/* Hero Section */
.hero-section {
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    border-radius: 16px;
    padding: 3rem;
    color: white;
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.hero-content h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.hero-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

.school-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.hero-image img {
    max-height: 150px;
    opacity: 0.9;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

/* Stats Card */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.stat-item {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Upload Card */
.upload-area {
    border: 2px dashed #cbd5e1;
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 1rem;
}

.upload-area:hover, .upload-area.dragover {
    border-color: #667eea;
    background: #f8fafc;
}

.upload-icon {
    font-size: 3rem;
    color: #94a3b8;
    margin-bottom: 1rem;
}

.upload-area p {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.upload-hint, .upload-size {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.upload-type {
    margin-bottom: 1rem;
}

.upload-type label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.upload-type select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: white;
}

.upload-status {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 6px;
    display: none;
}

.upload-status.success {
    display: block;
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.upload-status.error {
    display: block;
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Recent Files */
.files-list {
    max-height: 300px;
    overflow-y: auto;
}

.file-item {
    display: flex;
    align-items: center;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.file-item:last-child {
    border-bottom: none;
}

.file-icon {
    width: 40px;
    height: 40px;
    background: #ede9fe;
    color: #7c3aed;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.file-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.file-status {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.file-status.completed {
    background: #d1fae5;
    color: #065f46;
}

.file-status.error {
    background: #fee2e2;
    color: #991b1b;
}

@media (max-width: 968px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-section {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-image {
        display: none;
    }
}
/* ==========================================
   СТИЛИ ДЛЯ ГРАФИКОВ И АНАЛИТИКИ
   ========================================== */

/* Секция графиков */
.charts-section {
    margin-top: 30px;
}

.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 20px;
}

.chart-container {
    background: white;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.chart-container h4 {
    margin-bottom: 15px;
    color: #667eea;
    font-size: 16px;
    font-weight: 600;
}

.chart-container.full-width {
    grid-column: 1 / -1;
}

canvas {
    max-height: 300px;
    width: 100% !important;
}

/* Адаптивность графиков */
@media (max-width: 768px) {
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    canvas {
        max-height: 250px !important;
    }
}