/* 
 * Modern Dashboard Styles - Best Practices Implementation
 * Following design principles from leading analytics platforms
 */

:root {
    /* Color Palette - Professional & Modern */
    --primary-blue: #1976d2;
    --primary-blue-dark: #0d47a1;
    --primary-blue-light: #42a5f5;
    
    --accent-coral: #ff6b6b;
    --accent-green: #51cf66;
    --accent-yellow: #ffd93d;
    --accent-purple: #a78bfa;
    
    --success-green: #2e7d32;
    --warning-orange: #ef6c00;
    --danger-red: #c62828;
    --info-blue: #1976d2;
    
    --neutral-50: #fafafa;
    --neutral-100: #f5f5f5;
    --neutral-200: #eeeeee;
    --neutral-300: #e0e0e0;
    --neutral-400: #bdbdbd;
    --neutral-500: #9e9e9e;
    --neutral-600: #757575;
    --neutral-700: #616161;
    --neutral-800: #424242;
    --neutral-900: #212121;
    
    /* Spacing Scale */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Helvetica Neue', sans-serif;
    --font-mono: 'Monaco', 'Courier New', monospace;
}

/* Base Dashboard Styles */
body {
    background: var(--neutral-100);
    font-family: var(--font-sans);
    color: var(--neutral-800);
    line-height: 1.6;
}

/* Dashboard Hero Banner */
.dashboard-hero-modern {
    background: linear-gradient(135deg, var(--primary-blue-dark) 0%, var(--primary-blue) 100%);
    color: white;
    padding: var(--space-2xl) var(--space-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.dashboard-hero-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255,255,255,0.05) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.05) 75%, rgba(255,255,255,0.05)),
                linear-gradient(45deg, rgba(255,255,255,0.05) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.05) 75%, rgba(255,255,255,0.05));
    background-size: 60px 60px;
    background-position: 0 0, 30px 30px;
    opacity: 0.3;
}

.dashboard-hero-modern h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    position: relative;
}

.dashboard-hero-modern p {
    font-size: 1.125rem;
    opacity: 0.95;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

/* Modern Card Styles */
.card-modern {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    transition: all var(--transition-base);
    border: 1px solid var(--neutral-200);
    position: relative;
    overflow: hidden;
}

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

.card-modern.card-accent-top {
    border-top: 4px solid var(--primary-blue);
}

.card-modern.card-accent-left {
    border-left: 4px solid var(--primary-blue);
}

/* Metric Cards */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.metric-card-modern {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border-left: 4px solid var(--primary-blue);
    position: relative;
    overflow: hidden;
}

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

.metric-card-modern::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(25, 118, 210, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(30%, -30%);
}

.metric-icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    opacity: 0.8;
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--neutral-900);
    margin: var(--space-sm) 0;
    line-height: 1;
}

.metric-label {
    font-size: 0.875rem;
    color: var(--neutral-600);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-xs);
}

.metric-change {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 0.875rem;
    font-weight: 600;
    margin-top: var(--space-sm);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.metric-change.positive {
    color: var(--success-green);
    background: rgba(46, 125, 50, 0.1);
}

.metric-change.negative {
    color: var(--danger-red);
    background: rgba(198, 40, 40, 0.1);
}

.metric-change.neutral {
    color: var(--neutral-600);
    background: rgba(158, 158, 158, 0.1);
}

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-badge.status-success {
    background: rgba(46, 125, 50, 0.15);
    color: var(--success-green);
}

.status-badge.status-warning {
    background: rgba(239, 108, 0, 0.15);
    color: var(--warning-orange);
}

.status-badge.status-danger {
    background: rgba(198, 40, 40, 0.15);
    color: var(--danger-red);
}

.status-badge.status-info {
    background: rgba(25, 118, 210, 0.15);
    color: var(--info-blue);
}

/* Chart Container */
.chart-container-modern {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-xl);
    border: 1px solid var(--neutral-200);
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--neutral-200);
}

.chart-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--neutral-900);
}

.chart-subtitle {
    font-size: 0.875rem;
    color: var(--neutral-600);
    margin-top: var(--space-xs);
}

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

.table-modern thead {
    background: var(--neutral-100);
}

.table-modern th {
    padding: var(--space-lg);
    text-align: left;
    font-weight: 600;
    color: var(--neutral-700);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--neutral-300);
}

.table-modern td {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--neutral-200);
    color: var(--neutral-800);
}

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

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

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

/* Buttons */
.btn-modern {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

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

.btn-modern:active {
    transform: translateY(0);
}

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

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

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

.btn-success:hover {
    background: #1b5e20;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-blue);
    color: var(--primary-blue);
    box-shadow: none;
}

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

/* Input Fields */
.input-modern {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    border: 2px solid var(--neutral-300);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: white;
}

.input-modern:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.input-modern::placeholder {
    color: var(--neutral-400);
}

/* Loading States */
.skeleton {
    background: linear-gradient(90deg, var(--neutral-200) 25%, var(--neutral-100) 50%, var(--neutral-200) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--neutral-200);
    border-top-color: var(--primary-blue);
    border-radius: 50%;
    animation: spinner-rotate 0.8s linear infinite;
}

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

/* Tooltips */
.tooltip {
    position: relative;
    cursor: help;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-sm) var(--space-md);
    background: var(--neutral-900);
    color: white;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
    box-shadow: var(--shadow-lg);
}

.tooltip:hover::after {
    opacity: 1;
}

/* Alert Boxes */
.alert-modern {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-xl);
    display: flex;
    align-items: start;
    gap: var(--space-md);
    border-left: 4px solid;
}

.alert-success {
    background: rgba(46, 125, 50, 0.1);
    border-color: var(--success-green);
    color: #1b5e20;
}

.alert-warning {
    background: rgba(239, 108, 0, 0.1);
    border-color: var(--warning-orange);
    color: #e65100;
}

.alert-danger {
    background: rgba(198, 40, 40, 0.1);
    border-color: var(--danger-red);
    color: #b71c1c;
}

.alert-info {
    background: rgba(25, 118, 210, 0.1);
    border-color: var(--info-blue);
    color: #0d47a1;
}

/* Responsive Grid */
.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .dashboard-hero-modern h1 { font-size: 2rem; }
    .metric-value { font-size: 2rem; }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

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

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