/* ========================================
   ROOT VARIABLES & RESET
   ======================================== */
:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #818cf8;
    --success: #10b981;
    --success-dark: #059669;
    --warning: #f59e0b;
    --danger: #ef4444;
    --danger-dark: #dc2626;
    --info: #3b82f6;
    --dark: #1e293b;
    --gray: #64748b;
    --light: #f8fafc;
    --border: #e2e8f0;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --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);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --radius: 0.75rem;
    --radius-lg: 1rem;
    --radius-sm: 0.5rem;
    
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #eef2f6 100%);
    color: var(--dark);
    line-height: 1.5;
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* ========================================
   HEADER & NAVIGATION
   ======================================== */
.header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-lg);
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

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

/* Navigation */
.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    background: white;
    padding: 0.75rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.nav a {
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--gray);
    font-weight: 500;
    transition: var(--transition);
}

.nav a:hover {
    background: var(--light);
    color: var(--primary);
}

.nav a.active {
    background: var(--primary);
    color: white;
}

/* ========================================
   CARDS
   ======================================== */
.card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card h2, .card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border);
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* ========================================
   STATISTICS GRID
   ======================================== */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: linear-gradient(135deg, white 0%, var(--light) 100%);
    border-radius: var(--radius);
    padding: 1.25rem;
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary);
}

.stat-card.primary::before { background: var(--primary); }
.stat-card.success::before { background: var(--success); }
.stat-card.warning::before { background: var(--warning); }
.stat-card.danger::before { background: var(--danger); }

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1;
}

.stat-label {
    color: var(--gray);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.stat-icon {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    font-size: 3rem;
    opacity: 0.15;
}

/* ========================================
   TABLES
   ======================================== */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 0.875rem 1rem;
    background: var(--light);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--gray);
    border-bottom: 1px solid var(--border);
}

td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: var(--light);
}

/* ========================================
   FORMS
   ======================================== */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Form 2 columns */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    background: var(--light);
    color: var(--dark);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: var(--success-dark);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: var(--danger-dark);
}

.btn-warning {
    background: var(--warning);
    color: white;
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
}

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

/* ========================================
   ALERTS
   ======================================== */
.alert {
    padding: 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 3px solid var(--success);
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border-left: 3px solid var(--danger);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-left: 3px solid var(--warning);
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-left: 3px solid var(--info);
}

/* ========================================
   BADGES
   ======================================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.625rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-primary { background: var(--primary-light); color: white; }
.badge-success { background: var(--success); color: white; }
.badge-warning { background: var(--warning); color: white; }
.badge-danger { background: var(--danger); color: white; }
.badge-gray { background: var(--gray); color: white; }

/* ========================================
   LIST NAMES (2 columns)
   ======================================== */
.name-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    max-height: 400px;
    overflow-y: auto;
    padding: 0.5rem;
}

.name-list-item {
    padding: 0.5rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.875rem;
}

.name-list-item:hover {
    background: var(--light);
    border-radius: var(--radius-sm);
}

@media (max-width: 640px) {
    .name-list {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   INFO BOX
   ======================================== */
.info-box {
    background: #eef2ff;
    border-left: 3px solid var(--primary);
    padding: 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 1.35rem;
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    th, td {
        padding: 0.625rem;
    }
    
    .btn {
        padding: 0.375rem 1rem;
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.card, .stat-card, .result-card {
    animation: fadeIn 0.3s ease-out;
}

/* ========================================
   RESULT CARD (Search)
   ======================================== */
.result-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition);
}

.result-card:hover {
    box-shadow: var(--shadow-md);
}

.result-header {
    background: var(--primary);
    color: white;
    padding: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.result-header:hover {
    background: var(--primary-dark);
}

.result-body {
    padding: 1.25rem;
    background: white;
}

/* ========================================
   LOADING STATE
   ======================================== */
.btn-loading {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-loading::after {
    content: '';
    display: inline-block;
    width: 12px;
    height: 12px;
    margin-left: 8px;
    border: 2px solid white;
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.6s linear infinite;
}

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