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

:root {
    --bg-primary: #1c1c1e;
    --bg-secondary: #2c2c2e;
    --bg-card: #2c2c2e;
    --bg-hover: #3a3a3c;
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --accent: #007AFF;
    --accent-hover: #0056CC;
    --border: #3a3a3c;
    --green: #34C759;
    --red: #FF3B30;
    --orange: #FF9500;
    --purple: #5856D6;
    --pink: #AF52DE;
    --teal: #5AC8FA;
    --radius: 12px;
    --radius-sm: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ─── Login Page ────────────────────────────────────────────────────────────── */

.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 48px 40px;
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-card h1 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.login-card .subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 32px;
}

.login-card input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s;
    margin-bottom: 16px;
}

.login-card input:focus {
    border-color: var(--accent);
}

.login-card button {
    width: 100%;
    padding: 12px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.login-card button:hover {
    background: var(--accent-hover);
}

.login-error {
    color: var(--red);
    font-size: 14px;
    margin-top: 12px;
    display: none;
}

.login-error.visible {
    display: block;
}

/* ─── Dashboard Layout ──────────────────────────────────────────────────────── */

.dashboard {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px;
}

.dash-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.dash-header h1 {
    font-size: 28px;
    font-weight: 700;
}

.dash-header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.period-toggle {
    display: flex;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
}

.period-toggle button {
    padding: 8px 16px;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.period-toggle button.active {
    background: var(--accent);
    color: #fff;
}

.period-toggle button:hover:not(.active) {
    color: var(--text-primary);
}

.logout-btn {
    padding: 8px 20px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s;
}

.logout-btn:hover {
    color: var(--red);
    border-color: var(--red);
}

/* ─── KPI Cards ─────────────────────────────────────────────────────────────── */

.kpi-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.kpi-card .kpi-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.kpi-card .kpi-value {
    font-size: 36px;
    font-weight: 700;
    line-height: 1;
}

.kpi-card .kpi-sub {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 8px;
}

.kpi-card .kpi-sub span {
    color: var(--green);
    font-weight: 600;
}

/* ─── Cards ─────────────────────────────────────────────────────────────────── */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
}

.card h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.card-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

/* ─── Charts ────────────────────────────────────────────────────────────────── */

.chart-container {
    position: relative;
    width: 100%;
    height: 320px;
}

.chart-container-sm {
    position: relative;
    width: 100%;
    height: 220px;
}

.distributions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.distributions-grid .card {
    margin-bottom: 0;
}

/* ─── Recent Activity Table ─────────────────────────────────────────────────── */

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

.recent-table th {
    text-align: left;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}

.recent-table td {
    padding: 10px 12px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

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

.recent-table .page-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    background: rgba(0, 122, 255, 0.15);
    color: var(--accent);
}

.recent-table .country-cell {
    color: var(--text-primary);
}

.table-scroll {
    max-height: 400px;
    overflow-y: auto;
}

.table-scroll::-webkit-scrollbar {
    width: 6px;
}

.table-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.table-scroll::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

/* ─── Loading State ─────────────────────────────────────────────────────────── */

.loading-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ─── Responsive ────────────────────────────────────────────────────────────── */

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

@media (max-width: 768px) {
    .dashboard {
        padding: 16px;
    }
    .dash-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .kpi-row {
        grid-template-columns: 1fr;
    }
    .card-row {
        grid-template-columns: 1fr;
    }
    .distributions-grid {
        grid-template-columns: 1fr;
    }
    .kpi-card .kpi-value {
        font-size: 28px;
    }
}