/* ==========================================================================
   LearnBe - Learning Management System Custom Styles
   Author: Eovence
   Description: Custom CSS for the LearnBe Learning Management System
   Version: 1.0.0
   ========================================================================== */

/* ==========================================================================
   CSS TABLE OF CONTENTS

   1.  CSS Custom Properties (Variables)
   2.  Base Styles & Typography
   3.  Component Typography
   4.  Lazy Loading
   5.  Gradients & Backgrounds
   6.  Animations & Keyframes
   7.  Card & Component Styles
   8.  Button Styles
   9.  Navigation & Navbar
   10. Mega Menu System
   11. Slider & Carousel Components
   12. Rating & Interactive Elements
   13. Accessibility & Focus Management
   14. Custom Scrollbar
   15. Responsive Typography Utilities
   16. Layout & Spacing Utilities
   17. Print Styles
   18. Main Swiper
   19. Hero Slider System
   20. Responsive Design & Media Queries
   21. Performance & Accessibility Optimizations
   22. Facebook-Style Dropdown System
   23. Dropdown Animation Classes
   24. Mobile Responsive Adjustments

   ========================================================================== */

/* ==========================================================================
   1. CSS Custom Properties (Variables)
   ========================================================================== */
:root {
    /* Typography */
    --font-primary: 'Quicksand', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: var(--font-primary);

    /* Colors */
    --color-primary: #667eea;
    --color-primary-dark: #764ba2;
    --color-secondary: #f093fb;
    --color-secondary-dark: #f5576c;
    --color-success: #4facfe;
    --color-success-dark: #00f2fe;
    --color-warning: #fbbf24;

    /* Neutral Colors */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Z-Index Scale */
    --z-dropdown: 50;
    --z-modal: 60;
    --z-tooltip: 70;
    --z-toast: 80;

    /* Swiper Theme */
    --swiper-theme-color: #58e8fd;
}

/* ==========================================================================
   2. Base Styles & Typography
   ========================================================================== */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography Scale */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h1 {
    font-weight: 700;
    letter-spacing: -0.03em;
}

h2 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

a, button, select {
    cursor: pointer;
}

/* Typography Utilities */
.text-primary {
    font-family: var(--font-primary);
}

.text-heading {
    font-family: var(--font-heading);
}

.text-optimized {
    line-height: 1.7;
}

/* ==========================================================================
   3. Component Typography
   ========================================================================== */
.brand-text,
.logo-text {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
}

button,
.btn {
    font-family: var(--font-primary);
    font-weight: 500;
    letter-spacing: 0.01em;
}

nav a,
.nav-link {
    font-family: var(--font-primary);
    font-weight: 500;
    letter-spacing: 0.01em;
}

p,
li,
td,
th {
    font-family: var(--font-primary);
    line-height: 1.7;
}

.card-title,
.section-title {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.hero-title {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.hero-subtitle {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.6;
}

input,
textarea,
select,
label {
    font-family: var(--font-primary);
    font-weight: 400;
}

.price,
.stat-number {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.testimonial-text {
    font-family: var(--font-primary);
    font-style: italic;
    font-weight: 400;
    line-height: 1.7;
}

.testimonial-author {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: 0.01em;
}

footer {
    font-family: var(--font-primary);
    font-weight: 400;
}

/* ==========================================================================
   4. Lazy Loading
   ========================================================================== */
img:not([src]):not([srcset]) {
    visibility: hidden;
}

.lazyload {
    opacity: 0;
    transition: opacity 0.5s;
}

.lazyload.loaded {
    opacity: 1;
}

.lazyload-container .skeleton-shimmer {
    background: linear-gradient(90deg, #e5e7eb 0%, #f3f4f6 50%, #e5e7eb 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

.dark .lazyload-container .skeleton-shimmer {
    background: linear-gradient(90deg, #374151 0%, #4b5563 50%, #374151 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.lazyload-container.loaded .skeleton,
.lazyload-container.loaded > .skeleton-shimmer {
    display: none;
}

/* ==========================================================================
   5. Gradients & Backgrounds
   ========================================================================== */
.gradient-primary,
.bg-gradient-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.gradient-secondary,
.bg-gradient-secondary {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
}

.gradient-success,
.bg-gradient-success {
    background: linear-gradient(135deg, var(--color-success) 0%, var(--color-success-dark) 100%);
}

/* ==========================================================================
   6. Animations & Keyframes
   ========================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Animation Utilities */
.animate-fade-in {
    animation: fadeIn 0.6s ease-out;
}

.animate-fade-in-up {
    animation: fadeInUp 0.8s ease-out;
}

.animate-slide-down {
    animation: slideDown 0.3s ease-out;
}

/* ==========================================================================
   7. Card & Component Styles
   ========================================================================== */
.card-shadow {
    box-shadow: var(--shadow-md);
    transition: box-shadow var(--transition-normal);
}

.card-shadow:hover {
    box-shadow: var(--shadow-xl);
}

/* ==========================================================================
   8. Button Styles
   ========================================================================== */
.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    transition: all var(--transition-normal);
    color: #fff;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-secondary-dark) 100%);
    transition: all var(--transition-normal);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(240, 147, 251, 0.4);
}

/* ==========================================================================
   9. Navigation & Navbar
   ========================================================================== */
.navbar-blur {
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.dark .navbar-blur {
    backdrop-filter: blur(10px);
    background-color: rgba(17, 24, 39, 0.95);
}

/* ==========================================================================
   10. Mega Menu System
   ========================================================================== */
.mega-menu {
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.mega-menu-trigger {
    position: relative;
    margin-bottom: -1px;
}

.mega-menu-content {
    position: relative;
    z-index: var(--z-dropdown);
    margin-top: -1px;
    pointer-events: auto;
}

.mega-menu-content [x-show] {
    transition: all var(--transition-normal) ease-in-out;
}

/* ==========================================================================
   11. Slider & Carousel Components
   ========================================================================== */
.slider-container {
    position: relative;
    overflow: hidden;
}

.slider-track {
    transition: transform var(--transition-slow);
}

/* ==========================================================================
   12. Rating & Interactive Elements
   ========================================================================== */
.star-rating {
    color: var(--color-warning);
}

/* ==========================================================================
   13. Accessibility & Focus Management
   ========================================================================== */
.focus-visible:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ==========================================================================
   14. Custom Scrollbar
   ========================================================================== */
/* WebKit (Chrome, Edge, Safari) */
::-webkit-scrollbar {
  width: 8px;   /* vertical thickness */
  height: 8px;  /* horizontal thickness */
}

/* Orientation-specific to be explicit */
::-webkit-scrollbar:vertical { width: 8px; }
::-webkit-scrollbar:horizontal { height: 8px; }

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--color-gray-300);
  border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-gray-400);
}

/* Corner where both bars meet (useful on desktops) */
::-webkit-scrollbar-corner {
  background: var(--color-gray-100);
}

/* ==========================================================================
   15. Responsive Typography Utilities
   ========================================================================== */
.text-responsive {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
}

.text-responsive-lg {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
}

.text-responsive-xl {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

/* ==========================================================================
   16. Layout & Spacing Utilities
   ========================================================================== */
.section-padding {
    padding-top: var(--spacing-3xl);
    padding-bottom: var(--spacing-3xl);
}

@media (min-width: 768px) {
    .section-padding {
        padding-top: var(--spacing-4xl);
        padding-bottom: var(--spacing-4xl);
    }
}

/* ==========================================================================
   17. Print Styles
   ========================================================================== */
@media print {
    .no-print {
        display: none !important;
    }
}

/* ==========================================================================
   18. Main Swiper
   ========================================================================== */

/* Swiper Navigation */
.main-swiper .swiper-slide {
    display: flex;
    height: auto;
}

.main-swiper .swiper-button-next,
.main-swiper .swiper-button-prev {
    width: 30px;
    height: 30px;
    color: #fff;
    background: #764ba2b5;
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
}

.main-swiper .swiper-button-next:hover,
.main-swiper .swiper-button-prev:hover {
    background: #764ba2;
}

.main-swiper .swiper-button-next::after,
.main-swiper .swiper-button-prev::after {
    font-size: 12px;
    font-weight: bold;
}

/* Swiper Pagination */
.main-swiper .swiper-pagination {

}

.main-swiper .swiper-pagination-bullet {
    width: 10px;
    height: 10px;
    background: #764ba2b5;
    opacity: 1;
    transition: all var(--transition-normal);
}

.main-swiper .swiper-pagination-bullet-active {
    background: #764ba2;
    transform: scale(1.2);
}

/* ==========================================================================
   19. Hero Slider System
   ========================================================================== */
.hero-swiper {
    position: relative;
    overflow: hidden;
}

.hero-swiper .swiper-slide {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 100vh;
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.hero-swiper .swiper-slide-active {
    opacity: 1;
}

.hero-swiper .swiper-slide-prev,
.hero-swiper .swiper-slide-next {
    opacity: 0.3;
}

/* Swiper Navigation */
.hero-swiper .swiper-button-next,
.hero-swiper .swiper-button-prev {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
}

.hero-swiper .swiper-button-next:hover,
.hero-swiper .swiper-button-prev:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.hero-swiper .swiper-button-next::after,
.hero-swiper .swiper-button-prev::after {
    font-size: 20px;
    font-weight: bold;
}

/* Swiper Pagination */
.hero-swiper .swiper-pagination {
    bottom: 30px;
}

.hero-swiper .swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 1;
    transition: all var(--transition-normal);
}

.hero-swiper .swiper-pagination-bullet-active {
    background: var(--color-white);
    transform: scale(1.2);
}

/* Progress Bar */
.hero-swiper .swiper-progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: rgba(255, 255, 255, 0.2);
    z-index: 10;
}

.hero-swiper .swiper-progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-dark));
    width: 0%;
    transition: width 5s linear;
}

/* Floating Action Buttons */
.hero-swiper .swiper-pause,
.hero-swiper .swiper-play {
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-normal);
}

.hero-swiper .swiper-pause:hover,
.hero-swiper .swiper-play:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* Enhanced Slide Content Animations */
.hero-swiper .swiper-slide-active .animate-fade-in-up {
    animation: fadeInUp 1s ease-out 0.3s both;
}

.hero-swiper .swiper-slide-active .animate-fade-in-up:nth-child(2) {
    animation-delay: 0.5s;
}

.hero-swiper .swiper-slide-active .animate-fade-in-up:nth-child(3) {
    animation-delay: 0.7s;
}

/* ==========================================================================
   20. Responsive Design & Media Queries
   ========================================================================== */
@media (max-width: 768px) {
    .hero-swiper .swiper-button-next,
    .hero-swiper .swiper-button-prev {
        width: 40px;
        height: 40px;
    }

    .hero-swiper .swiper-button-next::after,
    .hero-swiper .swiper-button-prev::after {
        font-size: 16px;
    }

    .hero-swiper .swiper-pagination {
        bottom: 20px;
    }

    .hero-swiper .swiper-pagination-bullet {
        width: 10px;
        height: 10px;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
        line-height: 1.1;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        line-height: 1.5;
    }

    h1 {
        font-size: 1.875rem;
        line-height: 1.2;
    }

    h2 {
        font-size: 1.5rem;
        line-height: 1.3;
    }
}

@media (min-width: 641px) and (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
        line-height: 1.1;
    }

    .hero-subtitle {
        font-size: 1.25rem;
        line-height: 1.6;
    }
}

@media (min-width: 1025px) {
    .hero-title {
        font-size: 3rem;
        line-height: 1.1;
    }

    .hero-subtitle {
        font-size: 1.375rem;
        line-height: 1.6;
    }
}

/* ==========================================================================
   21. Performance & Accessibility Optimizations
   ========================================================================== */
.font-display {
    font-display: swap;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    body {
        font-weight: 500;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        font-weight: 700;
    }
}

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

/* ==========================================================================
   22. Facebook-Style Dropdown System
   ========================================================================== */
.facebook-dropdown {
    position: relative;
}

.facebook-dropdown-menu {
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: var(--spacing-sm);
    width: 20rem;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-gray-200);
    overflow: hidden;
    z-index: var(--z-dropdown);
}

.facebook-dropdown-header {
    padding: 0.75rem var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-100);
    background: var(--color-gray-50);
}

.facebook-dropdown-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-900);
}

.facebook-dropdown-close {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.facebook-dropdown-close:hover {
    color: var(--color-gray-600);
}

.facebook-dropdown-back {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-100);
    background: var(--color-white);
}

.facebook-dropdown-back-btn {
    display: flex;
    align-items: center;
    font-size: 0.875rem;
    color: var(--color-gray-600);
    transition: color var(--transition-fast);
}

.facebook-dropdown-back-btn:hover {
    color: var(--color-gray-900);
}

.facebook-dropdown-breadcrumb {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-gray-50);
    border-bottom: 1px solid var(--color-gray-100);
    font-size: 0.75rem;
    color: var(--color-gray-500);
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-gray-300) var(--color-gray-100);
    white-space: nowrap;
}

.facebook-dropdown-breadcrumb>div {
    display: flex;
    align-items: center;
    min-width: max-content;
}

.facebook-dropdown-content {
    max-height: 24rem;
    overflow-y: auto;
}

.facebook-dropdown-item {
    padding: 0.75rem var(--spacing-md);
    transition: background-color var(--transition-fast);
    cursor: pointer;
}

.facebook-dropdown-item:hover {
    background: var(--color-gray-50);
}

.facebook-dropdown-item-text {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-900);
}

.facebook-dropdown-item-arrow {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.facebook-dropdown-item:hover .facebook-dropdown-item-arrow {
    color: var(--color-gray-600);
}

/* Facebook Dropdown Scrollbar */
.facebook-dropdown-content::-webkit-scrollbar {
    width: 6px;
}

.facebook-dropdown-content::-webkit-scrollbar-track {
    background: var(--color-gray-100);
}

.facebook-dropdown-content::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: 3px;
}

.facebook-dropdown-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-400);
}

/* ==========================================================================
   23. Dropdown Animation Classes
   ========================================================================== */
.facebook-dropdown-enter {
    opacity: 0;
    transform: scale(0.95) translateY(-10px);
}

.facebook-dropdown-enter-active {
    opacity: 1;
    transform: scale(1) translateY(0);
    transition: opacity 200ms ease-out, transform 200ms ease-out;
}

.facebook-dropdown-exit {
    opacity: 1;
    transform: scale(1) translateY(0);
}

.facebook-dropdown-exit-active {
    opacity: 0;
    transform: scale(0.95) translateY(-10px);
    transition: opacity 150ms ease-in, transform 150ms ease-in;
}

/* ==========================================================================
   24. Mobile Responsive Adjustments
   ========================================================================== */
@media (max-width: 640px) {
    .facebook-dropdown-menu {
        width: calc(100vw - 2rem);
        right: -0.5rem;
    }
}