/**
 * Project: PHP Gallery
 * Repository: https://github.com/klusik/PHP_gallery
 * File: public/assets/styles/breadcrumbs.css
 * Module Type: Stylesheet
 * Purpose: Present all breadcrumb presets through one accessible hierarchy.
 * Responsibilities: Preserve readable ancestors, focus states and narrow-screen wrapping.
 * Author: Rudolf Klusal
 * License: MIT License (see LICENSE file in repository)
 */

.breadcrumbs {
    min-width: 0;
    max-width: 100%;
    margin: 0 0 1rem;
    color: var(--ink);
    font-size: 0.9rem;
    line-height: 1.45;
}

.breadcrumbs__list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.25rem 0.5rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

/* Wrap whole ancestors and then long words: every destination remains reachable. */
.breadcrumbs__item {
    display: inline-flex;
    align-items: center;
    min-width: 0;
    max-width: 100%;
    gap: 0.5rem;
}

.breadcrumbs__link,
.breadcrumbs__current {
    display: block;
    min-width: 0;
    padding: 0.2rem 0;
    overflow-wrap: anywhere;
}

.breadcrumbs__link {
    color: var(--accent-dark, var(--ink));
    text-decoration: none;
    text-underline-offset: 0.18em;
}

.breadcrumbs__link:hover {
    text-decoration: underline;
}

.breadcrumbs__link:focus-visible {
    outline: 2px solid var(--ink);
    outline-offset: 3px;
    border-radius: 3px;
    text-decoration: underline;
}

.breadcrumbs__current {
    color: var(--ink);
    font-weight: 700;
}

/* Empty generated content keeps separators out of the accessibility tree. */
.breadcrumbs__item + .breadcrumbs__item::before {
    content: "";
    flex: 0 0 0.35em;
    width: 0.35em;
    height: 0.35em;
    border-top: 1px solid currentColor;
    border-right: 1px solid currentColor;
    color: var(--muted);
    transform: rotate(45deg);
}

.breadcrumbs--minimal .breadcrumbs__item + .breadcrumbs__item::before {
    flex-basis: 0;
    width: 0;
    height: 0.8em;
    border-top: 0;
    transform: none;
}

.breadcrumbs--pills .breadcrumbs__link,
.breadcrumbs--pills .breadcrumbs__current {
    padding: 0.25rem 0.65rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--panel);
}

.breadcrumbs--pills .breadcrumbs__current {
    border-color: var(--ink);
}

.breadcrumbs--surface {
    padding: 0.35rem 0.65rem;
    border: 1px solid var(--line);
    border-radius: var(--radius, 12px);
    background: var(--panel);
}

.breadcrumbs--surface .breadcrumbs__current {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 0.2em;
}

/* Ribbon segments use a separate arrow marker so every link keeps its full focus outline. */
.breadcrumbs--ribbon .breadcrumbs__list {
    gap: 0.35rem 0.45rem;
}

.breadcrumbs--ribbon .breadcrumbs__item {
    gap: 0.35rem;
    padding: 0.12rem 0.32rem 0.12rem 0.48rem;
    border: 1px solid var(--line);
    border-radius: 0.4rem;
    background: var(--panel);
    background: color-mix(in srgb, var(--accent) 9%, var(--panel));
}

.breadcrumbs--ribbon .breadcrumbs__link,
.breadcrumbs--ribbon .breadcrumbs__current {
    padding: 0.12rem 0;
}

.breadcrumbs--ribbon .breadcrumbs__item + .breadcrumbs__item::before {
    display: none;
}

.breadcrumbs--ribbon .breadcrumbs__item::after {
    content: "";
    flex: 0 0 0.42rem;
    width: 0.42rem;
    height: 0.62rem;
    background: var(--accent);
    clip-path: polygon(0 0, 100% 50%, 0 100%);
    opacity: 0.72;
    pointer-events: none;
}

/* Nodes turn the separator slot into a connected, non-verbal route marker. */
.breadcrumbs--nodes .breadcrumbs__item::before {
    content: "";
    flex: 0 0 0.42rem;
    width: 0.42rem;
    height: 0.42rem;
    border: 2px solid var(--accent);
    border-radius: 50%;
    background: var(--panel);
    pointer-events: none;
}

.breadcrumbs--nodes .breadcrumbs__item + .breadcrumbs__item::before {
    flex-basis: 0.9rem;
    width: 0.9rem;
    height: 0.5rem;
    border: 0;
    border-radius: 0;
    transform: none;
    background:
        radial-gradient(circle at 50% 50%, var(--accent) 0 0.2rem, transparent 0.22rem),
        linear-gradient(var(--line), var(--line)) center / 100% 1px no-repeat;
}

.breadcrumbs--nodes .breadcrumbs__item:first-child::before {
    box-shadow: 0 0 0 0.18rem color-mix(in srgb, var(--accent) 16%, transparent);
}

/* Tabs keep the hierarchy compact while the active destination reads as selected. */
.breadcrumbs--tabs .breadcrumbs__list {
    align-items: stretch;
    gap: 0.18rem 0.3rem;
}

.breadcrumbs--tabs .breadcrumbs__item {
    padding: 0.1rem 0.45rem;
    border: 1px solid transparent;
    border-bottom-color: var(--line);
}

.breadcrumbs--tabs .breadcrumbs__item + .breadcrumbs__item::before {
    display: none;
}

.breadcrumbs--tabs .breadcrumbs__link,
.breadcrumbs--tabs .breadcrumbs__current {
    padding: 0.16rem 0.05rem;
}

.breadcrumbs--tabs .breadcrumbs__current {
    border-bottom: 2px solid var(--accent);
    color: var(--ink);
}

/* Small raised tiles provide a card-like treatment without clipping focus rings. */
.breadcrumbs--tiles .breadcrumbs__list {
    gap: 0.35rem;
}

.breadcrumbs--tiles .breadcrumbs__item {
    padding: 0.18rem 0.48rem;
    border: 1px solid var(--line);
    border-radius: 0.45rem;
    background: var(--panel);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
    box-shadow: 0 1px 2px color-mix(in srgb, var(--ink) 12%, transparent);
}

.breadcrumbs--tiles .breadcrumbs__item + .breadcrumbs__item::before {
    display: none;
}

.breadcrumbs--tiles .breadcrumbs__link,
.breadcrumbs--tiles .breadcrumbs__current {
    padding: 0.08rem 0;
}

.breadcrumbs--tiles .breadcrumbs__current {
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 0.2em;
}

/* The gradient preset keeps foreground contrast tied to Theme ink and panel colors. */
.breadcrumbs--gradient {
    overflow: visible;
    padding: 0 0.1rem 0.45rem;
    border: 1px solid var(--line);
    border-radius: var(--radius, 12px);
    background: var(--panel);
    background: linear-gradient(
        110deg,
        color-mix(in srgb, var(--accent) 12%, var(--panel)),
        var(--panel) 72%
    );
    color: var(--ink);
}

.breadcrumbs--gradient::before {
    display: block;
    height: 0.22rem;
    margin: 0 -0.1rem 0.3rem;
    border-radius: var(--radius, 12px) var(--radius, 12px) 0 0;
    background: var(--accent);
    background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 24%, var(--panel)));
    content: "";
    pointer-events: none;
}

.breadcrumbs--gradient .breadcrumbs__link,
.breadcrumbs--gradient .breadcrumbs__current {
    color: var(--ink);
}

.breadcrumbs--gradient .breadcrumbs__current {
    font-weight: 700;
    text-decoration: underline;
    text-decoration-color: var(--accent);
    text-decoration-thickness: 2px;
    text-underline-offset: 0.2em;
}

.breadcrumbs--gradient .breadcrumbs__item + .breadcrumbs__item::before {
    color: var(--accent);
}

/* Native radio cards keep style choice usable without a script or nested controls. */
.breadcrumb-style-picker {
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
}

.breadcrumb-style-picker__label {
    margin: 0 0 0.55rem;
    color: var(--ink);
    font-weight: 700;
}

.breadcrumb-style-picker__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
    gap: 0.65rem;
    min-width: 0;
}

.breadcrumb-style-picker__option {
    position: relative;
    display: block;
    min-width: 0;
    cursor: pointer;
}

.breadcrumb-style-picker__input,
.admin-page .breadcrumb-style-picker__input {
    position: absolute;
    width: 1px;
    height: 1px;
    min-height: 0;
    padding: 0;
    margin: -1px;
    border: 0;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
}

.breadcrumb-style-picker__card {
    position: relative;
    display: block;
    min-width: 0;
    height: 100%;
    padding: 0.7rem;
    border: 2px solid var(--line);
    border-radius: var(--radius, 12px);
    background: var(--panel);
    color: var(--ink);
    overflow-wrap: anywhere;
}

.breadcrumb-style-picker__name {
    display: block;
    margin-bottom: 0.35rem;
    padding-inline-end: 1.2rem;
    font-weight: 700;
    overflow-wrap: anywhere;
}

.breadcrumb-style-picker__preview {
    display: block;
    min-width: 0;
    padding: 0.35rem;
    border-radius: 0.45rem;
    background: var(--panel);
    background: color-mix(in srgb, var(--panel) 74%, var(--line));
}

.breadcrumb-style-picker__preview .breadcrumbs {
    display: block;
    min-width: 0;
    margin: 0;
    font-size: 0.78rem;
    font-weight: 400;
}

.breadcrumb-style-picker__input:checked + .breadcrumb-style-picker__card {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 24%, transparent);
}

.breadcrumb-style-picker__input:checked + .breadcrumb-style-picker__card::after {
    position: absolute;
    top: 0.9rem;
    right: 0.9rem;
    width: 0.7rem;
    height: 0.7rem;
    border: 2px solid var(--accent);
    border-radius: 50%;
    background: var(--accent);
    box-shadow: inset 0 0 0 2px var(--panel);
    content: "";
    pointer-events: none;
}

.breadcrumb-style-picker__input:focus-visible + .breadcrumb-style-picker__card {
    outline: 3px solid var(--ink);
    outline-offset: 3px;
}

.breadcrumb-style-picker__option:hover .breadcrumb-style-picker__card {
    border-color: var(--accent);
}

#admin-theme-breadcrumb-style,
.admin-display-option-breadcrumbs {
    grid-column: 1 / -1;
}

@media (max-width: 460px) {
    .breadcrumb-style-picker__grid {
        grid-template-columns: minmax(0, 1fr);
    }
}