { color: var(--color-text-muted); margin-bottom: var(--space-4); flex: 1; }
.card__link { font-weight: 600; color: var(--color-accent-dark); }
.card__link::after { content: ' \2192'; transition: transform var(--transition); display: inline-block; }
.card:hover .card__link::after { transform: translateX(4px); }

/* ---------- 7. Header & Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  max-width: var(--container-max);
  margin: 0 auto;
}
.site-logo img { height: 44px; width: auto; }

.site-nav { display: flex; align-items: center; gap: var(--space-6); }
.site-nav > ul {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-6);
}
.site-nav > ul > li { margin: 0; }
.site-nav a {
  color: var(--color-primary);
  font-weight: 500;
  font-size: 0.95rem;
}
.site-nav a:hover, .site-nav a.is-active { color: var(--color-accent-dark); }

.site-nav__cta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.site-nav__cta strong {
  color: var(--color-primary);
  font-size: 1.05rem;
  font-weight: 700;
}

/* Solutions dropdown */
.has-dropdown { position: relative; }
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 16px 32px rgba(10, 37, 64, 0.12);
  padding: var(--space-3);
  margin-top: var(--space-2);
  list-style: none;
  display: none;
  flex-direction: column;
  gap: 0;
}
/* Invisible bridge so cursor can cross from link to dropdown without losing hover */
.has-dropdown::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  height: var(--space-2);
  display: none;
}
.has-dropdown:hover::after,
.has-dropdown:focus-within::after { display: block; }
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown { display: flex; }
.dropdown li { margin: 0; }
.dropdown a {
  display: block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}
.dropdown a:hover { background: var(--color-bg-soft); }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 0;
  font-size: 1.5rem;
  color: var(--color-primary);
  cursor: pointer;
  padding: var(--space-2);
}

/* ---------- 8. Hero ---------- */
.hero {
  padding: var(--space-24) 0 var(--space-16);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.18), transparent 50%);
  pointer-events: none;
}
.hero__inner { position: relative; max-width: 800px; }
.hero__eyebrow { color: rgba(255, 255, 255, 0.8); }
.hero__title {
  color: #fff;
  font-size: var(--fs-hero);
  margin-bottom: var(--space-6);
}
.hero__lead {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--fs-lead);
  margin-bottom: var(--space-8);
}
.hero__actions { display: flex; gap: var(--space-4); flex-wrap: wrap; }

.page-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  padding: var(--space-16) 0 var(--space-12);
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 80% 20%, rgba(16, 185, 129, 0.15), transparent 50%);
  pointer-events: none;
}
.page-header > .container { position: relative; }
.page-header__title { color: #fff; font-size: var(--fs-h1); margin-bottom: var(--space-3); }
.page-header__lead { color: rgba(255, 255, 255, 0.85); font-size: var(--fs-lead); max-width: 720px; }

/* ---------- 9. Grids ---------- */
.grid { display: grid; gap: var(--space-6); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-12);
}
.pillar { text-align: center; }
.pillar__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-soft);
  border-radius: 50%;
}
.pillar__icon img { width: 48px; height: 48px; object-fit: contain; }
.pillar__title {
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: var(--space-3);
  font-weight: 700;
}

/* ---------- 10. Content layout ---------- */
.content-layout {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-12);
}
.content-body h2 { margin-top: var(--space-12); }
.content-body h2:first-child { margin-top: 0; }
.content-body h3 { color: var(--color-primary); margin-top: var(--space-8); font-size: 1.125rem; }

.sidebar-card {
  background: var(--color-bg-soft);
  border-radius: var(--radius);
  padding: var(--space-6);
  position: sticky;
  top: 100px;
}
.sidebar-card h3 { margin-top: 0; }

/* ---------- 11. Forms ---------- */
.form-field { margin-bottom: var(--space-4); }
.form-field label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-2);
  color: var(--color-primary);
}
.form-field input,
.form-field textarea {
  width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: var(--fs-body);
  background: #fff;
  transition: border-color var(--transition);
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}
.form-field textarea { resize: vertical; }

/* ---------- 12. CTA band ---------- */
.cta-band {
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-16) 0;
  text-align: center;
}
.cta-band h2 { color: #fff; margin-bottom: var(--space-4); }
.cta-band__lead { color: rgba(255, 255, 255, 0.85); font-size: var(--fs-lead); margin-bottom: var(--space-8); }
.cta-band__actions { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; }

/* ---------- 13. Footer ---------- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-16) 0 var(--space-8);
}
.site-footer h4 {
  color: #fff;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-4);
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: var(--space-2); }
.site-footer a { color: rgba(255, 255, 255, 0.7); }
.site-footer a:hover { color: #fff; }

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}
.footer-brand img { width: 140px; margin-bottom: var(--space-4); filter: brightness(0) invert(1); }
.footer-brand p { font-size: 0.95rem; margin-bottom: var(--space-6); }
.footer-contact { font-size: 0.9rem; line-height: 1.7; }
.footer-contact strong { color: #fff; display: block; margin-top: var(--space-2); }
.footer-contact strong:first-child { margin-top: 0; }

.footer-social { display: flex; gap: var(--space-3); margin-top: var(--space-6); }
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.footer-social a:hover { background: var(--color-accent); }
.footer-social img { width: 18px; height: 18px; filter: brightness(0) invert(1); }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-6);
  text-align: center;
  font-size: 0.825rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
}

/* ---------- 14. Utility ---------- */
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mt-12 { margin-top: var(--space-12); }
.mb-12 { margin-bottom: var(--space-12); }
.max-w-prose { max-width: 720px; }
.full-width-btn { display: block; text-align: center; }

/* ---------- 15. Mobile ---------- */
@media (max-width: 768px) {
  :root {
    --fs-hero: 2.25rem;
    --fs-h1: 2rem;
    --fs-h2: 1.5rem;
    --space-24: 3rem;
    --space-16: 2.5rem;
  }

  .site-header__inner { padding: var(--space-3) var(--space-4); }
  .site-logo img { height: 36px; }

  .site-nav {
    position: fixed;
    inset: 64px 0 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-6);
    transform: translateX(100%);
    transition: transform var(--transition);
    border-top: 1px solid var(--color-border);
    overflow-y: auto;
  }
  .site-nav.is-open { transform: translateX(0); }
  .site-nav > ul { flex-direction: column; gap: var(--space-4); width: 100%; }
  .site-nav__cta { display: none; }

  .nav-toggle { display: block; }

  .dropdown {
    position: static;
    box-shadow: none;
    padding: 0 0 0 var(--space-4);
    border-left: 2px solid var(--color-border);
    margin-top: var(--space-2);
    display: none;
    border-radius: 0;
  }
  .has-dropdown.is-open .dropdown { display: flex; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .pillars { grid-template-columns: 1fr; gap: var(--space-8); }
  .content-layout { grid-template-columns: 1fr; }
  .sidebar-card { position: static; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .hero__actions { flex-direction: column; align-items: stretch; }
  .hero__actions .btn { text-align: center; }
}