.old-errata-archive {
    --bg-main: #f4efe6;
    --bg-panel: rgba(255, 255, 255, 0.92);
    --bg-soft: #f8f4ec;
    --text-main: #1f2937;
    --text-sub: #5b6472;
    --line-soft: rgba(31, 41, 55, 0.12);
    --shadow-soft: 0 24px 60px rgba(31, 41, 55, 0.12);
    --errata: #b45309;
    --errata-soft: #fff3e6;
    --textcor: #1d4ed8;
    --textcor-soft: #eaf2ff;
    --before-bg: #fff1f2;
    --before-line: #fda4af;
    --after-bg: #effdf4;
    --after-line: #86efac;
    --note-bg: #f8fafc;
    --note-line: #cbd5e1;
    padding: 32px 20px 48px;
    background:
        radial-gradient(circle at top left, rgba(217, 119, 6, 0.16), transparent 26%),
        radial-gradient(circle at top right, rgba(37, 99, 235, 0.18), transparent 22%),
        linear-gradient(180deg, #fbf8f2 0%, #eef4ff 100%);
    color: var(--text-main);
}

.old-errata-archive * {
    box-sizing: border-box;
}

.old-errata-archive a {
    color: inherit;
}

.old-errata-archive .legacy-shell {
    width: min(1280px, calc(100vw - 32px));
    margin: 0 auto;
}

.old-errata-archive .archive-nav {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.old-errata-archive .archive-nav a {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 999px;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.9);
    color: #31507a;
    border: 1px solid rgba(49, 80, 122, 0.16);
    font-weight: 700;
}

.old-errata-archive .archive-hero {
    background: var(--bg-panel);
    border: 1px solid rgba(180, 83, 9, 0.14);
    border-radius: 28px;
    padding: 30px;
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(10px);
}

.old-errata-archive .archive-hero h1 {
    margin: 0;
    font-size: clamp(2rem, 5vw, 3.4rem);
    line-height: 1.1;
    color: #0f172a;
}

.old-errata-archive .archive-controls {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 16px;
    margin: 24px 0 18px;
    align-items: center;
}

.old-errata-archive .search-box {
    background: var(--bg-panel);
    border-radius: 20px;
    border: 1px solid rgba(37, 99, 235, 0.16);
    padding: 12px 14px;
    box-shadow: 0 18px 40px rgba(37, 99, 235, 0.08);
}

.old-errata-archive .search-box label {
    display: block;
    font-size: 0.86rem;
    color: var(--text-sub);
    margin-bottom: 8px;
    font-weight: 700;
}

.old-errata-archive .search-box input {
    width: 100%;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--text-main);
    font-size: 1rem;
    font: inherit;
}

.old-errata-archive .control-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.old-errata-archive .control-buttons button {
    appearance: none;
    border: 0;
    cursor: pointer;
    padding: 12px 18px;
    border-radius: 999px;
    font: inherit;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, #9a3412, #c2410c);
    box-shadow: 0 14px 26px rgba(154, 52, 18, 0.2);
}

.old-errata-archive .control-buttons button.secondary {
    background: linear-gradient(135deg, #1d4ed8, #2563eb);
    box-shadow: 0 14px 26px rgba(37, 99, 235, 0.18);
}

.old-errata-archive .result-summary {
    margin: 0 0 14px;
    color: var(--text-sub);
    font-size: 0.95rem;
    min-height: 1.5em;
}

.old-errata-archive .archive-loading,
.old-errata-archive .archive-fallback,
.old-errata-archive .empty-state {
    padding: 24px;
    text-align: center;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.86);
    color: var(--text-sub);
    border: 1px dashed rgba(31, 41, 55, 0.16);
}

.old-errata-archive .archive-fallback {
    margin-bottom: 16px;
}

.old-errata-archive .archive-fallback a {
    color: #1d4ed8;
    font-weight: 700;
}

.old-errata-archive .empty-state {
    display: none;
}

.old-errata-archive .empty-state.visible {
    display: block;
}

.old-errata-archive .history-list {
    display: grid;
    gap: 16px;
}

.old-errata-archive .history-day {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(31, 41, 55, 0.09);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 18px 44px rgba(31, 41, 55, 0.08);
}

.old-errata-archive .history-day[hidden],
.old-errata-archive .history-type-card[hidden],
.old-errata-archive .history-entry[hidden] {
    display: none !important;
}

.old-errata-archive .history-day > summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 24px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(245, 240, 231, 0.96));
}

.old-errata-archive .history-day > summary::-webkit-details-marker {
    display: none;
}

.old-errata-archive .day-date {
    font-size: 1.28rem;
    font-weight: 800;
}

.old-errata-archive .day-stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

.old-errata-archive .day-stat {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 999px;
    background: #f8fafc;
    color: var(--text-sub);
    font-size: 0.88rem;
    font-weight: 700;
    border: 1px solid rgba(31, 41, 55, 0.08);
}

.old-errata-archive .day-stat-visible {
    color: #0f766e;
    background: #ecfdf5;
    border-color: rgba(16, 185, 129, 0.2);
}

.old-errata-archive .history-day-body {
    display: grid;
    gap: 18px;
    padding: 0 18px 18px;
}

.old-errata-archive .history-type-card {
    border-radius: 22px;
    border: 1px solid var(--line-soft);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.96);
}

.old-errata-archive .history-type-card.kind-errata {
    border-color: rgba(180, 83, 9, 0.18);
}

.old-errata-archive .history-type-card.kind-textcor {
    border-color: rgba(37, 99, 235, 0.18);
}

.old-errata-archive .history-type-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 18px 20px;
}

.old-errata-archive .kind-errata .history-type-header {
    background: var(--errata-soft);
}

.old-errata-archive .kind-textcor .history-type-header {
    background: var(--textcor-soft);
}

.old-errata-archive .history-type-header h3 {
    margin: 0;
    font-size: 1.18rem;
}

.old-errata-archive .history-type-count {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-sub);
}

.old-errata-archive .history-category {
    padding: 0 20px 20px;
}

.old-errata-archive .history-category h4 {
    margin: 18px 0 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(31, 41, 55, 0.08);
    font-size: 1rem;
}

.old-errata-archive .history-entry-list {
    display: grid;
    gap: 14px;
}

.old-errata-archive .history-entry {
    border-radius: 20px;
    border: 1px solid rgba(31, 41, 55, 0.08);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(249, 247, 243, 0.98));
    padding: 18px;
}

.old-errata-archive .entry-header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: flex-start;
    margin-bottom: 14px;
}

.old-errata-archive .entry-title {
    font-size: 1.08rem;
    font-weight: 800;
    line-height: 1.5;
}

.old-errata-archive .entry-kind-badge {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    padding: 7px 10px;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-sub);
    background: #f8fafc;
    border: 1px solid rgba(31, 41, 55, 0.08);
}

.old-errata-archive .entry-panels {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.old-errata-archive .entry-panels-empty {
    display: block;
    padding: 14px 16px;
    border-radius: 16px;
    background: #f8fafc;
    color: var(--text-sub);
}

.old-errata-archive .entry-panel {
    border-radius: 18px;
    padding: 16px;
    border: 1px solid transparent;
}

.old-errata-archive .entry-panel h5 {
    margin: 0 0 10px;
    font-size: 0.92rem;
}

.old-errata-archive .entry-panel-before {
    background: var(--before-bg);
    border-color: var(--before-line);
}

.old-errata-archive .entry-panel-before h5 {
    color: #be123c;
}

.old-errata-archive .entry-panel-after {
    background: var(--after-bg);
    border-color: var(--after-line);
}

.old-errata-archive .entry-panel-after h5 {
    color: #15803d;
}

.old-errata-archive .entry-body {
    line-height: 1.9;
    word-break: break-word;
}

.old-errata-archive .inline-change {
    font-weight: 800;
    padding: 0 0.08em;
    border-radius: 0.3em;
}

.old-errata-archive .inline-change-before {
    background: rgba(244, 63, 94, 0.18);
    color: #9f1239;
    box-shadow: inset 0 -0.55em 0 rgba(253, 164, 175, 0.22);
}

.old-errata-archive .inline-change-after {
    background: rgba(34, 197, 94, 0.18);
    color: #166534;
    box-shadow: inset 0 -0.55em 0 rgba(134, 239, 172, 0.22);
}

.old-errata-archive .entry-notes {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 18px;
    background: var(--note-bg);
    border-left: 4px solid var(--note-line);
}

.old-errata-archive .entry-note-label {
    font-size: 0.84rem;
    font-weight: 800;
    color: var(--text-sub);
    margin-bottom: 10px;
}

.old-errata-archive .entry-note + .entry-note {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(31, 41, 55, 0.08);
}

.old-errata-archive .entry-source {
    margin-top: 12px;
    font-size: 0.82rem;
    color: #64748b;
}

@media (max-width: 960px) {
    .old-errata-archive .entry-panels {
        grid-template-columns: 1fr;
    }

    .old-errata-archive .archive-controls {
        grid-template-columns: 1fr;
    }

    .old-errata-archive .control-buttons {
        justify-content: flex-start;
    }

    .old-errata-archive .history-day > summary,
    .old-errata-archive .entry-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .old-errata-archive {
        padding: 20px 14px 32px;
    }

    .old-errata-archive .legacy-shell {
        width: min(100vw - 20px, 1280px);
    }

    .old-errata-archive .archive-hero,
    .old-errata-archive .history-day > summary,
    .old-errata-archive .history-type-header,
    .old-errata-archive .history-category,
    .old-errata-archive .history-entry {
        padding-left: 16px;
        padding-right: 16px;
    }

    .old-errata-archive .history-day-body {
        padding-left: 12px;
        padding-right: 12px;
    }
}