/**
 * Samples Page - Modern Academic Design
 * Fortune Writers - Academic Writing Samples Showcase
 */

/* Hero Section */
.samples-hero {
    position: relative;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    padding: 6rem 0 4rem;
    overflow: hidden;
}

.samples-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.samples-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.samples-hero h1 {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    color: var(--color-white);
    margin-bottom: var(--space-4);
    line-height: var(--leading-tight);
}

.samples-hero p {
    font-size: var(--text-xl);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--space-8);
    line-height: var(--leading-relaxed);
}

.samples-hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-8);
    flex-wrap: wrap;
    margin-top: var(--space-8);
}

.hero-stat {
    text-align: center;
    padding: var(--space-4);
}

.hero-stat-number {
    display: block;
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-secondary);
    line-height: 1;
    margin-bottom: var(--space-2);
}

.hero-stat-label {
    display: block;
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.9);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Filter Section */
.samples-filter-section {
    background: var(--color-white);
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 70px;
    z-index: var(--z-sticky);
    box-shadow: var(--shadow-sm);
}

.filter-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.filter-label {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-gray-700);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-buttons {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--space-2) var(--space-4);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    border-radius: var(--radius-full);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-gray-700);
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-btn:hover {
    background: var(--color-gray-200);
    transform: translateY(-1px);
}

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

.search-box {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--color-gray-50);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    border: 2px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.search-box:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(10, 36, 99, 0.1);
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    font-size: var(--text-sm);
    color: var(--color-gray-900);
    flex: 1;
    min-width: 200px;
}

.search-box i {
    color: var(--color-gray-400);
}

/* Samples Main Section */
.samples-main {
    padding: var(--space-16) 0;
    background: var(--color-gray-50);
}

.samples-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-12);
}

.samples-header h2 {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.samples-header p {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* Category Sections */
.category-section {
    margin-bottom: var(--space-16);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-4);
    border-bottom: 3px solid var(--color-primary);
}

.category-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    border-radius: var(--radius-xl);
    font-size: var(--text-2xl);
    flex-shrink: 0;
}

.category-info h3 {
    font-size: var(--text-3xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
}

.category-info p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    margin: 0;
}

/* Samples Grid */
.samples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: var(--space-8);
}

/* Sample Card */
.sample-card {
    background: var(--color-white);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.sample-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

/* Sample Header */
.sample-card-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    padding: var(--space-6);
    position: relative;
    overflow: hidden;
}

.sample-card-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.sample-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-white);
    margin-bottom: var(--space-3);
    position: relative;
    z-index: 1;
}

.sample-meta {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.sample-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.sample-badge i {
    font-size: var(--text-xs);
}

/* Academic Level Colors */
.badge-undergraduate {
    background: rgba(16, 185, 129, 0.2);
    border-color: rgba(16, 185, 129, 0.4);
}

.badge-masters {
    background: rgba(59, 130, 246, 0.2);
    border-color: rgba(59, 130, 246, 0.4);
}

.badge-phd {
    background: rgba(139, 92, 246, 0.2);
    border-color: rgba(139, 92, 246, 0.4);
}

/* Sample Body */
.sample-card-body {
    padding: var(--space-6);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.sample-description {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-4);
}

.sample-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.sample-detail {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
}

.sample-detail-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
    font-size: var(--text-sm);
    flex-shrink: 0;
}

.sample-detail-content {
    flex: 1;
}

.sample-detail-label {
    display: block;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-1);
}

.sample-detail-value {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-gray-900);
}

/* Sample Preview */
.sample-preview {
    background: var(--color-gray-50);
    border-left: 4px solid var(--color-primary);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-5);
}

.sample-preview-title {
    font-size: var(--text-sm);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sample-preview-text {
    font-size: var(--text-sm);
    color: var(--color-gray-700);
    line-height: var(--leading-relaxed);
    font-style: italic;
    margin: 0;
}

/* Grade Badge */
.grade-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--color-success-light);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-5);
}

.grade-badge-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-success);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
}

.grade-badge-text {
    font-size: var(--text-sm);
    font-weight: var(--font-bold);
    color: var(--color-success);
}

/* Sample Actions */
.sample-actions {
    display: flex;
    gap: var(--space-3);
    margin-top: auto;
}

.sample-btn {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    border: 2px solid transparent;
}

.sample-btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
}

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

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

.sample-btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

/* CTA Section */
.samples-cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    padding: var(--space-16) 0;
    position: relative;
    overflow: hidden;
}

.samples-cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1.5" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
}

.samples-cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.samples-cta-content h2 {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-white);
    margin-bottom: var(--space-4);
}

.samples-cta-content p {
    font-size: var(--text-lg);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--space-8);
    line-height: var(--leading-relaxed);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.cta-btn {
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-lg);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    border: 2px solid transparent;
}

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

.cta-btn-primary:hover {
    background: var(--color-secondary-light);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.cta-btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.cta-btn-outline:hover {
    background: var(--color-white);
    color: var(--color-primary);
}

/* Quality Assurance Section */
.quality-assurance-section {
    padding: var(--space-16) 0;
    background: var(--color-white);
}

.quality-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-12);
}

.quality-header h2 {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.quality-header p {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
}

.quality-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
}

.quality-card {
    text-align: center;
    padding: var(--space-8);
    background: var(--color-gray-50);
    border-radius: var(--radius-2xl);
    transition: all var(--transition-base);
}

.quality-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    background: var(--color-white);
}

.quality-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-5);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    border-radius: var(--radius-2xl);
    font-size: var(--text-3xl);
    box-shadow: var(--shadow-lg);
}

.quality-card h3 {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-3);
}

.quality-card p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin: 0;
}

/* Testimonials Section */
.testimonials-section {
    padding: var(--space-16) 0;
    background: var(--color-gray-50);
}

.testimonials-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-12);
}

.testimonials-header h2 {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

.testimonial-card {
    background: var(--color-white);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    position: relative;
}

.testimonial-quote {
    position: absolute;
    top: var(--space-6);
    left: var(--space-6);
    font-size: var(--text-5xl);
    color: var(--color-secondary);
    opacity: 0.3;
    line-height: 1;
}

.testimonial-text {
    font-size: var(--text-base);
    color: var(--color-gray-700);
    line-height: var(--leading-relaxed);
    font-style: italic;
    margin-bottom: var(--space-6);
    padding-top: var(--space-6);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
}

.author-info h4 {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-1);
}

.author-info p {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin: 0;
}

.testimonial-rating {
    display: flex;
    gap: var(--space-1);
    margin-top: var(--space-2);
}

.testimonial-rating i {
    color: var(--color-secondary);
    font-size: var(--text-sm);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-4);
}

.empty-state-icon {
    font-size: var(--text-6xl);
    color: var(--color-gray-300);
    margin-bottom: var(--space-4);
}

.empty-state h3 {
    font-size: var(--text-2xl);
    font-weight: var(--font-semibold);
    color: var(--color-gray-700);
    margin-bottom: var(--space-2);
}

.empty-state p {
    font-size: var(--text-base);
    color: var(--color-text-secondary);
}

/* Loading State */
.loading-state {
    text-align: center;
    padding: var(--space-16) var(--space-4);
}

.loading-spinner {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--space-4);
    border: 4px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .samples-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
    
    .samples-hero h1 {
        font-size: var(--text-4xl);
    }
}

@media (max-width: 768px) {
    .samples-hero {
        padding: 4rem 0 3rem;
    }
    
    .samples-hero h1 {
        font-size: var(--text-3xl);
    }
    
    .samples-hero p {
        font-size: var(--text-lg);
    }
    
    .samples-hero-stats {
        gap: var(--space-4);
    }
    
    .filter-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box input {
        min-width: auto;
    }
    
    .samples-grid {
        grid-template-columns: 1fr;
    }
    
    .sample-details {
        grid-template-columns: 1fr;
    }
    
    .quality-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .cta-btn {
        width: 100%;
    }
    
    .samples-header h2,
    .quality-header h2,
    .testimonials-header h2 {
        font-size: var(--text-3xl);
    }
}

/* Sample Notifications */
.sample-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: var(--space-4) var(--space-6);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    z-index: 10000;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    max-width: 350px;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
}

.sample-notification.show {
    transform: translateX(0);
}

.sample-notification-success {
    border-left: 4px solid #10b981;
    color: #065f46;
}

.sample-notification-error {
    border-left: 4px solid #ef4444;
    color: #991b1b;
}

.sample-notification-warning {
    border-left: 4px solid #f59e0b;
    color: #92400e;
}

.sample-notification-info {
    border-left: 4px solid #3b82f6;
    color: #1e40af;
}

/* Favorite Button Styles */
.sample-btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--color-gray-100);
    border: 2px solid transparent;
    color: var(--color-gray-500);
    cursor: pointer;
    transition: all var(--transition-base);
}

.sample-btn-icon:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
    transform: scale(1.05);
}

.sample-btn-icon.favorited {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.3);
}

.sample-btn-icon.favorited:hover {
    background: rgba(239, 68, 68, 0.2);
    color: #dc2626;
}

/* No Samples Message */
.no-samples-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-12) var(--space-6);
    color: var(--color-gray-500);
}

.no-samples-message i {
    font-size: 4rem;
    margin-bottom: var(--space-4);
    color: var(--color-gray-300);
}

.no-samples-message p {
    font-size: var(--text-lg);
    color: var(--color-gray-600);
}

@media (max-width: 480px) {
    .samples-hero h1 {
        font-size: var(--text-2xl);
    }
    
    .samples-hero p {
        font-size: var(--text-base);
    }
    
    .hero-stat-number {
        font-size: var(--text-3xl);
    }
    
    .sample-card-header {
        padding: var(--space-4);
    }
    
    .sample-card-body {
        padding: var(--space-4);
    }
    
    .sample-title {
        font-size: var(--text-lg);
    }
    
    .sample-actions {
        flex-direction: column;
    }
}