/* AeroCore Hotboard v1.1.0 */
.aerocore-hotboard {
    overflow: hidden;
    color: var(--text-primary, #1e293b);
    background: var(--bg-card, #fff);
    border: 1px solid var(--border-primary, #e5e7eb);
    border-radius: var(--border-radius, 8px);
    box-shadow: var(--shadow-sm, 0 1px 2px rgba(15, 23, 42, 0.04));
}

.aerocore-hotboard__header,
.aerocore-hotboard__heading,
.aerocore-hotboard__actions {
    display: flex;
    align-items: center;
}

.aerocore-hotboard__header {
    justify-content: space-between;
    min-height: 56px;
    padding: 0 18px;
    border-bottom: 1px solid var(--border-secondary, #f1f5f9);
}

.aerocore-hotboard__heading {
    min-width: 0;
    gap: 10px;
}

.aerocore-hotboard__actions {
    flex: 0 0 auto;
    margin-left: 12px;
    gap: 10px;
}

.aerocore-hotboard__mark {
    width: 4px;
    height: 18px;
    flex: 0 0 auto;
    background: var(--theme-color, #2563eb);
    border-radius: 99px;
}

.aerocore-hotboard__title {
    margin: 0;
    overflow: hidden;
    color: var(--caption-color, #1e293b);
    font-size: 17px;
    font-weight: 650;
    line-height: 1.4;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.aerocore-hotboard__updated {
    color: var(--text-muted, #94a3b8);
    font-size: 12px;
    white-space: nowrap;
}

.aerocore-hotboard__refresh,
.aerocore-hotboard__retry,
.aerocore-hotboard__tab {
    appearance: none;
    font: inherit;
    cursor: pointer;
}

.aerocore-hotboard__refresh {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    padding: 4px 9px;
    gap: 4px;
    color: var(--text-secondary, #475569);
    font-size: 12px;
    background: var(--bg-secondary, #f8fafc);
    border: 1px solid var(--border-primary, #e5e7eb);
    border-radius: var(--border-radius-sm, 6px);
}

.aerocore-hotboard__refresh:hover {
    color: var(--theme-color, #2563eb);
    border-color: var(--border-hover, #cbd5e1);
}

.aerocore-hotboard__refresh:disabled {
    cursor: wait;
    opacity: 0.62;
}

.aerocore-hotboard__refresh.is-loading .aerocore-hotboard__refresh-icon {
    animation: aerocore-hotboard-spin 0.8s linear infinite;
}

.aerocore-hotboard__tabs-wrap {
    overflow: hidden;
}

.aerocore-hotboard__tabs {
    display: flex;
    overflow-x: auto;
    padding: 12px 18px 4px;
    gap: 6px;
    scrollbar-width: none;
}

.aerocore-hotboard__tabs::-webkit-scrollbar {
    display: none;
}

.aerocore-hotboard__tab {
    min-width: 58px;
    min-height: 32px;
    flex: 0 0 auto;
    padding: 5px 14px;
    color: var(--text-secondary, #475569);
    font-size: 13px;
    line-height: 20px;
    background: transparent;
    border: 0;
    border-radius: 999px;
    transition: color 0.18s ease, background-color 0.18s ease;
}

.aerocore-hotboard__tab:hover {
    color: var(--text-primary, #1e293b);
    background: var(--bg-hover, #f1f5f9);
}

.aerocore-hotboard__tab.is-active {
    color: #fff;
    background: var(--theme-color, #2563eb);
}

.aerocore-hotboard__tab:focus-visible,
.aerocore-hotboard__retry:focus-visible,
.aerocore-hotboard__refresh:focus-visible,
.aerocore-hotboard__link:focus-visible,
.aerocore-hotboard__earthquake:focus-visible {
    outline: 2px solid var(--theme-color, #2563eb);
    outline-offset: 2px;
}

.aerocore-hotboard__panel {
    min-height: 380px;
    padding: 8px 10px 12px;
}

.aerocore-hotboard__list {
    padding: 0;
    margin: 0;
    list-style: none;
}

.aerocore-hotboard__item + .aerocore-hotboard__item {
    border-top: 1px solid var(--border-secondary, #f1f5f9);
}

.aerocore-hotboard__link {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr) auto;
    align-items: center;
    min-height: 42px;
    padding: 6px 8px;
    color: var(--text-primary, #1e293b);
    text-decoration: none;
    border-radius: var(--border-radius-sm, 6px);
    transition: background-color 0.18s ease, color 0.18s ease;
}

.aerocore-hotboard__link:hover,
.aerocore-hotboard__earthquake:hover {
    color: var(--color-link-hover, var(--theme-color, #2563eb));
    background: var(--bg-hover, #f1f5f9);
}

.aerocore-hotboard__rank {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    color: var(--text-tertiary, #64748b);
    font-size: 13px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    border-radius: 6px;
}

.aerocore-hotboard__rank.is-top-1 { color: #fff; background: #ef4444; }
.aerocore-hotboard__rank.is-top-2 { color: #fff; background: #f97316; }
.aerocore-hotboard__rank.is-top-3 { color: #fff; background: #eab308; }

.aerocore-hotboard__item-title {
    overflow: hidden;
    font-size: 14px;
    line-height: 1.5;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.aerocore-hotboard__hot {
    margin-left: 12px;
    color: var(--text-muted, #94a3b8);
    font-size: 12px;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.aerocore-hotboard__earthquake {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);
    align-items: center;
    min-height: 56px;
    padding: 7px 8px;
    gap: 10px;
    color: var(--text-primary, #1e293b);
    text-decoration: none;
    border-radius: var(--border-radius-sm, 6px);
    transition: background-color 0.18s ease, color 0.18s ease;
}

.aerocore-hotboard__magnitude {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 58px;
    min-height: 30px;
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    border-radius: 7px;
}

.aerocore-hotboard__magnitude.is-normal { background: #64748b; }
.aerocore-hotboard__magnitude.is-strong { background: #f97316; }
.aerocore-hotboard__magnitude.is-severe { background: #dc2626; }

.aerocore-hotboard__earthquake-content {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    gap: 2px;
}

.aerocore-hotboard__earthquake-location {
    overflow: hidden;
    font-size: 14px;
    line-height: 1.45;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.aerocore-hotboard__earthquake-meta {
    color: var(--text-tertiary, #64748b);
    font-size: 12px;
}

.aerocore-hotboard__major {
    position: absolute;
    top: 0;
    right: 0;
    padding: 1px 5px;
    color: #dc2626;
    font-size: 11px;
    background: var(--color-danger-bg, #fef2f2);
    border-radius: 4px;
}

.aerocore-hotboard__history {
    display: grid;
    grid-template-columns: 70px minmax(0, 1fr);
    align-items: center;
    min-height: 44px;
    padding: 6px 8px;
    gap: 10px;
}

.aerocore-hotboard__year {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 26px;
    color: var(--theme-color, #2563eb);
    font-size: 12px;
    font-weight: 650;
    background: var(--bg-secondary, #f8fafc);
    border: 1px solid var(--border-primary, #e5e7eb);
    border-radius: 6px;
}

.aerocore-hotboard__history-title {
    overflow: hidden;
    color: var(--text-primary, #1e293b);
    font-size: 14px;
    line-height: 1.5;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.aerocore-hotboard__skeleton {
    padding: 1px 8px;
}

.aerocore-hotboard__skeleton-row {
    position: relative;
    display: block;
    height: 42px;
    overflow: hidden;
    border-bottom: 1px solid var(--border-secondary, #f1f5f9);
}

.aerocore-hotboard__skeleton-row::before,
.aerocore-hotboard__skeleton-row::after {
    position: absolute;
    top: 50%;
    display: block;
    height: 10px;
    content: "";
    background: var(--bg-hover, #f1f5f9);
    border-radius: 999px;
    transform: translateY(-50%);
}

.aerocore-hotboard__skeleton-row::before { left: 4px; width: 22px; }
.aerocore-hotboard__skeleton-row::after {
    left: 42px;
    width: min(66%, 320px);
    animation: aerocore-hotboard-pulse 1.25s ease-in-out infinite alternate;
}

.aerocore-hotboard__message,
.aerocore-hotboard__noscript {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 280px;
    margin: 0;
    color: var(--text-tertiary, #64748b);
    font-size: 14px;
    text-align: center;
}

.aerocore-hotboard__retry {
    min-height: 34px;
    padding: 6px 16px;
    margin-top: 14px;
    color: #fff;
    font-size: 13px;
    background: var(--theme-color, #2563eb);
    border: 0;
    border-radius: var(--border-radius-sm, 6px);
}

.aerocore-hotboard [hidden] { display: none !important; }

@keyframes aerocore-hotboard-pulse { from { opacity: 0.45; } to { opacity: 1; } }
@keyframes aerocore-hotboard-spin { to { transform: rotate(360deg); } }

@media (max-width: 640px) {
    .aerocore-hotboard__header { min-height: 52px; padding: 0 14px; }
    .aerocore-hotboard__actions { margin-left: 8px; gap: 6px; }
    .aerocore-hotboard__updated { display: none; }
    .aerocore-hotboard__refresh-text { display: none; }
    .aerocore-hotboard__refresh { min-width: 32px; justify-content: center; padding: 4px 7px; }
    .aerocore-hotboard__tabs { padding-right: 14px; padding-left: 14px; }
    .aerocore-hotboard__tab { min-width: 62px; }
    .aerocore-hotboard__panel { min-height: 360px; padding-right: 6px; padding-left: 6px; }
    .aerocore-hotboard__hot { max-width: 64px; margin-left: 8px; }
    .aerocore-hotboard__earthquake { grid-template-columns: 58px minmax(0, 1fr); gap: 8px; }
    .aerocore-hotboard__magnitude { min-width: 54px; }
    .aerocore-hotboard__history { grid-template-columns: 64px minmax(0, 1fr); gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
    .aerocore-hotboard__tab,
    .aerocore-hotboard__link,
    .aerocore-hotboard__earthquake { transition: none; }
    .aerocore-hotboard__skeleton-row::after,
    .aerocore-hotboard__refresh.is-loading .aerocore-hotboard__refresh-icon { animation: none; }
}