:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
    --danger: #ef4444;
    --success: #10b981;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.navbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card {
    background: var(--card-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

.btn {
    background-color: var(--primary);
    color: white;
    padding: 8px 16px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-weight: 500;
}

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

.btn-danger {
    background-color: var(--danger);
}

.input-field {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-top: 6px;
    margin-bottom: 16px;
    box-sizing: border-box;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}

th, td {
    border: 1px solid var(--border-color);
    padding: 12px;
    text-align: left;
}

th {
    background-color: #f1f5f9;
}