:root {
    --sidebar-bg: #1a2332;
    --sidebar-bg-hover: #232f42;
    --sidebar-text: #a9b4c4;
    --sidebar-text-active: #ffffff;
    --accent: #2a78d6;
    --accent-light: #e6f1fb;
    --page-bg: #f4f6f9;
    --card-bg: #ffffff;
    --border: #e3e7ed;
    --text-primary: #1a2332;
    --text-secondary: #6b7280;
    --text-muted: #9aa3b1;
    --success: #1d9e75;
    --success-bg: #e1f5ee;
    --warning: #ba7517;
    --warning-bg: #faeeda;
    --danger: #d85a30;
    --danger-bg: #faece7;
    --info: #378add;
    --info-bg: #e6f1fb;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--page-bg);
    color: var(--text-primary);
}

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

.sidebar {
    width: 220px;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    padding: 1.25rem 1rem;
    flex-shrink: 0;
}

.sidebar .brand {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 1.75rem;
    padding: 0 0.5rem;
}

.sidebar nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 4px;
    transition: background 0.15s ease;
}

.sidebar nav a:hover { background: var(--sidebar-bg-hover); color: #fff; }

.sidebar nav a.active {
    background: var(--accent);
    color: #fff;
}

.main { flex: 1; padding: 1.75rem 2rem; }

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.page-header h1 { font-size: 20px; font-weight: 600; margin: 0; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--card-bg);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.btn-primary:hover { background: #1f63b8; }
.btn:hover { background: var(--page-bg); }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem 1.1rem;
}

.stat-card .label { font-size: 13px; color: var(--text-secondary); margin: 0 0 6px; }
.stat-card .value { font-size: 26px; font-weight: 600; margin: 0; }

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.1rem 1.25rem;
    margin-bottom: 1.25rem;
}

.card .card-title {
    font-weight: 600;
    font-size: 15px;
    margin: 0 0 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
    text-align: left;
    font-weight: 500;
    color: var(--text-secondary);
    padding: 8px 6px;
    border-bottom: 1px solid var(--border);
}
tbody td { padding: 10px 6px; border-bottom: 1px solid var(--border); }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--page-bg); }

.badge {
    display: inline-block;
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-neutral { background: #eef0f3; color: var(--text-secondary); }

.muted { color: var(--text-muted); }
.empty-state { text-align: center; padding: 2.5rem 1rem; color: var(--text-muted); }

.filters { display: flex; gap: 8px; margin-bottom: 1rem; flex-wrap: wrap; }
.filters a {
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
}
.filters a.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 13px; color: var(--text-secondary); }
.form-group input, .form-group select {
    padding: 9px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 14px;
    background: var(--card-bg);
    color: var(--text-primary);
}
.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--accent);
}
.form-actions { margin-top: 1.25rem; display: flex; gap: 10px; }

.messages { list-style: none; padding: 0; margin: 0 0 1rem; }
.messages li {
    padding: 10px 14px;
    border-radius: 8px;
    background: var(--success-bg);
    color: var(--success);
    font-size: 14px;
    margin-bottom: 8px;
}

.avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 600;
    flex-shrink: 0;
}

.client-name-cell { display: flex; align-items: center; gap: 10px; }