:root {
    --primary: #2f6fed;
    --bg: #f5f7fb;
    --card-radius: 18px;
}

body {
    background: var(--bg);
    font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
}

.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    background: #ffffff;
    border-right: 1px solid #eef1f6;
    padding: 32px 20px;
}

.sidebar-brand {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--primary);
}

.sidebar .nav-link {
    color: #4a5568;
    font-weight: 500;
    border-radius: 12px;
    padding: 10px 14px;
    margin-bottom: 6px;
}

.sidebar .nav-link:hover {
    background: #f0f4ff;
    color: var(--primary);
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    padding: 20px 32px;
    background: #ffffff;
    border-bottom: 1px solid #eef1f6;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar-user {
    color: #6b7280;
}

.content {
    padding: 32px;
    flex: 1;
}

.card {
    border: none;
    border-radius: var(--card-radius);
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}

.summary-card {
    padding: 10px;
}

.summary-card h6 {
    color: #6b7280;
    font-weight: 600;
}

.auth-card {
    max-width: 460px;
    margin: 40px auto;
}

.ticket-thread {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.ticket-reply {
    padding: 16px;
    border-radius: 16px;
    background: #f8fafc;
}

.reply-admin {
    background: #eef5ff;
    border-left: 4px solid var(--primary);
}

.reply-client {
    background: #f8fafc;
}

.reply-meta {
    font-size: 0.85rem;
    color: #6b7280;
    margin-bottom: 6px;
}

.footer {
    padding: 20px 32px;
    text-align: center;
    font-size: 0.9rem;
    color: #6b7280;
    border-top: 1px solid #eef1f6;
    background: #ffffff;
}

@media (max-width: 992px) {
    .layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid #eef1f6;
    }

    .content {
        padding: 20px;
    }
}