:root {
    color-scheme: dark;
    --manual-bg: #05070b;
    --manual-surface: rgba(8, 12, 18, 0.78);
    --manual-surface-pressed: rgba(23, 31, 43, 0.92);
    --manual-text: #ffffff;
    --manual-muted: rgba(255, 255, 255, 0.78);
    --manual-accent: #22c55e;
    --manual-border: rgba(255, 255, 255, 0.18);
    --manual-focus: #86efac;
    font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
    margin: 0;
    overflow: hidden;
    background: var(--manual-bg);
}

body {
    overscroll-behavior: none;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible {
    outline: 3px solid var(--manual-focus);
    outline-offset: 2px;
}

.skip-link {
    position: fixed;
    z-index: 100;
    top: 8px;
    left: 8px;
    padding: 12px 16px;
    color: #052e16;
    background: var(--manual-focus);
    border-radius: 8px;
    transform: translateY(-160%);
}

.skip-link:focus {
    transform: translateY(0);
}

.manual-viewer {
    position: relative;
    width: 100vw;
    width: 100dvw;
    height: 100vh;
    height: 100dvh;
    min-height: -webkit-fill-available;
    overflow: hidden;
    background:
        radial-gradient(circle at 50% 50%, rgba(37, 99, 235, 0.08), transparent 50%),
        var(--manual-bg);
    touch-action: pan-y;
    user-select: none;
    -webkit-user-select: none;
    cursor: grab;
}

.manual-viewer.is-dragging {
    cursor: grabbing;
}

.manual-viewer.is-zoomed {
    touch-action: none;
}

.manual-track {
    display: flex;
    height: 100%;
    transform: translate3d(0, 0, 0);
    will-change: transform;
}

.manual-track.is-animating {
    transition: transform 260ms cubic-bezier(0.22, 0.72, 0.2, 1);
}

.manual-slide {
    display: flex;
    flex: 0 0 100vw;
    flex-basis: 100dvw;
    align-items: center;
    justify-content: center;
    width: 100vw;
    width: 100dvw;
    height: 100%;
    overflow: hidden;
}

.manual-image {
    display: block;
    width: auto;
    height: auto;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transform: translate3d(0, 0, 0) scale(1);
    transform-origin: center center;
    will-change: transform;
    pointer-events: none;
    -webkit-user-drag: none;
}

.manual-image.is-animating {
    transition: transform 220ms ease-out;
}

.manual-loading {
    position: absolute;
    z-index: 25;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--manual-muted);
    font-size: 14px;
    background: var(--manual-bg);
    transition: opacity 180ms ease-out, visibility 180ms ease-out;
}

.manual-loading.is-hidden {
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
}

.manual-loading__mark {
    display: grid;
    width: 36px;
    height: 36px;
    place-items: center;
    color: #ffffff;
    font-size: 20px;
    font-weight: 800;
    background: var(--manual-accent);
    border-radius: 10px;
    animation: manual-pulse 1.2s ease-in-out infinite;
}

@keyframes manual-pulse {
    50% { opacity: 0.55; transform: scale(0.94); }
}

.manual-chrome,
.manual-toolbar {
    transition: opacity 180ms ease-out, transform 180ms ease-out;
}

.manual-toolbar {
    position: absolute;
    z-index: 20;
    top: 0;
    left: 0;
    display: grid;
    grid-template-columns: minmax(74px, 1fr) auto minmax(132px, 1fr);
    align-items: center;
    width: 100%;
    padding:
        calc(env(safe-area-inset-top, 0px) + 8px)
        calc(env(safe-area-inset-right, 0px) + 8px)
        28px
        calc(env(safe-area-inset-left, 0px) + 8px);
    background: linear-gradient(to bottom, rgba(5, 7, 11, 0.84), transparent);
}

.manual-home {
    display: inline-flex;
    align-items: center;
    justify-content: flex-start;
    gap: 2px;
    width: fit-content;
    min-width: 68px;
    min-height: 44px;
    padding: 0 12px 0 8px;
    color: var(--manual-text);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    background: var(--manual-surface);
    border: 1px solid var(--manual-border);
    border-radius: 12px;
    backdrop-filter: blur(12px);
}

.manual-home svg,
.manual-nav svg,
.manual-zoom-controls svg {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.manual-counter {
    margin: 0;
    padding: 8px 12px;
    color: var(--manual-text);
    font-size: 14px;
    font-variant-numeric: tabular-nums;
    font-weight: 650;
    text-align: center;
    background: var(--manual-surface);
    border: 1px solid var(--manual-border);
    border-radius: 999px;
    backdrop-filter: blur(12px);
}

.manual-zoom-controls {
    display: flex;
    justify-self: end;
    overflow: hidden;
    background: var(--manual-surface);
    border: 1px solid var(--manual-border);
    border-radius: 12px;
    backdrop-filter: blur(12px);
}

.manual-zoom-controls button {
    display: grid;
    min-width: 44px;
    height: 44px;
    padding: 0;
    place-items: center;
    color: var(--manual-text);
    font: inherit;
    font-size: 12px;
    font-variant-numeric: tabular-nums;
    background: transparent;
    border: 0;
    cursor: pointer;
}

.manual-zoom-controls button + button {
    border-left: 1px solid var(--manual-border);
}

.manual-zoom-controls button:active:not(:disabled),
.manual-home:active,
.manual-nav:active:not(:disabled) {
    background: var(--manual-surface-pressed);
}

.manual-zoom-controls button:disabled,
.manual-nav:disabled {
    opacity: 0.38;
    cursor: default;
}

#manual-zoom-reset {
    min-width: 52px;
}

.manual-nav {
    position: absolute;
    z-index: 18;
    top: 50%;
    display: grid;
    width: 48px;
    height: 56px;
    padding: 0;
    place-items: center;
    color: var(--manual-text);
    background: var(--manual-surface);
    border: 1px solid var(--manual-border);
    border-radius: 14px;
    backdrop-filter: blur(12px);
    cursor: pointer;
}

.manual-nav--previous {
    left: calc(env(safe-area-inset-left, 0px) + 8px);
    transform: translateY(-50%);
}

.manual-nav--next {
    right: calc(env(safe-area-inset-right, 0px) + 8px);
    transform: translateY(-50%);
}

.manual-footer {
    position: absolute;
    z-index: 20;
    right: 0;
    bottom: 0;
    left: 0;
    padding:
        32px
        calc(env(safe-area-inset-right, 0px) + 20px)
        calc(env(safe-area-inset-bottom, 0px) + 14px)
        calc(env(safe-area-inset-left, 0px) + 20px);
    text-align: center;
    background: linear-gradient(to top, rgba(5, 7, 11, 0.78), transparent);
    pointer-events: none;
}

.manual-progress {
    width: min(240px, 56vw);
    height: 3px;
    margin: 0 auto 10px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.24);
    border-radius: 999px;
}

.manual-progress span {
    display: block;
    width: calc(100% / 24);
    height: 100%;
    background: var(--manual-accent);
    border-radius: inherit;
    transform-origin: left center;
    transition: width 220ms ease-out;
}

.manual-hint {
    margin: 0;
    color: var(--manual-muted);
    font-size: 12px;
    line-height: 1.5;
}

.manual-viewer.is-ui-hidden .manual-toolbar,
.manual-viewer.is-ui-hidden .manual-nav,
.manual-viewer.is-ui-hidden .manual-footer {
    opacity: 0;
    pointer-events: none;
}

.manual-viewer.is-ui-hidden .manual-toolbar {
    transform: translateY(-8px);
}

.manual-viewer.is-ui-hidden .manual-footer {
    transform: translateY(8px);
}

.manual-noscript {
    position: fixed;
    z-index: 120;
    inset: 50% auto auto 50%;
    width: min(90vw, 360px);
    margin: 0;
    padding: 20px;
    color: #ffffff;
    text-align: center;
    background: #111827;
    border-radius: 12px;
    transform: translate(-50%, -50%);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 520px) {
    .manual-toolbar {
        grid-template-columns: 70px 1fr 108px;
    }

    .manual-home {
        min-width: 44px;
        width: 44px;
        padding: 0;
        justify-content: center;
    }

    .manual-home span {
        position: absolute;
        width: 1px;
        height: 1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
    }

    .manual-counter {
        justify-self: center;
    }

    .manual-zoom-controls button {
        min-width: 44px;
    }

    #manual-zoom-reset {
        display: none;
    }

    .manual-nav {
        top: auto;
        bottom: calc(env(safe-area-inset-bottom, 0px) + 42px);
        width: 48px;
        height: 48px;
        transform: none;
    }
}

@media (orientation: landscape) and (max-height: 520px) {
    .manual-toolbar {
        padding-top: calc(env(safe-area-inset-top, 0px) + 6px);
    }

    .manual-footer {
        padding-bottom: calc(env(safe-area-inset-bottom, 0px) + 6px);
    }

    .manual-hint {
        display: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}