body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f5f5f5;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1024px;
    margin: 20px auto;
    padding: 0 15px;
}

.navbar {
    background: #ffffff;
    border-bottom: 1px solid #ddd;
    padding: 10px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-brand .logo {
    height: 30px;
}

.navbar-menu {
    list-style: none;
    display: flex;
    gap: 15px;
    margin: 0;
    padding: 0;
}

.navbar-menu a {
    text-decoration: none;
    color: #333;
}

.alert {
    padding: 10px 12px;
    border-radius: 3px;
    margin-bottom: 10px;
}

.alert-success {
    background: #e0ffe8;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-error {
    background: #fee2e2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

.btn, .btn-sm, .btn-danger, .btn-link {
    display: inline-block;
    padding: 6px 10px;
    border-radius: 3px;
    border: 1px solid var(--primary-color);
    background: var(--primary-color);
    color: #fff;
    text-decoration: none;
    cursor: pointer;
    font-size: 14px;
}

.btn-sm {
    padding: 3px 6px;
    font-size: 12px;
}

.btn-danger {
    background: #dc2626;
    border-color: #b91c1c;
}

.btn-link {
    border: none;
    background: transparent;
    color: var(--primary-color);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

.table th,
.table td {
    border: 1px solid #e5e7eb;
    padding: 8px;
    font-size: 14px;
}

.card {
    background: #fff;
    border-radius: 4px;
    border: 1px solid #e5e7eb;
    padding: 10px;
}

.card-title {
    font-size: 14px;
    color: #6b7280;
}

.card-value {
    font-size: 20px;
    font-weight: bold;
    margin-top: 5px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(200px,1fr));
    gap: 10px;
}

input[type="text"],
input[type="email"],
input[type="number"],
input[type="password"],
textarea,
select {
    width: 100%;
    border: 1px solid #d1d5db;
    border-radius: 3px;
    padding: 6px;
    font-size: 14px;
}

form {
    margin-top: 10px;
}