@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@400;500;700&display=swap');

:root {
  /* Typography scale */
  --font-family: 'Exo 2', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.75rem;
  --font-size-hero: 3.5rem;
  --line-height-tight: 1.2;
  --line-height-base: 1.6;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;

  /* Color palette (CK33 variant) */
  --color-bg: #F0F6FF;          /* snow palace background (LIGHT) */
  --color-bg-alt: #E8F0FF;
  --color-bg-card: #FFFFFF;      /* white/dark card backgrounds */
  --color-primary: #1E3A8A;       /* deep navy */
  --color-accent: #1D83B8;        /* ice blue */
  --color-text: #0A1929;           /* body text (DARK on LIGHT) */
  --color-text-muted: #405070;     /* muted text (contrast ≥3:1 on white) */
  --color-text-on-primary: #FFFFFF; /* contrast on primary (dark primary -> white) */
  --color-border: #DDE6F8;
  --color-shadow: rgba(9, 20, 40, 0.25);

  /* Radius and shadows */
  --radius: 12px;
  --shadow-elev-1: 0 4px 6px rgba(0,0,0,.14);
  --shadow-elev-2: 0 10px 15px rgba(0,0,0,.18);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, video, iframe {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  padding: 0 1rem;
  margin: 0 auto;
  box-sizing: border-box;
  max-width: 100%;
}

.section {
  padding: 2rem 0;
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-elev-1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0,0,0,.25);
}

.card img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  /* Card image corners match the top corners of the card */
  border-top-left-radius: var(--radius);
  border-top-right-radius: var(--radius);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

.card-content {
  padding: 1rem;
  color: var(--color-text);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin: 0 0 0.5rem 0;
  color: var(--color-text);
}

.card p {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  margin: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  align-items: stretch;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  border: 1px solid transparent;
  background: rgba(0,0,0,0.0);
  color: var(--color-text-on-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  border: 1px solid rgba(255,255,255,0.8);
  box-shadow: 0 4px 8px rgba(0,0,0,.15);
}
.btn-primary:hover {
  filter: brightness(0.92);
}
.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn-secondary:hover {
  background: rgba(30,58,168,0.08);
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  min-height: 64px;
  overflow: visible;
  background: rgba(240,246,255,0.95);
  backdrop-filter: saturate(1.2) blur(2px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 1rem;
  justify-content: flex-start; /* mobile default */
  margin: 0 auto; /* center content at all breakpoints (see requirement) */
}

.site-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  overflow: hidden;
  max-height: 52px;
  flex-shrink: 0;
}

.site-logo img {
  height: 44px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  display: block;
}

.nav-toggle-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}

.nav-toggle-label {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  margin-left: auto;
  padding: 0.4rem 0.6rem;
  z-index: 200;
  border-radius: 6px;
  background: rgba(0,0,0,0.45);
  border: 1.5px solid rgba(255,255,255,0.7);
}
.nav-toggle-label span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
  border-radius: 2px;
  transition: all 0.2s ease;
}

.site-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  z-index: 500;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 4px 16px rgba(0,0,0,.18);
}
.site-nav .nav-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0.5rem 0;
  margin: 0;
  list-style: none;
}
.nav-list {
  display: flex;
  flex-direction: row;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-item {
  position: relative;
}
.nav-link {
  display: inline-block;
  font-size: var(--font-size-xs);
  color: var(--color-text);
  text-decoration: none;
  padding: 0.4rem 0.6rem;
  position: relative;
  transition: color 0.2s ease;
}
.nav-link:hover {
  color: var(--color-accent);
}
.nav-link:hover::after {
  width: 100%;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 2px;
  width: 0;
  background: var(--color-accent);
  transition: width 0.2s ease;
}
.nav-dropdown {
  position: relative;
}
.nav-dropdown-toggle {
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  z-index: 9999;
  list-style: none;
  margin: 0;
  padding: 0.5rem 0;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,.18);
  white-space: nowrap;
}
.nav-dropdown:hover > .nav-dropdown-menu,
.nav-dropdown:focus-within > .nav-dropdown-menu {
  display: block;
}
.nav-dropdown-menu .nav-link {
  display: block;
  padding: 0.5rem 1.25rem;
  width: 100%;
  border-bottom: none;
}
.nav-dropdown-menu .nav-link:hover {
  background: var(--color-bg-alt);
}
@media (max-width: 767px) {
  .nav-dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    padding-left: 1rem;
  }
  .nav-dropdown:focus-within > .nav-dropdown-menu {
    display: block;
  }
  .nav-list {
    flex-direction: column;
  }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
  }
  .nav-toggle-label {
    display: flex;
  }
  .nav-toggle-input:checked ~ .site-nav {
    display: block;
  }
  .nav-link {
    display: block;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
  }
  .site-header .container {
    padding: 0.5rem 1rem;
  }
  .hero { min-height: 50vh; padding: 2rem 1rem; }
  .hero h1 { font-size: var(--font-size-2xl); }
  .card-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  table { width: 100%; display: block; overflow-x: auto; }
}

@media (min-width: 768px) {
  /* Tablet layout: logo-left header, nav centered, horizontal nav */
  .container {
    max-width: 960px;
  }
  /* NAV LAYOUT — logo-left, nav-centered */
  .site-header .container {
    justify-content: flex-start;
  }
  .site-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
  }
  .nav-list {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
  }
  .nav-toggle-label {
    display: none !important;
  }
  .nav-link {
    font-size: var(--font-size-sm);
  }
  /* ensure container centers on tablet/mobile centers as required */
  .container {
    margin: 0 auto;
  }
  .hero { min-height: 60vh; }
  .hero h1 { font-size: var(--font-size-hero); }
  .card-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
  .footer-inner { flex-direction: row; text-align: left; }
  /* Dropdown behavior for tablet/desktop remains absolute with hover/focus as defined above */
}

@media (min-width: 1024px) {
  .container {
    max-width: 1200px;
    padding: 0 2rem;
  }
  .hero { min-height: 70vh; }
  .hero h1 { font-size: var(--font-size-hero); }
  .section { padding: 4rem 0; }
}

/* Hero layout extras (EXACTLY as requested) */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 1rem;
  color: #fff;
  background: linear-gradient(135deg, rgba(14,24,54,1) 0%, rgba(30,58,138,1) 60%, rgba(29,131,184,1) 100%), linear-gradient(#0b1020, #0b1020);
  /* Fallback if images fail: solid brand color */
  background-color: #1E3A8A;
  position: relative;
  overflow: hidden;
}
.hero-banner { width: 100%; overflow: hidden; max-height: 360px; }
.hero-banner-img { width: 100%; height: 360px; object-fit: cover; display: block; }
.hero-text-card {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  text-align: center;
  max-width: 700px;
  margin: -3.5rem auto 0;
  position: relative;
  z-index: 2;
  box-shadow: 0 8px 32px rgba(0,0,0,.25);
}
.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
}
@media (max-width: 767px) {
  .hero-text-card {
    margin-top: -1.5rem;
    padding: 1.5rem;
  }
}
.hero h1 {
  font-weight: var(--font-weight-bold);
  margin: 0 0 0.5rem 0;
  color: #fff;
}
.hero p {
  color: rgba(255,255,255,0.95);
}
.hero .cta-row { display:flex; gap:0.75rem; }

/* FAQ Accordion (CSS-only) */
.faq-section {
  padding: 2rem 0;
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  background: var(--color-bg-card);
  overflow: hidden;
  transition: all 0.2s ease;
}
.faq-item[open] {
  border-color: var(--color-primary);
  box-shadow: 0 2px 12px var(--color-shadow);
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-md);
  list-style: none;
  user-select: none;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
.faq-item[open] > .faq-question::after {
  content: "−";
}
.faq-answer {
  padding: 0 1.25rem 1.25rem;
  border-top: 1px solid var(--color-border);
}
.faq-answer p {
  margin: 0.75rem 0 0;
  color: var(--color-text-muted);
  line-height: var(--line-height-base);
}

/* Dropdown specifics for mobile vs desktop handled above; ensure accessibility */
@media (min-width: 768px) {
  .nav-dropdown-menu {
    position: absolute;
  }
}

/* Forms */
label { display: block; font-size: var(--font-size-sm); margin-bottom: 0.25rem; color: var(--color-text); }
input, textarea, select {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  width: 100%;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30,58,168,0.15);
}
button, input[type="submit"] {
  font-family: var(--font-family);
  cursor: pointer;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--color-border);
}
th, td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
}
th {
  text-align: left;
  font-weight: var(--font-weight-bold);
  color: var(--color-text-muted);
}
td { vertical-align: top; }

/* Utilities */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.hidden { display: none !important; }