/* Root Variables */
:root {
    /* Unified palette */
    --primary-color: #004C69;   /* rgb(0,76,105) */
    --primary-dark: #007FAC;    /* rgb(0,127,172) */
    --secondary-color: #B5CAD7; /* rgb(181,202,215) */
    --accent-color: #007FAC;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f6f9fb;
    --bg-tertiary: #e8f0f5;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #B5CAD7;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    /* Glass + glow */
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-elevated-bg: rgba(255, 255, 255, 0.78);
    --glass-border: rgba(181, 202, 215, 0.6);
    --backdrop-blur: 14px;
    --glow-primary: 0 8px 30px rgba(0, 127, 172, 0.35);
    --glow-soft: 0 8px 24px rgba(0, 0, 0, 0.06);
    
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0b1620;
        --bg-secondary: #122232;
        --bg-tertiary: #183448;
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-muted: #8aa0b2;
        --border-color: #2a4a5f;
        --glass-bg: rgba(11, 22, 32, 0.55);
        --glass-elevated-bg: rgba(18, 34, 50, 0.72);
        --glass-border: rgba(0, 127, 172, 0.25);
        --glow-primary: 0 8px 30px rgba(0, 127, 172, 0.35);
        --glow-soft: 0 8px 24px rgba(0, 0, 0, 0.4);
    }
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    background: var(--glass-bg);
    color: var(--text-primary);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--glass-border);
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    backdrop-filter: blur(var(--backdrop-blur));
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.logo p {
    opacity: 0.9;
    font-size: 0.95rem;
}

/* Header Actions */
.header-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    font-family: inherit;
    min-height: 44px;
    box-sizing: border-box;
    background: var(--glass-elevated-bg);
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    backdrop-filter: blur(var(--backdrop-blur));
}

.btn-primary { background: linear-gradient(135deg, var(--primary-dark), var(--primary-color)); color: #fff; border-color: transparent; box-shadow: var(--glow-soft); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--glow-primary); }

.btn-secondary { background: var(--glass-elevated-bg); color: var(--text-primary); border: 1px solid var(--glass-border); }
.btn-secondary:hover { background: var(--glass-bg); transform: translateY(-1px); }

.btn-success { background: #16a34a; color: #fff; border-color: transparent; }
.btn-success:hover { background: #12843d; transform: translateY(-1px); box-shadow: var(--glow-soft); }

.btn-warning { background: var(--accent-color); color: #fff; border-color: transparent; }
.btn-warning:hover { background: var(--primary-color); transform: translateY(-1px); box-shadow: var(--glow-primary); }

/* Main Content */
.main {
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - 200px);
}

/* Controls Section */
.controls {
    background: var(--glass-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--glow-soft);
    border: 1px solid var(--glass-border);
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    backdrop-filter: blur(var(--backdrop-blur));
}

.search-bar {
    margin-bottom: var(--spacing-lg);
}

.search-bar input {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: var(--glass-elevated-bg);
    color: var(--text-primary);
    transition: all 0.3s ease;
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    backdrop-filter: blur(var(--backdrop-blur));
}

.search-bar input:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 3px rgba(0, 127, 172, 0.15); }

.filter-tabs {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.tab-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--glass-border);
    background: var(--glass-elevated-bg);
    color: var(--text-secondary);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    backdrop-filter: blur(var(--backdrop-blur));
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-btn.active { background: linear-gradient(135deg, var(--primary-dark), var(--primary-color)); border-color: transparent; color: #fff; box-shadow: var(--glow-soft); }

/* Loading State */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    text-align: center;
}

.loader {
    width: 50px;
    height: 50px;
    border: 4px solid var(--bg-tertiary);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

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

/* Data Grid */
.data-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.data-card {
    background: var(--glass-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glow-soft);
    transition: all 0.3s ease;
    cursor: pointer;
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    backdrop-filter: blur(var(--backdrop-blur));
}

.data-card:hover { transform: translateY(-4px); box-shadow: var(--glow-primary); border-color: var(--primary-color); }

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card-badge {
    background: var(--primary-dark);
    color: #fff;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    font-weight: 500;
}

.card-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.card-content {
    color: var(--text-secondary);
}

.card-stats {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.stat {
    flex: 1;
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    display: block;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* No Results */
.no-results {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--text-muted);
}

.no-results-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1000;
    backdrop-filter: blur(6px);
}

.modal-content {
    background: var(--glass-elevated-bg);
    margin: 5vh auto;
    padding: 0;
    border-radius: var(--border-radius-xl);
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glow-soft);
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    backdrop-filter: blur(var(--backdrop-blur));
    animation: modalSlideIn 0.3s ease;
}

/* Wider modals on desktop */
@media (min-width: 1024px) {
    .modal-content {
        max-width: 1000px;
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    background: var(--glass-bg);
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.modal-close:hover { background: var(--bg-tertiary); color: var(--text-primary); }

.modal-body {
    padding: var(--spacing-lg);
    max-height: 70vh;
    overflow-y: auto;
    color: var(--text-primary);
}

/* Modal Footer */
.modal-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--glass-border);
    background: var(--glass-bg);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    color: var(--text-primary);
}

.record-grid {
    display: grid;
    gap: var(--spacing-md);
}

.record-item {
    background: var(--glass-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    -webkit-backdrop-filter: blur(var(--backdrop-blur));
    backdrop-filter: blur(var(--backdrop-blur));
}

.record-field {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--glass-border);
}

.record-field:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.field-label {
    font-weight: 500;
    color: var(--text-secondary);
    min-width: 120px;
}

.field-value {
    color: var(--text-primary);
    word-break: break-word;
    text-align: right;
    flex: 1;
}

.field-value.null {
    color: var(--text-muted);
    font-style: italic;
}

/* Footer */
.footer {
    background: var(--glass-bg);
    border-top: 1px solid var(--glass-border);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .header {
        padding: var(--spacing-md) 0;
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .main {
        padding: var(--spacing-lg) 0;
    }
    
    .data-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .modal-content {
        width: 95%;
        margin: 10px auto;
        max-height: 95vh;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .filter-tabs {
        justify-content: center;
    }
    
    .tab-btn {
        flex: 1;
        min-width: 0;
    }
}

@media (max-width: 480px) {
    .controls {
        padding: var(--spacing-md);
    }
    
    .data-card {
        padding: var(--spacing-md);
    }
    
    .modal-body {
        padding: var(--spacing-md);
    }
    
    .record-field {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .field-label {
        min-width: auto;
    }
    
    .field-value {
        text-align: left;
    }
}