:root {
    color-scheme: light dark;
    --primary: #0D5C55;
    --on-primary: #FFFFFF;
    --primary-container: #E3EFEC;
    --on-primary-container: #0A4645;
    --background: #F6F9FF;
    --surface: #FFFFFF;
    --on-surface: #1B2523;
    --on-surface-variant: #5F6A65;
    --outline: #E4E0D8;
    --error: #C6453C;
    --error-container: #FBE9E7;
    --success: #12795A;
    --success-container: #E6F5EF;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary: #6FD9C9;
        --on-primary: #00382F;
        --primary-container: #0A4645;
        --on-primary-container: #B7EFE5;
        --background: #0C1010;
        --surface: #1A1F1F;
        --on-surface: #E6E9E6;
        --on-surface-variant: #B6BDB9;
        --outline: #292F2F;
        --error: #F2A49C;
        --error-container: #3A1A17;
        --success: #7FD8B6;
        --success-container: #12322A;
    }
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--on-surface);
    font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.site-header,
main,
.site-footer {
    max-width: 44rem;
    margin: 0 auto;
    padding: 0 16px;
}

.site-header {
    padding-top: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--on-surface);
    font-weight: 700;
    font-size: 1.25rem;
    text-decoration: none;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--primary);
    color: var(--on-primary);
    font-size: 1.1rem;
}

main {
    padding-top: 8px;
    padding-bottom: 32px;
}

h1 {
    font-size: 1.9rem;
    line-height: 1.25;
    margin: 24px 0 4px;
}

h2 {
    font-size: 1.25rem;
    margin: 32px 0 8px;
}

h3 {
    font-size: 1.05rem;
    margin: 20px 0 4px;
}

a {
    color: var(--primary);
}

.updated,
.muted {
    color: var(--on-surface-variant);
}

.card {
    background: var(--surface);
    border: 1px solid var(--outline);
    border-radius: 16px;
    padding: 16px 20px;
    margin: 16px 0;
}

.site-footer {
    border-top: 1px solid var(--outline);
    padding-top: 16px;
    padding-bottom: 32px;
    color: var(--on-surface-variant);
    font-size: 0.9rem;
}

.site-footer nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
    margin-bottom: 8px;
}

details {
    background: var(--surface);
    border: 1px solid var(--outline);
    border-radius: 12px;
    margin: 8px 0;
}

summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
}

summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: "";
    flex: none;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--on-surface-variant);
    border-bottom: 2px solid var(--on-surface-variant);
    transform: rotate(45deg);
    transition: transform 0.2s;
}

details[open] > summary::after {
    transform: rotate(-135deg);
}

details > :not(summary) {
    margin: 0;
    padding: 0 16px 14px;
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0;
}

.tabs a {
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid var(--outline);
    background: var(--surface);
    text-decoration: none;
}

label {
    display: block;
    font-weight: 600;
    margin: 12px 0 4px;
}

input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--outline);
    border-radius: 10px;
    background: var(--background);
    color: var(--on-surface);
    font: inherit;
}

button {
    font: inherit;
    font-weight: 600;
    border: 0;
    border-radius: 999px;
    padding: 12px 20px;
    cursor: pointer;
}

button:disabled {
    opacity: 0.6;
    cursor: default;
}

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

.button-danger {
    background: var(--error);
    color: var(--surface);
}

.button-quiet {
    background: transparent;
    color: var(--primary);
    padding-left: 0;
    padding-right: 0;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-top: 16px;
}

.message {
    border-radius: 10px;
    padding: 12px 14px;
    margin: 12px 0 0;
}

.message-error {
    background: var(--error-container);
    color: var(--error);
}

.message-success {
    background: var(--success-container);
    color: var(--success);
}

.divider {
    text-align: center;
    color: var(--on-surface-variant);
    margin: 16px 0 4px;
}

[hidden] {
    display: none !important;
}