/* Course Page Specific Styles */
:root {
    --course-primary: #4f46e5;
    --course-secondary: #6366f1;
    --course-accent: #10b981;
    --course-text: #1e293b;
    --course-light: #64748b;
    --course-bg: #f8fafc;
    --course-card-bg: #ffffff;
    --course-success: #22c55e;
    --course-warning: #f59e0b;
    --course-gradient: linear-gradient(135deg, #4f46e5, #6366f1);
    --course-shadow: 0 10px 30px rgba(79, 70, 229, 0.1);
    --starter-gradient: linear-gradient(135deg, #3b82f6, #60a5fa);
    --pro-gradient: linear-gradient(135deg, #4f46e5, #6366f1);
    --premium-gradient: linear-gradient(135deg, #7c3aed, #8b5cf6);
}

/* Course Hero Section */
.course-hero {
    background: linear-gradient(135deg, #f5f7ff 0%, #ffffff 100%);
    padding: 10rem 5% 5rem;
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.course-hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.course-rating {
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.stars {
    color: #f59e0b;
    font-size: 1.2rem;
}

.rating-text {
    color: var(--course-light);
    font-weight: 500;
}

.course-hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    background: var(--course-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

.course-subtitle {
    font-size: 1.5rem;
    color: var(--course-light);
    margin-bottom: 2rem;
}

.course-highlights {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--course-text);
    background: white;
    padding: 1rem 2rem;
    border-radius: 10px;
    box-shadow: var(--course-shadow);
}

.highlight-item i {
    color: var(--course-primary);
    font-size: 1.2rem;
}

/* Course Details Section */
.course-details {
    padding: 5rem 5%;
    background: var(--course-bg);
}

.course-container {
    max-width: 900px;
    margin: 0 auto;
}

.course-main {
    width: 100%;
    background: var(--course-card-bg);
    padding: 1.5rem;
    border-radius: 15px;
    box-shadow: var(--course-shadow);
}

.about-course h2,
.learning-points h2,
.course-curriculum h2 {
    color: var(--course-text);
    font-size: 2.5rem;
    margin-bottom: 2rem;
    background: var(--course-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.learning-points ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.learning-points li {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem;
    background: white;
    border-radius: 10px;
    box-shadow: var(--course-shadow);
    transition: transform 0.3s ease;
}

.learning-points li:hover {
    transform: translateY(-2px);
}

.learning-points i {
    color: var(--course-success);
    font-size: 1.2rem;
}

/* Enhanced Curriculum Section */
.course-curriculum {
    position: relative;
    padding: 0;
    background: white;
    border-radius: 15px;
    box-shadow: var(--course-shadow);
    margin-top: 2rem;
}

.curriculum-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background: var(--course-bg);
    border-radius: 15px;
    overflow-x: auto;
    scrollbar-width: thin;
}

.curriculum-tab {
    padding: 1rem 2rem;
    background: white;
    border: none;
    border-radius: 10px;
    color: var(--course-text);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.curriculum-tab.active {
    background: var(--course-gradient);
    color: white;
    transform: translateY(-2px);
}

.curriculum-tab:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.curriculum-content {
    position: relative;
}

.curriculum-list-container {
    width: 100%;
    background: white;
    border-radius: 15px;
}

.curriculum-section {
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    background: white;
    opacity: 1;
    visibility: visible;
    height: auto;
    margin-bottom: 0;
}

.section-header {
    padding: 1.5rem;
    background: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.section-header:hover {
    background: rgba(99, 102, 241, 0.05);
}

.section-header h3 {
    margin: 0;
    font-size: 1.2rem;
    color: var(--course-text);
    font-weight: 600;
    width: 100%;
}

.section-lessons {
    background: #f8fafc;
    padding: 0;
    margin: 0;
    list-style: none;
    display: none;
}

.curriculum-section.active .section-lessons {
    display: block;
}

.section-lessons li {
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.section-lessons li:hover {
    background: rgba(99, 102, 241, 0.05);
    transform: translateX(10px);
}

.section-lessons i {
    color: var(--course-success);
    font-size: 1rem;
    min-width: 20px;
}

.lesson-title {
    flex: 1;
    color: var(--course-text);
    font-size: 1rem;
    padding-right: 1rem;
}

/* Dropdown Arrow */
.section-header::after {
    content: '\f107';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--course-primary);
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.curriculum-section.active .section-header::after {
    transform: rotate(180deg);
}

.curriculum-section.active .section-header {
    background: rgba(99, 102, 241, 0.05);
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
}

/* Remove animations that might interfere with visibility */
.curriculum-section {
    animation: none;
    transform: none;
    opacity: 1;
}

/* Course Progress Indicator */
.course-progress {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--course-gradient);
    width: 0;
    transition: width 0.5s ease;
}

/* Module Status Indicators */
.module-status {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.status-included {
    background: rgba(34, 197, 94, 0.1);
    color: var(--course-success);
}

.status-premium {
    background: rgba(124, 58, 237, 0.1);
    color: #7c3aed;
}

/* Enhanced Animations */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.module-header.active {
    background: rgba(99, 102, 241, 0.05);
    border-color: var(--course-primary);
}

.module-header.active .module-number {
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(99, 102, 241, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0);
    }
}

/* Course Sidebar */
.course-sidebar {
    position: sticky;
    top: 100px;
}

.course-card {
    background: var(--course-card-bg);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--course-shadow);
}

.course-preview img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.course-info {
    padding: 2rem;
}

.course-price {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.new-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--course-text);
}

.old-price {
    text-decoration: line-through;
    color: var(--course-light);
}

.discount {
    background: #fef2f2;
    color: #ef4444;
    padding: 0.25rem 0.5rem;
    border-radius: 5px;
    font-weight: 500;
}

.enroll-button {
    display: block;
    background: var(--course-gradient);
    color: white;
    text-align: center;
    padding: 1rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    margin-bottom: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.enroll-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(99, 102, 241, 0.2);
}

.course-features {
    display: grid;
    gap: 1rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--course-text);
}

.feature i {
    color: var(--course-primary);
}

/* Enroll Section */
.enroll-section {
    background: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%);
    padding: 5rem 5%;
    color: white;
    text-align: center;
}

.enroll-container {
    max-width: 800px;
    margin: 0 auto;
}

.enroll-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.enroll-buttons {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

.telegram-btn {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    background: white;
    color: var(--course-primary);
    padding: 1rem 2rem;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.telegram-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.2);
}

.telegram-btn i {
    font-size: 1.5rem;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

[data-aos] {
    opacity: 0;
    transition-property: transform, opacity;
}

[data-aos="fade-up"] {
    transform: translateY(20px);
}

[data-aos="fade-right"] {
    transform: translateX(-20px);
}

[data-aos="fade-left"] {
    transform: translateX(20px);
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translate(0);
}

/* Responsive Design */
@media (max-width: 992px) {
    .course-hero h1 {
        font-size: 2.5rem;
    }

    .course-subtitle {
        font-size: 1.2rem;
    }

    .course-highlights {
        flex-direction: column;
        align-items: center;
    }

    .course-main {
        padding: 2rem;
    }
}

@media (max-width: 768px) {
    .course-hero {
        padding: 8rem 5% 3rem;
    }

    .learning-points ul {
        grid-template-columns: 1fr;
    }

    .highlight-item {
        width: 100%;
        justify-content: center;
    }
}

.course-grid {
    display: grid;
    grid-template-columns: 1fr;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

/* Curriculum Dropdown Styles */
.curriculum-module {
    margin-bottom: 1rem;
    border-radius: 10px;
    overflow: hidden;
    background: white;
    box-shadow: var(--course-shadow);
}

.module-header {
    padding: 1.8rem;
    background: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 10px;
}

.module-header:hover {
    background: rgba(99, 102, 241, 0.05);
    transform: translateX(5px);
}

.module-header h3 {
    margin: 0;
    font-size: 1.3rem;
    color: var(--course-text);
    font-weight: 600;
}

.module-header i {
    color: var(--course-primary);
    transition: transform 0.3s ease;
}

.curriculum-module.active .module-header i {
    transform: rotate(-180deg);
}

.curriculum-list {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.curriculum-module.active .curriculum-list {
    max-height: 500px;
}

/* Price Cards Styles */
.course-pricing {
    margin-top: 3rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    width: 100%;
}

.price-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--course-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.price-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.15);
}

.price-header {
    padding: 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.starter .price-header {
    background: var(--starter-gradient);
}

.pro .price-header {
    background: var(--pro-gradient);
}

.premium .price-header {
    background: var(--premium-gradient);
}

.price-header h3 {
    color: white;
    font-size: 1.5rem;
    margin: 0 0 1rem;
}

.price {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.amount {
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
}

.original {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: line-through;
    font-size: 1.2rem;
}

.save-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.popular-badge {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: #ef4444;
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 0 0 10px 10px;
    font-size: 0.9rem;
    font-weight: 500;
    z-index: 1;
}

.price-features {
    list-style: none;
    padding: 2rem;
    margin: 0;
}

.price-features li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: var(--course-text);
}

.price-features i {
    color: var(--course-success);
}

.price-btn {
    display: block;
    margin: 0 2rem 2rem;
    padding: 1rem;
    text-align: center;
    border-radius: 10px;
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.starter .price-btn {
    background: var(--starter-gradient);
}

.pro .price-btn {
    background: var(--pro-gradient);
}

.premium .price-btn {
    background: var(--premium-gradient);
}

.price-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(79, 70, 229, 0.2);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .course-grid {
        grid-template-columns: 1fr;
    }

    .course-pricing {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }

    .price-card {
        flex: 1;
        min-width: 300px;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .course-pricing {
        flex-direction: column;
        align-items: center;
    }

    .price-card {
        width: 100%;
        max-width: none;
    }

    .course-main {
        padding: 1rem;
    }
    
    .section-header {
        padding: 1.2rem 1.5rem;
    }
    
    .section-lessons li {
        padding: 0.8rem 1.5rem;
    }

    .section-header h3 {
        font-size: 1.1rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Page Loading Animation */
.page-transition {
    animation: fadeInPage 0.6s ease-in-out;
}

@keyframes fadeInPage {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Course Type Indicator */
.course-type-indicator {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1rem;
    background: var(--course-gradient);
    color: white;
    text-align: center;
    font-weight: 500;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

.curriculum-module:hover .course-type-indicator {
    transform: translateY(0);
}

/* Loading Animation */
.loading-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: white;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
}

.loading-animation.hide {
    opacity: 0;
    pointer-events: none;
}

.loader {
    width: 50px;
    height: 50px;
    border: 5px solid var(--course-bg);
    border-top: 5px solid var(--course-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Enhanced Curriculum Styles */
.curriculum-list-container {
    width: 100%;
    background: white;
    border-radius: 15px;
    box-shadow: var(--course-shadow);
}

.curriculum-section {
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    background: white;
}

.curriculum-section:last-child {
    border-bottom: none;
}

.section-header {
    padding: 1.5rem;
    background: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.section-header:hover {
    background: rgba(99, 102, 241, 0.05);
}

.section-header h3 {
    margin: 0;
    font-size: 1.2rem;
    color: var(--course-text);
    font-weight: 600;
}

.section-duration {
    color: var(--course-light);
    font-size: 0.9rem;
}

.section-lessons {
    display: none;
    background: #f8fafc;
    padding: 0;
    margin: 0;
    list-style: none;
}

.curriculum-section.active .section-lessons {
    display: block;
}

.section-lessons li {
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

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

.section-lessons li:hover {
    background: rgba(99, 102, 241, 0.05);
    transform: translateX(10px);
}

.section-lessons i {
    color: var(--course-primary);
    font-size: 1rem;
    min-width: 20px;
}

.lesson-title {
    flex: 1;
    color: var(--course-text);
    font-size: 1rem;
    padding-right: 1rem;
}

.lesson-duration {
    color: var(--course-light);
    font-size: 0.9rem;
    min-width: 60px;
    text-align: right;
}

.section-header::after {
    content: '\f107';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--course-primary);
    transition: transform 0.3s ease;
}

.curriculum-section.active .section-header::after {
    transform: rotate(180deg);
}

/* Curriculum Animation */
.curriculum-section {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.5s ease forwards;
}

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

.curriculum-section:nth-child(1) { animation-delay: 0.1s; }
.curriculum-section:nth-child(2) { animation-delay: 0.2s; }
.curriculum-section:nth-child(3) { animation-delay: 0.3s; }
.curriculum-section:nth-child(4) { animation-delay: 0.4s; }
.curriculum-section:nth-child(5) { animation-delay: 0.5s; }
.curriculum-section:nth-child(6) { animation-delay: 0.6s; }
.curriculum-section:nth-child(7) { animation-delay: 0.7s; }
.curriculum-section:nth-child(8) { animation-delay: 0.8s; }
.curriculum-section:nth-child(9) { animation-delay: 0.9s; }
.curriculum-section:nth-child(10) { animation-delay: 1s; }

/* Section Expansion */
.section-lessons {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.curriculum-section.active .section-lessons {
    max-height: 500px;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .section-header {
        padding: 1.2rem 1.5rem;
    }

    .section-header h3 {
        font-size: 1.1rem;
    }

    .section-lessons li {
        padding: 1rem 1.5rem;
    }

    .lesson-title {
        font-size: 0.95rem;
    }
}