/* ========================================
   お知らせページ
======================================== */

.information-page {
    position: relative;
    min-height: 100vh;
    padding-top: 120px;
    overflow: hidden;
    background:
        radial-gradient(circle at 50% 0%,
            rgba(0, 217, 255, 0.08),
            transparent 35%),
        #030609;
    color: #ffffff;
}


/* ========================================
   ページタイトル
======================================== */

.information-hero {
    position: relative;
    padding: 90px 20px 55px;
    text-align: center;
}

.information-hero::before {
    content: "";
    position: absolute;
    top: 35px;
    left: 50%;
    width: 360px;
    height: 180px;
    background: rgba(0, 217, 255, 0.08);
    filter: blur(90px);
    transform: translateX(-50%);
    pointer-events: none;
}

.information-hero .section-heading {
    position: relative;
    z-index: 1;
}

.information-hero .section-heading-en {
    margin: 0 0 10px;
    color: #00dcff;
    font-family: "Orbitron", sans-serif;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.25em;
}

.information-hero .section-heading-ja {
    margin: 0;
    color: #ffffff;
    font-size: 38px;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.information-introduction {
    position: relative;
    z-index: 1;
    margin: 25px auto 0;
    color: #bdcbd2;
    font-size: 15px;
    line-height: 2;
}

.sp-only {
    display: none;
}


/* ========================================
   お知らせ一覧
======================================== */

.information-content {
    padding: 0 20px 120px;
}

.information-content .section-inner {
    width: min(100%, 1050px);
    margin: 0 auto;
}


/* ========================================
   絞り込みボタン
======================================== */

.news-filter {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 45px;
}

.news-filter-button {
    min-width: 120px;
    padding: 12px 22px;
    border: 1px solid rgba(0, 220, 255, 0.35);
    border-radius: 999px;
    background: rgba(7, 18, 24, 0.9);
    color: #b8c7ce;
    font-family: "M PLUS Rounded 1c", sans-serif;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition:
        color 0.3s ease,
        border-color 0.3s ease,
        background-color 0.3s ease,
        box-shadow 0.3s ease,
        transform 0.3s ease;
}

.news-filter-button:hover {
    color: #ffffff;
    border-color: #00dcff;
    box-shadow:
        0 0 10px rgba(0, 220, 255, 0.3),
        inset 0 0 10px rgba(0, 220, 255, 0.08);
    transform: translateY(-2px);
}

.news-filter-button.is-active {
    border-color: #00dcff;
    background: #00dcff;
    color: #001117;
    box-shadow:
        0 0 12px rgba(0, 220, 255, 0.45),
        0 0 30px rgba(0, 220, 255, 0.18);
}


/* ========================================
   お知らせカード
======================================== */

.news-list {
    display: grid;
    gap: 24px;
}

.news-card {
    position: relative;
    padding: 32px 36px;
    overflow: hidden;
    border: 1px solid rgba(0, 220, 255, 0.22);
    border-radius: 18px;
    background:
        linear-gradient(135deg,
            rgba(11, 24, 31, 0.98),
            rgba(4, 11, 15, 0.98));
    box-shadow:
        0 15px 35px rgba(0, 0, 0, 0.25),
        inset 0 0 25px rgba(0, 220, 255, 0.025);
    transition:
        border-color 0.3s ease,
        box-shadow 0.3s ease,
        transform 0.3s ease;
}

.news-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: #00dcff;
    opacity: 0.85;
}

.news-card[data-news-type="event"]::before {
    background: #ffe600;
}

.news-card[data-news-type="tiktok"]::before {
    background:
        linear-gradient(to bottom,
            #25f4ee,
            #fe2c55);
}

.news-card:hover {
    border-color: rgba(0, 220, 255, 0.55);
    box-shadow:
        0 18px 45px rgba(0, 0, 0, 0.35),
        0 0 25px rgba(0, 220, 255, 0.08);
    transform: translateY(-3px);
}


/* ========================================
   日付・カテゴリー
======================================== */

.news-card-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 17px;
}

.news-card-meta time {
    color: #94a8b1;
    font-family: "Orbitron", sans-serif;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
}

.news-card-category {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 92px;
    padding: 5px 12px;
    border: 1px solid rgba(0, 220, 255, 0.55);
    border-radius: 999px;
    color: #00dcff;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.05em;
}

.news-card-category-event {
    border-color: rgba(255, 230, 0, 0.65);
    color: #ffe600;
}

.news-card-category-tiktok {
    border-color: rgba(37, 244, 238, 0.7);
    color: #25f4ee;
}


/* ========================================
   タイトル・説明
======================================== */

.news-card-title {
    margin: 0 0 13px;
    color: #ffffff;
    font-size: 21px;
    font-weight: 800;
    line-height: 1.65;
    letter-spacing: 0.03em;
}

.news-card-summary {
    margin: 0;
    color: #bdcbd2;
    font-size: 14px;
    line-height: 1.9;
}


/* ========================================
   お知らせ画像
======================================== */

.news-card-image {
    display: block;
    width: 100%;
    max-height: 520px;
    margin-top: 25px;
    border: 1px solid rgba(0, 220, 255, 0.2);
    border-radius: 12px;
    object-fit: cover;
}


/* ========================================
   詳しく見る
======================================== */

.news-card-details {
    margin-top: 25px;
    border-top: 1px solid rgba(0, 220, 255, 0.16);
}

.news-card-details summary {
    position: relative;
    padding: 20px 42px 3px 0;
    color: #00dcff;
    font-size: 14px;
    font-weight: 800;
    list-style: none;
    cursor: pointer;
}

.news-card-details summary::-webkit-details-marker {
    display: none;
}

.news-card-details summary::after {
    content: "＋";
    position: absolute;
    top: 16px;
    right: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 1px solid rgba(0, 220, 255, 0.45);
    border-radius: 50%;
    color: #00dcff;
    font-size: 18px;
    line-height: 1;
    transition: transform 0.3s ease;
}

.news-card-details[open] summary::after {
    content: "−";
    transform: rotate(180deg);
}

.news-card-details-body {
    padding: 22px 0 5px;
}

.news-card-details-body p {
    margin: 0 0 14px;
    color: #bdcbd2;
    font-size: 14px;
    line-height: 1.9;
}


/* ========================================
   詳細・TikTokリンク
======================================== */

.news-card-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-top: 22px;
    padding: 11px 20px;
    border: 1px solid #00dcff;
    border-radius: 999px;
    color: #00dcff;
    font-size: 13px;
    font-weight: 800;
    text-decoration: none;
    transition:
        color 0.3s ease,
        background-color 0.3s ease,
        box-shadow 0.3s ease;
}

.news-card-link:hover {
    background: #00dcff;
    color: #001117;
    box-shadow: 0 0 20px rgba(0, 220, 255, 0.3);
}


/* ========================================
   読み込みメッセージ
======================================== */

.news-message {
    margin: 35px 0 0;
    color: #91a5ae;
    font-size: 14px;
    text-align: center;
}


/* ========================================
   TOPへ戻るボタン
======================================== */

.information-content .section-button-area {
    display: flex;
    justify-content: center;
    margin-top: 60px;
}

.information-content .section-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 22px;
    min-width: 230px;
    padding: 15px 25px;
    border: 1px solid #00dcff;
    border-radius: 999px;
    background: rgba(0, 220, 255, 0.04);
    color: #ffffff;
    font-family: "Orbitron", "M PLUS Rounded 1c", sans-serif;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-decoration: none;
    transition:
        color 0.3s ease,
        background-color 0.3s ease,
        box-shadow 0.3s ease,
        transform 0.3s ease;
}

.information-content .section-button:hover {
    background: #00dcff;
    color: #001117;
    box-shadow: 0 0 25px rgba(0, 220, 255, 0.35);
    transform: translateY(-2px);
}

/* ========================================
   過去のイベント一覧
======================================== */

.past-events-list {
    display: grid;
    gap: 55px;
}

.past-events-year {
    position: relative;
}

.past-events-year-title {
    position: relative;
    margin: 0 0 24px;
    padding-left: 18px;
    color: #ffffff;
    font-family: "Orbitron", "M PLUS Rounded 1c", sans-serif;
    font-size: 28px;
    font-weight: 800;
    letter-spacing: 0.06em;
}

.past-events-year-title::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    width: 4px;
    height: 28px;
    border-radius: 999px;
    background: #00dcff;
    box-shadow: 0 0 14px rgba(0, 220, 255, 0.7);
    transform: translateY(-50%);
}

.past-events-year-list {
    display: grid;
    gap: 14px;
}

.past-event-card {
    position: relative;
    display: grid;
    grid-template-columns: 130px 1fr 40px;
    align-items: center;
    gap: 24px;
    padding: 24px 28px;
    overflow: hidden;
    border: 1px solid rgba(0, 220, 255, 0.24);
    border-radius: 16px;
    background:
        linear-gradient(135deg,
            rgba(11, 24, 31, 0.98),
            rgba(4, 11, 15, 0.98));
    color: #ffffff;
    text-decoration: none;
    box-shadow:
        0 14px 35px rgba(0, 0, 0, 0.25),
        inset 0 0 24px rgba(0, 220, 255, 0.025);
    transition:
        border-color 0.3s ease,
        box-shadow 0.3s ease,
        transform 0.3s ease;
}

.past-event-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: #ffe600;
}

.past-event-card:hover {
    border-color: rgba(0, 220, 255, 0.6);
    box-shadow:
        0 18px 45px rgba(0, 0, 0, 0.35),
        0 0 25px rgba(0, 220, 255, 0.1);
    transform: translateY(-3px);
}

.past-event-date {
    color: #00dcff;
    font-family: "Orbitron", "M PLUS Rounded 1c", sans-serif;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.past-event-title {
    color: #ffffff;
    font-size: 17px;
    font-weight: 800;
    line-height: 1.6;
}

.past-event-arrow {
    color: #ffe600;
    font-family: "Orbitron", sans-serif;
    font-size: 20px;
    font-weight: 700;
    text-align: right;
    transition: transform 0.3s ease;
}

.past-event-card:hover .past-event-arrow {
    transform: translateX(5px);
}