/* Modern Study Materials Page Styles */

/* Base Styles */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');

:root {
    /* Modern Color Palette */
    --color-primary: #2563eb;
    --color-secondary: #7c3aed;
    --color-accent: #f59e0b;
    --color-dark: #111827;
    --color-light: #f3f4f6;
    --color-white: #ffffff;
    --color-success: #10b981;
    --color-error: #ef4444;
    
    /* Typography */
    --font-heading: 'Poppins', sans-serif;
    --font-body: 'Poppins', sans-serif;
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--color-dark);
    background: var(--color-light);
}

/* Study Materials Header */
.study-header {
    background: var(--color-white);
    padding: 8rem 5% 4rem;
    text-align: center;
}

.study-header h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 1rem;
    color: var(--color-dark);
    font-weight: 700;
}

.study-header p {
    max-width: 600px;
    margin: 0 auto;
    color: #6b7280;
    font-size: 1.1rem;
}

/* Search and Filters */
.search-filters {
    background: var(--color-white);
    padding: 2rem 5%;
    border-bottom: 1px solid #e5e7eb;
    position: sticky;
    top: 0;
    z-index: 10;
}

.search-filters-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
}

.search-bar {
    flex: 1;
    min-width: 300px;
    position: relative;
}

.search-bar input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 1px solid #e5e7eb;
    border-radius: 50px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #9ca3af;
}

.filter-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 500;
    transition: all 0.3s ease;
    background: transparent;
    color: #6b7280;
    border: 1px solid #e5e7eb;
    cursor: pointer;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* Materials Grid */
.materials-section {
    padding: 4rem 5%;
}

.materials-container {
    max-width: 1400px;
    margin: 0 auto;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.material-card {
    background: var(--color-white);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.material-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.material-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.material-content {
    padding: 2rem;
}

.material-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(37, 99, 235, 0.1);
    color: var(--color-primary);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.material-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-dark);
}

.material-description {
    color: #6b7280;
    margin-bottom: 1.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.material-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid #e5e7eb;
}

.material-stats {
    display: flex;
    gap: 1rem;
    color: #6b7280;
    font-size: 0.875rem;
}

.material-stat {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.material-action {
    color: var(--color-primary);
    font-weight: 500;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.material-action:hover {
    color: var(--color-secondary);
}

/* Loading State */
.loading-skeleton {
    background: linear-gradient(90deg, #f3f4f6 25%, #e5e7eb 50%, #f3f4f6 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .search-filters-container {
        flex-direction: column;
        align-items: stretch;
    }

    .search-bar {
        min-width: 100%;
    }

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

    .materials-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}

@media (max-width: 480px) {
    .study-header {
        padding: 6rem 5% 3rem;
    }

    .study-header h1 {
        font-size: 1.75rem;
    }

    .materials-section {
        padding: 2rem 5%;
    }

    .material-content {
        padding: 1.5rem;
    }
}

/* Study Materials Hero Section */
.study-materials-hero {
    /* background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%); */
    min-height: 65vh;
    padding: 6rem 2rem 4rem;
    text-align: center;
    color: var(--color-white);
}

.study-materials-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.study-materials-hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
}

/* Search Container */
.search-container {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    gap: 1rem;
}

.search-input {
    flex: 1;
    padding: 1rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.9);
}

.search-btn {
    background: var(--color-dark);
    color: var(--color-white);
    border: none;
    border-radius: 50px;
    padding: 0 2rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.search-btn:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

/* Materials Section */
.materials {
    padding: 4rem 5%;
}

.materials-container {
    max-width: 1400px;
    margin: 0 auto;
}

/* Filter Buttons */
.materials-filters {
    margin-bottom: 3rem;
}

.filter-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--color-primary);
    border-radius: 50px;
    background: transparent;
    color: var(--color-primary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--color-primary);
    color: var(--color-white);
}

/* Materials Grid */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.material-card {
    background: var(--color-white);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.material-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.material-icon {
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--color-white);
    font-size: 1.5rem;
}

.material-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-dark);
}

.material-card p {
    color: #6b7280;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.material-meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.material-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.material-action {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-primary);
    font-weight: 500;
    transition: all 0.3s ease;
}

.material-action:hover {
    color: var(--color-secondary);
}

/* Dark Mode Styles */
[data-theme="dark"] .material-card {
    background: var(--color-dark-card);
}

[data-theme="dark"] .material-card h3 {
    color: var(--color-light);
}

[data-theme="dark"] .material-card p {
    color: var(--color-gray);
}

/* Responsive Design */
@media (max-width: 768px) {
    .study-materials-hero {
        padding: 5rem 1rem 3rem;
    }

    .study-materials-hero h1 {
        font-size: 2rem;
    }

    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }

    .materials-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1.5rem;
    }

    .material-card {
        padding: 1.5rem;
    }
}

@media (max-width: 576px) {
    .study-materials-hero h1 {
        font-size: 1.75rem;
    }

    .search-container {
        flex-direction: column;
    }

    .search-btn {
        width: 100%;
        padding: 1rem;
    }

    .materials-grid {
        grid-template-columns: 1fr;
    }
}

/* Back Button Section */
.back-section {
    padding: 2rem;
    background-color: var(--bg-color);
    margin-top: 2rem;
}

.back-section .container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 25px;
    background-color: var(--primary-color);
    color: rgb(0, 47, 255);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.back-btn:hover {
    background-color: var(--primary-color-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.back-btn i {
    font-size: 1.1rem;
}

/* Dark Mode Styles for Back Button */
.dark-mode .back-btn {
    background-color: var(--primary-color-dark);
}

.dark-mode .back-btn:hover {
    background-color: var(--primary-color);
}