:root {
    color-scheme: dark;
    --ecv-bg: #111318;
    --ecv-panel: #1d222a;
    --ecv-panel-soft: #292f39;
    --ecv-border: rgba(255, 255, 255, 0.14);
    --ecv-text: #f7f8fa;
    --ecv-muted: #aeb6c2;
    --ecv-accent: #78aef8;
    --ecv-control-bg: #242a33;
    --ecv-control-bg-hover: #303845;
    --ecv-control-border: rgba(255, 255, 255, 0.12);
    --ecv-control-border-hover: rgba(120, 174, 248, 0.58);
    --ecv-danger: #ff9696;
    --ecv-header-height: 70px;
    --ecv-footer-height: 66px;
}

* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; }
body.ecv-body {
    margin: 0;
    overflow: hidden;
    background: var(--ecv-bg);
    color: var(--ecv-text);
    font-family: Arial, "Noto Sans KR", sans-serif;
    -webkit-font-smoothing: antialiased;
}
button, input, select { font: inherit; }
button, a { color: inherit; }
button { cursor: pointer; }

.ecv-app {
    position: relative;
    display: grid;
    grid-template-rows: var(--ecv-header-height) minmax(0, 1fr) var(--ecv-footer-height);
    width: 100%;
    min-height: 100vh;
    min-height: 100dvh;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
    background: radial-gradient(circle at 50% 42%, rgba(74, 90, 115, 0.34), transparent 48%), var(--ecv-bg);
}

.ecv-header,
.ecv-footer {
    position: relative;
    z-index: 30;
    display: flex;
    align-items: center;
    border-color: var(--ecv-border);
    background: rgba(17, 19, 24, 0.95);
    backdrop-filter: blur(16px);
}

.ecv-header {
    justify-content: space-between;
    gap: 18px;
    min-width: 0;
    padding: 10px 16px;
    border-bottom: 1px solid var(--ecv-border);
}

.ecv-title-wrap { min-width: 0; flex: 0 1 auto; }
.ecv-kicker { display: block; margin-bottom: 2px; color: var(--ecv-muted); font-size: 10px; font-weight: 700; letter-spacing: .14em; }
.ecv-title { overflow: hidden; max-width: min(34vw, 520px); margin: 0; font-size: 18px; line-height: 1.25; text-overflow: ellipsis; white-space: nowrap; }

.ecv-header-tools {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    min-width: 0;
}

.ecv-mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 44px;
    padding: 0 13px;
    /* border: 1px solid var(--ecv-control-border);
    background: var(--ecv-control-bg); */
    border:none;
    background: transparent;
    border-radius: 10px;
    color: var(--ecv-text);
    font-size: 13px;
    font-weight: 700;
}
.ecv-mobile-menu-toggle > span:first-child { font-size: 20px; line-height: 1; }
.ecv-mobile-menu-toggle:hover,
.ecv-mobile-menu-toggle:focus-visible,
.ecv-mobile-menu-toggle[aria-expanded="true"] {
    border-color: rgba(120, 174, 248, .78);
    background: var(--ecv-panel-soft);
}
.ecv-mobile-menu-toggle:focus-visible {
    outline: 3px solid rgba(120, 174, 248, .86);
    outline-offset: 2px;
}

.ecv-header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    min-width: 0;
}

.ecv-tool-button,
.ecv-icon-button,
.ecv-fit-button,
.ecv-footer-button,
.ecv-page-arrow,
.ecv-panel-close,
.ecv-retry-button,
.ecv-print-option,
.ecv-toc-item {
    appearance: none;
    -webkit-appearance: none;
    /* border: 1px solid var(--ecv-control-border);
    background: var(--ecv-control-bg); */
    border: none;
    background: transparent;
    color: var(--ecv-text);
    box-shadow: 0 7px 18px rgba(0, 0, 0, .16);
    transition: background-color .15s ease, border-color .15s ease, box-shadow .15s ease, opacity .15s ease, transform .15s ease;
}

.ecv-tool-button:hover,
.ecv-icon-button:hover,
.ecv-fit-button:hover,
.ecv-footer-button:hover,
.ecv-page-arrow:hover,
.ecv-panel-close:hover,
.ecv-retry-button:hover,
.ecv-print-option:hover,
.ecv-toc-item:hover {
    border-color: var(--ecv-control-border-hover);
    background: var(--ecv-control-bg-hover);
    box-shadow: 0 9px 22px rgba(0, 0, 0, .22);
}

.ecv-tool-button:active,
.ecv-icon-button:active,
.ecv-fit-button:active,
.ecv-footer-button:active,
.ecv-page-arrow:active,
.ecv-panel-close:active,
.ecv-retry-button:active,
.ecv-print-option:active,
.ecv-toc-item:active {
    transform: translateY(1px);
}

.ecv-tool-button:focus-visible,
.ecv-icon-button:focus-visible,
.ecv-fit-button:focus-visible,
.ecv-footer-button:focus-visible,
.ecv-page-arrow:focus-visible,
.ecv-panel-close:focus-visible,
.ecv-retry-button:focus-visible,
.ecv-print-option:focus-visible,
.ecv-toc-item:focus-visible,
.ecv-thumbnail:focus-visible,
.ecv-page-shell:focus-visible,
.ecv-navigator-frame:focus-visible {
    outline: 3px solid rgba(120, 174, 248, .86);
    outline-offset: 2px;
}

.ecv-tool-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 42px;
    padding: 0 12px;
    border-radius: 9px;
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
    text-decoration: none;
}
.ecv-tool-button > span:first-child { color: #d7e6fb; font-size: 18px; line-height: 1; }
.ecv-tool-button.is-active { border-color: rgba(120, 174, 248, .76); background: #274b75; box-shadow: 0 8px 22px rgba(39, 75, 117, .34); }
.ecv-tool-link { text-decoration: none; }

.ecv-main {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr) 64px;
    min-width: 0;
    min-height: 0;
    padding: 14px;
}

.ecv-viewport {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    min-height: 0;
    overflow: hidden;
    touch-action: none;
    user-select: none;
}
.ecv-viewport.is-pannable { cursor: grab; }
.ecv-viewport.is-dragging { cursor: grabbing; }

.ecv-navigator {
    position: absolute;
    z-index: 24;
    top: 14px;
    left: 14px;
    width: clamp(118px, 12vw, 172px);
    padding: 7px;
    border: 1px solid rgba(255, 255, 255, .34);
    border-radius: 9px;
    background: rgba(17, 19, 24, .9);
    color: #fff;
    box-shadow: 0 10px 32px rgba(0, 0, 0, .36);
    backdrop-filter: blur(8px);
}
.ecv-navigator[hidden] { display: none; }
.ecv-navigator-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 5px;
    font-size: 10px;
    line-height: 1.2;
}
.ecv-navigator-head span { color: var(--ecv-muted); font-weight: 700; }
.ecv-navigator-head strong { color: #fff; font-size: 10px; }
.ecv-navigator-frame {
    position: relative;
    display: block;
    width: 100%;
    min-width: 0;
    padding: 0;
    overflow: hidden;
    border: 2px solid rgba(255, 255, 255, .78);
    border-radius: 3px;
    background: #fff;
    touch-action: none;
    cursor: crosshair;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, .3);
}
.ecv-navigator-frame.is-dragging { cursor: grabbing; }
.ecv-navigator-frame img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
    -webkit-user-drag: none;
}
.ecv-navigator-window {
    position: absolute;
    z-index: 2;
    min-width: 8px;
    min-height: 8px;
    border: 2px solid #2f7cff;
    background: rgba(47, 124, 255, .14);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, .92), 0 0 8px rgba(47, 124, 255, .8);
    pointer-events: none;
}

.ecv-page-shell {
    position: relative;
    overflow: visible;
    flex: 0 0 auto;
    background: #fff;
    box-shadow: 0 22px 60px rgba(0, 0, 0, .46);
    transform: translateZ(0);
    cursor: zoom-in;
}
.is-zoomed .ecv-page-shell { cursor: grab; }
.ecv-transform-layer { width: 100%; height: 100%; transform-origin: center center; will-change: transform; }
.ecv-page-image { display: block; width: 100%; height: 100%; object-fit: contain; background: #fff; -webkit-user-drag: none; }
.ecv-page-shell.is-changing .ecv-page-image { animation: ecv-page-fade .2s ease; }
@keyframes ecv-page-fade { from { opacity: .25; transform: scale(.995); } to { opacity: 1; transform: scale(1); } }

.ecv-page-arrow {
    align-self: center;
    justify-self: center;
    display: grid;
    place-items: center;
    width: 48px;
    height: 64px;
    padding: 0;
    border-radius: 14px;
    font-size: 42px;
    line-height: 1;
}
.ecv-page-arrow:disabled,
.ecv-footer-button:disabled,
.ecv-icon-button:disabled { opacity: .3; cursor: not-allowed; }

.ecv-loading,
.ecv-image-error {
    position: absolute;
    z-index: 10;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    min-width: 220px;
    padding: 18px 20px;
    border: 1px solid var(--ecv-border);
    border-radius: 12px;
    background: rgba(17, 19, 24, .94);
    text-align: center;
    box-shadow: 0 16px 40px rgba(0, 0, 0, .35);
}
.ecv-loading[hidden], .ecv-image-error[hidden] { display: none; }
.ecv-image-error strong { display: block; margin-bottom: 12px; color: var(--ecv-danger); font-size: 14px; }
.ecv-retry-button { min-height: 40px; padding: 0 15px; border-radius: 8px; }

.ecv-footer { justify-content: center; gap: 24px; padding: 8px 16px; border-top: 1px solid var(--ecv-border); }
.ecv-page-navigation, .ecv-zoom-controls { display: flex; align-items: center; gap: 8px; }
.ecv-footer-button, .ecv-icon-button, .ecv-fit-button { min-height: 42px; border-radius: 9px; }
.ecv-footer-button { min-width: 72px; padding: 0 13px; font-weight: 700; }
.ecv-footer-button--icon { min-width: 48px; }
.ecv-counter { display: flex; align-items: baseline; justify-content: center; gap: 6px; min-width: 84px; color: var(--ecv-muted); font-size: 14px; }
.ecv-counter strong { color: var(--ecv-text); font-size: 18px; }
.ecv-icon-button { width: 42px; padding: 0; font-size: 21px; }
.ecv-fit-button { padding: 0 14px; font-size: 13px; font-weight: 700; }
.ecv-zoom-value { min-width: 54px; color: var(--ecv-muted); font-size: 13px; text-align: center; }

.ecv-side-panel {
    position: fixed;
    z-index: 70;
    top: 0;
    bottom: 0;
    width: min(400px, 92vw);
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    border-right: 1px solid var(--ecv-border);
    background: #191d23;
    box-shadow: 18px 0 50px rgba(0, 0, 0, .45);
    transform: translateX(-105%);
    transition: transform .22s ease;
}
.ecv-side-panel.is-open { transform: translateX(0); }
.ecv-thumbnail-panel { left: auto; right: 0; border-right: 0; border-left: 1px solid var(--ecv-border); box-shadow: -18px 0 50px rgba(0,0,0,.45); transform: translateX(105%); }
.ecv-thumbnail-panel.is-open { transform: translateX(0); }

.ecv-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    padding: 0 16px;
    border-bottom: 1px solid var(--ecv-border);
}
.ecv-panel-head > div { display: flex; align-items: baseline; gap: 8px; }
.ecv-panel-head strong { font-size: 17px; }
.ecv-panel-head span { color: var(--ecv-muted); font-size: 13px; }
.ecv-panel-close { width: 42px; height: 42px; padding: 0; border-radius: 50%; font-size: 25px; }

.ecv-thumbnail-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    max-height: calc(100vh - 70px);
    max-height: calc(100dvh - 70px);
    padding: 16px;
    overflow-y: auto;
    overscroll-behavior: contain;
}
.ecv-thumbnail {
    min-width: 0;
    padding: 7px;
    border: 2px solid transparent;
    border-radius: 10px;
    background: var(--ecv-panel);
    color: var(--ecv-text);
    text-align: left;
    cursor: pointer;
}
.ecv-thumbnail:hover { background: var(--ecv-panel-soft); }
.ecv-thumbnail.is-current { border-color: var(--ecv-accent); }
.ecv-thumbnail-image-wrap { display: block; overflow: hidden; aspect-ratio: 1400 / 990; border-radius: 6px; background: #fff; }
.ecv-thumbnail img { display: block; width: 100%; height: 100%; object-fit: contain; }
.ecv-thumbnail-label { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; padding-top: 7px; }
.ecv-thumbnail-label strong { font-size: 15px; }
.ecv-thumbnail-label small { overflow: hidden; color: var(--ecv-muted); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }

.ecv-toc-list { max-height: calc(100vh - 70px); max-height: calc(100dvh - 70px); padding: 14px; overflow-y: auto; }
.ecv-toc-group + .ecv-toc-group { margin-top: 8px; }
.ecv-toc-item { width: 100%; min-height: 44px; padding: 9px 12px; border-radius: 9px; color: var(--ecv-text); text-align: left; }
.ecv-toc-item--root { font-weight: 700; }
.ecv-toc-item--child { min-height: 40px; margin-top: 5px; padding-left: 24px; color: #d5dae1; font-size: 13px; }
.ecv-toc-item.is-heading { border-style: dashed; color: var(--ecv-muted); cursor: default; }
.ecv-toc-item.is-current { border-color: var(--ecv-accent); background: #274b75; }
.ecv-toc-children { margin-left: 10px; padding-left: 10px; border-left: 1px solid var(--ecv-border); }
.ecv-panel-empty { padding: 34px 16px; color: var(--ecv-muted); text-align: center; }

.ecv-panel-backdrop {
    position: fixed;
    z-index: 60;
    inset: 0;
    border: 0;
    background: rgba(0, 0, 0, .58);
}
.ecv-panel-backdrop[hidden] { display: none; }

.ecv-dialog {
    position: fixed;
    z-index: 75;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 20px;
    pointer-events: none;
    opacity: 0;
    transform: scale(.98);
    transition: opacity .16s ease, transform .16s ease;
}
.ecv-dialog.is-open { pointer-events: auto; opacity: 1; transform: scale(1); }
.ecv-dialog-card { width: min(520px, 100%); overflow: hidden; border: 1px solid var(--ecv-border); border-radius: 16px; background: #191d23; box-shadow: 0 24px 70px rgba(0,0,0,.55); }
.ecv-dialog-head { display: flex; align-items: center; justify-content: space-between; padding: 16px 18px; border-bottom: 1px solid var(--ecv-border); }
.ecv-dialog-head h2 { margin: 0; font-size: 18px; }
.ecv-print-options { display: grid; gap: 10px; padding: 18px; }
.ecv-print-option { display: grid; gap: 5px; min-height: 82px; padding: 14px 16px; border-radius: 12px; color: var(--ecv-text); text-align: left; }
.ecv-print-option strong { font-size: 15px; }
.ecv-print-option span { color: var(--ecv-muted); font-size: 13px; line-height: 1.5; }

.ecv-toast {
    position: fixed;
    z-index: 90;
    left: 50%;
    bottom: calc(var(--ecv-footer-height) + 18px + env(safe-area-inset-bottom));
    transform: translateX(-50%);
    max-width: min(90vw, 520px);
    padding: 11px 15px;
    border: 1px solid var(--ecv-border);
    border-radius: 10px;
    background: rgba(17, 19, 24, .96);
    color: var(--ecv-text);
    font-size: 13px;
    box-shadow: 0 14px 36px rgba(0,0,0,.38);
}
.ecv-toast[hidden] { display: none; }

@media (max-width: 1180px) {
    .ecv-title { max-width: 22vw; }
    .ecv-tool-button { padding: 0 10px; }
    .ecv-tool-button span:last-child { display: none; }
    .ecv-tool-button > span:first-child { font-size: 20px; }
}

@media (max-width: 767px) {
    :root { --ecv-header-height: 64px; --ecv-footer-height: 116px; }
    .ecv-app { grid-template-rows: var(--ecv-header-height) minmax(0, 1fr) var(--ecv-footer-height); }
    .ecv-header { gap: 10px; overflow: visible; padding: 8px 10px; }
    .ecv-title-wrap { flex: 1 1 auto; }
    .ecv-kicker { font-size: 8px; }
    .ecv-title { max-width: min(62vw, 250px); font-size: 14px; }
    .ecv-header-tools { flex: 0 0 auto; margin-left: auto; }
    .ecv-mobile-menu-toggle { display: inline-flex; }
    .ecv-header-actions {
        position: absolute;
        z-index: 85;
        top: calc(100% + 8px);
        right: 0;
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
        width: min(310px, calc(100vw - 20px));
        padding: 10px;
        overflow: visible;
        border: 1px solid var(--ecv-border);
        border-radius: 14px;
        background: rgba(25, 29, 35, .98);
        box-shadow: 0 20px 54px rgba(0, 0, 0, .52);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateY(-8px) scale(.98);
        transform-origin: top right;
        transition: opacity .16s ease, transform .16s ease, visibility .16s ease;
    }
    .ecv-header-actions.is-mobile-open {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: translateY(0) scale(1);
    }
    .ecv-header-actions .ecv-tool-button {
        width: 100%;
        min-height: 48px;
        padding: 0 12px;
        justify-content: flex-start;
        gap: 10px;
    }
    .ecv-header-actions .ecv-tool-button > span:first-child { flex: 0 0 24px; font-size: 20px; text-align: center; }
    .ecv-header-actions .ecv-tool-button > span:last-child { display: inline; overflow: hidden; text-overflow: ellipsis; }
    .ecv-header-actions .ecv-tool-link { grid-column: 1 / -1; }
    .ecv-main { grid-template-columns: 38px minmax(0, 1fr) 38px; padding: 8px 4px; }
    .ecv-navigator {
        top: 8px;
        left: 8px;
        width: clamp(96px, 28vw, 124px);
        padding: 5px;
        border-radius: 7px;
    }
    .ecv-navigator-head { margin-bottom: 4px; font-size: 9px; }
    .ecv-navigator-head strong { font-size: 9px; }
    .ecv-navigator-window { border-width: 1px; }
    .ecv-page-arrow { width: 34px; height: 54px; border-radius: 10px; font-size: 34px; }
    .ecv-footer { flex-direction: column; gap: 6px; padding: 7px 8px; }
    .ecv-page-navigation, .ecv-zoom-controls { width: 100%; justify-content: center; }
    .ecv-footer-button { min-width: 58px; min-height: 40px; padding: 0 9px; font-size: 12px; }
    .ecv-footer-button--icon { min-width: 42px; }
    .ecv-counter { min-width: 62px; }
    .ecv-icon-button { width: 40px; min-height: 40px; }
    .ecv-fit-button { min-height: 40px; }
    .ecv-side-panel { top: auto; bottom: 0; width: 100%; height: min(72vh, 640px); padding-top: 0; border-top: 1px solid var(--ecv-border); border-right: 0; transform: translateY(105%); }
    .ecv-side-panel.is-open, .ecv-thumbnail-panel.is-open { transform: translateY(0); }
    .ecv-thumbnail-panel { right: 0; left: 0; border-left: 0; }
    .ecv-panel-head { height: 62px; }
    .ecv-thumbnail-list { grid-template-columns: repeat(2, minmax(0,1fr)); max-height: calc(72vh - 62px); padding: 12px; }
    .ecv-toc-list { max-height: calc(72vh - 62px); }
    .ecv-dialog { align-items: end; padding: 0; }
    .ecv-dialog-card { width: 100%; border-radius: 18px 18px 0 0; }
    .ecv-toast { bottom: calc(var(--ecv-footer-height) + 10px + env(safe-area-inset-bottom)); }
}

@media (max-width: 420px) {
    .ecv-title { max-width: 58vw; }
    .ecv-main { grid-template-columns: 32px minmax(0,1fr) 32px; }
    .ecv-page-arrow { width: 30px; }
    .ecv-footer-button { min-width: 52px; }
    .ecv-fit-button { padding: 0 10px; }
    .ecv-zoom-value { min-width: 48px; }
}

/* Full-page single-sheet curl.
 * The 1400 x 990 catalog image is one complete page. The whole page bends
 * from an outer corner and leaves the next page underneath; no center spine.
 */
.ecv-viewport {
    perspective: 2600px;
    perspective-origin: 50% 50%;
}

.ecv-page-shell {
    isolation: isolate;
    transform-style: preserve-3d;
}

.ecv-page-turn {
    --ecv-turn-crease-x: 104%;
    --ecv-turn-shadow-opacity: 0;
    --ecv-turn-shadow-width: 5%;
    --ecv-turn-shadow-skew: -7.5deg;
    --ecv-turn-edge-opacity: 0;
    position: absolute;
    z-index: 18;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    contain: layout paint style;
    background: #fff;
}

.ecv-page-turn__under,
.ecv-page-turn__canvas {
    position: absolute;
    inset: 0;
}

.ecv-page-turn__under {
    z-index: 1;
    overflow: hidden;
    background: #fff;
}

.ecv-page-turn__image {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #fff;
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
}

.ecv-page-turn__canvas {
    z-index: 4;
    display: block;
    width: 100%;
    height: 100%;
    background: transparent;
    transform: translateZ(0);
    filter: drop-shadow(0 10px 10px rgba(0, 0, 0, .19));
    will-change: contents;
}

.ecv-page-turn__cast-shadow {
    position: absolute;
    z-index: 3;
    top: -14%;
    bottom: -14%;
    left: var(--ecv-turn-crease-x);
    width: var(--ecv-turn-shadow-width);
    opacity: var(--ecv-turn-shadow-opacity);
    transform: translate3d(-50%, 0, 0) skewY(var(--ecv-turn-shadow-skew));
    transform-origin: center;
    pointer-events: none;
    filter: blur(9px);
    background:
        linear-gradient(
            90deg,
            rgba(0, 0, 0, 0) 0,
            rgba(0, 0, 0, .06) 20%,
            rgba(0, 0, 0, .31) 50%,
            rgba(0, 0, 0, .10) 68%,
            rgba(0, 0, 0, 0) 100%
        );
    will-change: left, width, opacity, transform;
}

.ecv-page-turn--backward .ecv-page-turn__cast-shadow {
    --ecv-turn-shadow-skew: 7.5deg;
    transform: translate3d(-50%, 0, 0) skewY(var(--ecv-turn-shadow-skew)) scaleX(-1);
}

.ecv-page-turn__edge-glow {
    position: absolute;
    z-index: 5;
    top: -8%;
    bottom: -8%;
    left: var(--ecv-turn-crease-x);
    width: 2px;
    opacity: var(--ecv-turn-edge-opacity);
    transform: translateX(-50%) skewY(var(--ecv-turn-shadow-skew));
    pointer-events: none;
    background: rgba(255, 255, 255, .82);
    box-shadow:
        0 0 5px rgba(255, 255, 255, .48),
        2px 0 9px rgba(0, 0, 0, .12);
    will-change: left, opacity, transform;
}

.ecv-page-turn--backward .ecv-page-turn__edge-glow {
    --ecv-turn-shadow-skew: 7.5deg;
}

.is-page-turning .ecv-page-shell,
.is-page-turning .ecv-viewport {
    cursor: default;
}

@media (max-width: 767px) {
    .ecv-page-turn__canvas {
        filter: drop-shadow(0 7px 7px rgba(0, 0, 0, .17));
    }

    .ecv-page-turn__cast-shadow {
        filter: blur(6px);
    }
}

@media (prefers-reduced-motion: reduce) {
    .ecv-page-turn {
        display: none !important;
    }
}

/* High-resolution zoom image support */
.ecv-page-image {
    image-rendering: auto;
    image-rendering: smooth;
}

.ecv-app.is-high-resolution .ecv-page-image {
    image-rendering: auto;
}

/* Original PDF canvas zoom */
.ecv-transform-layer {
    position: relative;
}

.ecv-page-canvas {
    position: absolute;
    z-index: 2;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    background: #fff;
    opacity: 0;
    pointer-events: none;
    transition: opacity .12s ease;
}

.ecv-page-canvas[hidden] {
    display: none !important;
}

.ecv-page-canvas.is-ready {
    opacity: 1;
}

.ecv-page-image {
    position: relative;
    z-index: 1;
    transition: opacity .12s ease;
}

.ecv-page-image.is-canvas-covered {
    opacity: 0;
}

.ecv-app.is-pdf-canvas-rendering .ecv-page-shell::after {
    position: absolute;
    z-index: 9;
    top: 12px;
    right: 12px;
    padding: 7px 10px;
    border: 1px solid rgba(255, 255, 255, .22);
    border-radius: 999px;
    background: rgba(14, 19, 28, .86);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    content: '원본 PDF 렌더링 중';
    pointer-events: none;
    box-shadow: 0 6px 18px rgba(0, 0, 0, .28);
}

.ecv-app.is-page-turning .ecv-page-canvas {
    opacity: 0;
}

@media (max-width: 767px) {
    .ecv-app.is-pdf-canvas-rendering .ecv-page-shell::after {
        top: 8px;
        right: 8px;
        padding: 6px 8px;
        font-size: 11px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ecv-page-canvas,
    .ecv-page-image {
        transition: none;
    }
}
/* Mobile full-width page navigation and pinch zoom */
@media (max-width: 767px) {
    .ecv-main {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        grid-template-rows: minmax(0, 1fr) 54px;
        gap: 8px;
        padding: 8px;
    }

    .ecv-viewport {
        grid-column: 1 / -1;
        grid-row: 1;
        min-width: 0;
        min-height: 0;
        touch-action: none;
    }

    .ecv-page-arrow {
        align-self: stretch;
        justify-self: stretch;
        width: 100%;
        height: 54px;
        min-width: 0;
        padding: 0;
        border-radius: 12px;
        font-size: 28px;
    }

    .ecv-page-arrow--prev {
        grid-column: 1;
        grid-row: 2;
    }

    .ecv-page-arrow--next {
        grid-column: 2;
        grid-row: 2;
    }

    .ecv-page-arrow span {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        width: 100%;
        height: 100%;
    }

    .ecv-page-arrow--prev span::after {
        content: '이전';
        font-size: 13px;
        font-weight: 700;
        letter-spacing: -.02em;
    }

    .ecv-page-arrow--next span::before {
        content: '다음';
        font-size: 13px;
        font-weight: 700;
        letter-spacing: -.02em;
    }

    .ecv-viewport.is-pinching {
        cursor: zoom-in;
    }
}

/* PDF.js direct page view */
.ecv-page-shell.is-changing .ecv-page-canvas {
    animation: ecv-page-fade .2s ease;
}

.ecv-loading {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: #fff;
    font-size: 14px;
    font-weight: 700;
}

.ecv-loading::before {
    width: 18px;
    height: 18px;
    flex: 0 0 auto;
    border: 2px solid rgba(255, 255, 255, .28);
    border-top-color: #fff;
    border-radius: 50%;
    content: '';
    animation: ecv-pdf-loading-spin .72s linear infinite;
}

@keyframes ecv-pdf-loading-spin {
    to { transform: rotate(360deg); }
}

.ecv-page-turn__image:is(canvas) {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.ecv-app.is-page-loading .ecv-page-arrow,
.ecv-app.is-page-loading .ecv-footer-button {
    cursor: wait;
}

@media (prefers-reduced-motion: reduce) {
    .ecv-loading::before {
        animation-duration: 1.4s;
    }
}
/*
 * PDF page-turn white-flash handoff hotfix
 * Keep the ready PDF canvas visible behind the WebGL turn overlay.
 * Without this override, commitPage() hides the fallback image while
 * is-page-turning still forces the canvas to opacity: 0 for one frame.
 */
.ecv-app.is-page-turning .ecv-page-canvas.is-ready {
    opacity: 1;
    transition: none;
}