/*
 * LumoAI - Responsive Design
 * Mobile-First Responsive Breakpoints
 * © 2025 LumoAI
 */

/* ============================================
   BREAKPOINTS
   ============================================
   - Mobile: < 640px
   - Tablet: 640px - 1024px
   - Desktop: 1024px - 1280px
   - Large Desktop: > 1280px
   ============================================ */

/* ============================================
   TABLET (768px and below)
   ============================================ */
@media (max-width: 768px) {
  /* Typography Scaling */
  :root {
    --font-size-6xl: 3rem;      /* 48px */
    --font-size-5xl: 2.5rem;    /* 40px */
    --font-size-4xl: 2rem;      /* 32px */
    --font-size-3xl: 1.5rem;    /* 24px */
  }

  /* Spacing Adjustments */
  .container {
    padding-left: var(--spacing-lg);
    padding-right: var(--spacing-lg);
  }

  .section {
    padding: var(--spacing-4xl) 0;
  }

  .section-lg {
    padding: var(--spacing-5xl) 0;
  }

  /* Navigation */
  .navbar-menu {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--spacing-2xl);
    gap: var(--spacing-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    border-bottom: var(--border-width) solid var(--border-color);
    box-shadow: var(--shadow-xl);
    max-height: calc(100vh - 80px);
    overflow-y: auto;
  }

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

  .navbar-link {
    width: 100%;
    padding: var(--spacing-md);
    text-align: center;
  }

  .navbar-cta {
    margin-left: 0;
    width: 100%;
  }

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

  .mobile-menu-toggle {
    display: flex;
  }

  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
  }

  /* Hero Section */
  .hero {
    min-height: 90vh;
    padding-top: 100px;
  }

  .hero-content {
    padding: var(--spacing-xl);
  }

  .hero-title {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .hero-subtitle {
    font-size: clamp(1rem, 4vw, 1.25rem);
  }

  .hero-cta {
    flex-direction: column;
    gap: var(--spacing-md);
  }

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

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
  }

  .hero-stat-number {
    font-size: var(--font-size-4xl);
  }

  /* Grid Layouts */
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

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

  /* Cards */
  .card {
    padding: var(--spacing-xl);
  }

  .service-card {
    padding: var(--spacing-2xl);
  }

  /* Section Headers */
  .section-header {
    margin-bottom: var(--spacing-3xl);
  }

  .section-title {
    font-size: var(--font-size-4xl);
  }

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

  /* Buttons */
  .btn {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-sm);
  }

  .btn-lg {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-base);
  }

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

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

  /* Back to Top Button */
  .back-to-top {
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 45px;
    height: 45px;
  }
}

/* ============================================
   MOBILE (640px and below)
   ============================================ */
@media (max-width: 640px) {
  /* Typography Further Scaling */
  :root {
    --font-size-6xl: 2.5rem;    /* 40px */
    --font-size-5xl: 2rem;      /* 32px */
    --font-size-4xl: 1.75rem;   /* 28px */
    --font-size-3xl: 1.5rem;    /* 24px */
    --font-size-2xl: 1.25rem;   /* 20px */
  }

  /* Spacing */
  .container {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }

  .section {
    padding: var(--spacing-3xl) 0;
  }

  .section-lg {
    padding: var(--spacing-4xl) 0;
  }

  /* Navigation */
  .navbar-container {
    padding: var(--spacing-md) var(--spacing-lg);
  }

  .navbar-logo {
    font-size: var(--font-size-xl);
  }

  /* Hero */
  .hero-stats {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .hero-stat-number {
    font-size: var(--font-size-3xl);
  }

  /* Cards */
  .card {
    padding: var(--spacing-lg);
  }

  .service-card {
    padding: var(--spacing-xl);
  }

  .service-icon {
    width: 60px;
    height: 60px;
    font-size: var(--font-size-3xl);
  }

  /* Project Cards */
  .project-card-title {
    font-size: var(--font-size-xl);
  }

  /* Forms */
  .form-input,
  .form-textarea,
  .form-select {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
  }

  /* Grid Spacing */
  .grid {
    gap: var(--spacing-lg);
  }

  /* Back to Top */
  .back-to-top {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
  }
}

/* ============================================
   LARGE DESKTOP (1440px and above)
   ============================================ */
@media (min-width: 1440px) {
  /* Typography Enhancement */
  :root {
    --font-size-7xl: 5rem;      /* 80px */
    --font-size-6xl: 4rem;      /* 64px */
  }

  /* Container Max Width */
  .container {
    max-width: 1400px;
  }

  /* Hero */
  .hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
  }

  /* Section Spacing */
  .section-lg {
    padding: 12rem 0;
  }
}

/* ============================================
   LANDSCAPE MOBILE (Small Height)
   ============================================ */
@media (max-height: 600px) and (orientation: landscape) {
  .hero {
    min-height: auto;
    padding: var(--spacing-5xl) 0;
  }

  .section {
    padding: var(--spacing-3xl) 0;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  /* Hide non-essential elements */
  .navbar,
  .back-to-top,
  .mobile-menu-toggle,
  .language-switcher,
  .btn,
  .footer {
    display: none !important;
  }

  /* Adjust colors for print */
  body {
    background: white;
    color: black;
  }

  .card {
    border: 1px solid #ccc;
    background: white;
  }

  /* Page breaks */
  .section {
    page-break-inside: avoid;
  }

  /* Remove animations */
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* ============================================
   TOUCH DEVICE OPTIMIZATIONS
   ============================================ */
@media (hover: none) and (pointer: coarse) {
  /* Larger touch targets */
  .btn {
    min-height: 44px;
    min-width: 44px;
  }

  .navbar-link {
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  /* Disable hover effects on touch devices */
  .card:hover,
  .btn:hover,
  .navbar-link:hover {
    transform: none;
  }

  /* Active states instead of hover */
  .card:active {
    transform: scale(0.98);
  }

  .btn:active {
    transform: scale(0.95);
  }
}

/* ============================================
   HIGH RESOLUTION DISPLAYS (Retina)
   ============================================ */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Sharper borders */
  .card,
  .btn,
  .form-input {
    border-width: 0.5px;
  }
}

/* ============================================
   DARK MODE SUPPORT (System Preference)
   ============================================ */
@media (prefers-color-scheme: light) {
  /* This site is dark by default, but we can add light mode support if needed */
  /* Uncomment and customize if light mode is desired */
  /*
  :root {
    --color-bg-primary: #FFFFFF;
    --color-text-primary: #1A202C;
    --color-text-secondary: #4A5568;
  }
  */
}

/* ============================================
   ACCESSIBILITY - HIGH CONTRAST MODE
   ============================================ */
@media (prefers-contrast: high) {
  :root {
    --border-color: rgba(255, 255, 255, 0.3);
    --border-color-hover: rgba(255, 255, 255, 0.5);
  }

  .btn {
    border: 2px solid currentColor;
  }

  .card {
    border-width: 2px;
  }
}

/* ============================================
   UTILITY: HIDE/SHOW AT BREAKPOINTS
   ============================================ */
.hide-mobile {
  display: block;
}

.show-mobile {
  display: none;
}

@media (max-width: 768px) {
  .hide-mobile {
    display: none;
  }

  .show-mobile {
    display: block;
  }
}

.hide-tablet {
  display: block;
}

.show-tablet {
  display: none;
}

@media (min-width: 641px) and (max-width: 1024px) {
  .hide-tablet {
    display: none;
  }

  .show-tablet {
    display: block;
  }
}

.hide-desktop {
  display: block;
}

.show-desktop {
  display: none;
}

@media (min-width: 1025px) {
  .hide-desktop {
    display: none;
  }

  .show-desktop {
    display: block;
  }
}

/* ============================================
   CONTAINER QUERIES (Future-Proofing)
   ============================================ */
@supports (container-type: inline-size) {
  .responsive-container {
    container-type: inline-size;
  }

  @container (max-width: 600px) {
    .responsive-card {
      padding: var(--spacing-md);
    }
  }
}

/* ============================================
   SAFE AREA INSETS (For Notched Devices)
   ============================================ */
@supports (padding: env(safe-area-inset-top)) {
  .navbar {
    padding-top: env(safe-area-inset-top);
  }

  .footer {
    padding-bottom: calc(var(--spacing-xl) + env(safe-area-inset-bottom));
  }

  .back-to-top {
    bottom: calc(var(--spacing-xl) + env(safe-area-inset-bottom));
    right: calc(var(--spacing-xl) + env(safe-area-inset-right));
  }

  @media (max-width: 640px) {
    .back-to-top {
      bottom: calc(var(--spacing-md) + env(safe-area-inset-bottom));
      right: calc(var(--spacing-md) + env(safe-area-inset-right));
    }
  }
}