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

body {
    font-family: system-ui, -apple-system, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.5;
}

nav {
    background: #222;
    color: #fff;
    padding: 0.75rem 1.5rem;
    display: flex;
    gap: 1.5rem;
    align-items: center;
}
nav a { color: #ccc; text-decoration: none; }
nav a:hover { color: #fff; }
.nav-right { margin-left: auto; color: #999; }

main { max-width: 960px; margin: 2rem auto; padding: 0 1rem; }

h1 { margin-bottom: 1rem; }
h2 { margin: 1.5rem 0 0.75rem; }

fieldset {
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 1rem;
    background: #fff;
}
legend { font-weight: 600; padding: 0 0.5rem; }

label { display: block; margin-bottom: 0.5rem; font-size: 0.9rem; }
input, select, textarea {
    display: block;
    width: 100%;
    padding: 0.4rem 0.6rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    font: inherit;
    margin-top: 0.2rem;
}
input[type="checkbox"] { display: inline; width: auto; }
input[type="file"] { padding: 0.3rem; }

.row { display: flex; gap: 1rem; flex-wrap: wrap; align-items: end; }
.row > label { flex: 1; min-width: 150px; }

button {
    padding: 0.5rem 1.2rem;
    background: #333;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font: inherit;
    margin-top: 0.5rem;
}
button:hover { background: #555; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.danger { background: #c33; }
button.danger:hover { background: #a22; }

.item-row {
    border: 1px solid #eee;
    border-radius: 4px;
    padding: 0.75rem;
    margin-bottom: 0.75rem;
    background: #fafafa;
}
.remove-btn { background: #999; font-size: 0.85rem; padding: 0.3rem 0.8rem; }

table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 6px; overflow: hidden; }
th, td { padding: 0.5rem 0.75rem; text-align: left; border-bottom: 1px solid #eee; }
th { background: #f0f0f0; font-weight: 600; font-size: 0.85rem; }
td { font-size: 0.9rem; }

.error { color: #c33; }
.success { color: #2a2; }

.login-box {
    max-width: 360px;
    margin: 4rem auto;
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.login-box h1 { text-align: center; margin-bottom: 1.5rem; }

.checkbox { display: flex; align-items: center; gap: 0.5rem; }