/* Shared symbol card: the full dictionary and the compact assistant use this component. */
.physics-symbol-card {
    --psc-brand: var(--brand-primary, #657954);
    --psc-brand-dark: var(--brand-dark, #4a5a3d);
    --psc-brand-soft: var(--brand-light, #e8ede3);
    --psc-text: var(--text-main, #1d1d1f);
    --psc-muted: var(--text-muted, #6b7280);
    --psc-border: var(--border-color, #dde3d9);
    box-sizing: border-box;
    color: var(--psc-text);
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro TC", "PingFang TC",
        "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}

.physics-symbol-card *,
.physics-symbol-card *::before,
.physics-symbol-card *::after {
    box-sizing: border-box;
}

.physics-symbol-card__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

.physics-symbol-card__identity {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 14px;
}

.physics-symbol-card__glyph {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 58px;
    min-width: 58px;
    height: 58px;
    border: 1px solid color-mix(in srgb, var(--psc-brand) 22%, transparent);
    border-radius: 16px;
    background: color-mix(in srgb, var(--psc-brand-soft) 75%, white);
    color: var(--psc-brand-dark);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.85rem;
    font-weight: 600;
    line-height: 1;
}

.physics-symbol-card__glyph sub,
.physics-symbol-card__glyph sup {
    font-size: 0.55em;
}

.physics-symbol-card__glyph sub,
.physics-symbol-card__description sub,
.physics-symbol-card__definition dd sub,
.physics-symbol-card__note sub,
.physics-symbol-card__related-button sub {
    position: relative;
    bottom: -0.28em;
    font-size: 0.62em;
    line-height: 0;
    vertical-align: baseline;
}

.physics-symbol-card__glyph sup,
.physics-symbol-card__description sup,
.physics-symbol-card__definition dd sup,
.physics-symbol-card__note sup,
.physics-symbol-card__related-button sup {
    position: relative;
    top: -0.46em;
    font-size: 0.62em;
    line-height: 0;
    vertical-align: baseline;
}

.physics-symbol-card__names {
    min-width: 0;
}

.physics-symbol-card__name {
    margin: 0;
    color: var(--psc-text);
    font-size: 1.16rem;
    font-weight: 750;
    letter-spacing: -0.01em;
    line-height: 1.35;
}

.physics-symbol-card__english {
    margin: 3px 0 0;
    color: var(--psc-muted);
    font-size: 0.8rem;
    line-height: 1.4;
}

.physics-symbol-card__meta {
    display: flex;
    flex: 0 0 auto;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px;
}

.physics-symbol-card__badge {
    display: inline-flex;
    min-height: 26px;
    align-items: center;
    padding: 3px 9px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1.2;
}

.physics-symbol-card__badge--category {
    background: var(--psc-brand-soft);
    color: var(--psc-brand-dark);
}

.physics-symbol-card__badge--stage {
    border: 1px solid var(--psc-border);
    color: var(--psc-muted);
}

.physics-symbol-card__badge--base {
    border: 1px solid #f2cf5b;
    background: #fff4b8;
    color: #73510c;
}

.physics-symbol-card__description {
    margin-top: 18px;
    color: var(--psc-text);
    font-size: 0.94rem;
    line-height: 1.75;
}

.physics-symbol-card__description strong {
    color: var(--psc-brand-dark);
}

.physics-symbol-card__facts {
    display: grid;
    margin: 18px 0 0;
    overflow: hidden;
    border: 1px solid var(--psc-border);
    border-radius: 13px;
    background: color-mix(in srgb, var(--psc-brand-soft) 28%, white);
}

.physics-symbol-card__definition {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 12px;
    padding: 10px 12px;
}

.physics-symbol-card__definition + .physics-symbol-card__definition {
    border-top: 1px solid var(--psc-border);
}

.physics-symbol-card__definition dt,
.physics-symbol-card__definition dd {
    margin: 0;
}

.physics-symbol-card__definition dt {
    color: var(--psc-muted);
    font-size: 0.76rem;
    font-weight: 700;
}

.physics-symbol-card__definition dd {
    min-width: 0;
    overflow-wrap: anywhere;
    color: var(--psc-text);
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 0.8rem;
    line-height: 1.55;
}

.physics-symbol-card__learning {
    margin-top: 16px;
    padding: 14px;
    border: 1px solid color-mix(in srgb, var(--psc-brand) 18%, var(--psc-border));
    border-radius: 15px;
    background:
        linear-gradient(
            145deg,
            color-mix(in srgb, var(--psc-brand-soft) 58%, white),
            color-mix(in srgb, var(--psc-brand-soft) 22%, white)
        );
}

.physics-symbol-card__learning-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.physics-symbol-card__learning-title {
    margin: 0;
    color: var(--psc-brand-dark);
    font-size: 0.92rem;
    font-weight: 780;
    letter-spacing: -0.01em;
    line-height: 1.4;
}

.physics-symbol-card__learning-scope {
    display: inline-flex;
    min-height: 25px;
    align-items: center;
    flex: 0 0 auto;
    padding: 3px 8px;
    border: 1px solid color-mix(in srgb, var(--psc-brand) 22%, transparent);
    border-radius: 999px;
    background: color-mix(in srgb, var(--psc-brand-soft) 72%, white);
    color: var(--psc-brand-dark);
    font-size: 0.68rem;
    font-weight: 720;
    line-height: 1.2;
}

.physics-symbol-card__learning-context {
    margin: 8px 0 0;
    padding-left: 9px;
    border-left: 2px solid color-mix(in srgb, var(--psc-brand) 45%, transparent);
    color: var(--psc-muted);
    font-size: 0.74rem;
    line-height: 1.6;
}

.physics-symbol-card__guidance {
    display: grid;
    margin: 12px 0 0;
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--psc-brand) 14%, var(--psc-border));
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.7);
}

.physics-symbol-card__guidance .physics-symbol-card__definition {
    display: block;
    padding: 10px 11px;
}

.physics-symbol-card__guidance .physics-symbol-card__definition dt {
    margin-bottom: 3px;
    color: var(--psc-brand-dark);
    font-size: 0.72rem;
}

.physics-symbol-card__guidance .physics-symbol-card__definition dd {
    color: var(--psc-text);
    font-family: inherit;
    font-size: 0.78rem;
    line-height: 1.62;
}

.physics-symbol-card__depth {
    margin-top: 14px;
}

.physics-symbol-card__depth-tabs {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 3px;
    margin-top: 7px;
    padding: 3px;
    border: 1px solid color-mix(in srgb, var(--psc-brand) 14%, var(--psc-border));
    border-radius: 11px;
    background: color-mix(in srgb, var(--psc-brand-soft) 48%, white);
}

.physics-symbol-card__depth-tab {
    min-width: 0;
    min-height: 38px;
    padding: 6px 5px;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: var(--psc-muted);
    font: inherit;
    font-size: 0.7rem;
    font-weight: 680;
    line-height: 1.25;
    cursor: pointer;
}

.physics-symbol-card__depth-tab[aria-selected="true"] {
    background: #fff;
    color: var(--psc-brand-dark);
    box-shadow: 0 1px 4px rgba(41, 55, 36, 0.1);
}

.physics-symbol-card__depth-tab:hover {
    color: var(--psc-brand-dark);
}

.physics-symbol-card__depth-tab:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--psc-brand) 34%, transparent);
    outline-offset: 1px;
}

.physics-symbol-card__depth-panels {
    margin-top: 8px;
}

.physics-symbol-card__depth-panel {
    min-height: 62px;
    padding: 10px 11px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.7);
    color: var(--psc-text);
    font-size: 0.78rem;
    line-height: 1.68;
    outline: none;
}

.physics-symbol-card__depth-panel[hidden] {
    display: none;
}

.physics-symbol-card__depth-panel:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--psc-brand) 28%, transparent);
    outline-offset: 1px;
}

.physics-symbol-card__learning-resources {
    margin-top: 14px;
}

.physics-symbol-card__learning-links {
    display: grid;
    gap: 6px;
    margin-top: 7px;
}

.physics-symbol-card__learning-link {
    display: flex;
    min-height: 44px;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 8px 10px;
    border: 1px solid color-mix(in srgb, var(--psc-brand) 15%, var(--psc-border));
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.74);
    color: var(--psc-text);
    text-decoration: none;
}

.physics-symbol-card__learning-link:hover {
    border-color: color-mix(in srgb, var(--psc-brand) 54%, var(--psc-border));
    background: #fff;
}

.physics-symbol-card__learning-link:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--psc-brand) 34%, transparent);
    outline-offset: 2px;
}

.physics-symbol-card__learning-link-kind {
    flex: 0 0 auto;
    color: var(--psc-muted);
    font-size: 0.66rem;
    font-weight: 680;
}

.physics-symbol-card__learning-link-title {
    min-width: 0;
    overflow: hidden;
    color: var(--psc-brand-dark);
    font-size: 0.76rem;
    font-weight: 720;
    text-align: right;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.physics-symbol-card__note {
    margin-top: 14px;
    padding: 11px 13px;
    border-left: 3px solid #c18b39;
    border-radius: 4px 10px 10px 4px;
    background: #fff8e9;
    color: #684b1f;
    font-size: 0.82rem;
    line-height: 1.65;
}

.physics-symbol-card__aliases {
    display: flex;
    gap: 9px;
    margin-top: 14px;
    color: var(--psc-muted);
    font-size: 0.76rem;
    line-height: 1.5;
}

.physics-symbol-card__section-label {
    margin: 0;
    color: var(--psc-muted);
    font-size: 0.74rem;
    font-weight: 750;
    letter-spacing: 0.04em;
}

.physics-symbol-card__related {
    margin-top: 16px;
}

.physics-symbol-card__related-list {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 8px;
}

.physics-symbol-card__related-button {
    display: inline-flex;
    min-height: 36px;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border: 1px solid var(--psc-border);
    border-radius: 999px;
    background: #fff;
    color: var(--psc-brand-dark);
    font: inherit;
    font-size: 0.76rem;
    font-weight: 650;
    cursor: pointer;
}

.physics-symbol-card__related-button:hover {
    border-color: var(--psc-brand);
    background: var(--psc-brand-soft);
}

.physics-symbol-card__related-button:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--psc-brand) 35%, transparent);
    outline-offset: 2px;
}

.physics-symbol-card--full .physics-symbol-card__glyph {
    width: 72px;
    min-width: 72px;
    height: 72px;
    font-size: 2.2rem;
}

.physics-symbol-card--full .physics-symbol-card__name {
    font-size: 1.35rem;
}

@media (max-width: 520px) {
    .physics-symbol-card__header {
        flex-direction: column;
    }

    .physics-symbol-card__meta {
        justify-content: flex-start;
    }

    .physics-symbol-card__definition {
        grid-template-columns: 76px minmax(0, 1fr);
    }

    .physics-symbol-card__learning {
        padding: 12px;
    }

    .physics-symbol-card__depth-tab {
        min-height: 44px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .physics-symbol-card__learning *,
    .physics-symbol-card__learning *::before,
    .physics-symbol-card__learning *::after {
        scroll-behavior: auto !important;
        transition-duration: 1ms !important;
    }
}

@media (prefers-contrast: more) {
    .physics-symbol-card__learning,
    .physics-symbol-card__guidance,
    .physics-symbol-card__depth-tabs,
    .physics-symbol-card__learning-link {
        border-color: currentColor;
    }

    .physics-symbol-card__depth-tab[aria-selected="true"] {
        outline: 2px solid currentColor;
        outline-offset: -2px;
    }
}