:root {
  --color-primary: #1A237E;
  --color-correct: #2E7D32;
  --color-wrong: #C62828;
  --color-bg: #ffffff;
  --color-text: #1a1a2e;
  --font-body: 'Poppins', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

header.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid #eee;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
  text-decoration: none;
}

.logo-img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
}

nav.site-nav {
  display: flex;
  gap: 24px;
}

nav.site-nav a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
}

nav.site-nav a:hover {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-primary);
}

.hero {
  background: var(--color-primary);
  color: #fff;
  text-align: center;
  padding: 64px 24px;
}

.hero-logo {
  width: 72px;
  height: 72px;
  border-radius: 14px;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 2.25rem;
  margin-bottom: 12px;
}

.hero p.tagline {
  font-size: 1.1rem;
  margin-bottom: 24px;
  opacity: 0.9;
}

.badge-coming-soon {
  display: inline-block;
  background: #fff;
  color: var(--color-primary);
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 6px;
}

.features {
  display: flex;
  gap: 24px;
  padding: 48px 24px;
  max-width: 1000px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
}

.feature-card {
  flex: 1 1 260px;
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 24px;
  text-align: center;
}

.feature-card h3 {
  color: var(--color-primary);
  margin-bottom: 8px;
}

.about {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px 64px;
  text-align: center;
  color: #444;
}

.legal {
  max-width: 800px;
  margin: 0 auto;
  padding: 48px 24px;
}

.legal h1 {
  color: var(--color-primary);
  margin-bottom: 8px;
}

.legal .effective-date {
  color: #777;
  margin-bottom: 32px;
  font-size: 0.9rem;
}

.legal h2 {
  color: var(--color-primary);
  margin: 32px 0 12px;
  font-size: 1.3rem;
}

.legal p, .legal li {
  margin-bottom: 12px;
}

.legal ul {
  padding-left: 24px;
}

footer.site-footer {
  border-top: 1px solid #eee;
  padding: 32px 24px;
  text-align: center;
  color: #777;
  font-size: 0.9rem;
}

footer.site-footer a {
  color: var(--color-primary);
  text-decoration: none;
  margin: 0 8px;
}

@media (max-width: 640px) {
  nav.site-nav {
    position: absolute;
    top: 64px;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px 24px;
    border: 1px solid #eee;
    display: none;
    z-index: 10;
  }
  nav.site-nav.open {
    display: flex;
  }
  .nav-toggle {
    display: block;
  }
}