:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --border: #334155;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border);
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
}

.brand {
    padding: 0 20px 20px 20px;
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-item {
    padding: 12px 20px;
    color: var(--text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-item:hover, .nav-item.active {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    border-right: 3px solid var(--accent);
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 30px 40px;
    overflow-y: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.header h1 {
    font-size: 28px;
    font-weight: 600;
}

.refresh-btn {
    background-color: var(--accent);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.refresh-btn:hover {
    background-color: var(--accent-hover);
}

/* Cards / Metrics */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.metric-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-5px);
}

.metric-title {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 10px;
    font-weight: 500;
}

.metric-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-main);
}

.metric-status {
    font-size: 12px;
    margin-top: 8px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.status-good { color: var(--success); }
.status-bad { color: var(--danger); }

/* Charts */
.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.chart-container {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
}

/* Tables */
.table-container {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    overflow-x: auto;
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

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

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

th {
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.05em;
}

tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.badge {
    padding: 4px 8px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-spam { background-color: rgba(239, 68, 68, 0.2); color: #fca5a5; }
.badge-normal { background-color: rgba(16, 185, 129, 0.2); color: #6ee7b7; }
.badge-toxic { background-color: rgba(245, 158, 11, 0.2); color: #fcd34d; }

/* Export Button */
.export-btn {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 8px 15px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

.export-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Loading Overlay */
#loader {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    color: var(--accent);
    font-size: 20px;
    font-weight: 600;
    flex-direction: column;
    gap: 15px;
}
.spinner {
    width: 50px; height: 50px;
    border: 5px solid rgba(59, 130, 246, 0.3);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { 100% { transform: rotate(360deg); } }

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
}

.modal-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 30px;
    width: 90%;
    max-width: 450px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

.date-input {
    width: 100%;
    background-color: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 10px;
    border-radius: 6px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

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

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 99999;
}
.toast.show { opacity: 1; }
.toast.error { background-color: #ef4444; }