/* ========================================
   COMPREHENSIVE RESPONSIVE FRAMEWORK
   Mobile-First Design System
======================================== */

/* Base Mobile Styles (Default - Mobile First) */
:root {
  /* Mobile typography scale */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  
  /* Mobile spacing */
  --spacing-1: 0.25rem;  /* 4px */
  --spacing-2: 0.5rem;   /* 8px */
  --spacing-3: 0.75rem;  /* 12px */
  --spacing-4: 1rem;     /* 16px */
  --spacing-5: 1.25rem;  /* 20px */
  --spacing-6: 1.5rem;   /* 24px */
  --spacing-8: 2rem;     /* 32px */
  --spacing-10: 2.5rem;  /* 40px */
  --spacing-12: 3rem;    /* 48px */
  
  /* Mobile container widths */
  --container-mobile: 100%;
  --container-tablet: 768px;
  --container-desktop: 1200px;
  --container-wide: 1400px;
  
  /* Mobile component sizes */
  --nav-height-mobile: 60px;
  --nav-height-desktop: 78px;
  --card-padding-mobile: 1rem;
  --card-padding-desktop: 1.5rem;
  --section-padding-mobile: 1.5rem;
  --section-padding-desktop: 3rem;
}

/* Mobile Base Styles */
* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Poppins', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  padding-top: var(--nav-height-mobile);
}

/* Typography - Mobile First */
h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

p { font-size: var(--font-size-base); }

/* Layout Containers */
.container {
  width: 100%;
  max-width: var(--container-mobile);
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.container-fluid {
  width: 100%;
  padding: 0 var(--spacing-4);
}

/* Grid System - Mobile First */
.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(var(--spacing-2) * -1);
}

.col {
  flex: 1 0 0%;
  padding: 0 var(--spacing-2);
}

.col-12 { flex: 0 0 100%; max-width: 100%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }

/* Cards */
.card {
  border-radius: 12px;
  padding: var(--card-padding-mobile);
  margin-bottom: var(--spacing-4);
  transition: all 0.3s ease;
}

/* Buttons */
.btn {
  padding: 0.75rem 1.5rem;
  font-size: var(--font-size-sm);
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: none;
  cursor: pointer;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: var(--font-size-base);
  border-radius: 10px;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-xs);
  border-radius: 6px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height-mobile);
  z-index: 1000;
  padding: 0 var(--spacing-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  font-size: var(--font-size-lg);
  font-weight: 700;
  text-decoration: none;
}

.nav-menu {
  display: none;
  position: fixed;
  top: var(--nav-height-mobile);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(18, 8, 82, 0.95);
  backdrop-filter: blur(12px);
  padding: var(--spacing-6);
  flex-direction: column;
  z-index: 999;
}

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

/* Mobile Navigation Menu */
.mobile-nav {
  display: none;
  position: fixed;
  top: var(--nav-height-mobile);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(18, 8, 82, 0.98);
  backdrop-filter: blur(20px);
  padding: var(--spacing-8) var(--spacing-4);
  flex-direction: column;
  z-index: 999;
  overflow-y: auto;
}

.mobile-nav.active {
  display: flex;
  animation: slideInFromTop 0.3s ease forwards;
}

@keyframes slideInFromTop {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.mobile-nav .nav-link {
  padding: var(--spacing-4) 0;
  font-size: var(--font-size-xl);
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin: 0;
}

.mobile-nav .nav-link:last-child {
  border-bottom: none;
}

.mobile-nav .nav-link.active {
  color: var(--cyan);
  background: rgba(10, 220, 170, 0.15);
  border-radius: 8px;
  margin: var(--spacing-1) 0;
}

.nav-link {
  padding: var(--spacing-3) 0;
  font-size: var(--font-size-lg);
  text-decoration: none;
  display: block;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Mobile Menu Toggle */
.menu-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text);
  transition: all 0.2s ease;
}

.menu-toggle:hover {
  color: var(--cyan);
  transform: scale(1.1);
}

.menu-toggle.active {
  color: var(--cyan);
}

/* Hero Section */
.hero {
  min-height: 60vh;
  padding: var(--section-padding-mobile) 0;
  display: flex;
  align-items: center;
  text-align: center;
}

.hero-content {
  padding: 0 var(--spacing-4);
}

.hero-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-4);
  line-height: 1.2;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-6);
  line-height: 1.5;
}

/* Sections */
.section {
  padding: var(--section-padding-mobile) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.section-title h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-3);
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-4);
}

/* Form Elements */
.form-control {
  width: 100%;
  padding: 0.75rem;
  font-size: var(--font-size-base);
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);
  color: white;
  margin-bottom: var(--spacing-4);
}

.form-control:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(10, 220, 170, 0.2);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-1 { margin-bottom: var(--spacing-1); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-5 { margin-bottom: var(--spacing-5); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.mt-1 { margin-top: var(--spacing-1); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-5 { margin-top: var(--spacing-5); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.p-1 { padding: var(--spacing-1); }
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-5 { padding: var(--spacing-5); }
.p-6 { padding: var(--spacing-6); }

/* Tablet Styles (768px and up) */
@media (min-width: 768px) {
  :root {
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3rem;
    --container-mobile: var(--container-tablet);
    --nav-height-mobile: var(--nav-height-desktop);
    --card-padding-mobile: var(--card-padding-desktop);
    --section-padding-mobile: var(--section-padding-desktop);
  }
  
  body {
    padding-top: var(--nav-height-desktop);
  }
  
  .container {
    max-width: var(--container-tablet);
    padding: 0 var(--spacing-6);
  }
  
  .container-fluid {
    padding: 0 var(--spacing-6);
  }
  
  .col-md-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
  .col-md-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
  .col-md-3 { flex: 0 0 25%; max-width: 25%; }
  .col-md-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
  .col-md-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
  .col-md-6 { flex: 0 0 50%; max-width: 50%; }
  .col-md-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
  .col-md-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
  .col-md-9 { flex: 0 0 75%; max-width: 75%; }
  .col-md-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
  .col-md-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
  .col-md-12 { flex: 0 0 100%; max-width: 100%; }
  
  .nav-menu {
    display: flex !important;
    position: static;
    flex-direction: row;
    background: none;
    backdrop-filter: none;
    padding: 0;
    margin: 0;
  }
  
  .nav-link {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-base);
    border-bottom: none;
    margin: 0 0.25rem;
  }
  
  .menu-toggle {
    display: none;
  }
  
  .mobile-nav {
    display: none !important;
  }
  
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-6);
  }
  
  .hero-title {
    font-size: var(--font-size-4xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-xl);
  }
}

/* Desktop Styles (1024px and up) */
@media (min-width: 1024px) {
  :root {
    --font-size-3xl: 3rem;
    --font-size-4xl: 3.5rem;
    --container-mobile: var(--container-desktop);
  }
  
  .container {
    max-width: var(--container-desktop);
    padding: 0 var(--spacing-8);
  }
  
  .container-fluid {
    padding: 0 var(--spacing-8);
  }
  
  .col-lg-1 { flex: 0 0 8.333333%; max-width: 8.333333%; }
  .col-lg-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
  .col-lg-3 { flex: 0 0 25%; max-width: 25%; }
  .col-lg-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
  .col-lg-5 { flex: 0 0 41.666667%; max-width: 41.666667%; }
  .col-lg-6 { flex: 0 0 50%; max-width: 50%; }
  .col-lg-7 { flex: 0 0 58.333333%; max-width: 58.333333%; }
  .col-lg-8 { flex: 0 0 66.666667%; max-width: 66.666667%; }
  .col-lg-9 { flex: 0 0 75%; max-width: 75%; }
  .col-lg-10 { flex: 0 0 83.333333%; max-width: 83.333333%; }
  .col-lg-11 { flex: 0 0 91.666667%; max-width: 91.666667%; }
  .col-lg-12 { flex: 0 0 100%; max-width: 100%; }
  
  .cards-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-8);
  }
  
  .section {
    padding: calc(var(--section-padding-desktop) * 1.2) 0;
  }
}

/* Large Desktop Styles (1400px and up) */
@media (min-width: 1400px) {
  :root {
    --container-mobile: var(--container-wide);
  }
  
  .container {
    max-width: var(--container-wide);
  }
  
  .cards-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Mobile-Specific Optimizations */
@media (max-width: 576px) {
  :root {
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.375rem;
    --spacing-4: 0.75rem;
    --spacing-6: 1rem;
  }
  
  .hero {
    min-height: 50vh;
    padding: var(--spacing-8) 0;
  }
  
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .section {
    padding: var(--spacing-8) 0;
  }
  
  .card {
    padding: var(--spacing-4);
    margin-bottom: var(--spacing-3);
  }
  
  .btn {
    width: 100%;
    margin-bottom: var(--spacing-2);
  }
  
  .btn + .btn {
    margin-left: 0;
    margin-top: var(--spacing-2);
  }
  
  .form-control {
    font-size: var(--font-size-sm);
    padding: 0.625rem;
  }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
  .btn, .card, .nav-link {
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .btn:hover {
    transform: none;
  }
  
  .card:hover {
    transform: none;
  }
}

/* High DPI/Retina Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  /* Sharper text rendering */
  body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  /* Dark mode specific styles if needed */
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .hero-slide {
    transition: none;
  }
  
  .reveal {
    transition: none;
  }
}

/* Print Styles */
@media print {
  .navbar, .wa-float, .back-to-top {
    display: none;
  }
  
  body {
    padding-top: 0;
  }
  
  .hero {
    min-height: auto;
    padding: 2rem 0;
  }
}