:root {
    --moon-bg: #020204;
    --moon-text: #ffffff;
    --moon-muted: rgba(255,255,255,0.68);
    --moon-line: rgba(255,255,255,0.14);
    --moon-panel: rgba(255,255,255,0.045);
    --moon-glow: rgba(241, 210, 123, 0.22);
    --moon-space-2: 12px;
    --moon-space-3: 16px;
    --moon-space-4: 24px;
    --moon-space-5: 32px;
    --moon-space-6: 56px;
    --moon-space-7: 88px;
    --moon-space-8: 112px;
    --moon-copy-width: 660px;
    --moon-card-title-row: 96px;
    --moon-card-title-row-large: 128px;
    --moon-body-leading: 24px;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(circle at 50% -18%, rgba(255,255,255,0.14), transparent 30rem),
        radial-gradient(circle at 14% 42%, rgba(241,210,123,0.08), transparent 26rem),
        #020204;
    color: var(--moon-text);
    overflow-x: hidden;
}

.moon-today-shell {
    width: min(1080px, calc(100% - 112px));
    margin: 0 auto;
    padding: 40px 0 96px;
}

.moon-topbar {
    margin-bottom: 48px;
}

.moon-topbar nav a[aria-current="page"] {
    color: #f1d27b;
}

.moon-portrait-hero {
    min-height: min(760px, calc(100vh - 120px));
    display: grid;
    grid-template-columns: minmax(320px, 0.92fr) minmax(360px, 0.98fr);
    align-items: center;
    gap: clamp(36px, 5vw, 64px);
    border-bottom: 1px solid var(--moon-line);
    padding: var(--moon-space-6) 0 var(--moon-space-8);
}

.moon-portrait-stage {
    position: relative;
    display: grid;
    place-items: center;
    aspect-ratio: 1;
}

.moon-portrait-stage::before {
    content: '';
    position: absolute;
    inset: 4%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,0.12), transparent 68%);
    filter: blur(18px);
}

.nasa-moon-image {
    position: relative;
    z-index: 2;
    width: min(78vw, 620px);
    height: auto;
    border-radius: 50%;
    -webkit-mask-image: url('../assets/mask_moon.jpg');
    mask-image: url('../assets/mask_moon.jpg');
    -webkit-mask-size: 100% 100%;
    mask-size: 100% 100%;
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-mode: luminance;
    mask-mode: luminance;
    clip-path: circle(48.5% at 50% 50%);
    opacity: 0;
    transform: rotate(var(--moon-light-angle, 0deg)) scale(0.985);
    transition: opacity 0.9s ease, transform 0.9s ease, filter 0.9s ease;
    filter:
        drop-shadow(0 42px 95px rgba(0,0,0,0.76))
        drop-shadow(0 0 42px var(--moon-glow));
}

.nasa-moon-image.is-loaded {
    opacity: 1;
    transform: rotate(var(--moon-light-angle, 0deg)) scale(1);
}

.moon-portrait-ring {
    position: absolute;
    inset: 8%;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.12);
    box-shadow: inset 0 0 70px rgba(255,255,255,0.05), 0 0 70px rgba(255,255,255,0.04);
    z-index: 1;
}

.moon-copy {
    position: relative;
    z-index: 3;
    min-width: 0;
    width: min(100%, var(--moon-copy-width));
    max-width: var(--moon-copy-width);
    padding-inline: clamp(28px, 3vw, 48px);
    justify-self: end;
}

.moon-copy h1 {
    font-size: clamp(4rem, 8vw, 7.8rem);
    margin: 0 0 var(--moon-space-3);
    color: var(--moon-text);
    overflow-wrap: anywhere;
}

.phase-summary {
    max-width: 58ch;
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 2.7vw, 2.25rem);
    line-height: 1.24;
    color: rgba(255,255,255,0.9);
    margin: 0;
}

.phase-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--moon-space-2);
    margin: var(--moon-space-6) 0 var(--moon-space-5);
}

.phase-metrics article {
    border: 1px solid var(--moon-line);
    border-radius: 8px;
    background: var(--moon-panel);
    padding: 20px;
    display: grid;
    align-content: start;
    gap: 8px;
}

.phase-metrics span {
    display: block;
    color: var(--moon-muted);
    font-size: 0.68rem;
    letter-spacing: 1.7px;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.phase-metrics strong {
    font-size: 1.1rem;
    font-weight: 500;
}

.phase-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.next-phases {
    margin: var(--moon-space-6) 0 var(--moon-space-5);
}

.next-phase-list {
    display: grid;
    gap: var(--moon-space-2);
    margin-top: var(--moon-space-2);
}

.next-phase-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: baseline;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--moon-line);
    color: rgba(255,255,255,0.78);
    font-family: var(--font-ui);
    font-size: 0.88rem;
}

.next-phase-item strong {
    color: var(--moon-text);
    font-weight: 500;
}

.image-credit {
    max-width: 620px;
    color: rgba(255,255,255,0.48);
    font-size: 0.78rem;
    margin-top: 22px;
}

.phase-story {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--moon-space-5);
    padding-top: var(--moon-space-8);
    align-items: stretch;
}

.phase-story article {
    border: 1px solid var(--moon-line);
    border-radius: 8px;
    background: var(--moon-panel);
    padding: 36px;
    display: grid;
    grid-template-rows: 16px minmax(var(--moon-card-title-row-large), auto) 1fr;
    align-content: start;
    gap: var(--moon-space-4);
}

.phase-story h2 {
    color: var(--moon-text);
    margin: 0;
    line-height: 1.08;
    align-self: start;
}

.phase-story p {
    margin: 0;
    line-height: var(--moon-body-leading);
    align-self: start;
}

.phase-seo-guide,
.phase-faq {
    border-top: 1px solid var(--moon-line);
    margin-top: var(--moon-space-8);
    padding-top: var(--moon-space-7);
}

.phase-seo-guide,
.phase-story,
.phase-link-map,
.phase-faq {
    width: min(100%, 1180px);
    margin-left: auto;
    margin-right: auto;
    padding-left: clamp(40px, 5vw, 88px);
    padding-right: clamp(40px, 5vw, 88px);
    box-sizing: border-box;
}

.phase-seo-guide {
    display: grid;
    gap: var(--moon-space-7);
}

.phase-link-map {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--moon-space-6);
    align-items: end;
    border-top: 1px solid var(--moon-line);
    margin-top: var(--moon-space-8);
    padding-top: var(--moon-space-7);
}

.phase-link-map h2 {
    color: var(--moon-text);
    font-size: clamp(2.2rem, 4.5vw, 4rem);
    line-height: 1;
    margin: 8px 0 var(--moon-space-3);
}

.phase-link-map p {
    color: var(--moon-muted);
    max-width: 760px;
    line-height: var(--moon-body-leading);
    margin: 0;
}

.phase-link-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.guide-intro {
    max-width: 820px;
    margin-bottom: 0;
}

.guide-intro h2,
.phase-faq h2 {
    color: var(--moon-text);
    font-size: clamp(2.4rem, 5vw, 4.4rem);
    line-height: 0.98;
    margin: 12px 0 var(--moon-space-5);
}

.guide-intro p {
    max-width: 72ch;
}

.guide-intro p,
.guide-grid p,
.phase-faq p {
    color: var(--moon-muted);
    line-height: var(--moon-body-leading);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--moon-space-5);
    align-items: stretch;
}

.guide-grid article {
    border: 1px solid var(--moon-line);
    border-radius: 8px;
    background: var(--moon-panel);
    padding: 36px;
    display: grid;
    grid-template-rows: auto 1fr;
    align-content: start;
    gap: var(--moon-space-5);
    min-height: 360px;
}

.guide-grid h3 {
    color: var(--moon-text);
    margin: 0;
    line-height: 1.18;
    align-self: start;
}

.guide-grid p {
    margin: 0;
    align-self: start;
}

.phase-faq details,
.faq-item {
    border-top: 1px solid var(--moon-line);
    padding: 0;
}

.phase-faq summary,
.faq-item summary {
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--moon-space-4);
    cursor: pointer;
    color: var(--moon-text);
    font-family: var(--font-display);
    font-size: clamp(1.35rem, 2.3vw, 1.75rem);
    line-height: 1.12;
    list-style: none;
}

.phase-faq summary::-webkit-details-marker,
.faq-item summary::-webkit-details-marker {
    display: none;
}

.phase-faq summary::after,
.faq-item summary::after {
    content: '+';
    flex: 0 0 auto;
    color: #f1d27b;
    font-family: var(--font-ui);
    font-size: 1.2rem;
    line-height: 1;
}

.phase-faq details[open] summary::after,
.faq-item[open] summary::after {
    content: '-';
}

.phase-faq details p {
    padding-bottom: var(--moon-space-4);
}

@media (max-width: 900px) {
    .moon-portrait-hero {
        grid-template-columns: 1fr;
        gap: 20px;
        text-align: left;
    }

    .moon-portrait-stage {
        order: -1;
        max-width: 620px;
        margin: 0 auto;
    }

    .phase-story,
    .phase-link-map {
        grid-template-columns: 1fr;
    }

    .phase-link-actions {
        justify-content: flex-start;
    }

    .guide-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 680px) {
    .moon-today-shell {
        width: min(100% - 40px, 1120px);
        padding-top: 32px;
    }

    .moon-portrait-hero {
        min-height: auto;
        padding-top: var(--moon-space-4);
    }

    .moon-copy {
        width: 100%;
        max-width: none;
        padding-inline: 8px;
        justify-self: stretch;
    }

    .moon-copy h1 {
        font-size: clamp(3.05rem, 14vw, 5.2rem);
    }

    .nasa-moon-image {
        width: min(92vw, 520px);
    }

    .phase-metrics {
        grid-template-columns: 1fr;
    }

    .guide-grid {
        grid-template-columns: 1fr;
    }

    .phase-seo-guide,
    .phase-story,
    .phase-link-map,
    .phase-faq {
        padding-left: 24px;
        padding-right: 24px;
    }

    .guide-grid article,
    .phase-story article {
        grid-template-rows: auto auto;
        padding: 28px;
    }

    .next-phase-item {
        display: grid;
        grid-template-columns: 1fr;
        gap: 4px;
    }
}