.portal-panel {
    position: fixed;
    z-index: 20;
    top: max(78px, calc(env(safe-area-inset-top) + 64px));
    right: max(28px, env(safe-area-inset-right));
    bottom: max(34px, env(safe-area-inset-bottom));
    width: clamp(370px, 42vw, 610px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.48);
    border-radius: 6px;
    background: var(--paper-soft);
    color: var(--ink);
    box-shadow:
        0 28px 90px rgba(0,0,0,0.43),
        0 2px 0 rgba(255,255,255,0.55) inset;
    backdrop-filter: blur(24px) saturate(0.82);
    opacity: 0;
    transform: translateX(34px) scale(0.985);
    transform-origin: right center;
    visibility: hidden;
    pointer-events: none;
    transition:
        opacity 420ms ease,
        transform 620ms cubic-bezier(0.16,0.8,0.18,1),
        visibility 420ms ease;
}

.portal-panel.is-left {
    right: auto;
    left: max(28px, env(safe-area-inset-left));
    transform-origin: left center;
}

body.panel-open .portal-panel {
    opacity: 1;
    transform: translateX(0) scale(1);
    visibility: visible;
}

body.cursor-free.panel-open .portal-panel,
body.touch-mode.panel-open .portal-panel {
    pointer-events: auto;
}

.portal-panel-header {
    position: relative;
    flex: 0 0 auto;
    padding: 24px 72px 19px 28px;
    border-bottom: 1px solid var(--rule);
}

.portal-panel-kicker {
    color: var(--ink-faint);
    font-family: var(--mono);
    font-size: 0.58rem;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.portal-panel-title {
    margin: 2px 0 0;
    font-family: var(--editorial);
    font-size: clamp(1.65rem, 3.2vw, 2.25rem);
    font-weight: 500;
    letter-spacing: -0.015em;
    line-height: 1.08;
}

body.lang-zh-CN .portal-panel-title,
body.lang-zh-TW .portal-panel-title {
    font-family: var(--kai);
    letter-spacing: 0.04em;
}

.portal-panel-names {
    margin-top: 5px;
    color: var(--ink-faint);
    font-family: var(--ui);
    font-size: 0.62rem;
    letter-spacing: 0.08em;
}

.portal-panel-hint {
    margin-top: 12px;
    color: var(--ink-soft);
    font-family: var(--ui);
    font-size: 0.68rem;
}

.portal-close {
    position: absolute;
    top: 21px;
    right: 22px;
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    padding: 0;
    border: 1px solid rgba(32,34,37,0.14);
    border-radius: 50%;
    background: transparent;
    color: var(--ink-soft);
    cursor: pointer;
    transition: color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.portal-close::before {
    content: '✦';
    font-family: var(--editorial);
    font-size: 1rem;
}

.portal-close:hover {
    color: var(--ink);
    border-color: rgba(32,34,37,0.35);
    transform: rotate(22deg);
}

.portal-close:focus-visible {
    outline: 2px solid var(--ink);
    outline-offset: 3px;
}

.portal-panel-body {
    min-height: 0;
    flex: 1 1 auto;
    overflow: auto;
    overflow-anchor: none;
    padding: 25px 28px 36px;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: rgba(36,38,42,0.24) transparent;
}

.portal-panel-body::-webkit-scrollbar {
    width: 5px;
}

.portal-panel-body::-webkit-scrollbar-thumb {
    background: rgba(36,38,42,0.23);
    border-radius: 99px;
}

.celestial-panel {
    position: fixed;
    z-index: 21;
    top: max(78px, calc(env(safe-area-inset-top) + 64px));
    right: max(28px, env(safe-area-inset-right));
    bottom: max(34px, env(safe-area-inset-bottom));
    width: clamp(350px, 38vw, 540px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.42);
    border-radius: 8px;
    background: var(--paper-soft);
    background:
        radial-gradient(circle at 88% 8%, color-mix(in srgb, var(--body-color, #d8e5ff) 13%, transparent), transparent 38%),
        var(--paper-soft);
    color: var(--ink);
    box-shadow:
        0 28px 90px rgba(0,0,0,0.43),
        0 2px 0 rgba(255,255,255,0.5) inset;
    backdrop-filter: blur(24px) saturate(0.86);
    opacity: 0;
    visibility: hidden;
    transform: translateX(34px) scale(0.985);
    transform-origin: right center;
    pointer-events: none;
    transition:
        opacity 420ms ease,
        transform 620ms cubic-bezier(0.16,0.8,0.18,1),
        visibility 420ms ease;
}

.celestial-panel.is-left {
    right: auto;
    left: max(28px, env(safe-area-inset-left));
    transform-origin: left center;
}

body.celestial-open .celestial-panel {
    opacity: 1;
    visibility: visible;
    transform: translateX(0) scale(1);
}

body.cursor-free.celestial-open .celestial-panel,
body.touch-mode.celestial-open .celestial-panel {
    pointer-events: auto;
}

.celestial-panel-header {
    position: relative;
    padding: 24px 72px 20px 28px;
    border-bottom: 1px solid var(--rule);
}

.celestial-panel-kicker,
.celestial-panel-subtitle {
    color: var(--ink-soft);
    font-family: var(--mono);
    font-size: 0.58rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.celestial-panel-title {
    margin: 3px 0 0;
    font-family: var(--editorial);
    font-size: clamp(1.8rem, 3.4vw, 2.5rem);
    font-weight: 500;
    line-height: 1.05;
}

body.lang-zh-CN .celestial-panel-title,
body.lang-zh-TW .celestial-panel-title {
    font-family: var(--kai);
    letter-spacing: 0.04em;
}

.celestial-panel-subtitle {
    margin-top: 7px;
    letter-spacing: 0.07em;
    text-transform: none;
}

.celestial-panel-body {
    min-height: 0;
    flex: 1 1 auto;
    overflow: auto;
    padding: 27px 28px 34px;
    overscroll-behavior: contain;
    scrollbar-width: thin;
    scrollbar-color: rgba(36,38,42,0.24) transparent;
}

.celestial-observation-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 20px;
    padding: 6px 9px;
    border: 1px solid color-mix(in srgb, var(--body-color, #8899bb) 30%, transparent);
    border-radius: 3px;
    color: var(--ink-soft);
    font-family: var(--mono);
    font-size: 0.56rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.celestial-observation-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border: 1px solid var(--body-color, #8899bb);
    border-radius: 50%;
    box-shadow: 0 0 8px color-mix(in srgb, var(--body-color, #8899bb) 44%, transparent);
}

.celestial-description {
    margin: 0;
    color: var(--ink-soft);
    font-size: 0.9rem;
    line-height: 1.78;
}

.celestial-metrics {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    margin: 22px 0 0;
    overflow: hidden;
    border: 1px solid var(--rule);
    border-radius: 5px;
    background: var(--rule);
}

.celestial-metric {
    min-width: 0;
    padding: 12px 13px;
    background: rgba(250,248,242,0.78);
}

.celestial-metric dt {
    color: var(--ink-soft);
    font-family: var(--mono);
    font-size: 0.51rem;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.celestial-metric dd {
    margin: 4px 0 0;
    font-family: var(--editorial);
    font-size: 1rem;
    font-variant-numeric: tabular-nums;
}

.celestial-facts {
    display: grid;
    gap: 9px;
    margin: 22px 0 0;
    padding: 0;
    list-style: none;
}

.celestial-facts li {
    position: relative;
    padding: 10px 12px 10px 27px;
    border-left: 1px solid color-mix(in srgb, var(--body-color, #8799bb) 45%, transparent);
    background: rgba(255,255,255,0.24);
    color: var(--ink-soft);
    font-size: 0.78rem;
    line-height: 1.58;
}

.celestial-facts li::before {
    content: '✦';
    position: absolute;
    left: 10px;
    color: color-mix(in srgb, var(--body-color, #8799bb) 72%, #202225);
    font-size: 0.62rem;
}

.celestial-observer-note {
    margin-top: 22px;
    padding-top: 15px;
    border-top: 1px solid var(--rule);
    color: var(--ink-soft);
    font-family: var(--mono);
    font-size: 0.55rem;
    line-height: 1.65;
    letter-spacing: 0.04em;
}

.star-reader {
    display: flex;
    flex-direction: column;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--rule);
    color: var(--ink-faint);
}

.star-reader-kicker {
    color: var(--ink-faint);
    font-family: var(--mono);
    font-size: 0.52rem;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.star-reader-title {
    margin: 4px 0 0;
    color: var(--ink-faint);
    font-family: var(--ui);
    font-size: 0.72rem;
    font-weight: 500;
    line-height: 1.35;
}

body.lang-zh-CN .star-reader-title,
body.lang-zh-TW .star-reader-title {
    font-family: var(--kai);
    letter-spacing: 0.025em;
}

.star-reader-meta {
    margin-top: 3px;
    color: var(--ink-faint);
    font-family: var(--mono);
    font-size: 0.54rem;
    letter-spacing: 0.035em;
}

.star-reader-description {
    margin: 7px 0 0;
    color: var(--ink-faint);
    font-size: 0.68rem;
    line-height: 1.62;
}

.star-reader-description:empty,
.star-reader-status:empty {
    display: none;
}

.star-reader-status {
    margin: 7px 0 0;
    color: var(--ink-faint);
    font-size: 0.68rem;
    line-height: 1.55;
}

.star-reader.is-overview .star-reader-kicker {
    display: none;
}

.star-reader.is-overview,
.star-reader.is-empty {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
}

.star-reader.is-overview .star-reader-status,
.star-reader.is-empty .star-reader-status {
    order: -2;
    margin: 0 0 14px;
    padding-left: 12px;
    border-left: 2px solid rgba(91,88,78,0.2);
    color: var(--ink-soft);
    font-size: 0.76rem;
}

.star-reader.is-star-footnote .star-reader-kicker {
    display: none;
}

.star-reader.is-star-footnote:not(.is-empty) .star-reader-status {
    display: none;
}

.star-reader.is-empty .star-reader-status {
    color: var(--ink);
    font-size: 0.8rem;
}