*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #f5f7fa;
    --sidebar-bg: #1a1f36;
    --sidebar-text: #a3aed0;
    --sidebar-active: #fff;
    --card-bg: #fff;
    --text: #2d3748;
    --text-muted: #718096;
    --border: #e2e8f0;
    --primary: #4f46e5;
    --primary-light: #eef2ff;
    --success: #16a34a;
    --success-bg: #dcfce7;
    --danger: #dc2626;
    --danger-bg: #fee2e2;
    --warning: #d97706;
    --warning-bg: #fef3c7;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    background: var(--sidebar-bg);
    padding: 24px 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.logo { padding: 0 24px 24px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.logo h2 { color: #fff; font-size: 18px; line-height: 1.4; }

.sidebar ul { list-style: none; margin-top: 16px; }
.sidebar li a {
    display: block;
    padding: 12px 24px;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s;
}
.sidebar li a:hover { color: #fff; background: rgba(255,255,255,0.05); }
.sidebar li a.active { color: var(--sidebar-active); background: rgba(79,70,229,0.3); border-right: 3px solid var(--primary); }

.content {
    margin-left: 240px;
    padding: 32px;
    flex: 1;
    min-width: 0;
}

h1 { font-size: 24px; margin-bottom: 24px; }
h2 { font-size: 18px; margin-bottom: 16px; }
h3 { font-size: 15px; margin-bottom: 8px; }

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.stat-card .label { font-size: 13px; color: var(--text-muted); margin-bottom: 4px; }
.stat-card .value { font-size: 28px; font-weight: 700; }

.alert {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}
.alert a { color: inherit; font-weight: 600; }
.alert-warning { background: var(--warning-bg); color: var(--warning); }
.alert-success { background: var(--success-bg); color: var(--success); }
.alert-danger { background: var(--danger-bg); color: var(--danger); }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
th { font-weight: 600; color: var(--text-muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; white-space: nowrap; }
tr:hover td { background: #f8fafc; }

.table-wrap { overflow-x: auto; }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-primary { background: var(--primary-light); color: var(--primary); }

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 8px;
    border: none;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #4338ca; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #15803d; }
.btn-sm { padding: 6px 14px; font-size: 13px; }

.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-muted); }
.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { outline: none; border-color: var(--primary); }

.form-group input[type="file"] { font-size: 14px; }

.variant-group {
    border: 1px solid var(--border);
    border-radius: 12px;
    margin-bottom: 16px;
    overflow: hidden;
}
.variant-group-header {
    padding: 14px 18px;
    background: #f8fafc;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}
.variant-group-header:hover { background: #f1f5f9; }
.variant-group-header h3 { margin: 0; }
.variant-group-body { display: none; padding: 0; }
.variant-group-body.open { display: block; }

.mismatch { background: var(--danger-bg) !important; }

.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
}

.search-bar {
    margin-bottom: 20px;
}
.search-bar input {
    width: 100%;
    max-width: 400px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
}
.search-bar input:focus { outline: none; border-color: var(--primary); }

.flex-between { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }

.mapping-row {
    display: grid;
    grid-template-columns: 1fr 40px 1fr;
    gap: 8px;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}
.mapping-row .arrow { text-align: center; color: var(--text-muted); font-size: 18px; }

.preview-section { margin-top: 20px; }

@media (max-width: 768px) {
    .sidebar { width: 100%; height: auto; position: relative; }
    .content { margin-left: 0; }
    body { flex-direction: column; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
}