.presenter-page {
    position: relative;
    min-height: 100svh;
    overflow: hidden;
    background-color: #0a2117;
    background-position: center;
    background-size: cover;
    color: #ffffff;
}

.presenter-page::before {
    position: fixed;
    z-index: 0;
    inset: 0;
    content: "";
    background: rgba(3, 18, 12, 0.3);
}

.presenter-page[data-presentation-theme="quiet"] {
    background-color: #285343;
}

.presenter-page[data-presentation-theme="quiet"]::before {
    background: transparent;
}

.presenter-page[data-presentation-theme="immersive"][data-backdrop="1"] {
    background-image: url("../images/background/theme-1.jpg");
}

.presenter-page[data-presentation-theme="immersive"][data-backdrop="2"] {
    background-image: url("../images/background/theme-3.jpg");
}

.presenter-page[data-presentation-theme="immersive"][data-backdrop="3"] {
    background-image: url("../images/background/theme-6.jpg");
}

.presenter-page[data-presentation-theme="immersive"][data-backdrop="4"] {
    background-image: url("../images/background/theme-9.jpg");
}

.presenter-page[data-presentation-theme="immersive"][data-backdrop="5"] {
    background-image: url("../images/background/theme-12.jpg");
}

.presenter-page[data-presentation-theme="immersive"][data-backdrop="6"] {
    background-image: url("../images/background/theme-16.jpg");
}

.presentation-shell {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    width: min(1300px, calc(100% - 48px));
    height: 100svh;
    margin: 0 auto;
    padding: 24px 0;
}

.presenter-header {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr) 48px;
    align-items: center;
    min-height: 48px;
    gap: 16px;
}

.presenter-close,
.presenter-fullscreen,
.presenter-controls button {
    display: inline-grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border: 1px solid rgba(255, 255, 255, 0.35);
    background: rgba(5, 28, 19, 0.42);
    color: #ffffff;
    cursor: pointer;
}

.presenter-close:hover,
.presenter-fullscreen:hover,
.presenter-controls button:hover:not(:disabled) {
    border-color: #b5f35a;
    background: #b5f35a;
    color: #0a2117;
}

.presenter-controls button:disabled {
    cursor: not-allowed;
    opacity: 0.32;
}

.presenter-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    gap: 10px;
    font-size: 14px;
    font-weight: 800;
    text-align: center;
}

.presenter-brand img {
    width: 34px;
    height: 34px;
    object-fit: contain;
}

.presenter-brand span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.presenter-stage {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 0;
    margin: 32px 0;
    min-width: 0;
    padding: 48px 40px;
    overflow: auto;
    background: rgba(4, 25, 17, 0.14);
}

.presenter-count {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 8px 10px;
    color: #ffffff;
    font-size: 12px;
    font-weight: 800;
}

.presenter-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    min-width: 0;
    gap: 20px;
}

.presenter-lyrics {
    width: 100%;
    max-width: 1120px;
    color: #ffffff;
    font-size: 44px;
    font-weight: 800;
    line-height: 1.45;
    text-align: center;
    white-space: pre-line;
    overflow-wrap: anywhere;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.9), 0 0 24px rgba(0, 0, 0, 0.55);
}

.presenter-lyrics.is-changing {
    animation: lyric-enter 180ms ease-out;
}

.presenter-ending-mark {
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    width: 96px;
    height: 96px;
}

.presenter-ending-mark img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.presenter-controls {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.presenter-close,
.presenter-fullscreen,
.presenter-controls,
.presenter-count {
    transition: opacity 180ms ease;
}

.presenter-page.is-idle .presenter-close,
.presenter-page.is-idle .presenter-fullscreen,
.presenter-page.is-idle .presenter-controls,
.presenter-page.is-idle .presenter-count {
    opacity: 0;
    pointer-events: none;
}

.presenter-page.is-idle {
    cursor: none;
}

.presenter-status {
    position: absolute;
    right: 16px;
    bottom: 12px;
    left: 16px;
    margin: 0;
    font-size: 13px;
    text-align: center;
}

@media (prefers-reduced-motion: reduce) {
    .presenter-lyrics.is-changing {
        animation: none;
    }
}

@keyframes lyric-enter {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 900px) {
    .presenter-lyrics {
        font-size: 36px;
    }
}

@media (max-width: 640px) {
    .presentation-shell {
        width: min(100% - 24px, 1300px);
        padding: 12px 0;
    }

    .presenter-header {
        grid-template-columns: 42px minmax(0, 1fr) 42px;
        gap: 8px;
    }

    .presenter-close,
    .presenter-fullscreen,
    .presenter-controls button {
        width: 40px;
        height: 40px;
    }

    .presenter-stage {
        margin: 18px 0;
        padding: 46px 20px;
    }

    .presenter-lyrics {
        font-size: 28px;
        line-height: 1.4;
    }

    .presenter-content {
        gap: 16px;
    }

    .presenter-ending-mark {
        width: 72px;
        height: 72px;
    }

    .presenter-count {
        padding: 6px 8px;
        font-size: 11px;
    }
}

@media (max-height: 480px) {
    .presentation-shell {
        padding: 8px 0;
    }

    .presenter-header {
        min-height: 40px;
    }

    .presenter-close,
    .presenter-fullscreen,
    .presenter-controls button {
        width: 40px;
        height: 40px;
    }

    .presenter-stage {
        margin: 8px 0;
        padding: 28px 24px 12px;
    }

    .presenter-lyrics {
        font-size: 28px;
        line-height: 1.3;
    }

    .presenter-content {
        gap: 12px;
    }

    .presenter-ending-mark {
        width: 56px;
        height: 56px;
    }
}