:root {
    --qa-ink: var(--color-ink);
    --qa-muted: var(--color-muted);
    --qa-line: var(--color-line);
    --qa-paper: var(--color-surface);
    --qa-accent: var(--color-primary);
    --qa-accent-soft: var(--color-primary-soft);
    --qa-accept: var(--color-warning);
    --qa-accept-soft: rgba(255, 125, 0, 0.12);
    --qa-solved: var(--color-success);
    --qa-solved-soft: rgba(54, 207, 201, 0.12);
    --qa-warm: var(--color-primary-tint);
    --qa-shadow: var(--shadow-card);
}

.qa-page {
    min-height: calc(100vh - var(--site-header-h, 64px));
    background: var(--color-page);
    font-family: var(--font-sans);
    color: var(--qa-ink);
    padding-bottom: 64px;
}

.qa-hero {
    padding: 56px 0 28px;
    text-align: center;
}

.qa-hero-compact {
    padding: 36px 0 20px;
    text-align: left;
}

.qa-brand {
    margin: 0 0 10px;
    font-family: var(--font-sans);
    font-size: 13px;
    letter-spacing: 0.2em;
    color: var(--qa-accent);
    text-transform: uppercase;
}

.qa-brand a { color: inherit; }

.qa-hero-title {
    margin: 0 0 10px;
    font-family: var(--font-sans);
    font-size: clamp(1.7rem, 3.6vw, 2.5rem);
    font-weight: 700;
    line-height: 1.25;
}

.qa-hero-desc {
    margin: 0 0 18px;
    color: var(--qa-muted);
    font-size: 15px;
}

.qa-hero-desc a { color: var(--qa-accent); }

.qa-layout {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
}

.qa-side {
    position: sticky;
    top: 80px;
}

.qa-side-block {
    background: var(--qa-paper);
    border: 1px solid var(--qa-line);
    border-radius: var(--radius-lg);
    padding: 16px;
    box-shadow: var(--qa-shadow);
    margin-bottom: 14px;
}

.qa-side-title {
    margin: 0 0 12px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--qa-muted);
}

.qa-cat-list,
.qa-filter-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.qa-cat-list a,
.qa-filter-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 10px;
    color: var(--qa-ink);
    text-decoration: none;
    font-size: 14px;
    transition: background .15s ease;
}

.qa-cat-list a:hover,
.qa-filter-list a:hover,
.qa-cat-list a.active,
.qa-filter-list a.active {
    background: var(--qa-accent-soft);
    color: var(--qa-accent);
    text-decoration: none;
}

.qa-cat-list .count {
    color: var(--qa-muted);
    font-size: 12px;
}

.qa-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.qa-search {
    display: inline-flex;
    width: min(100%, 300px);
    background: #fff;
    border: 1px solid var(--qa-line);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--qa-shadow);
}

.qa-search input {
    flex: 1;
    border: 0;
    padding: 10px 16px;
    outline: none;
    background: transparent;
}

.qa-search button {
    border: 0;
    background: transparent;
    padding: 0 14px;
    color: var(--qa-accent);
}

.qa-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    font-size: 14px;
    text-decoration: none;
    transition: background .2s ease, color .2s ease, border-color .2s ease, transform .2s ease;
    cursor: pointer;
    background: transparent;
}

.qa-btn:hover { text-decoration: none; transform: translateY(-1px); }

.qa-btn-primary {
    background: var(--qa-accent);
    color: #fff;
}
.qa-btn-primary:hover { color: #fff; background: #007c92; }

.qa-btn-ghost {
    border-color: var(--qa-line);
    color: var(--qa-ink);
    background: var(--qa-paper);
}
.qa-btn-ghost:hover { color: var(--qa-accent); border-color: var(--qa-accent); }

.qa-btn-accept {
    background: var(--qa-accept);
    color: #fff;
}
.qa-btn-accept:hover { color: #fff; background: #a8670e; }

.qa-list {
    list-style: none;
    margin: 0;
    padding: 0;
    background: var(--qa-paper);
    border: 1px solid var(--qa-line);
    border-radius: var(--radius-lg);
    box-shadow: var(--qa-shadow);
    overflow: hidden;
}

.qa-item {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 16px;
    padding: 18px 22px;
    border-bottom: 1px solid var(--qa-line);
    animation: qaFadeUp .45s ease both;
}

.qa-item:nth-child(1) { animation-delay: .02s; }
.qa-item:nth-child(2) { animation-delay: .06s; }
.qa-item:nth-child(3) { animation-delay: .1s; }
.qa-item:nth-child(4) { animation-delay: .14s; }
.qa-item:nth-child(5) { animation-delay: .18s; }

.qa-item:last-child { border-bottom: 0; }
.qa-item.is-top {
    background: linear-gradient(90deg, rgba(195, 122, 103, 0.06), transparent 55%);
}
.qa-item.is-solved {
    background: linear-gradient(90deg, rgba(26, 122, 76, 0.05), transparent 55%);
}

@keyframes qaFadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.qa-stats {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: stretch;
}

.qa-stat {
    text-align: center;
    padding: 6px 4px;
    border-radius: 10px;
    border: 1px solid var(--qa-line);
    font-size: 12px;
    color: var(--qa-muted);
    line-height: 1.3;
}

.qa-stat strong {
    display: block;
    font-size: 16px;
    color: var(--qa-ink);
    font-weight: 700;
}

.qa-stat.answered {
    border-color: rgba(195, 122, 103, 0.35);
    background: var(--qa-accent-soft);
    color: var(--qa-accent);
}
.qa-stat.answered strong { color: var(--qa-accent); }

.qa-stat.solved {
    border-color: rgba(26, 122, 76, 0.35);
    background: var(--qa-solved-soft);
    color: var(--qa-solved);
}
.qa-stat.solved strong { color: var(--qa-solved); }

.qa-item-title {
    margin: 0 0 8px;
    font-size: 17px;
    font-weight: 700;
    line-height: 1.4;
}

.qa-item-title a {
    color: var(--qa-ink);
    text-decoration: none;
}
.qa-item-title a:hover { color: var(--qa-accent); }

.qa-flags {
    display: inline-flex;
    gap: 6px;
    margin-right: 6px;
    vertical-align: middle;
}

.qa-flag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: var(--radius-md);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.qa-flag-top { background: var(--qa-accent-soft); color: var(--qa-accent); }
.qa-flag-solved { background: var(--qa-solved-soft); color: var(--qa-solved); }
.qa-flag-reward { background: var(--qa-accept-soft); color: var(--qa-accept); }
.qa-flag-closed { background: rgba(10, 46, 54, 0.08); color: var(--qa-muted); }

.qa-item-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
    align-items: center;
    color: var(--qa-muted);
    font-size: 13px;
}

.qa-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.qa-tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 6px;
    background: rgba(10, 46, 54, 0.06);
    color: var(--qa-ink);
    font-size: 12px;
    text-decoration: none;
}
.qa-tag:hover {
    background: var(--qa-accent-soft);
    color: var(--qa-accent);
    text-decoration: none;
}

.qa-empty {
    padding: 48px 20px;
    text-align: center;
    color: var(--qa-muted);
    background: var(--qa-paper);
    border: 1px dashed var(--qa-line);
    border-radius: var(--radius-lg);
}

.qa-pager {
    margin-top: 20px;
    text-align: center;
}

.qa-panel {
    background: var(--qa-paper);
    border: 1px solid var(--qa-line);
    border-radius: var(--radius-lg);
    box-shadow: var(--qa-shadow);
    padding: 24px;
}

.qa-question-body {
    margin-bottom: 28px;
}

.qa-content {
    font-size: 15px;
    line-height: 1.75;
    color: var(--qa-ink);
    word-break: break-word;
}

.qa-content img { max-width: 100%; height: auto; }

.qa-answer-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 0 0 16px;
}

.qa-answer-head h2 {
    margin: 0;
    font-size: 18px;
    font-family: var(--font-sans);
}

.qa-sort a {
    margin-left: 10px;
    font-size: 13px;
    color: var(--qa-muted);
    text-decoration: none;
}
.qa-sort a.active,
.qa-sort a:hover { color: var(--qa-accent); }

.qa-answer {
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr);
    gap: 16px;
    padding: 22px 0;
    border-top: 1px solid var(--qa-line);
}

.qa-answer.is-accepted {
    margin: 0 -8px;
    padding: 22px 8px;
    border-radius: 14px;
    border: 1px solid rgba(196, 122, 18, 0.35);
    background: linear-gradient(180deg, rgba(196, 122, 18, 0.06), transparent 70%);
}

.qa-vote {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.qa-vote-btn {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid var(--qa-line);
    background: var(--qa-paper);
    color: var(--qa-muted);
    cursor: pointer;
    transition: all .15s ease;
}

.qa-vote-btn:hover,
.qa-vote-btn.active-up {
    color: var(--qa-accent);
    border-color: var(--qa-accent);
    background: var(--qa-accent-soft);
}

.qa-vote-btn.active-down {
    color: #b33;
    border-color: #b33;
    background: rgba(187, 51, 51, 0.08);
}

.qa-vote-score {
    font-size: 18px;
    font-weight: 700;
    color: var(--qa-ink);
    min-width: 2ch;
    text-align: center;
}

.qa-accepted-mark {
    margin-top: 8px;
    color: var(--qa-accept);
    font-size: 22px;
}

.qa-answer-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 14px;
    align-items: center;
    margin-top: 14px;
    font-size: 13px;
    color: var(--qa-muted);
}

.qa-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    object-fit: cover;
}

.qa-answer-box { margin-top: 28px; }
.qa-answer-box h3 {
    margin: 0 0 14px;
    font-size: 17px;
    font-family: var(--font-sans);
}

.qa-form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    margin-top: 14px;
}

@media (max-width: 991px) {
    .qa-layout {
        grid-template-columns: 1fr;
    }
    .qa-side {
        position: static;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
}

@media (max-width: 767px) {
    .qa-side { grid-template-columns: 1fr; }
    .qa-item {
        grid-template-columns: 72px minmax(0, 1fr);
        padding: 14px 14px;
    }
    .qa-answer {
        grid-template-columns: 44px minmax(0, 1fr);
    }
    .qa-toolbar { flex-direction: column; align-items: stretch; }
    .qa-search { width: 100%; }
}