/* The same content, with three presentation choices. */
.appearance-toggle svg { width: 18px; height: 18px; }
.appearance-dialog {
    width: min(760px, calc(100vw - 40px)); max-height: calc(100dvh - 40px); margin: auto;
    padding: 0; overflow-y: auto; border: 1px solid var(--line); background: var(--surface); color: var(--ink);
    box-shadow: 0 24px 80px #080a0f40;
}
.appearance-dialog::backdrop { background: #080a0f80; }
.appearance-dialog__content { position: relative; margin: 0; padding: 34px 30px 26px; text-align: center; }
.appearance-dialog__close { position: absolute; top: 12px; right: 12px; width: 30px; height: 30px; padding: 6px; }
.appearance-dialog__symbol { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; margin-bottom: 14px; color: var(--accent); background: var(--accent-soft); }
.appearance-dialog__symbol svg { width: 24px; height: 24px; }
.appearance-dialog h2 { margin: 0 0 8px; font-size: 26px; font-weight: 600; line-height: 1.3; }
.appearance-dialog p { margin: 0 0 24px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.layout-mode-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; min-inline-size: 0; padding: 0; margin: 0; border: 0; text-align: left; }
.layout-mode-card { position: relative; display: flex; flex-direction: column; min-width: 0; padding: 15px 14px 17px; border: 2px solid var(--line); background: var(--paper); color: var(--ink); cursor: pointer; transition: border-color .18s ease, background .18s ease; }
.layout-mode-card:hover { border-color: var(--muted); background: var(--surface-raised); }
.layout-mode-card[data-selected="true"], .layout-mode-card:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.layout-mode-card:focus-within { outline: 2px solid var(--accent); outline-offset: 3px; }
.layout-mode-card input[type="radio"] { position: absolute; top: 14px; right: 14px; z-index: 1; width: 17px; height: 17px; margin: 0; padding: 0; accent-color: var(--accent); cursor: pointer; }
.layout-mode-card__preview { display: block; margin: 17px 0 15px; color: var(--accent); }
.layout-mode-card__preview svg { display: block; width: 100%; height: auto; }
.layout-mode-card__title { display: block; margin-bottom: 7px; font-size: 14px; font-weight: 600; line-height: 1.45; }
.layout-mode-card__description { display: block; color: var(--muted); font-size: 11px; line-height: 1.75; }
.appearance-dialog__footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-top: 22px; margin-top: 23px; border-top: 1px solid var(--line); text-align: left; }
.appearance-dialog .layout-mode-status { margin: 0; max-width: 440px; color: var(--muted); font-size: 11px; line-height: 1.7; }
.appearance-dialog .button { min-width: 116px; }
.publication:has(.appearance-dialog[open]) { overflow: hidden; }
@media (min-width: 851px) and (max-width: 1380px) {
    .masthead { flex-wrap: wrap; row-gap: 0; padding-top: 12px; }
    .main-navigation { order: 3; flex-basis: 100%; min-height: 44px; }
    .header-actions { margin-left: auto; }
}
@media (max-width: 640px) {
    .appearance-dialog { width: calc(100vw - 24px); max-height: calc(100dvh - 24px); }
    .appearance-dialog__content { padding: 27px 18px 20px; }
    .appearance-dialog__symbol { width: 36px; height: 36px; margin-bottom: 10px; }
    .appearance-dialog__symbol svg { width: 21px; height: 21px; }
    .appearance-dialog h2 { font-size: 23px; }
    .appearance-dialog p { margin-bottom: 18px; font-size: 12px; }
    .layout-mode-grid { grid-template-columns: minmax(0, 1fr); gap: 11px; }
    .layout-mode-card { display: grid; grid-template-columns: 96px minmax(0, 1fr); column-gap: 15px; align-items: start; padding: 14px; }
    .layout-mode-card__preview { grid-column: 1; grid-row: 1 / 3; align-self: center; margin: 0; }
    .layout-mode-card__title { grid-column: 2; padding-right: 24px; margin-bottom: 5px; font-size: 14px; }
    .layout-mode-card__description { grid-column: 2; font-size: 11px; line-height: 1.65; }
    .appearance-dialog__footer { align-items: flex-start; gap: 14px; padding-top: 17px; margin-top: 18px; }
    .appearance-dialog .button { min-width: 88px; padding-inline: 16px; }
}
@media (max-width: 340px) {
    .masthead { gap: 8px; }
    .layout-mode-card { grid-template-columns: 72px minmax(0, 1fr); column-gap: 11px; }
    .appearance-dialog__footer { flex-direction: column; }
    .appearance-dialog__footer .button { align-self: flex-end; }
}
@media (prefers-reduced-motion: reduce) {
    .layout-mode-card { transition: none; }
}