/* クレジットページとエンドロール演出 */

.vkc-credits {
    --vkc-credits-bg: #05070d;
    --vkc-credits-fg: #f2f4f8;
    --vkc-credits-muted: #8e9bb3;
    --vkc-credits-accent: #6fa8ff;

    margin: 1.5rem 0;
    padding: 3rem 1rem;
    border-radius: 0.6rem;
    background:
        radial-gradient(ellipse at 50% 0%, rgba(0, 82, 170, 0.35), transparent 70%),
        var(--vkc-credits-bg);
    color: var(--vkc-credits-fg);
    text-align: center;
}

.md-typeset .vkc-credits p,
.md-typeset .vkc-credits ul {
    margin: 0;
}

.vkc-credits__opening {
    margin-bottom: 3.5rem;
}

.md-typeset .vkc-credits__kicker {
    color: var(--vkc-credits-muted);
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
}

.md-typeset .vkc-credits__title {
    margin-top: 0.4rem;
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.vkc-credits__group + .vkc-credits__group {
    margin-top: 3rem;
}

.md-typeset .vkc-credits .vkc-credits__team {
    margin: 0 0 1.2rem;
    color: var(--vkc-credits-accent);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.25em;
}

.md-typeset .vkc-credits .vkc-credits__role {
    margin: 1.4rem 0 0.5rem;
    color: var(--vkc-credits-muted);
    font-size: 0.65rem;
    font-weight: 400;
    letter-spacing: 0.2em;
}

.md-typeset .vkc-credits .vkc-credits__names {
    padding: 0;
    list-style: none;
}

.md-typeset .vkc-credits .vkc-credits__names li {
    margin: 0.35rem 0;
    font-size: 0.95rem;
}

.md-typeset .vkc-credits a {
    color: inherit;
    text-decoration: underline;
    text-decoration-color: rgba(255, 255, 255, 0.3);
    text-underline-offset: 0.2em;
}

.md-typeset .vkc-credits a:hover {
    color: var(--vkc-credits-accent);
}

.vkc-credits__finale {
    margin-top: 4.5rem;
}

.md-typeset .vkc-credits__logo {
    width: 9rem;
    max-width: 60%;
}

.md-typeset .vkc-credits__thanks {
    margin-top: 1.2rem;
    font-size: 0.85rem;
    letter-spacing: 0.08em;
}

.md-typeset .vkc-credits__copyright {
    margin-top: 0.4rem;
    color: var(--vkc-credits-muted);
    font-size: 0.6rem;
}

.md-typeset .vkc-credits__play-wrap {
    text-align: center;
}

/* ---- エンドロール (全画面) ---- */

.vkc-endroll-open,
.vkc-endroll-open body {
    overflow: hidden;
}

.vkc-endroll {
    position: fixed;
    inset: 0;
    z-index: 10000;
    overflow: hidden;
    background: #000;
    opacity: 0;
    transition: opacity 0.4s ease;
    cursor: pointer;
}

.vkc-endroll.is-visible {
    opacity: 1;
}

/* 上下の端をフェードさせる */
.vkc-endroll::before,
.vkc-endroll::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    z-index: 2;
    height: 18vh;
    pointer-events: none;
}

.vkc-endroll::before {
    top: 0;
    background: linear-gradient(#000, transparent);
}

.vkc-endroll::after {
    bottom: 0;
    background: linear-gradient(transparent, #000);
}

.vkc-endroll__track {
    position: relative;
    z-index: 1;
    will-change: transform;
    transform: translateY(100vh);
}

/* Three.js の背景 */
.vkc-endroll__canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.5s ease;
}

.vkc-endroll__canvas.is-visible {
    opacity: 1;
}

.vkc-endroll .vkc-credits__kicker,
.vkc-endroll .vkc-credits__title,
.vkc-endroll .vkc-credits__team,
.vkc-endroll .vkc-credits__role,
.vkc-endroll .vkc-credits__names li,
.vkc-endroll .vkc-credits__logo {
    will-change: transform;
}

.vkc-endroll .vkc-credits--roll .vkc-credits__title {
    text-shadow: 0 0 24px rgba(111, 168, 255, 0.8), 0 0 60px rgba(111, 168, 255, 0.35);
}

.vkc-endroll .vkc-credits--roll .vkc-credits__names li {
    text-shadow: 0 0 12px rgba(0, 0, 0, 0.9), 0 0 18px rgba(111, 168, 255, 0.35);
}

/* チーム名はカメレオンのように色が移り変わる */
.md-typeset .vkc-endroll .vkc-credits .vkc-credits__team {
    display: inline-block;
    background: linear-gradient(90deg, #6fa8ff, #b388ff, #ff80ab, #ffd180, #69f0ae, #6fa8ff);
    background-size: 300% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-size: 1rem;
    animation: vkc-chameleon 6s linear infinite;
}

@keyframes vkc-chameleon {
    to { background-position: 300% 0; }
}

.vkc-endroll.is-finished .vkc-credits__logo {
    animation: vkc-logo-glow 3s ease-in-out infinite;
}

@keyframes vkc-logo-glow {
    0%, 100% { filter: drop-shadow(0 0 8px rgba(111, 168, 255, 0.6)); }
    50% { filter: drop-shadow(0 0 24px rgba(179, 136, 255, 0.9)); }
}

.vkc-endroll .vkc-credits--roll {
    max-width: 40rem;
    margin: 0 auto;
    padding: 0 1rem;
    border-radius: 0;
    background: transparent;
    font-size: 1rem;
}

.vkc-endroll .vkc-credits--roll .vkc-credits__opening {
    margin-bottom: 40vh;
}

.vkc-endroll .vkc-credits--roll .vkc-credits__title {
    font-size: 2.2rem;
}

.vkc-endroll .vkc-credits--roll .vkc-credits__group + .vkc-credits__group {
    margin-top: 25vh;
}

.vkc-endroll .vkc-credits--roll .vkc-credits__names li {
    margin: 0.6rem 0;
    font-size: 1.15rem;
}

.vkc-endroll .vkc-credits--roll .vkc-credits__finale {
    margin-top: 45vh;
}

.vkc-endroll .vkc-credits--roll .vkc-credits__logo {
    width: 12rem;
}

.vkc-endroll .vkc-credits__thanks,
.vkc-endroll .vkc-credits__copyright {
    text-shadow: 0 0 6px #000, 0 0 14px #000, 0 0 24px rgba(0, 0, 0, 0.8);
    opacity: 0;
    transition: opacity 1.2s ease 0.3s;
}

.vkc-endroll.is-finished .vkc-credits__thanks,
.vkc-endroll.is-finished .vkc-credits__copyright,
.vkc-endroll.is-static .vkc-credits__thanks,
.vkc-endroll.is-static .vkc-credits__copyright {
    opacity: 1;
}

/* 動きを減らす設定のときはスクロールせず、そのまま読めるようにする */
.vkc-endroll.is-static {
    overflow-y: auto;
}

.vkc-endroll.is-static .vkc-endroll__track {
    transform: none;
    padding: 12vh 0;
}

.vkc-endroll__close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 3;
    padding: 0.3rem 0.7rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 0.3rem;
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    font: inherit;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    cursor: pointer;
}

.vkc-endroll__close:hover,
.vkc-endroll__close:focus-visible {
    color: #fff;
    border-color: #fff;
}

/* フッターのクレジットリンク */
.md-footer-credits {
    display: inline-block;
    margin-top: 0.2rem;
    color: var(--md-footer-fg-color--lighter);
    font-size: 0.64rem;
}

.md-footer-credits:hover {
    color: var(--md-footer-fg-color);
}