/* Responsive Design System */

/* Breakpoints */
:root {
  --breakpoint-xs: 480px;
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* Extra Small Devices (phones, 480px and down) */
@media (max-width: 480px) {
  :root {
    --text-5xl: 2.25rem;
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
    --space-24: 4rem;
    --space-20: 3rem;
    --space-16: 2.5rem;
  }

  .container {
    padding: 0 var(--space-4);
  }

  .hero {
    min-height: 80vh;
    padding: var(--space-20) 0 var(--space-16);
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }

  .hero-title {
    font-size: var(--text-4xl);
    line-height: 1.2;
  }

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

  .hero-buttons {
    flex-direction: column;
    gap: var(--space-3);
  }

  .hero-stats {
    justify-content: center;
    gap: var(--space-6);
  }

  .floating-card {
    display: none;
  }

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

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

  .features-grid {
    grid-template-columns: 1fr !important;
    gap: var(--space-6);
  }

  .feature-card {
    padding: var(--space-6);
  }

  .courses-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .course-card {
    padding: var(--space-6);
  }

  .course-card.featured {
    transform: none;
    border-color: var(--primary-color);
  }

  .course-card.featured:hover {
    transform: translateY(-4px);
  }

  .teachers-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .contact-form-container {
    padding: var(--space-6);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }

  .footer-links {
    grid-template-columns: 1fr !important;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .nav-actions .btn {
    display: none;
  }
}

/* Small Devices (landscape phones, 640px and down) */
@media (max-width: 640px) {
  .btn {
    padding: var(--space-1);
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-4);
  }

  .stat {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
  }

  .stat-number {
    margin-bottom: 0;
  }

  .hero-visual {
    margin: 40px auto !important;
  }

  .feature-icon {
    width: 60px;
    height: 60px;
  }

  .course-price {
    align-items: center;
    flex-direction: column;
    gap: 0;
  }

  .price-amount {
    font-size: var(--text-3xl);
  }

  .teacher-image img {
    height: 250px;
  }

  .testimonial-card {
    padding: var(--space-6);
  }

  .contact-item {
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }

  .social-links {
    justify-content: center;
  }
}

/* Medium Devices (tablets, 768px and down) */
@media (max-width: 768px) {
  .nav-list {
    flex-direction: column;
    gap: var(--space-6);
    text-align: center;
  }

  .nav-link {
    font-size: var(--text-lg);
    padding: var(--space-2) 0;
  }

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

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

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-10);
    text-align: center;
  }

  .hero-visual {
    order: -1;
  }

  .floating-card {
    position: static;
    display: inline-flex;
    margin: var(--space-4);
    animation: none;
  }

  .card-1,
  .card-2 {
    position: static;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }

  .courses-grid {
    display: flex;
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .course-card.featured {
    transform: none;
    order: -1;
  }

  .teachers-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .contact-info {
    text-align: center;
  }

  .contact-details {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
    max-width: 400px;
    margin: var(--space-8) auto 0;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-10);
    text-align: center;
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-8);
  }
}

/* Large Devices (desktops, 1024px and down) */
@media (max-width: 1024px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 400px;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-2xl);
    z-index: var(--z-modal);
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-toggle {
    display: flex;
    z-index: var(--z-tooltip);
  }
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
    text-align: center;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    max-width: 500px;
    margin: 0px auto;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .courses-grid {
    grid-template-columns: repeat(1, 1fr) !important;
  }

  .course-card.featured {
    grid-column: span 2;
    max-width: 100%;
    /* margin: 0 auto; */
  }

  .teachers-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .footer-content {
    grid-template-columns: 1fr 2fr;
    gap: var(--space-12);
  }

  .footer-links {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Extra Large Devices (large desktops, 1280px and up) */
@media (min-width: 1280px) {
  .container {
    max-width: 1280px;
  }

  .hero-title {
    font-size: var(--text-6xl);
  }

  .section-title {
    font-size: var(--text-5xl);
  }

  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .teachers-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* 2XL Devices (larger desktops, 1536px and up) */
@media (min-width: 1536px) {
  .container {
    max-width: 1536px;
  }

  .hero {
    padding: var(--space-24) 0;
  }

  .features,
  .courses,
  .teachers,
  .testimonials,
  .contact {
    padding: var(--space-24) 0;
  }
}

/* Print Styles */
@media print {
  .nav-toggle,
  .floating-card,
  .social-links,
  .contact-form-container {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: var(--space-8) 0;
  }

  .section-title,
  .hero-title {
    color: var(--dark-color) !important;
  }

  .btn {
    border: 2px solid var(--dark-color);
    color: var(--dark-color) !important;
    background: transparent !important;
  }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .hero-image img,
  .teacher-image img,
  .testimonial-author img {
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
  }
}

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

  .floating-card {
    animation: none;
  }

  .shape {
    animation: none;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --white: #1a1a1a;
    --gray-100: #2d2d2d;
    --gray-200: #404040;
    --gray-300: #525252;
    --gray-400: #737373;
    --gray-500: #a3a3a3;
    --gray-600: #d4d4d4;
    --gray-700: #e5e5e5;
    --gray-800: #f5f5f5;
    --gray-900: #ffffff;
    --dark-color: #ffffff;
    --light-color: #2d2d2d;
  }

  .hero-background {
    background: linear-gradient(135deg, #1a1a1a 0%, #2c2c2c 50%, #3d3d3d 100%);
  }

  .features,
  .testimonials {
    background: linear-gradient(135deg, #2d1b1b 0%, #2d2419 100%);
  }

  .courses {
    background: linear-gradient(135deg, #2d1b1b 0%, #2d2419 100%);
  }
}

/* Accessibility Improvements */
@media (prefers-contrast: high) {
  :root {
    --primary-color: #d32f2f;
    --secondary-color: #f57c00;
    --accent-color: #fbc02d;
  }

  .btn {
    border-width: 3px;
  }

  .nav-link::after {
    height: 3px;
  }

  .feature-card,
  .course-card,
  .teacher-card,
  .testimonial-card {
    border-width: 2px;
  }
}

/* Focus Styles for Keyboard Navigation */
@media (any-hover: none) {
  .btn:focus,
  .nav-link:focus,
  .social-link:focus,
  input:focus,
  select:focus,
  textarea:focus {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
  }
}