:root {
    --bg-color: #f3f5f8;
    --sidebar-bg: #1e2532;
    --card-bg: #ffffff;
    --primary: #2563eb;
    --primary-soft: #dbeafe;
    --success: #10b981;
    --success-soft: #d1fae5;
    --warning: #f59e0b;
    --warning-soft: #fef3c7;
    --danger: #ef4444;
    --danger-soft: #fee2e2;
    --text-main: #334155;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    overflow-x: hidden;
}

/* Layout */
.app-layout {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: white;
    display: flex;
    flex-direction: column;
}
.sidebar-brand {
    padding: 24px;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}
.sidebar-nav {
    list-style: none;
    padding: 16px 0;
    margin: 0;
}
.sidebar-nav li {
    padding: 12px 24px;
    cursor: pointer;
    color: #cbd5e1;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 12px;
}
.sidebar-nav li:hover, .sidebar-nav li.active {
    background-color: rgba(255,255,255,0.05);
    color: white;
    border-left: 4px solid var(--primary);
}

/* Main Content & Topbar */
.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}
.topbar {
    background-color: var(--card-bg);
    padding: 16px 32px;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
}
.content-area {
    padding: 32px;
}
.queue-select {
    width: 200px;
    background-color: var(--bg-color);
    border: none;
}

/* Dashboard Cards */
.kpi-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.03);
    border: 1px solid var(--border-color);
}
.kpi-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}
.kpi-details { flex-grow: 1; }
.kpi-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
}
.kpi-value {
    margin: 0;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
}

/* Utility Colors */
.bg-primary-soft { background-color: var(--primary-soft); color: var(--primary); }
.bg-warning-soft { background-color: var(--warning-soft); color: #b45309; }
.bg-success-soft { background-color: var(--success-soft); color: var(--success); }
.bg-info-soft { background-color: #e0f2fe; color: #0284c7; }
.bg-danger-soft { background-color: var(--danger-soft); color: var(--danger); }

/* Custom SaaS Card */
.saas-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.03);
    border: 1px solid var(--border-color);
}
.card-title {
    font-weight: 600;
    color: var(--text-main);
}

/* Datatable */
.saas-table th {
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 12px;
}
.saas-table td {
    padding: 16px 8px;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--border-color);
}
.saas-table tbody tr:hover {
    background-color: #f8fafc;
    cursor: pointer;
}
.badge-soft {
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.75rem;
}

/* Ticket Thread */
.thread-container {
    height: 50vh;
    overflow-y: auto;
    padding-right: 10px;
}
.msg-bubble {
    padding: 16px;
    margin-bottom: 20px;
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.5;
    max-width: 85%;
    position: relative;
}
.customer-msg {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    margin-right: auto;
    border-bottom-left-radius: 2px;
}
.agent-msg {
    background-color: var(--primary-soft);
    border: 1px solid #bfdbfe;
    color: #1e3a8a;
    margin-left: auto;
    border-bottom-right-radius: 2px;
}
.msg-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
}
.agent-msg .msg-meta { color: #3b82f6; }

/* Chart */
.chart-container {
    position: relative;
    height: 250px;
    width: 100%;
}