:root {
    --bg-main: #7dded9;
    --bg-sub: #dff7f4;
    --content-max: 1200px;
    --section-gap-sp: 24px;
    --section-gap-pc: 45px;
    --header-bg: rgba(255, 255, 255, 0.78);
    --header-text: #1f2f37;
    --header-border: rgba(31, 47, 55, 0.14);
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    font-family: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
    background: linear-gradient(180deg, var(--bg-main) 0%, var(--bg-sub) 100%);
}

html {
    scroll-behavior: smooth;
}

header {
    position: sticky;
    top: 0;
    z-index: 20;
    padding: 10px 12px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--header-border);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.txt-center {
    text-align: center;
}

.header-inner {
    width: min(100%, var(--content-max));
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.menu-toggle {
    width: 44px;
    height: 44px;
    margin-left: 0;
    padding: 0;
    border: none;
    border-radius: 10px;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.78);
}

.header-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: min(40vw, 180px);
    margin-left: 12px;
    background: transparent;
}

.header-logo img {
    display: block;
    width: 100%;
    height: auto;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 0 auto;
    background: var(--header-text);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

header nav {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: 0;
    padding: 10px;
    border: 1px solid var(--header-border);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.95);
}

header.is-open nav {
    display: block;
}

header.is-open .menu-toggle span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

header.is-open .menu-toggle span:nth-child(2) {
    opacity: 0;
}

header.is-open .menu-toggle span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

header ul {
    width: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    overflow-x: visible;
    scrollbar-width: thin;
}

header li {
    width: 100%;
}

header a {
    display: block;
    padding: 8px 5px;
    border: none;
    border-radius: 10px;
    color: var(--header-text);
    font-size: 14px;
    font-weight: 900;
    letter-spacing: 0.08em;
    line-height: 1;
    text-decoration: none;
    background: rgba(255, 255, 255, 0.66);
    white-space: nowrap;
    transition: background-color 0.25s ease, color 0.25s ease;
}

header a:hover,
header a:focus-visible,
header a.is-active {
    color: #ffffff;
    background: #21b6c4;
}

[data-nav-target] {
    scroll-margin-top: 84px;
}

.page-main {
    width: 100%;
    min-height: 100vh;
}

.main-wrapper {
    width: min(100%, var(--content-max));
    margin: 0 auto;
    padding: 0 16px 40px;
}

.section-hero {
    padding-top: 16px;
    margin-bottom: 40px;
}

.section-hero img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 12px;
}

.section-stack {
    display: grid;
    gap: var(--section-gap-sp);
    margin-top: var(--section-gap-sp);
}

.content-section {
    min-height: 30vh;
    min-width: 0;
    padding: 28px 12px;
    border-radius: 16px;
    border: 1px solid rgba(31, 47, 55, 0.12);
    background: rgba(255, 255, 255, 0.72);
}

.content-section-no-bg {
    border-radius: 0;
    border: none;
    background: transparent;
}

.content-section-inner {
    min-height: 48vh;
    min-width: 0;
    padding: 30px 18px;
    border-radius: 16px;
    border: 1px solid rgba(31, 47, 55, 0.12);
    background: rgba(255, 255, 255, 0.72);
    margin: 24px 0;
}

.content-section-inner .event-image {
    text-align: center;
    margin: 0 auto;
    filter: drop-shadow(0 4px 8px rgba(31, 47, 55, 0.12));
}

.content-section-inner .event-image img {
    display: block;
    width: min(100%, 600px);
    height: auto;
    margin: 0 auto;
    border-radius: 12px;
}

.content-section-inner .event-text {
    text-align: left;
    width: min(100%, 30em);
    margin: 26px auto 40px;
    font-size: clamp(12px, 3.5vw, 16px);
    line-height: 1.5;
}

.content-section h2 {
    position: relative;
    display: table;
    margin: 0 auto;
    padding: 0.42em 0.95em 0.5em;
    font-size: clamp(20px, 6.5vw, 34px);
    line-height: 1.1;
    color: #114955;
    text-shadow: 0 1px 0 rgba(255, 255, 255, 0.7);
    letter-spacing: 0.04em;
    text-align: center;
    border: 1px solid rgba(17, 73, 85, 0.2);
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(224, 247, 244, 0.92));
    box-shadow: 0 10px 24px rgba(17, 73, 85, 0.12), inset 0 -2px 0 rgba(17, 73, 85, 0.1);
}

.content-section h2::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -12px;
    width: 56%;
    height: 4px;
    transform: translateX(-50%);
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(33, 182, 196, 0.18), rgba(33, 182, 196, 0.7), rgba(33, 182, 196, 0.18));
}

.content-section h3 {
    margin: 4svh;
    font-size: clamp(18px, 4.5vw, 30px);
    line-height: 1.1;
    letter-spacing: 0.04em;
    text-align: center;
}

.content-section h3.place {
    font-family: "League Spartan", "Arial Black", "Helvetica Neue", sans-serif;
    font-size: clamp(18px, 5.5vw, 40px);
    font-weight: 800;
    letter-spacing: 0.06em;
    line-height: 1.05;
    text-transform: uppercase;
    text-align: left;
    margin: 30px 0;
}

.content-section h3.highlight {
    font-family: "League Spartan", "Arial Black", "Helvetica Neue", sans-serif;
    font-size: clamp(18px, 5.5vw, 40px);
    font-weight: 800;
    letter-spacing: 0.06em;
    line-height: 1.05;
    text-transform: uppercase;
    text-align: center;
    margin: 100px auto;
}

.content-section h3.subtitle {
    margin: 5svh auto;
    font-size: clamp(18px, 4.5vw, 30px);
    line-height: 1.1;
    letter-spacing: 0.04em;
    text-align: center;
}

.content-section h4 {
    margin: 5svh auto;
    font-size: clamp(14px, 3.5vw, 20px);
    line-height: 1.1;
    letter-spacing: 0.04em;
    text-align: left;
    width: min(100%, 30em);
}

.content-section p {
    margin: 30px 0 0;
    font-size: clamp(12px, 3.8vw, 18px);
    line-height: 1.85;
}

#linkbnr {
    width: min(100%, 700px);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 22px;
}

#linkbnr a {
    display: block;
    width: 75%;
    margin: 0 auto;
    padding: 8px 10px;
    border: 2px solid rgba(31, 47, 55, 0.24);
    border-radius: 24px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.9);
    transition: background-color 0.24s ease, border-color 0.24s ease;
}

#linkbnr a img {
    display: block;
    width: 100%;
    height: auto;
    transition: filter 0.24s ease;
}

#linkbnr a:hover,
#linkbnr a:focus-visible {
    border-color: #0f3e48;
    background: #0f3e48;
}

#linkbnr a:hover img,
#linkbnr a:focus-visible img {
    filter: invert(1) hue-rotate(180deg);
}

#stickers .main-image {
    text-align: center;
    margin: 3svh auto;
    filter: drop-shadow(0 4px 8px rgba(31, 47, 55, 0.12));
}

#stickers h3 {
    text-align: center;
    font-size: clamp(18px, 2vw, 26px);
}

#stickers .sticker-image {
    width: min(100%, 280px);
    margin: 45px auto 0;
    padding: 0;
    border-radius: 0;
    background: transparent;
}

#stickers .sticker-image img {
    display: block;
    width: 100%;
    height: auto;
    margin: 8% 0;
    opacity: 1;
    transition: opacity 0.28s ease;
    will-change: opacity;
}

#stickers .sticker-image img.is-fading {
    opacity: 0;
}

#stickers .sticker-gallary {
    width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-top: 20px;
    padding: 0 16px;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    touch-action: pan-x;
}

#stickers .sticker-gallary::-webkit-scrollbar {
    display: none;
}

#stickers .sticker-gallery-list {
    display: flex;
    align-items: center;
    gap: 10px;
    width: max-content;
    margin: 0;
    padding: 6px 2px;
    list-style: none;
}

#stickers .sticker-gallery-list li {
    flex: 0 0 auto;
}

#stickers .sticker-thumb {
    display: block;
    width: 96px;
    padding: 0;
    border: 2px solid transparent;
    border-radius: 10px;
    background: transparent;
    cursor: pointer;
}

#stickers .sticker-thumb img {
    display: block;
    width: 100%;
    height: auto;
}

#stickers .sticker-thumb.is-active {
    border-color: #21b6c4;
}

#stickers .sticker-thumb:focus-visible {
    outline: 2px solid #21b6c4;
    outline-offset: 2px;
}

#stickers .sticker_slider {
    position: relative;
    width: min(100%, 100%);
    max-width: 100%;
    margin: 32px auto 0;
}

#stickers .sticker_frame {
    overflow: hidden;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.5);
    box-shadow: 0 16px 32px rgba(17, 73, 85, 0.08);
}

#stickers .sticker_list {
    display: flex;
    width: 100%;
    margin: 0;
    padding: 0;
    list-style: none;
    transition: transform 0.5s ease;
}

#stickers .sticker_item {
    display: flex;
    flex: 0 0 100%;
    align-items: center;
    /*gap: clamp(16px, 2.8vw, 28px);*/
    padding: clamp(18px, 3vw, 28px);
    box-sizing: border-box;
    background: #f3f7f8;
}

#stickers .sticker_item .image {
    flex: 0 0 42%;
    max-width: 42%;
}

#stickers .sticker_item .image img {
    display: block;
    width: 100%;
    height: auto;
    max-height: 520px;
    margin: 0 auto;
    object-fit: contain;
    background: #f3f7f8;
}

#stickers .sticker_item .text {
    flex: 0 0 58%;
    max-width: 58%;
    min-width: 0;
}

#stickers .sticker_item .text h3 {
    margin: 0 0 18px;
    padding-top: 6px;
    color: #114955;
    font-size: clamp(18px, 2vw, 26px);
    line-height: 1.35;
    letter-spacing: 0.04em;
    text-align: left;
}

#stickers .sticker_item .text p {
    margin: 0;
    padding-top: 6px;
    color: #1f2f37;
    font-size: clamp(12px, 1.8vw, 16px);
    line-height: 1.8;
    text-align: left;
}

#stickers .sticker_nav {
    position: absolute;
    top: 50%;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(17, 73, 85, 0.2);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    color: #114955;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    transform: translateY(-50%);
    box-shadow: 0 8px 18px rgba(17, 73, 85, 0.12);
    transition: background-color 0.2s ease, transform 0.2s ease;
}

#stickers .sticker_nav:hover,
#stickers .sticker_nav:focus-visible {
    background: #114955;
    color: #fff;
    outline: none;
}

#stickers .sticker_nav:active {
    transform: translateY(-50%) scale(0.96);
}

#stickers .sticker_nav_prev {
    left: -18px;
}

#stickers .sticker_nav_next {
    right: -18px;
}

@media (max-width: 767px) {
    #stickers .sticker_item {
        flex-direction: column;
        gap: 20px;
        padding: 28px 14px;
    }

    #stickers .sticker_item .image,
    #stickers .sticker_item .text {
        flex-basis: auto;
        width: 100%;
        max-width: 100%;
    }

    #stickers .sticker_item .text h3,
    #stickers .sticker_item .text p {
        text-align: center;
    }

    #stickers .sticker_nav {
        width: 38px;
        height: 38px;
        font-size: 22px;
    }

    #stickers .sticker_nav_prev {
        left: 8px;
    }

    #stickers .sticker_nav_next {
        right: 8px;
    }
}

footer {
    margin-top: 40px;
    padding: 20px 16px 28px;
    border-top: 1px solid rgba(31, 47, 55, 0.16);
    background: rgba(255, 255, 255, 0.45);
}

footer p {
    width: min(100%, var(--content-max));
    margin: 0 auto;
    color: rgba(31, 47, 55, 0.82);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1.5;
    text-align: center;
}

@media (min-width: 768px) {

    br.sp {
        display: none;
    }

    header {
        padding: 14px 24px;
    }

    .menu-toggle {
        display: none;
    }

    .header-logo {
        display: none;
    }

    header nav {
        position: static;
        display: block;
        padding: 0;
        border: none;
        border-radius: 0;
        background: transparent;
    }

    header ul {
        width: min(100%, var(--content-max));
        margin: 0 auto;
        flex-direction: row;
        justify-content: center;
        align-items: center;
        gap: 12px;
        overflow-x: visible;
    }

    header li {
        width: auto;
    }

    header a {
        padding: 12px 18px;
        font-size: 16px;
    }

    [data-nav-target] {
        scroll-margin-top: 98px;
    }

    .main-wrapper {
        padding: 0 24px 56px;
    }

    .section-hero {
        padding-top: 24px;
    }

    .section-stack {
        gap: var(--section-gap-pc);
        margin-top: var(--section-gap-pc);
    }

    .content-section {
        min-height: 52vh;
        padding: 36px 32px;
    }

    .content-section-inner {
        padding: 34px 24px;
        margin: 40px auto;
    }

    .content-section-inner .event-image img {
        width: min(100%, 800px);
    }

    .content-section-inner .event-text {
        width: min(100%, 34em);
        margin-top: 34px;
        font-size: clamp(16px, 1.7vw, 20px);
        line-height: 1.9;
    }

    .content-section h2 {
        font-size: clamp(32px, 4vw, 44px);
        padding: 0.4em 1em 0.5em;
    }

    .content-section h3.place {
        margin: 40px 40px;
    }

    .content-section h3.subtitle {
        margin: 8cqb auto;
    }

    .content-section p {
        margin-top: 42px;
        font-size: 22px;
        line-height: 2;
    }

    #linkbnr {
        flex-direction: row;
        width: min(100%, 640px);
        gap: 34px;
    }

    #linkbnr a {
        flex: 1 1 0;
        padding: 10px 12px;
    }

    #stickers .sticker-image {
        width: min(100%, 400px);
        margin-top: 34px;
        padding: 0;
    }

    #stickers .sticker-gallary {
        margin-top: 26px;
        padding: 0 24px;
    }

    #stickers .sticker-gallery-list {
        gap: 12px;
    }

    #stickers .sticker-thumb {
        width: 124px;
    }

    footer {
        margin-top: 56px;
        padding: 24px 24px 34px;
    }

    footer p {
        font-size: 13px;
        text-align: right;
    }
}