/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

/* Root variables */
:root {
  --primary-color: #0056b3;
  --primary-hover: #004494;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --warning-color: #ffc107;
  --danger-color: #dc3545;
  --light-color: #f8f9fa;
  --dark-color: #343a40;
  --text-color: #333333;
  --text-muted: #6c757d;
  --border-radius: 5px;
  --transition-speed: 0.3s;
  --box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* Base styles */
body {
  font-family: 'Roboto', sans-serif;
  color: var(--text-color);
  line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 1rem;
}

.display-4 {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.2;
}

.lead {
  font-size: 1.25rem;
  font-weight: 300;
}

/* Navigation */
.navbar {
  box-shadow: var(--box-shadow);
}

.navbar-dark {
  background-color: var(--dark-color) !important;
}

.nav-link {
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-speed);
}

.nav-link:hover,
.nav-item.active .nav-link {
  border-bottom-color: var(--primary-color);
}

/* Buttons */
.btn {
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  transition: transform var(--transition-speed), 
              box-shadow var(--transition-speed),
              background-color var(--transition-speed);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--box-shadow);
}

.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
}

/* Cards */
.card {
  border: none;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  transition: transform var(--transition-speed),
              box-shadow var(--transition-speed);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.card-img-top {
  border-top-left-radius: var(--border-radius);
  border-top-right-radius: var(--border-radius);
}

/* Hero Section */
.hero-section {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('/img/header/win.jpg') no-repeat;
  background-size: cover;
  background-position: center;
  color: white;
  padding: 8rem 0;
  margin-top: 56px;
  min-height: 500px;
  display: flex;
  align-items: center;
}

.hero-section .display-4,
.hero-section .lead {
  color: white;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

/* Page Headers */
.page-header {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://picsum.photos/1920/1080') center/cover;
  color: white;
  padding: 6rem 0;
  margin-top: 56px;
  text-align: center;
}

.page-header.education-header {
  background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://picsum.photos/1920/1080?random=1');
}

.page-header.tools-header {
  background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('/img/header/tools.jpg');
}

.page-header.blog-header {
  background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('/img/header/reading.jpg');
}

.page-header.pricing-header {
  background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://picsum.photos/1920/1080?random=4');
}

.page-header.contact-header {
  background-image: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('/img/header/contact.jpg');
}

.page-header h1,
.page-header .lead {
  color: white;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

/* Headers & Sections padding */
section {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.bg-light {
  padding-top: 7rem;
}

header {
  margin-top: 56px;
}

/* Features Section */
.features .card-body {
  padding: 2rem;
}

.features .fa-3x {
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

/* Blog Cards */
.blog-content .card {
  margin-bottom: 2rem;
}

.blog-content .card-title {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

/* Pricing Toggle */
.pricing-toggle {
  background: #f8f9fa;
  border-radius: 30px;
  padding: 4px;
  display: inline-flex;
  margin-bottom: 2rem;
}

.pricing-toggle label {
  padding: 8px 20px;
  margin: 0;
  cursor: pointer;
  border-radius: 25px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.pricing-toggle input[type="radio"] {
  display: none;
}

.pricing-toggle input[type="radio"]:checked + label {
  background: var(--primary-color);
  color: white;
}

.pricing-toggle label:hover:not(.active) {
  background: rgba(0, 86, 179, 0.1);
}

.pricing-savings {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(25, 135, 84, 0.1);
  color: #198754;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 500;
  margin-left: 1rem;
}

/* Price Display */
.original-price {
  text-decoration: line-through;
  color: #6c757d;
  font-size: 1rem;
  display: block;
  margin-bottom: 0.5rem;
}

.monthly-converted {
  font-size: 0.875rem;
  color: #198754;
  display: block;
  margin-top: 0.5rem;
}

.price-wrapper .display-4 {
  line-height: 1;
  margin-bottom: 0.25rem;
}

/* Footer */
footer {
  background-color: var(--dark-color);
  color: white;
  padding: 3rem 0;
}

footer hr {
  opacity: 0.1;
  border-color: #ffffff;
}

footer a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-speed);
}

footer a:hover {
  color: white;
  text-decoration: none;
}

.social-links a {
  font-size: 1.5rem;
  margin-right: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .display-4 {
    font-size: 2.5rem;
  }
  
  .navbar-nav {
    padding: 1rem 0;
  }
  
  .nav-link {
    padding: 0.5rem 0 !important;
  }
  
  .hero-section {
    padding: 6rem 0;
  }
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn 0.5s ease-out;
}

footer h5 {
  color: var(--light-color);
}

.error {
  list-style: none;
  padding: 0;
  margin: 0;
  color: #721c24;
  background-color: #f8d7da;
  border-color: #f5c6cb;
  border-radius: 0.25rem;
}

.error li {
  padding: 0.5rem;
  border-bottom: 1px solid #f5c6cb;
}

.error li:last-child {
  border-bottom: none;
}