:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --border: #334155;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    height: 64px;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand {
    font-weight: 700;
    font-size: 1.25rem;
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.btn-logout {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

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

.main-content {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
}

/* Login Section */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 80vh;
}

.login-card {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    max-width: 400px;
    width: 100%;
}

.login-card h1 {
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Dashboard Section */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.stat-card h3 {
    margin: 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-card .value {
    font-size: 2rem;
    font-weight: 700;
    margin: 0.5rem 0;
}

.trend {
    font-size: 0.875rem;
}

.trend.up {
    color: var(--success);
}

.trend.stable {
    color: var(--text-secondary);
}

.content-area {
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-placeholder {
    color: var(--text-secondary);
    font-style: italic;
}

/* Details Section Details */
.details-section {
    margin-top: 2rem;
    background: var(--card-bg);
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
}

.tab-nav {
    display: flex;
    border-bottom: 1px solid var(--border);
    background: rgba(30, 41, 59, 0.5);
}

.tab-btn {
    padding: 1rem 2rem;
    border: none;
    background: none;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
    font-family: var(--font-family);
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
    background: var(--card-bg);
}

.tab-content {
    display: none;
    padding: 1.5rem;
}

.tab-content.active {
    display: block;
}

.tab-content h4 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table th,
.data-table td {
    text-align: left;
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.data-table th {
    background: rgba(30, 41, 59, 0.5);
    font-weight: 600;
    color: var(--text-primary);
}

.data-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.url-cell {
    max-width: 500px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: inline-block;
    vertical-align: middle;
}
/* Mobile Responsiveness (Max Width 768px) */
@media (max-width: 768px) {
    /* 1. Adjust Layout Padding */
    .main-content {
        padding: 1rem;
    }
    .navbar {
        padding: 0 1rem;
    }

    /* 2. Stack Dashboard Header */
    .dashboard-header {
        flex-direction: column;
        align-items: stretch;
        gap: 1.5rem;
    }

    .date-filter {
        display: flex;
        flex-direction: column;
        gap: 0.8rem;
        width: 100%;
    }

    .date-filter label {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        color: var(--text-secondary);
    }
    
    .date-filter input {
        background: var(--card-bg);
        border: 1px solid var(--border);
        color: var(--text-primary);
        padding: 0.5rem;
        border-radius: 6px;
    }
    
    .date-filter button {
        width: 100%;
        padding: 0.75rem;
        background: var(--accent);
        color: white;
        border: none;
        border-radius: 6px;
        font-weight: 600;
        cursor: pointer;
    }

    /* 3. Responsive Stats Grid */
    /* Handled by auto-fit, but we can tweak margins if needed */
    .stats-grid {
        gap: 1rem;
        margin-bottom: 1.5rem;
    }

    /* 4. Scrollable Tabs */
    .tab-nav {
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        background: var(--card-bg); /* Match bg for smoothness */
    }

    .tab-btn {
        flex: 0 0 auto;
        padding: 1rem;
        font-size: 0.9rem;
    }

    /* 5. Scrollable Tables */
    .tab-content {
        padding: 1rem;
        overflow-x: auto; /* Allow horizontal scroll for table containers */
    }

    .data-table {
        min-width: 600px; /* Ensure table columns don't collapse */
    }
    
    /* Adjust URL cell width for mobile */
    .url-cell {
        max-width: 150px;
    }
    
    /* 6. Map Adjustment */
    #regions_div {
        height: 300px !important; /* Slightly shorter on mobile */
    }
}