.utoc {
--utoc-accent: #1d3557;
--utoc-bg: #ffffff;
--utoc-fg: #1f2933;
--utoc-muted: #6b7280;
--utoc-border: rgba(29, 53, 87, 0.14);
--utoc-hover: rgba(29, 53, 87, 0.06);
--utoc-radius: 10px;
--utoc-gap: 0.45em;
--utoc-offset: 80px;
box-sizing: border-box;
margin: 2em 0;
padding: 1.25em 1.5em;
background: var(--utoc-bg);
color: var(--utoc-fg);
border-radius: var(--utoc-radius);
font-size: 0.95em;
line-height: 1.5;
}
.utoc *,
.utoc *::before,
.utoc *::after {
box-sizing: inherit;
}
.utoc--width-auto {
display: inline-block;
min-width: min(100%, 320px);
max-width: 100%;
} .utoc__header {
display: flex;
align-items: baseline;
justify-content: space-between;
gap: 1em;
margin-bottom: 0.75em;
}
.utoc__title {
margin: 0;
padding: 0;
font-size: 1.05em;
line-height: 1.3;
font-weight: 700;
letter-spacing: 0.01em;
color: var(--utoc-fg);
border: 0;
}
.utoc__title::before,
.utoc__title::after {
content: none;
}
.utoc__anchor {
display: block;
position: relative;
top: calc(var(--utoc-offset) * -1);
height: 0;
visibility: hidden;
}
.utoc__toggle {
flex: 0 0 auto;
display: inline-flex;
align-items: center;
gap: 0.4em;
margin: 0;
padding: 0.2em 0.5em;
background: none;
border: 0;
border-radius: 6px;
color: var(--utoc-muted);
font: inherit;
font-size: 0.85em;
cursor: pointer;
}
.utoc__toggle:hover {
color: var(--utoc-accent);
background: var(--utoc-hover);
}
.utoc__toggle:focus-visible,
.utoc__link:focus-visible {
outline: 2px solid var(--utoc-accent);
outline-offset: 2px;
}
.utoc__toggle-icon {
width: 0.55em;
height: 0.55em;
border-right: 2px solid currentColor;
border-bottom: 2px solid currentColor;
transform: rotate(45deg) translate(-0.1em, -0.1em);
transition: transform 0.2s ease;
}
.utoc.is-collapsed .utoc__toggle-icon {
transform: rotate(-135deg) translate(-0.1em, -0.1em);
} .utoc__list {
margin: 0;
padding: 0;
list-style: none;
counter-reset: none;
}
.utoc__list--sub {
margin: 0.15em 0 0.35em 0;
padding-left: 1.15em;
border-left: 1px solid var(--utoc-border);
}
.utoc--flat .utoc__list--sub {
padding-left: 0;
border-left: 0;
}
.utoc__item {
margin: 0;
padding: 0;
list-style: none;
}
.utoc__item::before,
.utoc__item::marker {
content: none;
}
.utoc__link {
display: flex;
align-items: baseline;
gap: var(--utoc-gap);
padding: 0.28em 0.45em;
margin-left: -0.45em;
border-radius: 6px;
color: inherit;
text-decoration: none;
transition: background-color 0.15s ease, color 0.15s ease;
}
.utoc__link:hover {
color: var(--utoc-accent);
background: var(--utoc-hover);
text-decoration: none;
}
.utoc__number {
flex: 0 0 auto;
color: var(--utoc-accent);
font-weight: 600;
font-variant-numeric: tabular-nums;
font-size: 0.92em;
opacity: 0.85;
}
.utoc__text {
flex: 1 1 auto;
min-width: 0;
}
.utoc__link:hover .utoc__text {
text-decoration: underline;
text-underline-offset: 0.18em;
} .utoc__item.is-active > .utoc__link {
color: var(--utoc-accent);
background: var(--utoc-hover);
font-weight: 600;
}
.utoc__item.is-active > .utoc__link .utoc__number {
opacity: 1;
} .utoc--nested .utoc__item--depth-1 > .utoc__link {
font-weight: 600;
}
.utoc--nested .utoc__item--depth-2 > .utoc__link,
.utoc--nested .utoc__item--depth-3 > .utoc__link {
font-size: 0.95em;
color: var(--utoc-muted);
}
.utoc--nested .utoc__item--depth-2 > .utoc__link:hover,
.utoc--nested .utoc__item--depth-3 > .utoc__link:hover,
.utoc--nested .utoc__item--depth-2.is-active > .utoc__link,
.utoc--nested .utoc__item--depth-3.is-active > .utoc__link {
color: var(--utoc-accent);
} .utoc.is-collapsed .utoc__list--root {
display: none;
} .utoc--sticky {
position: sticky;
top: calc(var(--utoc-offset) + 16px);
max-height: calc(100vh - var(--utoc-offset) - 48px);
overflow-y: auto;
overscroll-behavior: contain;
} .utoc--theme-card {
border: 1px solid var(--utoc-border);
box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}
.utoc--theme-bordered {
padding-left: 1.15em;
border-left: 3px solid var(--utoc-accent);
border-radius: 0;
background: transparent;
}
.utoc--theme-minimal {
padding: 0;
background: transparent;
border: 0;
}
.utoc--theme-minimal .utoc__header {
padding-bottom: 0.5em;
border-bottom: 1px solid var(--utoc-border);
}
.utoc--theme-dark {
--utoc-bg: #12161f;
--utoc-fg: #e8eaf0;
--utoc-muted: #9aa3b2;
--utoc-border: rgba(255, 255, 255, 0.12);
--utoc-hover: rgba(255, 255, 255, 0.07);
border: 1px solid var(--utoc-border);
}
.utoc--theme-dark .utoc__number,
.utoc--theme-dark .utoc__link:hover,
.utoc--theme-dark .utoc__item.is-active > .utoc__link {
color: #ffffff;
}
.utoc--theme-dark .utoc__item.is-active > .utoc__link {
background: rgba(255, 255, 255, 0.1);
} .utoc-back {
margin: 0.35em 0 1.2em;
font-size: 0.82em;
line-height: 1.4;
}
.utoc-back__link {
color: var(--utoc-accent, #1d3557);
text-decoration: none;
opacity: 0.7;
}
.utoc-back__link:hover {
opacity: 1;
text-decoration: underline;
} @media (max-width: 600px) {
.utoc {
padding: 1em 1.1em;
font-size: 0.92em;
}
.utoc--sticky {
position: static;
max-height: none;
}
.utoc__list--sub {
padding-left: 0.85em;
}
}
@media (prefers-reduced-motion: reduce) {
.utoc *,
.utoc *::before,
.utoc *::after {
transition: none !important;
}
}
@media print {
.utoc__toggle,
.utoc-back {
display: none;
}
.utoc {
border: 1px solid #ccc;
box-shadow: none;
}
}