/**
 * TelcoRecord Admin Portal - Main Theme
 * Modern, responsive admin dashboard design
 */

/* ==========================================
   CSS Variables (Design Tokens)
   ========================================== */
:root {
    /* Primary Colors */
    --primary: #667eea;
    --primary-dark: #5568d3;
    --primary-light: #7c93f1;
    
    /* Secondary Colors */
    --secondary: #764ba2;
    --accent: #f093fb;
    
    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Neutral Colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Background */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    
    /* Sidebar */
    --sidebar-bg: #1e293b;
    --sidebar-text: #94a3b8;
    --sidebar-active: #667eea;
    --sidebar-width: 260px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
}

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

html {
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--gray-900);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   Typography
   ========================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--primary-dark);
}

/* ==========================================
   Utility Classes
   ========================================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }

.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error { color: var(--error); }
.text-gray { color: var(--gray-600); }

.bg-primary { background-color: var(--primary); }
.bg-success { background-color: var(--success); }
.bg-warning { background-color: var(--warning); }
.bg-error { background-color: var(--error); }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }

.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--spacing-sm); }
.gap-2 { gap: var(--spacing-md); }
.gap-3 { gap: var(--spacing-lg); }

/* ==========================================
   Buttons
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.25rem;
    font-size: var(--text-sm);
    font-weight: 500;
    line-height: 1;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
}

.btn-secondary {
    background-color: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--gray-300);
}

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

.btn-success:hover:not(:disabled) {
    background-color: #059669;
}

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

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

.btn-warning:hover:not(:disabled) {
    background-color: #d97706;
}

.btn-error:hover:not(:disabled) {
    background-color: #dc2626;
}

.btn-sm {
    padding: 0.5rem 0.875rem;
    font-size: var(--text-xs);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--text-base);
}

/* ==========================================
   Forms
   ========================================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: var(--text-sm);
    line-height: 1.5;
    color: var(--gray-900);
    background-color: white;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background-color: var(--gray-100);
    cursor: not-allowed;
}

.form-error {
    color: var(--error);
    font-size: var(--text-xs);
    margin-top: var(--spacing-xs);
}

/* ==========================================
   Cards
   ========================================== */
.card {
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
}

.card-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
    background-color: var(--bg-secondary);
}

/* ==========================================
   Badges
   ========================================== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: var(--text-xs);
    font-weight: 500;
    border-radius: var(--radius-md);
}

.badge-primary {
    background-color: rgba(102, 126, 234, 0.1);
    color: var(--primary-dark);
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #059669;
}

.badge-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: #d97706;
}

.badge-error {
    background-color: rgba(239, 68, 68, 0.1);
    color: #dc2626;
}

.badge-gray {
    background-color: var(--gray-200);
    color: var(--gray-700);
}

/* ==========================================
   Tables
   ========================================== */
.table-container {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
}

.table thead {
    background-color: var(--gray-50);
    border-bottom: 2px solid var(--gray-200);
}

.table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--gray-700);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.table td {
    padding: 0.875rem 1rem;
    font-size: var(--text-sm);
    color: var(--gray-900);
    border-bottom: 1px solid var(--gray-200);
}

.table tbody tr:hover {
    background-color: var(--gray-50);
}

/* ==========================================
   Modals
   ========================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex; /* Always display flex - visibility controlled by existing in DOM */
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
    transition: opacity 0.2s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal {
    background-color: white;
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    width: 90%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal.modal-small {
    max-width: 400px;
}

.modal.modal-medium {
    max-width: 600px;
}

.modal.modal-large {
    max-width: 800px;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.modal-title {
    font-size: var(--text-xl);
    font-weight: 600;
    margin: 0;
    color: var(--gray-900);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-500);
    cursor: pointer;
    padding: 0.25rem;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    line-height: 1;
}

.modal-close:hover {
    background-color: var(--gray-100);
    color: var(--gray-700);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--gray-200);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    flex-shrink: 0;
    background-color: var(--gray-50);
}

/* ==========================================
   Alerts
   ========================================== */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    border-left: 4px solid var(--success);
    color: #065f46;
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning);
    color: #92400e;
}

.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    border-left: 4px solid var(--error);
    color: #991b1b;
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.1);
    border-left: 4px solid var(--info);
    color: #1e40af;
}

/* ==========================================
   Loading Spinner
   ========================================== */
.spinner {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ==========================================
   Responsive
   ========================================== */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 0;
    }
    
    .btn {
        width: 100%;
    }
}


/* =============================================
   DATA TABLES
   ============================================= */
.data-table-wrapper {
    background-color: var(--color-bg-card);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

.table-header {
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.data-table th {
    background-color: var(--color-bg-secondary);
    padding: 0.75rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--color-text-secondary);
    border-bottom: 2px solid var(--color-border);
}

.data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
}

.data-table tbody tr:hover {
    background-color: var(--color-bg-secondary);
}

.data-table td.actions {
    display: flex;
    gap: 0.5rem;
}

.pagination {
    margin-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pagination-buttons {
    display: flex;
    gap: 0.5rem;
}

/* =============================================
   BADGES & STATS
   ============================================= */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background-color: var(--success); color: white; }
.badge-warning { background-color: var(--warning); color: white; }
.badge-error { background-color: var(--error); color: white; }
.badge-info { background-color: var(--primary); color: white; }
.badge-secondary { background-color: var(--gray-300); color: var(--gray-700); }