/* Interface icon styling; no selectors transform imported question content. */
:root {
    --ui-icon-accent: #147d85;
    --ui-icon-soft: #e8f5f4;
    --ui-icon-outline: #cfe5e5;
}

.dark-mode {
    --ui-icon-accent: #83d9d1;
    --ui-icon-soft: #183c43;
    --ui-icon-outline: #2e5960;
}

.ui-icon {
    display: inline-block;
    width: 1.15em;
    height: 1.15em;
    flex: 0 0 auto;
    vertical-align: -.2em;
    overflow: visible;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
    pointer-events: none;
}

.ui-icon *,
.ui-icon use {
    pointer-events: none;
}

.ui-icon.ui-icon-filled {
    fill: currentColor;
    stroke: currentColor;
}

.btn > .ui-icon {
    margin-inline-end: .35em;
    vertical-align: -.22em;
}

.btn > .ui-icon:last-child:first-child,
.btn-icon > .ui-icon {
    margin-inline: 0;
}

.btn.btn-block {
    justify-content: center;
    text-align: center;
}

.btn-icon.is-selected,
.btn-icon[aria-pressed="true"],
.bookmark-btn[aria-pressed="true"] {
    color: var(--ui-icon-accent);
    background: var(--ui-icon-soft);
    border-color: var(--ui-icon-outline);
}

.search-field {
    position: relative;
    color: var(--text-muted, #5e7083);
}

.search-field > .ui-icon {
    position: absolute;
    inset-inline-start: 14px;
    top: 23px;
    width: 20px;
    height: 20px;
    transform: translateY(-50%);
}

.search-field > input {
    padding-inline-start: 44px;
}

.card-header > .ui-icon {
    width: 1.08em;
    height: 1.08em;
    padding: .38em;
    box-sizing: content-box;
    border-radius: .65em;
    color: var(--ui-icon-accent);
    background: var(--ui-icon-soft);
}

.header-actions .btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    min-width: 44px;
    height: 44px;
    min-height: 44px;
    padding: 0;
    border: 1px solid var(--border, #dce5ef);
    border-radius: 14px;
    background: var(--panel, #fff);
    color: var(--text2, #4e6277);
    box-shadow: 0 2px 6px rgba(16, 45, 73, .035);
    transition: color .16s ease, background-color .16s ease, border-color .16s ease;
}

.header-actions .btn-icon > .ui-icon {
    width: 21px;
    height: 21px;
}

.header-actions .btn-icon:hover {
    color: var(--ui-icon-accent);
    background: var(--ui-icon-soft);
    border-color: var(--ui-icon-outline);
    transform: none;
}

.header-actions .btn-icon:focus-visible {
    outline: 2px solid var(--ui-icon-accent);
    outline-offset: 3px;
}

.nav-item > .ui-icon {
    width: 22px;
    height: 22px;
    transition: color .16s ease, opacity .16s ease;
}

.nav-item.active {
    color: var(--ui-icon-accent);
    background: var(--ui-icon-soft);
}

.nav-item.active > .ui-icon {
    opacity: 1;
}

.ui-result-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--ui-icon-accent);
    font-size: 3.75rem;
    line-height: 1;
}

.ui-result-icon > .ui-icon,
.ui-icon.ui-icon-hero {
    width: 1em;
    height: 1em;
    vertical-align: 0;
}

@media (max-width: 480px) {
    .brand-block { flex-basis: 170px; }
    .brand-name { white-space: nowrap; }
    .header-actions { margin-inline-start: auto; }
}

@media (prefers-reduced-motion: reduce) {
    .header-actions .btn-icon,
    .nav-item > .ui-icon {
        transition: none;
    }
}