:root {
    color-scheme: light dark;
    font-family: Segoe UI, system-ui, sans-serif;
    line-height: 1.5;
}

body {
    margin: 0;
    background: #0f1419;
    color: #e7ecf3;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #2a3441;
}

.brand, nav a {
    color: #8ec5ff;
    text-decoration: none;
    margin-left: 1rem;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.hero h1, section h1 {
    margin-top: 0;
}

.hint {
    color: #9aa7b8;
}

.card, table {
    background: #171e27;
    border: 1px solid #2a3441;
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.5rem;
    text-align: left;
    border-bottom: 1px solid #2a3441;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    border: 1px solid #3a4a5c;
    background: #1f2a37;
    color: #e7ecf3;
    cursor: pointer;
    text-decoration: none;
}

.btn.primary {
    background: #2563eb;
    border-color: #2563eb;
}

.btn.danger {
    background: #7f1d1d;
    border-color: #991b1b;
}

input {
    display: block;
    width: 100%;
    max-width: 24rem;
    margin: 0.5rem 0 1rem;
    padding: 0.5rem;
    border-radius: 6px;
    border: 1px solid #3a4a5c;
    background: #0f1419;
    color: inherit;
}

pre {
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
}

.alert.success {
    background: #14532d;
    border: 1px solid #166534;
}

.alert.error {
    background: #7f1d1d;
    border: 1px solid #991b1b;
}

.error-details {
    margin: 0.5rem 0 0;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 0.9rem;
}