:root {
    --paper: #efe3c7;
    --paper-deep: #ddc89f;
    --paper-light: #f6ecd7;
    --ink: #26211a;
    --muted: #4f4538;
    --poster-blue: #123a67;
    --poster-red: #9e2b1f;
    --poster-red-dark: #7a1e17;
    --line: rgba(38, 33, 26, 0.2);
    --shadow: 0 14px 30px rgba(34, 24, 17, 0.2);
    --radius-soft: 14px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 125%;
}

body {
    margin: 0;
    font-family: "PT Sans", "Segoe UI", sans-serif;
    font-size: clamp(1.12rem, 0.35vw + 1.02rem, 1.22rem);
    color: var(--ink);
    background:
        radial-gradient(circle at 17% 14%, rgba(255, 255, 255, 0.3), transparent 42%),
        radial-gradient(circle at 78% 28%, rgba(255, 255, 255, 0.17), transparent 40%),
        linear-gradient(180deg, #f4ead4 0%, var(--paper) 52%, #e5d0a8 100%);
    line-height: 1.62;
}

.page-museum {
    position: relative;
}

.page-museum::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: radial-gradient(rgba(43, 30, 20, 0.05) 0.8px, transparent 0.8px);
    background-size: 3px 3px;
    opacity: 0.28;
}

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

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

.container {
    width: min(1160px, calc(100% - 2rem));
    margin: 0 auto;
}

.hero > .container,
.section > .container,
.cta-band > .container {
    position: relative;
    z-index: 1;
}

[class*="era-bg-"] {
    overflow: hidden;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
}

.era-bg-01 {
    background-image:
        linear-gradient(125deg, rgba(244, 234, 212, 0.82) 0%, rgba(236, 219, 188, 0.76) 100%),
        url("../assets/bg/bg-era-01-samovar-kitchen.png");
}

.era-bg-02 {
    background-image:
        linear-gradient(180deg, rgba(246, 236, 216, 0.86), rgba(239, 227, 199, 0.8)),
        url("../assets/bg/bg-era-02-pioneer-school.png");
    background-position: right center;
}

.era-bg-03 {
    background-image:
        linear-gradient(180deg, rgba(244, 234, 212, 0.86), rgba(236, 219, 188, 0.8)),
        url("../assets/bg/bg-era-03-kvn-radio.png");
    background-position: left center;
}

.era-bg-04 {
    background-image:
        linear-gradient(180deg, rgba(246, 236, 216, 0.84), rgba(239, 227, 199, 0.78)),
        url("../assets/bg/bg-era-04-khrushchevka.png");
}

.era-bg-04.era-bg--showcase {
    background-image:
        linear-gradient(180deg, rgba(246, 236, 216, 0.68), rgba(239, 227, 199, 0.58)),
        url("../assets/bg/bg-era-04-khrushchevka.png");
    background-position: center;
    background-size: cover;
}

.era-bg-05 {
    background-image:
        linear-gradient(180deg, rgba(246, 236, 216, 0.86), rgba(239, 227, 199, 0.8)),
        url("../assets/bg/bg-era-05-rekord-gramophone.png");
    background-position: left center;
}

.era-bg-06 {
    background-image:
        linear-gradient(90deg, rgba(15, 47, 83, 0.88) 0%, rgba(18, 58, 103, 0.84) 50%, rgba(158, 43, 31, 0.8) 100%),
        url("../assets/bg/bg-era-06-elektronika-cassettes.png");
}

.era-bg-06.era-bg--dark {
    background-image:
        linear-gradient(90deg, rgba(15, 47, 83, 0.9) 0%, rgba(18, 58, 103, 0.86) 48%, rgba(158, 43, 31, 0.82) 100%),
        url("../assets/bg/bg-era-06-elektronika-cassettes.png");
}

.era-bg-07 {
    background-image:
        linear-gradient(180deg, rgba(14, 45, 77, 0.92), rgba(10, 33, 58, 0.94)),
        url("../assets/bg/bg-era-07-avoska-queue.png");
    background-position: center bottom;
}

.era-bg-08 {
    background-image:
        linear-gradient(180deg, rgba(246, 236, 216, 0.88), rgba(239, 227, 199, 0.82)),
        url("../assets/bg/bg-era-08-school-uniform.png");
    background-position: right center;
}

.era-bg-09 {
    background-image:
        linear-gradient(90deg, rgba(14, 45, 77, 0.94) 0%, rgba(18, 58, 103, 0.9) 60%, rgba(122, 30, 23, 0.88) 100%),
        url("../assets/bg/bg-era-09-cooperative-kiosk.png");
    background-position: right center;
}

.era-bg-10 {
    background-image:
        linear-gradient(125deg, rgba(244, 234, 212, 0.82) 0%, rgba(236, 219, 188, 0.76) 100%),
        url("../assets/bg/bg-era-10-iron-laundry.png");
}

.era-bg-11 {
    background-image:
        linear-gradient(180deg, rgba(244, 234, 212, 0.86), rgba(236, 219, 188, 0.8)),
        url("../assets/bg/bg-epochs-ussr.png");
}

.era-bg-12 {
    background-image:
        linear-gradient(180deg, rgba(246, 236, 216, 0.86), rgba(239, 227, 199, 0.8)),
        url("../assets/bg/bg-soviet-household.png");
    background-position: right center;
}

.era-bg-13 {
    background-image:
        linear-gradient(180deg, rgba(246, 236, 216, 0.86), rgba(239, 227, 199, 0.8)),
        url("../assets/bg/bg-era-13-newyear-home.png");
    background-position: center;
}

.era-bg-14 {
    background-image:
        linear-gradient(180deg, rgba(246, 236, 216, 0.88), rgba(239, 227, 199, 0.82)),
        url("../assets/bg/bg-era-14-dacha.png");
    background-position: left center;
}

.era-bg-15 {
    background-image:
        linear-gradient(90deg, rgba(15, 47, 83, 0.88) 0%, rgba(18, 58, 103, 0.84) 50%, rgba(158, 43, 31, 0.8) 100%),
        url("../assets/bg/bg-era-15-pioneer-camp.png");
    background-position: center;
}

.era-tag {
    margin: 0 0 0.55rem;
    display: inline-block;
    padding: 0.22rem 0.55rem;
    font-family: "Oswald", sans-serif;
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #7a1e17;
    border: 1px solid rgba(122, 30, 23, 0.45);
    background: rgba(248, 236, 212, 0.75);
}

.era-tag--light {
    color: #ffe4b0;
    border-color: rgba(255, 228, 176, 0.5);
    background: rgba(18, 58, 103, 0.45);
}

.gallery-stack {
    display: flex;
    flex-direction: column;
}

.gallery-row {
    position: relative;
    padding: clamp(2rem, 5vw, 3.5rem) 0;
    border-top: 1px solid rgba(38, 33, 26, 0.12);
    border-bottom: 1px solid rgba(38, 33, 26, 0.12);
}

.gallery-row .container {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
}

.gallery-row .gallery-link {
    display: block;
    cursor: zoom-in;
    width: min(100%, 820px);
}

.gallery-row img {
    width: 100%;
    height: auto;
    display: block;
    margin: 0;
    border: 0;
    border-radius: 0;
    outline: 0;
    box-shadow: 0 10px 24px rgba(45, 29, 16, 0.22);
    background: transparent;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.gallery-row img:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 30px rgba(45, 29, 16, 0.28);
}

#gallery .gallery-row[class*="era-bg-"] {
    background-image:
        linear-gradient(180deg, rgba(246, 236, 216, 0.82), rgba(239, 227, 199, 0.78)),
        var(--gallery-bg);
}

#gallery .gallery-row.era-bg-05 { --gallery-bg: url("../assets/bg/bg-era-05-rekord-gramophone.png"); background-position: left center; }
#gallery .gallery-row.era-bg-06 { --gallery-bg: url("../assets/bg/bg-era-06-elektronika-cassettes.png"); }
#gallery .gallery-row.era-bg-07 { --gallery-bg: url("../assets/bg/bg-era-07-avoska-queue.png"); background-position: center bottom; }
#gallery .gallery-row.era-bg-08 { --gallery-bg: url("../assets/bg/bg-era-08-school-uniform.png"); background-position: right center; }
#gallery .gallery-row.era-bg-09 { --gallery-bg: url("../assets/bg/bg-era-09-cooperative-kiosk.png"); background-position: right center; }
#gallery .gallery-row.era-bg-10 { --gallery-bg: url("../assets/bg/bg-era-10-iron-laundry.png"); }
#gallery .gallery-row.era-bg-11 { --gallery-bg: url("../assets/bg/bg-epochs-ussr.png"); }
#gallery .gallery-row.era-bg-12 { --gallery-bg: url("../assets/bg/bg-soviet-household.png"); background-position: right center; }
#gallery .gallery-row.era-bg-13 { --gallery-bg: url("../assets/bg/bg-era-13-newyear-home.png"); }

#gallery {
    padding-bottom: 0;
}

#gallery > .container {
    padding-bottom: 1.5rem;
}

.site-footer > .container {
    position: relative;
    z-index: 1;
}

.hero {
    padding: clamp(2.5rem, 6vw, 4.5rem) 0 clamp(2.5rem, 5vw, 4rem);
    position: relative;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        repeating-linear-gradient(
            90deg,
            rgba(130, 95, 52, 0.06) 0,
            rgba(130, 95, 52, 0.06) 1px,
            transparent 1px,
            transparent 42px
        );
    pointer-events: none;
}

.hero__layout {
    display: flex;
    flex-direction: column;
    gap: clamp(1.5rem, 4vw, 2.5rem);
}

.hero__intro {
    text-align: center;
}

.hero__emblem {
    width: min(100%, 660px);
    height: auto;
    margin: 0 auto 0.75rem;
    object-fit: contain;
    filter: drop-shadow(0 20px 28px rgba(57, 38, 23, 0.28));
}

.hero__school {
    margin: 0;
    font-size: clamp(1.1rem, 2.2vw, 1.45rem);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: #5b4a36;
    font-weight: 700;
}

.hero__intro h1 {
    margin-top: 0.55rem;
    font-size: clamp(2.4rem, 6.5vw, 4.5rem);
    color: #132f53;
    text-shadow: 1px 1px 0 rgba(255, 235, 193, 0.7);
}

.hero__stamp {
    margin: 0.55rem 0 0;
    font-family: "PT Serif", Georgia, serif;
    font-size: 1rem;
    color: #4f3f2a;
    font-style: italic;
}

.hero__body {
    max-width: 72ch;
    margin-inline: auto;
    width: 100%;
}

.hero__rail {
    margin: 0;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    font-size: 0.76rem;
    color: #3e3327;
    font-weight: 700;
}

h1,
h2,
h3,
h4 {
    font-family: "Oswald", "Arial Narrow", sans-serif;
    line-height: 1.03;
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.hero h1 {
    margin-top: 0.55rem;
}

.hero__lead {
    margin: 1rem 0 0;
    font-size: 1.14rem;
    color: var(--muted);
    max-width: 62ch;
}

.hero__actions {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.56rem 0.95rem;
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #f8ead0;
    background: linear-gradient(160deg, #153f6d, #12345c);
    border: 1px solid rgba(13, 37, 65, 0.7);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.hero-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 18px rgba(18, 52, 92, 0.24);
}

.hero-btn--ghost {
    color: #16375f;
    background: rgba(246, 234, 206, 0.85);
    border-color: rgba(22, 55, 95, 0.25);
}

.hero__meta {
    margin-top: 1.25rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.hero__meta-item {
    min-width: 180px;
    padding: 0;
    border: 0;
    background: transparent;
}

.hero__meta-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.11em;
    color: #4f3f2a;
    font-weight: 700;
}

.hero__meta-value {
    display: block;
    margin-top: 0.2rem;
    font-weight: 700;
    color: #112d52;
    font-size: 0.96rem;
}

.hero__quote {
    margin: 1rem 0 0;
    padding-left: 0;
    border-left: 0;
    color: #3b3127;
    font-style: italic;
    font-family: "PT Serif", Georgia, serif;
}

.section {
    padding: clamp(2.5rem, 6vw, 4.8rem) 0;
    position: relative;
}

.section--alt:not([class*="era-bg-"]) {
    background: linear-gradient(180deg, rgba(18, 58, 103, 0.05), rgba(173, 50, 37, 0.08));
}

.section--alt {
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.section-title {
    margin-bottom: 1.35rem;
    position: relative;
    padding-left: 0;
}

.eyebrow {
    margin: 0 0 0.48rem;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.17em;
    color: var(--poster-red);
    font-weight: 700;
}

.section-title h2 {
    font-size: clamp(1.85rem, 4.2vw, 3rem);
    color: #132f53;
    max-width: 26ch;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.8rem;
}

.content-grid--editorial {
    align-items: start;
}

.panel {
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
}

.panel p {
    margin: 0 0 1rem;
    font-size: 1.08rem;
    max-width: 44ch;
}

.panel p:last-child {
    margin-bottom: 0;
}

.program-text {
    max-width: 96ch;
    columns: 2;
    column-gap: 2rem;
}

.program-text p {
    margin: 0 0 1rem;
    font-size: 1.08rem;
    break-inside: avoid;
}

.program-text p:last-child {
    margin-bottom: 0;
}

.program-banner {
    margin-top: 1.5rem;
    padding: 0.9rem 0;
    border-top: 2px solid rgba(158, 43, 31, 0.45);
    border-bottom: 2px solid rgba(158, 43, 31, 0.45);
    background: transparent;
    color: #7a1e17;
    font-family: "PT Serif", Georgia, serif;
    font-style: italic;
    letter-spacing: 0.02em;
    font-size: 1.05rem;
    line-height: 1.5;
    text-align: center;
}

.cards-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.9rem;
}

.list-card {
    background: transparent;
    border: 0;
    border-radius: 0;
    padding: 0;
}

.list-card h3 {
    font-size: clamp(1.45rem, 2.2vw, 1.9rem);
    color: #132f53;
    margin-bottom: 0.75rem;
    padding-bottom: 0.45rem;
    border-bottom: 2px solid rgba(19, 47, 83, 0.25);
}

.list-card ul {
    margin: 0;
    padding-left: 1.15rem;
    font-size: 1.05rem;
    columns: 1;
}

.list-card li {
    margin-bottom: 0.5rem;
}

.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(12, 8, 6, 0.88);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    z-index: 200;
}

.lightbox.is-open {
    display: flex;
}

.lightbox__image {
    max-width: min(1200px, 95vw);
    max-height: 88vh;
    width: auto;
    height: auto;
    border-radius: 0;
    border: 0;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.55);
}

.lightbox__close {
    position: absolute;
    top: 0.7rem;
    right: 0.9rem;
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
    font-size: 1.55rem;
    line-height: 1;
    cursor: pointer;
}

.docs-grid {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.doc-link {
    display: inline-block;
    width: fit-content;
    color: #112f53;
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 0.22em;
    text-decoration-thickness: 2px;
}

.doc-link:hover {
    color: var(--poster-red);
}

.cta-band:not([class*="era-bg-"]) {
    background: linear-gradient(90deg, #0f2f53, #123a67 58%, #9e2b1f 100%);
}

.cta-band {
    padding: 2.5rem 0;
    color: #f9f0da;
    position: relative;
    overflow: hidden;
}

.cta-band::after {
    content: "";
    position: absolute;
    right: -60px;
    bottom: -50px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    border: 2px dashed rgba(248, 236, 212, 0.2);
}

.cta-band .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.2rem;
}

.cta-band h2 {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.cta-band p {
    margin: 0.5rem 0 0;
    max-width: 56ch;
}

.cta-band__actions {
    flex-shrink: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 0.72rem 1.2rem;
    font-weight: 700;
    font-size: 0.95rem;
    border: 1px solid transparent;
}

.btn--primary {
    background: #e3bf7b;
    color: #2d1a08;
    border: 1px solid #6f4f1f;
    box-shadow: inset 0 -3px 0 rgba(111, 79, 31, 0.35);
}

.site-footer {
    background: linear-gradient(180deg, #0e2d4d, #0a213a);
    color: rgba(255, 244, 224, 0.92);
    position: relative;
}

.site-footer.era-bg-07 {
    background-image:
        linear-gradient(180deg, rgba(14, 45, 77, 0.93), rgba(10, 33, 58, 0.95)),
        url("../assets/bg/bg-era-07-avoska-queue.png");
    background-size: cover;
    background-position: center;
}

.era-tag--footer {
    grid-column: 1 / -1;
    margin-bottom: 0.2rem;
}

.footer-grid {
    padding: 2.2rem 0 1.8rem;
    display: grid;
    gap: 1rem;
    grid-template-columns: 1.5fr 1fr 1.1fr;
}

.site-footer h4 {
    font-size: 1.34rem;
    color: #ffefce;
    margin-bottom: 0.65rem;
}

.site-footer p {
    margin: 0 0 0.45rem;
    font-size: 0.95rem;
}

.footer-nav a {
    display: block;
    margin-bottom: 0.45rem;
    color: rgba(255, 244, 224, 0.92);
}

.footer-nav a:hover,
.site-footer a:hover {
    color: #ffd792;
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid rgba(191, 147, 71, 0.35);
    padding: 0.9rem 1rem;
    font-size: 0.9rem;
    color: rgba(255, 244, 224, 0.8);
}

@media (max-width: 980px) {
    .content-grid,
    .cards-2,
    .docs-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .hero__emblem {
        width: min(100%, 480px);
    }

    .program-text {
        columns: 1;
    }

    .cta-band .container {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 600px) {
    html {
        font-size: 118.75%;
    }

    .container {
        width: min(1160px, calc(100% - 1.2rem));
    }
}