:root {
  /* PHASE 2 — BRAND COLOR ENFORCEMENT */
  --scanium-blue: #1f4bff; /* PRIMARY brand color */
  --scanium-yellow: #ffd400; /* ACCENT only (initials) */
  --text-primary: #050b18; /* Deep navy text */
  --text-muted: rgba(5, 11, 24, 0.7);
  --bg-primary: #f4f6fb; /* Light background */

  --font-family: "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --transition-default: 160ms ease;
}

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

body {
  margin: 0;
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--scanium-blue);
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  background-color: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(5, 11, 24, 0.08);
}

.header-content {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 0;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--scanium-blue);
}

/* PHASE 3 — RESPONSIVE FIX: LOGO (CRITICAL) */
/* WHY: Logo must remain secondary and never dominate the viewport. */
.brand__logo {
  max-height: 48px;
  max-width: 48px;
  width: auto;
  height: auto;
  object-fit: contain;
}

@media (max-width: 480px) {
  .brand__logo {
    max-height: 36px;
    max-width: 36px;
  }
}

.brand-name {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

main {
  min-height: calc(100vh - 120px);
  background: linear-gradient(180deg, rgba(31, 75, 255, 0.08), rgba(31, 75, 255, 0) 55%) var(--bg-primary);
  display: flex;
  align-items: center;
}

.hero {
  width: 100%;
  padding: clamp(48px, 10vh, 120px) 0;
}

.hero__content {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

/* PHASE 3 — HERO TYPOGRAPHY */
.hero__title {
  /* Fix: Use lower bound suitable for mobile to prevent overflow */
  font-size: clamp(2rem, 6vw, 3.5rem);
  line-height: 1.15;
  font-weight: 600;
  color: var(--scanium-blue);
  margin: 0;
}

.s-initial {
  color: var(--scanium-yellow);
  font-weight: 700;
}

.hero__description {
  margin: 32px auto 0;
  max-width: 48ch;
  color: var(--text-muted);
  font-size: clamp(1.05rem, 2.6vw, 1.3rem);
}

.hero__cta {
  margin-top: 40px;
  display: flex;
  justify-content: center;
}

.play-badge {
  display: inline-flex;
  padding: 6px 0;
  transition: opacity var(--transition-default);
}

.play-badge:hover,
.play-badge:focus-visible {
  opacity: 0.8;
}

/* PHASE 3 — GOOGLE PLAY BADGE (NON-NEGOTIABLE) */
.play-badge img {
  max-height: 48px;
  max-width: 180px;
  width: auto;
  height: auto;
}

@media (max-width: 480px) {
  .play-badge img {
    max-height: 44px;
    max-width: 160px;
  }
}

.site-footer {
  padding: 32px 0 40px;
  text-align: center;
  font-size: 0.95rem;
  color: var(--text-muted);
  background-color: rgba(255, 255, 255, 0.8);
  border-top: 1px solid rgba(5, 11, 24, 0.08);
}

.footer-links {
  margin-bottom: 12px;
}

.footer-links a {
  margin: 0 12px;
  color: var(--scanium-blue);
  transition: opacity var(--transition-default);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  opacity: 0.7;
}

@media (max-width: 640px) {
  .hero__description {
    margin-top: 24px;
  }

  .hero__cta {
    justify-content: center;
  }
}