.period-page__body {
    padding: 26px;
}

.period-page__shell {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
}

.period-page__main {
    min-width: 0;
    max-width: none;
}

.period-page__copy {
    margin-top: 0;
}

.period-page__lead {
    font-size: 1.04rem;
    line-height: 1.75;
}

.period-copy-section + .period-copy-section {
    margin-top: 30px;
}

.period-copy-section h2 {
    margin-bottom: 12px;
    font-size: clamp(1.2rem, 1.8vw, 1.6rem);
}

.period-copy-section p:last-child {
    margin-bottom: 0;
}


/* =========================================================
   Boční menu s výběrem firem
   ========================================================= */

.period-side-panel {
    align-self: start;
    padding: 20px 16px;
    border: 2px solid var(--line);
    background: linear-gradient(
        to bottom,
        rgba(255, 246, 229, 0.92),
        rgba(232, 204, 166, 0.92)
    );
    box-shadow: 0 4px 14px rgba(25, 18, 12, 0.08);
}

.period-side-panel__title {
    margin: 0 0 14px;
    padding: 0 0 12px;
    border-bottom: 2px solid var(--line);
    text-align: center;
    font-size: 1.05rem;
}

.period-side-panel__nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.period-side-panel__nav a,
.period-side-panel__item {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 34px;
    padding: 7px 10px 7px 30px;
    border: 2px solid var(--line);
    background: linear-gradient(to bottom, #f8ead1, #e2bd82);
    color: var(--ink);
    font-size: 0.76rem;
    font-weight: 700;
    line-height: 1.2;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.45),
        0 2px 0 rgba(45, 34, 25, 0.18);
}

.period-side-panel__nav a {
    transition:
        background 0.18s ease,
        transform 0.18s ease;
}

.period-side-panel__nav a::before,
.period-side-panel__item::before {
    content: "›";
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.15rem;
    line-height: 1;
}

.period-side-panel__nav a:hover,
.period-side-panel__nav a:focus-visible {
    background: linear-gradient(to bottom, #fff1d6, #d89b45);
    transform: translateX(3px);
    outline: none;
}

/* Firmy bez připraveného detailu jsou zatím pouze textové položky. */
.period-side-panel__item {
    cursor: default;
}

.period-firm-reference {
    scroll-margin-top: 30px;
}


/* =========================================================
   Fotografie expozice
   ========================================================= */

.period-photo-card {
    display: block;
    width: 100%;
    margin: 0;
}

.period-photo-card img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
    border: 2px solid var(--line);
    background: rgba(255, 250, 242, 0.45);
}

/* Úvodní fotografie je nad menu a zabírá celou šířku bloku. */
.period-page__hero {
    width: 100%;
    margin: 0;
}

.period-page__hero img {
    width: 100%;
    max-height: none;
}

/* Druhá fotografie je roztažená přes pravý sloupec vedle menu. */
.period-photo-card--inline {
    width: 100%;
    margin-top: 24px;
}

.period-photo-card--inline img {
    max-height: none;
}

/* Připravené pro případné pozdější znovuzapnutí zakomentované galerie. */
.period-photo-stack {
    display: grid;
    gap: 22px;
    margin-top: 24px;
}


/* =========================================================
   Responzivní zobrazení
   ========================================================= */

@media (max-width: 1220px) {
    .period-page__shell {
        grid-template-columns: 280px minmax(0, 1fr);
        gap: 22px;
    }
}

@media (max-width: 980px) {
    .period-page__shell {
        grid-template-columns: 1fr;
    }

    .period-page__main {
        max-width: none;
    }
}

@media (max-width: 760px) {
    .period-page__body {
        padding: 18px;
    }

    .period-side-panel {
        padding: 16px 14px;
    }

    .period-side-panel__nav {
        gap: 5px;
    }

    .period-side-panel__nav a,
    .period-side-panel__item {
        min-height: 36px;
        font-size: 0.76rem;
    }
}