:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #64748b;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-color: #1f2937;
    --danger-color: #ef4444;
    --success-color: #10b981;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
}

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

.card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

h1, h2, h3 {
    margin-bottom: 1rem;
    color: #111827;
}

input, select, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 1rem;
}

button {
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    font-size: 1rem;
    transition: background-color 0.2s;
}

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

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

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

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #e5e7eb;
}

th {
    background-color: #f9fafb;
    font-weight: 600;
}