/* Rule "Proposals" page (rule/detail_rule/detail_rule_pull_request.html).
 *
 * Proposals are shown as threads: a first proposal and the revisions made
 * from it, one card per thread, the versions in order on a timeline
 * (v1 → v2 → …), a branch indented under the version it revises.
 */

/* The page is an .h-card (css/rule/base/detail_rule_section_card.css, shared
 * by the rule sub-pages): header = title, counts, status chips, action. */
.pt-muted { color: var(--subtle-text-color); }
.pt-count-badge {
    display: inline-flex;
    align-items: center;
    font-size: .65rem;
    font-weight: 600;
    padding: .25rem .6rem;
    border-radius: 99px;
    background: rgba(13, 110, 253, .1);
    color: #0d6efd;
    border: 1px solid rgba(13, 110, 253, .2);
}
.pt-count-badge--purple {
    background: rgba(111, 66, 193, .1);
    color: #6f42c1;
    border-color: rgba(111, 66, 193, .2);
}

/* ── Thread card ─────────────────────────────────────────────────────────── */
.pt-thread {
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}
.pt-thread--accepted { border-left-color: #198754; }
.pt-thread--open     { border-left-color: #ffc107; }
.pt-thread--closed   { border-left-color: #adb5bd; }

.pt-thread__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    flex-wrap: wrap;
    padding: .75rem 1.25rem;
    background: var(--light-bg-color);
    border-bottom: 1px solid var(--border-color);
}
.pt-thread__title {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: .85rem;
    font-weight: 600;
    color: var(--text-color);
}
.pt-thread__sub {
    font-size: .75rem;
    font-weight: 400;
    color: var(--subtle-text-color);
}
.pt-thread__outcome {
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    padding: .25rem .65rem;
    border-radius: 20px;
    white-space: nowrap;
}
.pt-thread__outcome--accepted { background: #198754; color: #fff; }
.pt-thread__outcome--open     { background: #ffc107; color: #000; }
.pt-thread__outcome--closed   { background: var(--border-color); color: var(--text-color); }

/* ── Timeline of versions ────────────────────────────────────────────────── */
.pt-timeline {
    list-style: none;
    margin: 0;
    padding: .5rem 1.25rem .75rem;
}
.pt-step {
    position: relative;
    padding-left: 2.25rem;
    /* a revision that branches off an earlier version sits under it */
    margin-left: calc(var(--pt-depth, 0) * 1.5rem);
}
/* the rail joining one version to the next */
.pt-step::before {
    content: "";
    position: absolute;
    left: .7rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}
.pt-step:first-child::before { top: 1.4rem; }
.pt-step:last-child::before  { bottom: calc(100% - 1.4rem); }
.pt-step:only-child::before  { display: none; }

.pt-step__dot {
    position: absolute;
    left: .3rem;
    top: 1.05rem;
    width: .85rem;
    height: .85rem;
    border-radius: 50%;
    border: 2px solid var(--card-bg-color);
    box-shadow: 0 0 0 2px var(--border-color);
    background: #adb5bd;
}
.pt-step__dot--pending    { background: #ffc107; box-shadow: 0 0 0 2px #ffc10766; }
.pt-step__dot--accepted   { background: #198754; box-shadow: 0 0 0 2px #19875466; }
.pt-step__dot--rejected   { background: #dc3545; box-shadow: 0 0 0 2px #dc354566; }
.pt-step__dot--superseded { background: #6f42c1; box-shadow: 0 0 0 2px #6f42c166; }

.pt-step__card {
    display: block;
    margin: .45rem 0;
    padding: .7rem .9rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: inherit;
    text-decoration: none;
    transition: box-shadow .15s ease, border-color .15s ease;
}
.pt-step__card:hover {
    color: inherit;
    text-decoration: none;
    border-color: #0d6efd66;
    box-shadow: 0 3px 14px rgba(0, 0, 0, .08);
}
.pt-step--accepted .pt-step__card {
    border: 2px solid #198754;
    box-shadow: 0 3px 14px rgba(25, 135, 84, .15);
}

.pt-step__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .6rem;
    flex-wrap: wrap;
}
.pt-step__who {
    display: flex;
    align-items: center;
    gap: .5rem;
    min-width: 0;
    font-size: .85rem;
}
.pt-version {
    font-size: .72rem;
    font-weight: 700;
    padding: .1rem .45rem;
    border-radius: 6px;
    background: #0d6efd14;
    color: #0d6efd;
    border: 1px solid #0d6efd33;
    white-space: nowrap;
}
.pt-avatar {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--light-bg-color);
    font-size: .72rem;
    font-weight: 600;
    color: var(--subtle-text-color);
}
.pt-avatar img { width: 100%; height: 100%; object-fit: cover; }
.pt-step__action {
    font-size: .78rem;
    color: var(--subtle-text-color);
}

.pt-status {
    font-size: .68rem;
    font-weight: 600;
    letter-spacing: .04em;
    text-transform: uppercase;
    padding: .22rem .6rem;
    border-radius: 20px;
    white-space: nowrap;
}
.pt-status--pending    { background: #ffc107; color: #000; }
.pt-status--accepted   { background: #198754; color: #fff; }
.pt-status--rejected   { background: #dc3545; color: #fff; }
.pt-status--superseded { background: #6f42c1; color: #fff; }

.pt-step__message {
    font-size: .84rem;
    color: var(--text-color);
    margin: .45rem 0 .5rem;
    line-height: 1.5;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.pt-step__message--empty {
    color: var(--subtle-text-color);
    font-style: italic;
}

.pt-step__meta {
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
    font-size: .72rem;
    color: var(--subtle-text-color);
}
.pt-chip {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .15rem .5rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    background: var(--light-bg-color);
    font-weight: 500;
}
.pt-score { display: inline-flex; align-items: center; gap: .35rem; }
.pt-score__bar {
    width: 50px;
    height: 5px;
    border-radius: 99px;
    background: var(--border-color);
    overflow: hidden;
    display: inline-block;
}
.pt-score__fill { display: block; height: 5px; border-radius: 99px; }
.pt-comments { margin-left: auto; display: inline-flex; align-items: center; gap: .3rem; }
.pt-comments--some { color: #0d6efd; font-weight: 600; }

@media (max-width: 576px) {
    .pt-timeline { padding: .5rem .75rem .75rem; }
    .pt-thread__header { padding: .65rem .75rem; }
}

/* ── Filters: one compact bar (search, type, sort, help, expand/collapse) ── */
.pt-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .4rem;
    padding: .35rem;
    margin-bottom: .8rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--light-bg-color);
    font-size: .76rem;
}
.pt-toolbar__end { display: inline-flex; align-items: center; gap: .3rem; margin-left: auto; }

.pt-search { position: relative; flex: 1 1 12rem; max-width: 18rem; }
.pt-search i {
    position: absolute;
    left: .55rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: .68rem;
    color: var(--subtle-text-color);
}
.pt-search input,
.pt-select {
    height: 28px;
    font-size: .76rem;
    color: var(--text-color);
    background-color: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 7px;
    outline: none;
}
.pt-search input { width: 100%; padding: 0 .5rem 0 1.6rem; }
.pt-select { padding: 0 .4rem; cursor: pointer; }
.pt-search input:focus,
.pt-select:focus { border-color: #0d6efd88; box-shadow: 0 0 0 2px #0d6efd22; }

.pt-tool-btn {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    height: 28px;
    padding: 0 .55rem;
    font-size: .74rem;
    border-radius: 7px;
    border: 1px solid var(--border-color);
    background: var(--card-bg-color);
    color: var(--subtle-text-color);
    cursor: pointer;
}
.pt-tool-btn:hover:not(:disabled) { color: #0d6efd; border-color: #0d6efd66; }
.pt-tool-btn:disabled { opacity: .45; cursor: default; }

.pt-empty { color: var(--subtle-text-color); font-size: .85rem; }
.pt-list--loading { opacity: .55; transition: opacity .15s ease; }

/* ── Collapsible thread ──────────────────────────────────────────────────── */
button.pt-thread__header {
    width: 100%;
    border: 0;
    text-align: left;
    color: inherit;
    cursor: pointer;
}
button.pt-thread__header:hover { background: var(--border-color); }
.pt-thread__chevron { font-size: .7rem; color: var(--subtle-text-color); transition: transform .15s ease; }
.pt-thread__chevron--open { transform: rotate(90deg); }

/* collapsed summary: v1 → v2 → v3 and the latest justification */
.pt-chain {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .45rem;
    padding: .6rem 1.25rem;
    font-size: .78rem;
    cursor: pointer;
}
.pt-chain__step {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-weight: 600;
    color: var(--text-color);
}
.pt-chain__arrow { font-size: .7rem; color: var(--subtle-text-color); }
.pt-chain__preview {
    flex: 1 1 12rem;
    min-width: 0;
    margin-left: .5rem;
    color: var(--subtle-text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

@media (max-width: 576px) {
    .pt-search { max-width: none; flex-basis: 100%; }
}