/* ==========================================================================
   responsive.css — adaptação para tablet e telemóvel
   ========================================================================== */

/* --------------------------------------------------------------------------
   Tablets (≤ 1024px)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  :root {
    --fs-3xl: 3rem;
    --fs-2xl: 2.3rem;
    --space-2xl: 5.5rem;
  }

  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero p.lead { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .phone-mockup-wrap { margin-top: var(--space-lg); }

  .pillars,
  .grid-3,
  .grid-4,
  .founders,
  .security-hero {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps { grid-template-columns: 1fr; }
  .steps::before { display: none; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   Menu mobile (≤ 880px)
   -------------------------------------------------------------------------- */
@media (max-width: 880px) {
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    inset: 0;
    left: auto;
    width: min(340px, 82%);
    background: var(--color-bg-alt);
    border-left: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 6rem 2rem 2rem;
    gap: var(--space-lg);
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.45s var(--ease), opacity 0.4s var(--ease), visibility 0.45s;
  }

  .main-nav.open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links {
    flex-direction: column;
    gap: var(--space-md);
    width: 100%;
  }

  .nav-links a {
    font-size: var(--fs-md);
  }

  .nav-cta {
    flex-direction: column;
    width: 100%;
  }

  .nav-cta .btn {
    width: 100%;
  }

  .nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(5, 9, 18, 0.6);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s var(--ease), visibility 0.4s;
    z-index: 999;
  }

  .nav-backdrop.open {
    opacity: 1;
    visibility: visible;
  }
}

/* --------------------------------------------------------------------------
   Telemóveis (≤ 640px)
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  :root {
    --fs-3xl: 2.3rem;
    --fs-2xl: 1.9rem;
    --fs-xl: 1.6rem;
    --space-2xl: 4rem;
    --space-xl: 3rem;
    --container-width: 100%;
  }

  section { padding: var(--space-xl) 0; }

  .container { padding: 0 1.15rem; }

  .hero { padding-top: 7.5rem; }

  .hero-stats {
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  .phone-mockup {
    width: 230px;
    height: 470px;
  }

  .pillars,
  .grid-3,
  .grid-4,
  .founders,
  .security-hero,
  .values-list,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .founder-card { padding: var(--space-md); }

  .hero-actions .btn,
  .store-buttons .store-btn {
    width: 100%;
  }

  .hero-actions,
  .store-buttons {
    flex-direction: column;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .cta-band {
    padding: var(--space-xl) var(--space-sm);
  }

  .legal-page { padding-top: 6.5rem; }
}