/* ============================================
   TOS Network - Responsive Styles
   Mobile-first responsive design
   ============================================ */

/* ============ Small Devices (Phones, <576px) ============ */

@media (max-width: 575px) {
  /* Typography */
  :root {
    --font-size-6xl: 2.5rem;    /* 40px */
    --font-size-5xl: 2rem;      /* 32px */
    --font-size-4xl: 1.75rem;   /* 28px */
    --font-size-3xl: 1.5rem;    /* 24px */
  }

  /* Container */
  .container {
    padding: 0 var(--spacing-md);
  }

  /* Hero Section */
  .hero {
    min-height: auto;
    padding: calc(var(--navbar-height-mobile) + var(--spacing-3xl)) var(--spacing-md) var(--spacing-3xl);
  }

  .hero-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
  }

  .hero-title br {
    display: none;
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xl);
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

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

  /* Features Grid */
  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .feature-card {
    padding: var(--spacing-lg);
  }

  .card-icon {
    width: 48px;
    height: 48px;
  }

  .card-title {
    font-size: var(--font-size-lg);
  }

  .card-description {
    font-size: var(--font-size-sm);
  }

  /* Section Spacing */
  .features,
  .docs-section,
  .whitepaper-section,
  .faq-section {
    padding: var(--spacing-3xl) 0;
  }

  .section-header {
    margin-bottom: var(--spacing-2xl);
  }

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

  .section-subtitle {
    font-size: var(--font-size-base);
  }

  /* Docs/Whitepaper Cards */
  .docs-card,
  .whitepaper-card {
    padding: var(--spacing-xl);
  }

  .docs-title,
  .whitepaper-title {
    font-size: var(--font-size-2xl);
  }

  .docs-description,
  .whitepaper-description {
    font-size: var(--font-size-base);
  }

  .docs-links,
  .whitepaper-links {
    flex-direction: column;
  }

  .docs-link,
  .whitepaper-link {
    width: 100%;
    justify-content: space-between;
  }

  /* FAQ */
  .faq-question {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
  }

  .faq-answer-content {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
  }

  /* Footer */
  .footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
  }
}

/* ============ Navigation Mobile Styles (All Screens) ============ */

@media (max-width: 991px) {
  /* Navbar */
  .navbar {
    height: var(--navbar-height-mobile);
  }

  .navbar-content {
    height: var(--navbar-height-mobile);
  }

  /* Mobile Menu Toggle */
  .mobile-toggle {
    display: flex;
  }

  /* Hide Desktop Menu */
  .navbar-menu {
    position: fixed;
    top: var(--navbar-height-mobile);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--navbar-height-mobile));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--spacing-lg);
    background: rgba(15, 20, 25, 0.98);
    backdrop-filter: blur(var(--blur-2xl));
    border-top: 1px solid var(--border-primary);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-100%);
    transition: all var(--transition-base);
    overflow-y: auto;
  }

  .navbar-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
  }

  .navbar-item {
    height: auto;
    border-bottom: 1px solid var(--border-secondary);
  }

  .navbar-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) 0;
    font-size: var(--font-size-base);
  }

  /* Mobile Dropdown */
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    background: rgba(255, 255, 255, 0.03);
    border: none;
    box-shadow: none;
    margin-top: var(--spacing-sm);
    display: none;
  }

  .has-dropdown.active .dropdown-menu {
    display: block;
  }

  .dropdown-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
  }

  /* Prevent body scroll when menu is open */
  body.menu-open {
    overflow: hidden;
  }
}

/* ============ Medium Devices (Tablets, 576px - 767px) ============ */

@media (min-width: 576px) and (max-width: 767px) {
  /* Hero */
  .hero-title {
    font-size: var(--font-size-5xl);
  }

  .hero-subtitle {
    font-size: var(--font-size-lg);
  }

  .hero-actions {
    flex-direction: row;
    justify-content: center;
  }

  .hero-actions .btn {
    width: auto;
  }

  /* Features Grid */
  .features-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
  }

  /* Footer */
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-2xl);
  }
}

/* ============ Large Devices (Desktops, 768px - 991px) ============ */

@media (min-width: 768px) and (max-width: 991px) {
  /* Hero */
  .hero-title {
    font-size: var(--font-size-5xl);
  }

  /* Features Grid */
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
  }

  /* Footer */
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ============ Extra Large Devices (Large Desktops, 992px - 1199px) ============ */

@media (min-width: 992px) and (max-width: 1199px) {
  /* Features Grid */
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Footer */
  .footer-content {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============ XXL Devices (Larger Desktops, ≥1200px) ============ */

@media (min-width: 1200px) {
  /* Container */
  .container {
    max-width: 1280px;
  }

  /* Hero */
  .hero-title {
    font-size: var(--font-size-6xl);
  }

  /* Features Grid */
  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Footer */
  .footer-content {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============ Ultra Wide Screens (≥1536px) ============ */

@media (min-width: 1536px) {
  .container {
    max-width: 1400px;
  }

  .hero-title {
    font-size: var(--font-size-7xl);
  }
}

/* ============ Landscape Mobile Devices ============ */

@media (max-height: 600px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: calc(var(--navbar-height-mobile) + var(--spacing-2xl)) var(--spacing-md) var(--spacing-2xl);
  }

  .hero-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-sm);
  }

  .hero-subtitle {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
  }
}

/* ============ Touch Device Optimizations ============ */

@media (hover: none) and (pointer: coarse) {
  /* Increase touch target sizes */
  .btn {
    min-height: 44px;
    padding: 16px 32px;
  }

  .navbar-link,
  .dropdown-link {
    min-height: 44px;
    padding: var(--spacing-md);
  }

  .faq-question {
    min-height: 60px;
  }

  .social-link {
    width: 48px;
    height: 48px;
  }

  /* Remove hover effects on touch devices */
  .feature-card:hover {
    transform: none;
  }

  .feature-card:hover .card-icon {
    transform: none;
  }

  .social-link:hover {
    transform: none;
  }

  /* Add active states for touch */
  .btn:active {
    transform: scale(0.98);
  }

  .feature-card:active {
    transform: translateY(-4px);
  }
}

/* ============ High DPI Displays ============ */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Optimize for retina displays */
  img {
    image-rendering: -webkit-optimize-contrast;
  }
}

/* ============ Print Styles ============ */

@media print {
  /* Hide navigation and footer */
  .navbar,
  .footer,
  .hero-actions,
  .mobile-toggle {
    display: none !important;
  }

  /* Reset page backgrounds */
  body {
    background: white;
  }

  /* Optimize spacing */
  .hero,
  .features,
  .docs-section,
  .whitepaper-section,
  .faq-section {
    padding: var(--spacing-lg) 0;
  }

  /* Expand all FAQ items */
  .faq-answer {
    max-height: none !important;
  }

  /* Prevent page breaks inside cards */
  .feature-card,
  .docs-card,
  .whitepaper-card,
  .faq-item {
    page-break-inside: avoid;
  }
}

/* ============ Dark Mode Support (Future) ============ */

@media (prefers-color-scheme: dark) {
  /* Already using dark theme by default */
}

@media (prefers-color-scheme: light) {
  /* Can add light theme support here if needed */
}

/* ============ Reduced Motion ============ */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============ High Contrast Mode ============ */

@media (prefers-contrast: high) {
  /* Increase contrast for accessibility */
  .navbar,
  .feature-card,
  .docs-card,
  .whitepaper-card,
  .faq-item {
    border-width: 2px;
  }

  .btn {
    font-weight: var(--font-weight-bold);
  }
}

/* ============ Secure Badge Responsive Styles ============ */

/* Tablet and below */
@media (max-width: 991px) {
  .secure-badge {
    height: 60px;
  }
}

/* Mobile */
@media (max-width: 575px) {
  .secure-badge {
    height: 50px;
  }
}