:root {
    --bg: #0a0d12;
    --bg-2: #11161d;
    --panel: rgba(18, 24, 32, 0.84);
    --panel-strong: rgba(14, 19, 27, 0.94);
    --line: rgba(132, 149, 171, 0.18);
    --line-strong: rgba(150, 168, 191, 0.26);
    --text: #edf3fb;
    --muted: #9aa8ba;
    --accent: #8fb3e8;
    --accent-soft: rgba(143, 179, 232, 0.14);
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.34);
    --radius: 18px;
    --max: 1240px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Inter, "Noto Sans JP", system-ui, -apple-system, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(120, 145, 190, 0.08) 0%, rgba(120, 145, 190, 0.02) 20%, transparent 42%),
        radial-gradient(circle at top right, rgba(255, 255, 255, 0.04) 0%, transparent 26%),
        linear-gradient(180deg, #0a0d12 0%, #0d1117 46%, #11161d 100%);
    line-height: 1.65;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
}

.container {
    width: min(calc(100% - 32px), var(--max));
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    backdrop-filter: blur(18px);
    background: rgba(10, 13, 18, 0.72);
    border-bottom: 1px solid var(--line);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    gap: 20px;
}

.brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.brand__title {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.brand__sub {
    font-size: 0.78rem;
    color: var(--muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.nav {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.nav a {
    font-size: 0.92rem;
    color: var(--muted);
    transition: color .2s ease;
}

.nav a:hover,
.nav a.is-active {
    color: var(--text);
}

.hero {
    padding: 52px 0 28px;
}

.hero__card {
    display: grid;
    grid-template-columns: 1.25fr 0.9fr;
    gap: 24px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: calc(var(--radius) + 6px);
    background: linear-gradient(180deg, rgba(17, 22, 29, 0.92), rgba(12, 16, 22, 0.88));
    box-shadow: var(--shadow);
}

.hero__eyebrow {
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--accent);
    margin-bottom: 10px;
    font-weight: 700;
}

.hero h1 {
    margin: 0 0 12px;
    font-size: clamp(2rem, 4vw, 3.25rem);
    line-height: 1.15;
    letter-spacing: -0.03em;
}

.hero p {
    margin: 0;
    color: #536172;
    max-width: 44em;
}

.hero__meta {
    display: grid;
    gap: 12px;
    align-content: start;
}

.meta-box {
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: linear-gradient(180deg, rgba(20, 27, 36, 0.88), rgba(15, 20, 28, 0.92));
}

.meta-box__label {
    display: block;
    font-size: 0.76rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
}

.meta-box__value {
    font-size: 0.98rem;
    font-weight: 600;
}

.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    margin: 18px 0 24px;
}

.chips {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.chip {
    border: 1px solid var(--line);
    background: rgba(18, 24, 32, 0.88);
    color: var(--muted);
    padding: 9px 14px;
    border-radius: 999px;
    font-size: 0.88rem;
    cursor: pointer;
    transition: all .18s ease;
}

.chip:hover,
.chip.is-active {
    color: var(--text);
    background: var(--accent-soft);
    border-color: var(--line-strong);
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.22);
}

.toolbar__right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.search,
.sort {
    height: 42px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: rgba(18, 24, 32, 0.9);
    color: var(--text);
    padding: 0 16px;
    font-size: 0.92rem;
    outline: none;
}

.search {
    min-width: min(320px, 75vw);
}

.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 18px;
    padding-bottom: 42px;
}

.gallery__items {
    display: contents;
}

.card {
    border: 1px solid var(--line);
    border-radius: 22px;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(17, 22, 29, 0.98), rgba(13, 17, 24, 0.98));
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.24);
    transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 22px 40px rgba(0, 0, 0, 0.34);
    border-color: var(--line-strong);
}

.card__link {
    display: block;
}

.card__thumb {
    aspect-ratio: 2 / 3;
    background: linear-gradient(180deg, #151b23 0%, #0f141b 100%);
    overflow: hidden;
}

.card__thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card__body {
    padding: 14px 14px 16px;
}

.card__title {
    margin: 0 0 6px;
    font-size: 0.96rem;
    line-height: 1.4;
}

.card__date {
    font-size: 0.8rem;
    color: var(--muted);
    margin-bottom: 10px;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    font-size: 0.74rem;
    color: #bdd0e6;
    background: rgba(143, 179, 232, 0.08);
    border: 1px solid rgba(143, 179, 232, 0.14);
    border-radius: 999px;
    padding: 5px 9px;
}

.ad-slot {
    display: grid;
    place-items: center;
    min-height: 280px;
    border: 1px dashed rgba(160, 177, 198, 0.26);
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(17, 22, 29, 0.58), rgba(11, 15, 21, 0.9));
    color: var(--muted);
    text-align: center;
    padding: 20px;
}

.ad-slot small {
    display: block;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.gallery-empty {
    margin: 0 0 42px;
    color: var(--muted);
}

.viewer {
    padding: 30px 0 72px;
    border-top: 1px solid var(--line);
}

.viewer__layout {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(280px, 360px);
    gap: 26px;
    align-items: start;
}

.viewer__image {
    border: 1px solid var(--line);
    border-radius: 26px;
    overflow: hidden;
    background: #0f141b;
    box-shadow: var(--shadow);
}

.viewer__image img {
    width: 100%;
    height: auto;
}

.viewer__side {
    display: grid;
    gap: 16px;
    position: sticky;
    top: 92px;
}

.panel {
    border: 1px solid var(--line);
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(19, 25, 34, 0.94), rgba(14, 19, 27, 0.96));
    padding: 18px;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
}

.panel h2,
.panel h3 {
    margin: 0 0 12px;
    font-size: 1rem;
}

.panel p {
    margin: 0;
    color: #a9b5c4;
    font-size: 0.93rem;
}

.actions {
    display: grid;
    gap: 10px;
    margin-top: 14px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: rgba(18, 24, 32, 0.9);
    color: var(--text);
    padding: 0 16px;
    font-size: 0.92rem;
    transition: all .2s ease;
}

.button:hover {
    transform: translateY(-1px);
    border-color: var(--line-strong);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.24);
}

.button--primary {
    background: linear-gradient(180deg, rgba(143, 179, 232, 0.18), rgba(143, 179, 232, 0.08));
}

.license {
    padding: 22px 0 80px;
    border-top: 1px solid rgba(228, 232, 238, 0.75);
}

.license__box {
    padding: 24px;
    border-radius: 24px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.76);
    box-shadow: var(--shadow);
}

.license__box h2 {
    margin: 0 0 10px;
    font-size: 1.2rem;
}

.license__box p {
    margin: 0 0 10px;
    color: #556273;
}

.license__box ul {
    margin: 12px 0 0;
    padding-left: 1.2em;
    color: #556273;
}

.site-footer {
    padding: 26px 0 54px;
    color: var(--muted);
    font-size: 0.88rem;
}

.site-footer__inner {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    border-top: 1px solid rgba(228, 232, 238, 0.9);
    padding-top: 18px;
}

@media (max-width: 960px) {

    .hero__card,
    .viewer__layout {
        grid-template-columns: 1fr;
    }

    .viewer__side {
        position: static;
    }
}

@media (max-width: 640px) {

    .site-header__inner,
    .toolbar {
        align-items: flex-start;
    }

    .hero {
        padding-top: 34px;
    }

    .hero__card {
        padding: 20px;
    }

    .gallery {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 14px;
    }

    .search {
        min-width: 100%;
    }
}