/* ============================================================
   Responsive Breakpoints - Mobile First Design
   ============================================================ */

/* Small devices (landscape phones, 576px and up) */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
    --font-size-2xl: 1.25rem;
  }

  .header__nav {
    display: none;
  }

  .header__search {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero__content {
    padding: var(--space-lg);
  }

  .hero__title {
    font-size: var(--font-size-3xl);
  }

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

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }

  .threat-panel {
    grid-template-columns: 1fr;
  }

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

  .page-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .section {
    padding: var(--space-2xl) 0;
  }

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

  .trust-banner {
    flex-direction: column;
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 769px) and (max-width: 1024px) {
  .header__nav {
    gap: var(--space-md);
  }

  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-layout {
    grid-template-columns: 1fr 250px;
  }
}

/* Large devices (desktops, 1024px and up) */
@media (min-width: 1025px) and (max-width: 1280px) {
  .tools-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

/* Mobile Navigation Overlay */
.mobile-nav {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg);
  z-index: var(--z-modal);
  padding: var(--space-xl);
  display: none;
  flex-direction: column;
  gap: var(--space-lg);
}

.mobile-nav--active {
  display: flex;
}

.mobile-nav__link {
  font-size: var(--font-size-lg);
  color: var(--text);
  padding: var(--space-md);
  border-bottom: 1px solid var(--border-color);
}

.mobile-nav__link:hover {
  color: var(--accent);
  text-decoration: none;
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .sidebar,
  .mobile-menu-btn {
    display: none;
  }

  body {
    background: #fff;
    color: #000;
  }

  .container {
    max-width: 100%;
  }
}