/* Core Aviator Training - Main Stylesheet */
/* Aviation-themed design with brand colors #0FABD7 and #037CC0 */

/* ============================================
   CSS VARIABLES & THEME SWITCHING
   ============================================ */
:root {
  /* Brand Colors */
  --primary-blue: #0FABD7;
  --dark-blue: #037CC0;
  --accent-blue: #0891B2;
  
  /* Light Mode Colors */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F0F9FF;
  --bg-tertiary: #E0F2FE;
  --text-primary: #1E293B;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --border-color: #CBD5E1;
  --shadow-color: rgba(0, 0, 0, 0.1);
  --overlay-bg: rgba(255, 255, 255, 0.95);
  
  /* Spacing & Typography */
  --max-width: 1280px;
  --header-height: 80px;
  --transition-speed: 0.3s;
  --transition-smooth: 0.5s;
  
  /* Aviation Elements */
  --propeller-color: var(--dark-blue);
  --cloud-color: rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] {
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --bg-tertiary: #334155;
  --text-primary: #F1F5F9;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --border-color: #475569;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --overlay-bg: rgba(15, 23, 42, 0.95);
  --cloud-color: rgba(203, 213, 225, 0.1);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition-smooth), color var(--transition-smooth);
  overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.1rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: color var(--transition-speed);
}

a:hover {
  color: var(--dark-blue);
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: var(--overlay-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: all var(--transition-speed);
}

.header.scrolled {
  box-shadow: 0 4px 6px var(--shadow-color);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo {
  height: 70px;
  width: auto;
  transition: transform var(--transition-speed);
}

.logo:hover {
  transform: scale(1.05) rotate(5deg);
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-menu li a {
  color: var(--text-primary);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  transition: all var(--transition-speed);
  position: relative;
}

.nav-menu li a::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary-blue);
  transition: width var(--transition-speed);
}

.nav-menu li a:hover::before,
.nav-menu li a.active::before {
  width: 80%;
}

.nav-menu li a:hover {
  color: var(--primary-blue);
  background: var(--bg-secondary);
}

/* Dark Mode Toggle */
.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  border-radius: 50%;
  width: 45px;
  height: 45px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-speed);
  color: var(--text-primary);
}

.theme-toggle:hover {
  background: var(--bg-secondary);
  border-color: var(--primary-blue);
  transform: rotate(180deg);
}

.theme-toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.hamburger span {
  display: block;
  width: 28px;
  height: 3px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-speed);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(15, 171, 215, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(3, 124, 192, 0.1) 0%, transparent 50%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  padding: 2rem;
  animation: fadeInUp 1s ease-out;
}

.hero-title {
  font-size: 4rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  animation: fadeInUp 1s ease-out 0.4s backwards;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 0.6s backwards;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 0.5rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-speed);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
  color: white;
  box-shadow: 0 4px 15px rgba(15, 171, 215, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(15, 171, 215, 0.4);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
  background: var(--primary-blue);
  color: white;
  transform: translateY(-3px);
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
  padding: 5rem 2rem;
  position: relative;
}

.section-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
  animation: fadeInUp 0.8s ease-out;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-blue), var(--dark-blue));
  border-radius: 2px;
}

.section-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
}

/* Alternating Section Backgrounds */
.section:nth-child(even) {
  background: var(--bg-secondary);
}

/* ============================================
   CARDS & GRID LAYOUTS
   ============================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  animation: fadeInUp 0.8s ease-out;
}

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  padding: 2rem;
  transition: all var(--transition-speed);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-blue), var(--dark-blue));
  transform: scaleX(0);
  transition: transform var(--transition-speed);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px var(--shadow-color);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary-blue), var(--dark-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.card-description {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 2rem 1.5rem;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  font-size: 1.2rem;
}

.footer-section p,
.footer-section a {
  color: var(--text-secondary);
  line-height: 2;
}

.footer-section a:hover {
  color: var(--primary-blue);
}

/* Social Media Icons */
.social-links {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 45px;
  height: 45px;
  background: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  transition: all var(--transition-speed);
  color: var(--text-primary);
}

.social-icon:hover {
  background: var(--primary-blue);
  border-color: var(--primary-blue);
  color: white;
  transform: translateY(-3px) rotate(10deg);
}

.social-icon svg {
  width: 22px;
  height: 22px;
}

/* Contact Info Images (Placeholder) */
.contact-image {
  max-width: 250px;
  height: auto;
  margin: 0.5rem 0;
  display: block;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 1.5rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ============================================
   AVIATION-THEMED ANIMATIONS
   ============================================ */

/* Propeller Animation */
@keyframes spinPropeller {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.propeller {
  animation: spinPropeller 2s linear infinite;
}

/* Cloud Float Animation */
@keyframes floatCloud {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

.cloud {
  animation: floatCloud 6s ease-in-out infinite;
}

/* Airflow Lines */
@keyframes airflow {
  0% { 
    transform: translateX(-100%);
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% { 
    transform: translateX(200%);
    opacity: 0;
  }
}

.airflow-line {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-blue), transparent);
  animation: airflow 3s ease-in-out infinite;
}

/* Fade In Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 1s ease-out;
}

.fade-in-up {
  animation: fadeInUp 1s ease-out;
}

.fade-in-down {
  animation: fadeInDown 1s ease-out;
}

/* Scroll-triggered animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   FORM STYLES
   ============================================ */
.form-container {
  max-width: 600px;
  margin: 0 auto;
  background: var(--bg-primary);
  padding: 2rem;
  border-radius: 1rem;
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 6px var(--shadow-color);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 0.5rem;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-speed);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(15, 171, 215, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* ============================================
   BLOG STYLES
   ============================================ */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.blog-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 1rem;
  overflow: hidden;
  transition: all var(--transition-speed);
}

.blog-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 12px 24px var(--shadow-color);
}

.blog-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
}

.blog-content {
  padding: 1.5rem;
}

.blog-date {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.blog-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.blog-excerpt {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  line-height: 1.7;
}

.blog-link {
  color: var(--primary-blue);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.blog-link:hover {
  gap: 0.75rem;
}

/* Blog Post Page */
.blog-post {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}

.blog-post-header {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 2px solid var(--border-color);
}

.blog-post-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.blog-post-meta {
  color: var(--text-muted);
  font-size: 1rem;
}

.blog-post-content {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

.blog-post-content h2 {
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.blog-post-content h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.blog-post-content ul,
.blog-post-content ol {
  margin: 1rem 0;
  padding-left: 2rem;
}

.blog-post-content li {
  margin-bottom: 0.5rem;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  /* Navigation */
  .hamburger {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    right: -100%;
    width: 280px;
    height: calc(100vh - var(--header-height));
    background: var(--overlay-bg);
    backdrop-filter: blur(10px);
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    gap: 1rem;
    border-left: 1px solid var(--border-color);
    transition: right var(--transition-speed);
    overflow-y: auto;
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-menu li {
    width: 100%;
  }
  
  .nav-menu li a {
    display: block;
    width: 100%;
    padding: 1rem;
  }
  
  /* Typography */
  h1 { font-size: 2.5rem; }
  h2 { font-size: 2rem; }
  h3 { font-size: 1.75rem; }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.2rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  /* Sections */
  .section {
    padding: 3rem 1rem;
  }
  
  /* Cards */
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
  }
  
  /* Footer */
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 0 1rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.hidden { display: none; }
.visible { display: block; }

/* Aviation decorative elements */
.aviation-accent {
  position: relative;
}

.aviation-accent::before {
  content: '✈';
  position: absolute;
  left: -30px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary-blue);
  font-size: 1.2rem;
}

/* Print Styles */
@media print {
  .header,
  .footer,
  .theme-toggle,
  .hamburger,
  .btn {
    display: none;
  }
  
  body {
    color: #000;
    background: #fff;
  }
}


/* Map Section Styles */
.map-section {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    margin-top: 2rem;
    align-items: start;
}

.map-info {
    background: var(--card-background);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.map-info h3 {
    color: var(--primary-blue);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.map-info p {
    margin: 0.5rem 0;
    color: var(--text-color);
}

@media (max-width: 768px) {
    .map-section {
        grid-template-columns: 1fr;
    }
}


/* Responsive adjustments for two-column image sections */
@media (max-width: 768px) {
    [style*="grid-template-columns: 1fr 1fr"] {
        grid-template-columns: 1fr !important;
    }
}