/* 
 * styles.css
 * Clean, modern academic dashboard design
 */

:root {
    --bg-color: #f4f7f9;
    --text-main: #2d3748;
    --text-muted: #4a5568;
    --card-bg: #ffffff;
    --primary-color: #3182ce;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.05), 0 2px 4px rgba(0,0,0,0.03);
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-family);
    line-height: 1.6;
    padding: 2rem;
}

.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header & Premise Section */
.dashboard-header {
    margin-bottom: 2rem;
}

.dashboard-header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

.premise-section {
    background-color: var(--card-bg);
    padding: 1.5rem 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
}

.premise-section h2 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.premise-section p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* Statistics Section (Flexbox) */
.statistics-section {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    flex: 1 1 calc(25% - 1.5rem);
    min-width: 200px;
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    justify-content: center;
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.stat-title {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

/* Data Table Section */
.data-table-section {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.data-table-section h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    white-space: nowrap;
}

.data-table th, 
.data-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background-color: #f8fafc;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table tbody tr:nth-child(even) {
    background-color: #f8fafc;
}

.data-table tbody tr:hover {
    background-color: #edf2f7;
}

.no-data {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Error Messages */
.error-msg {
    background-color: #fff5f5;
    color: #c53030;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border-left: 4px solid #f56565;
    font-weight: 500;
}

/* Footer */
.dashboard-footer {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.dashboard-footer code {
    background-color: #e2e8f0;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: monospace;
}