.topic-shell {
    width: min(1220px, calc(100% - 32px));
    margin: 0 auto;
}

.topic-back {
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 14px;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 650;
    text-decoration: none;
}

.topic-back:hover {
    color: var(--gold);
}

.topic-back .icon {
    transform: rotate(180deg);
}

.topic-hero {
    min-height: 330px;
    display: grid;
    grid-template-columns: minmax(300px, 0.88fr) minmax(0, 1.12fr);
    align-items: center;
    gap: clamp(28px, 6vw, 78px);
    padding: 24px 0 38px;
    border-bottom: 1px solid var(--line);
}

.topic-cover {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow-soft);
}

.topic-cover img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.topic-cover.is-intro {
    border-color: transparent;
    background: transparent;
    box-shadow: none;
}

.topic-cover.is-intro img {
    object-fit: contain;
    mix-blend-mode: multiply;
}

.topic-cover.is-intro .theme-art-dark {
    display: none;
}

body[data-theme="dark"] .topic-cover.is-intro .theme-art-light {
    display: none;
}

body[data-theme="dark"] .topic-cover.is-intro .theme-art-dark {
    display: block;
    mix-blend-mode: normal;
}

.topic-kicker {
    margin: 0 0 8px;
    color: var(--gold);
    font-size: 0.68rem;
    font-weight: 750;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.topic-copy h1 {
    margin: 0 0 9px;
    font-family: Georgia, "Times New Roman", serif;
    font-size: clamp(2.4rem, 5vw, 4.8rem);
    font-weight: 500;
    letter-spacing: 0;
    line-height: 0.98;
}

.topic-subtitle {
    margin: 0 0 18px;
    color: var(--gold);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.34rem;
    font-style: italic;
}

.topic-lead {
    max-width: 660px;
    margin: 0;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.75;
}

.topic-narrative {
    padding: 36px 0 12px;
}

.narrative-layer {
    display: grid;
    grid-template-columns: minmax(150px, 0.55fr) minmax(0, 1.45fr);
    gap: 32px;
    padding: 28px 0;
    border-top: 1px solid var(--line);
}

.narrative-layer:last-child {
    border-bottom: 1px solid var(--line);
}

.narrative-layer h2 {
    margin: 0 0 10px;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.7rem;
    font-weight: 500;
}

.narrative-layer p:last-child {
    max-width: 680px;
    margin: 0;
    color: var(--muted);
    line-height: 1.75;
}

.topic-featured,
.topic-feed {
    padding: 34px 0 10px;
}

.topic-featured {
    padding-bottom: 6px;
}

.topic-feed-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 16px;
}

.topic-feed-heading p {
    margin: 0 0 3px;
    color: var(--gold);
    font-size: 0.67rem;
    font-weight: 750;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.topic-feed-heading h2 {
    margin: 0;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.7rem;
    font-weight: 500;
}

.topic-feed-heading > span {
    max-width: 440px;
    color: var(--muted);
    font-size: 0.78rem;
    text-align: right;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.fixed-content-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.content-card {
    min-width: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(16px) saturate(125%);
    transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.content-card:hover {
    transform: translateY(-2px);
    border-color: var(--line-strong);
    box-shadow: var(--shadow);
}

.content-card.is-locked {
    background: color-mix(in srgb, var(--gold) 5%, var(--surface));
}

.content-card.is-fixed {
    border-color: var(--line-strong);
}

.content-card.is-workbook {
    background: color-mix(in srgb, var(--gold) 8%, var(--surface));
}

.content-card.is-fixed .content-main {
    display: grid;
    grid-template-columns: minmax(150px, 0.42fr) minmax(0, 0.58fr);
    gap: 14px;
    padding: 10px;
}

.content-card.is-fixed .content-media {
    height: 100%;
    min-height: 170px;
    aspect-ratio: auto;
}

.content-card.is-fixed .content-copy {
    min-height: 0;
    justify-content: center;
    padding: 8px 8px 8px 0;
}

.content-card.is-fixed .content-copy strong {
    font-size: 1.28rem;
}

.content-card.is-fixed .content-actions {
    min-height: 48px;
    padding-top: 6px;
    padding-bottom: 7px;
}

.content-card.is-hidden {
    display: none;
}

.content-main {
    width: 100%;
    display: block;
    flex: 1;
    padding: 10px 10px 0;
    border: 0;
    color: inherit;
    background: transparent;
    cursor: pointer;
    text-decoration: none;
    text-align: left;
}

.content-media {
    position: relative;
    aspect-ratio: 4 / 3;
    display: block;
    overflow: hidden;
    border-radius: 7px;
    background: var(--surface-solid);
}

.content-media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 58%, rgba(8, 9, 8, 0.42));
    pointer-events: none;
}

.content-media img,
.content-media video {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    transition: transform 260ms ease;
}

.content-media video { background: #111; }

.content-duration {
    position: absolute;
    right: 9px;
    bottom: 9px;
    z-index: 2;
    padding: 4px 6px;
    border-radius: 4px;
    color: #fff;
    background: rgba(16, 15, 12, .78);
    font-size: 11px;
    font-weight: 750;
    line-height: 1;
}

.content-card:nth-child(2n) .content-media img {
    object-position: 72% center;
    transform: scale(1.12);
}

.content-card:nth-child(3n) .content-media img {
    object-position: 28% center;
    transform: scale(1.08);
}

.content-card:hover .content-media img {
    transform: scale(1.04);
}

.content-card:nth-child(2n):hover .content-media img {
    transform: scale(1.15);
}

.content-status {
    position: absolute;
    top: 9px;
    right: 9px;
    z-index: 1;
    min-height: 28px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 0 9px;
    border: 1px solid rgba(255, 255, 255, 0.42);
    border-radius: 7px;
    color: #17140d;
    background: rgba(245, 229, 187, 0.88);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.16);
    font-size: 0.64rem;
    font-weight: 750;
    backdrop-filter: blur(12px);
}

.content-status.is-open {
    color: #153429;
    background: rgba(222, 239, 229, 0.9);
}

.content-status.is-product {
    color: #251d0d;
    background: rgba(235, 196, 99, 0.94);
}

.content-status .icon {
    width: 13px;
    height: 13px;
}

.content-copy {
    min-height: 164px;
    display: flex;
    flex-direction: column;
    padding: 14px 3px 13px;
}

.content-type {
    margin-bottom: 7px;
    color: var(--gold);
    font-size: 0.61rem;
    font-weight: 750;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.content-copy strong {
    margin-bottom: 8px;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.12rem;
    font-weight: 500;
    line-height: 1.22;
}

.content-copy > span:last-child {
    color: var(--muted);
    font-size: 0.8rem;
    line-height: 1.5;
}

.content-actions {
    min-height: 54px;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: auto;
    padding: 8px 10px 10px;
    border-top: 1px solid var(--line);
}

.content-actions button,
.content-actions a {
    min-width: 34px;
    min-height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: 0 7px;
    border: 1px solid var(--line);
    border-radius: 7px;
    color: var(--muted);
    background: transparent;
    cursor: pointer;
    font-size: 0.69rem;
    text-decoration: none;
}

.content-actions button:hover,
.content-actions a:hover,
.content-actions button[aria-pressed="true"] {
    color: var(--gold);
    border-color: var(--line-strong);
    background: color-mix(in srgb, var(--gold) 8%, transparent);
}

.content-actions [data-content-state="liked"]:hover,
.content-actions [data-content-state="liked"][aria-pressed="true"] {
    color: var(--rose);
}

.content-actions .content-open {
    margin-left: auto;
    padding: 0 9px;
    color: var(--text);
    border-color: transparent;
    font-weight: 650;
}

.library-item a {
    min-height: 34px;
    display: inline-flex;
    align-items: center;
    padding: 0 10px;
    border: 1px solid var(--line);
    border-radius: 7px;
    color: var(--text);
    text-decoration: none;
}

.content-empty {
    padding: 32px;
    border: 1px dashed var(--line);
    border-radius: 8px;
    color: var(--muted);
    text-align: center;
}

.guide-discussion {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 30px;
    margin: 34px 0 18px;
    padding: 28px 0;
    border-top: 1px solid var(--line);
}

.guide-discussion h2 {
    margin: 0 0 7px;
    font-family: Georgia, "Times New Roman", serif;
    font-size: 1.65rem;
    font-weight: 500;
}

.guide-discussion p:last-child {
    max-width: 720px;
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
}

.product-preview {
    margin-top: 22px;
    padding: 30px;
    border: 1px solid var(--line-strong);
    border-radius: 10px;
    background: color-mix(in srgb, var(--gold) 7%, var(--surface));
    box-shadow: var(--shadow-soft);
}

.product-preview-status {
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 15px;
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    color: var(--text);
    background: var(--surface);
    font-size: 0.76rem;
    font-weight: 700;
    text-align: center;
}

@media (max-width: 1060px) {
    .content-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 790px) {
    .topic-hero {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .topic-cover {
        max-height: 430px;
    }

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

    .fixed-content-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .topic-shell {
        width: min(100% - 20px, 34rem);
    }

    .topic-back {
        margin-top: -4px;
    }

    .topic-hero {
        min-height: 0;
        padding: 8px 0 28px;
    }

    .topic-copy h1 {
        font-size: 2.55rem;
    }

    .narrative-layer {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 24px 0;
    }

    .topic-feed {
        padding-top: 24px;
    }

    .topic-featured {
        padding-top: 24px;
    }

    .topic-feed-heading {
        align-items: start;
        flex-direction: column;
        gap: 8px;
    }

    .topic-feed-heading > span {
        text-align: left;
    }

    .content-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .content-card.is-fixed .content-main {
        grid-template-columns: 38% minmax(0, 1fr);
        gap: 11px;
    }

    .content-card.is-fixed .content-media {
        min-height: 138px;
    }

    .content-card.is-fixed .content-copy {
        padding-right: 3px;
    }

    .content-card.is-fixed .content-copy strong {
        font-size: 1.08rem;
    }

    .content-card.is-fixed .content-copy > span:last-child {
        display: -webkit-box;
        overflow: hidden;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 3;
    }

    .content-copy {
        min-height: 0;
    }

    .guide-discussion {
        grid-template-columns: 1fr;
        gap: 18px;
    }
}