/* ============================================================
   Dashboard Brand — Design System
   Clean, simple, easy-to-read reporting dashboard
   ============================================================ */

:root {
    /* Colors */
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d27;
    --bg-card: #1e2130;
    --bg-card-hover: #252840;
    --border: #2a2d3e;
    --border-subtle: #1f2233;

    --text-primary: #e8eaed;
    --text-secondary: #9aa0b0;
    --text-muted: #636880;

    --accent-blue: #5b8def;
    --accent-blue-muted: rgba(91, 141, 239, 0.15);
    --accent-green: #34d399;
    --accent-green-muted: rgba(52, 211, 153, 0.15);
    --accent-red: #f87171;
    --accent-red-muted: rgba(248, 113, 113, 0.15);
    --accent-amber: #fbbf24;
    --accent-purple: #a78bfa;

    /* Chart palette */
    --chart-1: #5b8def;
    --chart-2: #34d399;
    --chart-3: #a78bfa;
    --chart-4: #fbbf24;
    --chart-5: #f87171;

    /* Typography */
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --text-xs: 0.75rem;
    --text-sm: 0.8125rem;
    --text-base: 0.9375rem;
    --text-lg: 1.125rem;
    --text-xl: 1.5rem;
    --text-2xl: 2rem;
    --text-3xl: 2.5rem;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* Shadows */
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-elevated: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* ============================================================
   Reset & Base
   ============================================================ */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* ============================================================
   Header
   ============================================================ */

#dashboard-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: var(--space-lg) var(--space-xl);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.header-inner {
    max-width: 1440px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

#dashboard-title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.domain-select {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    font-size: var(--text-sm);
    font-family: var(--font);
    font-weight: 600;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239aa0b0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 28px;
    transition: border-color 0.2s ease;
}

.domain-select:hover {
    border-color: var(--accent-blue);
}

.domain-select:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px var(--accent-blue-muted);
}

.header-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.date-controls {
    display: flex;
    align-items: center;
    gap: 6px;
}

.date-input {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 5px 10px;
    font-size: 12px;
    font-family: var(--font);
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.date-input:hover {
    border-color: var(--accent-blue);
}

.date-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 2px var(--accent-blue-muted);
}

.date-input::-webkit-calendar-picker-indicator {
    filter: invert(0.7);
    cursor: pointer;
}

.date-separator {
    color: var(--text-muted);
    font-size: 14px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s ease-in-out infinite;
}

.status-dot.error {
    background: var(--accent-red);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ============================================================
   Dashboard Grid
   ============================================================ */

.dashboard-grid {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--space-xl);
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

/* ============================================================
   Card Base
   ============================================================ */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-card);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    border-color: var(--border-subtle);
    box-shadow: var(--shadow-elevated);
}

.card-title {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-md);
}

/* Width classes */
.card.width-quarter { grid-column: span 1; }
.card.width-half { grid-column: span 2; }
.card.width-full { grid-column: span 4; }

/* ============================================================
   Scorecard Component
   ============================================================ */

.scorecard .scorecard-value {
    font-size: var(--text-3xl);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.scorecard .scorecard-loading {
    height: 40px;
    width: 120px;
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-card-hover) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

/* ============================================================
   Chart Components
   ============================================================ */

.chart-container {
    position: relative;
    width: 100%;
    height: 280px;
}

.chart-container canvas {
    width: 100% !important;
    height: 100% !important;
}

.chart-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 280px;
    color: var(--text-muted);
    font-size: var(--text-sm);
}

/* ============================================================
   DataTable Component
   ============================================================ */

.data-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-sm);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.data-table thead th {
    text-align: left;
    padding: var(--space-sm) var(--space-md);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    transition: color 0.15s ease;
}

.data-table thead th:hover {
    color: var(--text-primary);
}

.data-table thead th.numeric {
    text-align: right;
}

.data-table tbody td {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-primary);
    white-space: nowrap;
}

.data-table tbody td.numeric {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.data-table tbody td.url {
    max-width: 400px;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--accent-blue);
}

.data-table tbody tr {
    transition: background 0.15s ease;
}

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

/* ============================================================
   Empty / Error States
   ============================================================ */

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    color: var(--text-muted);
    font-size: var(--text-sm);
    text-align: center;
    gap: var(--space-sm);
}

.empty-state .empty-icon {
    font-size: var(--text-2xl);
    opacity: 0.3;
}

.error-state {
    color: var(--accent-red);
    font-size: var(--text-sm);
    padding: var(--space-md);
    background: var(--accent-red-muted);
    border-radius: var(--radius-sm);
}

/* ============================================================
   Shimmer Loading Animation
   ============================================================ */

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

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .card.width-quarter { grid-column: span 1; }
    .card.width-half { grid-column: span 2; }
    .card.width-full { grid-column: span 2; }
}

@media (max-width: 640px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
        padding: var(--space-md);
        gap: var(--space-md);
    }
    .card.width-quarter,
    .card.width-half,
    .card.width-full {
        grid-column: span 1;
    }

    #dashboard-header {
        padding: var(--space-md);
    }

    #dashboard-title {
        font-size: var(--text-lg);
    }

    .scorecard .scorecard-value {
        font-size: var(--text-2xl);
    }

    .chart-container {
        height: 220px;
    }
}

/* ============================================================
   Buttons & Modal
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
}

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

.btn-outline:hover {
    background: var(--bg-card-hover);
    border-color: var(--border);
}

.btn-connect {
    background: var(--accent-blue);
    color: #fff;
}

.btn-connect:hover {
    background: #4a7be0;
}

.hidden {
    display: none !important;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 500px;
    box-shadow: var(--shadow-elevated);
    overflow: hidden;
}

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

.modal-header h2 {
    font-size: var(--text-lg);
    font-weight: 600;
}

.btn-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
}

.modal-body {
    padding: var(--space-lg);
}

.integration-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-subtle);
}

.integration-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.integration-title {
    font-weight: 600;
    font-size: var(--text-base);
    color: var(--text-primary);
}

.integration-desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    margin-top: 4px;
}

.status-badge {
    background: var(--accent-green-muted);
    color: var(--accent-green);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
}