/* ========================================
   🎨 SMARTCRM MODERN UI FRAMEWORK V2.0
   Professional Design System
   ======================================== */

/* === ROOT VARIABLES === */
:root {
    /* Primary Colors */
    --primary-600: #667eea;
    --primary-700: #5568d3;
    --primary-800: #4C51BF;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Status Colors */
    --success-500: #10B981;
    --success-600: #059669;
    --warning-500: #F59E0B;
    --warning-600: #D97706;
    --danger-500: #EF4444;
    --danger-600: #DC2626;
    --info-500: #3B82F6;
    --info-600: #2563EB;
    
    /* 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;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* === GLOBAL RESET === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--gray-700);
    background: var(--gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === MODERN CARD SYSTEM === */
.modern-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    border: 1px solid var(--gray-200);
}

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

.modern-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--gray-100);
    margin-bottom: var(--spacing-lg);
}

.modern-card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--gray-900);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.modern-card-body {
    padding: var(--spacing-md) 0;
}

/* === MODERN BUTTON SYSTEM === */
.modern-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem 1.25rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1.5;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

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

/* Button Variants */
.modern-btn-primary {
    background: var(--primary-gradient);
    color: white;
    border-color: var(--primary-600);
}

.modern-btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.modern-btn-success {
    background: var(--success-500);
    color: white;
}

.modern-btn-success:hover:not(:disabled) {
    background: var(--success-600);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(16, 185, 129, 0.3);
}

.modern-btn-danger {
    background: var(--danger-500);
    color: white;
}

.modern-btn-danger:hover:not(:disabled) {
    background: var(--danger-600);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(239, 68, 68, 0.3);
}

.modern-btn-warning {
    background: var(--warning-500);
    color: white;
}

.modern-btn-warning:hover:not(:disabled) {
    background: var(--warning-600);
    transform: translateY(-2px);
}

.modern-btn-outline {
    background: white;
    color: var(--primary-600);
    border-color: var(--primary-600);
}

.modern-btn-outline:hover:not(:disabled) {
    background: var(--primary-600);
    color: white;
}

/* Button Sizes */
.modern-btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: var(--font-size-xs);
}

.modern-btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: var(--font-size-lg);
}

/* === MODERN BADGE SYSTEM === */
.modern-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.25rem 0.75rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.modern-badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-600);
}

.modern-badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-600);
}

.modern-badge-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-600);
}

.modern-badge-info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info-600);
}

/* === MODERN INPUT SYSTEM === */
.modern-input-group {
    margin-bottom: var(--spacing-lg);
}

.modern-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
}

.modern-input {
    width: 100%;
    padding: 0.625rem 1rem;
    font-size: var(--font-size-sm);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    background: white;
}

.modern-input:focus {
    outline: none;
    border-color: var(--primary-600);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.modern-input:disabled {
    background: var(--gray-100);
    cursor: not-allowed;
}

.modern-input-error {
    border-color: var(--danger-500);
}

.modern-input-error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* === MODERN TABLE SYSTEM === */
.modern-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.modern-table thead {
    background: var(--gray-50);
}

.modern-table th {
    padding: 1rem 1.5rem;
    text-align: left;
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--gray-700);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--gray-200);
}

.modern-table td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    font-size: var(--font-size-sm);
}

.modern-table tbody tr {
    transition: background var(--transition-fast);
}

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

.modern-table tbody tr:last-child td {
    border-bottom: none;
}

/* === MODERN GRID SYSTEM === */
.modern-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.modern-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.modern-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.modern-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
    .modern-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .modern-grid-2,
    .modern-grid-3,
    .modern-grid-4 {
        grid-template-columns: 1fr;
    }
}

/* === MODERN ALERT SYSTEM === */
.modern-alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    border-left: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.modern-alert-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--success-500);
    color: var(--success-600);
}

.modern-alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--warning-500);
    color: var(--warning-600);
}

.modern-alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger-500);
    color: var(--danger-600);
}

.modern-alert-info {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--info-500);
    color: var(--info-600);
}

/* === MODERN MODAL SYSTEM === */
.modern-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: var(--spacing-lg);
}

.modern-modal {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalFadeIn 0.3s ease-out;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modern-modal-header {
    padding: var(--spacing-xl);
    border-bottom: 2px solid var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modern-modal-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
}

.modern-modal-close {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--gray-100);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-xl);
    color: var(--gray-600);
}

.modern-modal-close:hover {
    background: var(--danger-500);
    color: white;
}

.modern-modal-body {
    padding: var(--spacing-xl);
}

.modern-modal-footer {
    padding: var(--spacing-xl);
    border-top: 2px solid var(--gray-100);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* === MODERN STATS CARD === */
.modern-stat-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-600);
    transition: all var(--transition-base);
}

.modern-stat-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.modern-stat-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.modern-stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
}

.modern-stat-change {
    font-size: var(--font-size-sm);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.modern-stat-change.positive {
    color: var(--success-600);
}

.modern-stat-change.negative {
    color: var(--danger-600);
}

/* === MODERN TABS === */
.modern-tabs {
    display: flex;
    gap: var(--spacing-xs);
    border-bottom: 2px solid var(--gray-200);
    margin-bottom: var(--spacing-xl);
}

.modern-tab {
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--gray-600);
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    bottom: -2px;
}

.modern-tab:hover {
    color: var(--primary-600);
}

.modern-tab.active {
    color: var(--primary-600);
    border-bottom-color: var(--primary-600);
}

/* === UTILITY CLASSES === */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.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-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

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

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

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.w-full { width: 100%; }
.h-full { height: 100%; }

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

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }