:root {
    --tool-glow: color-mix(in srgb, var(--tool-accent) 24%, transparent);
}

body[data-book-style="inferno"] {
    --book-stage-glow: rgba(255, 94, 32, 0.26);
    --book-stage-floor: rgba(77, 17, 8, 0.72);
}

body[data-book-style="tide"] {
    --book-stage-glow: rgba(40, 196, 255, 0.22);
    --book-stage-floor: rgba(5, 48, 69, 0.72);
}

body[data-book-style="royal"] {
    --book-stage-glow: rgba(222, 92, 255, 0.18);
    --book-stage-floor: rgba(52, 26, 61, 0.68);
}

* { box-sizing: border-box; }

.hidden {
    display: none !important;
}

body {
    margin: 0;
    height: 100vh;
    overflow: hidden;
    background:
        radial-gradient(circle at top right, color-mix(in srgb, var(--tool-accent) 16%, transparent) 0%, transparent 38%),
        linear-gradient(180deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.01) 100%),
        var(--tool-bg);
    color: var(--tool-text);
    font: 14px/1.5 Inter, system-ui, sans-serif;
}

/* Global container prevents body-level scrolling */
.app-shell {
    display: flex;
    flex: 1 1 auto;
    height: 100vh;
    overflow: hidden;
}

/* Root shell fills viewport, no scroll */
.tool-shell {
    height: 100vh;
    width: 100vw;
    display: grid;
    grid-template-columns: 360px minmax(0, 1fr);
    background: transparent;
    overflow: hidden;
}

body[data-dashboard-sidebar-externalized="true"] .tool-shell {
    grid-template-columns: minmax(0, 1fr);
}

body[data-dashboard-sidebar-externalized="true"] .tool-sidebar {
    display: none;
}

/* Left sidebar: independent vertical scrollbar */
.tool-sidebar {
    display: grid;
    gap: 14px;
    align-content: start;
    padding: 20px;
    height: 100%;
    overflow-y: auto;
    overflow-x: hidden;
    border-right: 1px solid var(--tool-line);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.01) 100%),
        rgba(10, 10, 12, 0.24);
}

/* Custom scrollbar styling for left sidebar */
.tool-sidebar::-webkit-scrollbar {
    width: 8px;
}

.tool-sidebar::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 4px;
}

.tool-sidebar::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--tool-accent) 40%, transparent);
    border-radius: 4px;
}

.tool-sidebar::-webkit-scrollbar-thumb:hover {
    background: color-mix(in srgb, var(--tool-accent) 60%, transparent);
}

/* Center area: no scrolling, content fits within */
.tool-main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 440px);
    align-items: start;
    gap: 20px;
    padding: 20px;
    height: 100%;
    overflow: hidden;
}

.tool-section,
.workspace-card {
    display: grid;
    gap: 12px;
    padding: 16px;
    border-radius: 18px;
    border: 1px solid var(--tool-line);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.045) 0%, rgba(255,255,255,0.01) 100%),
        var(--tool-surface);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05), 0 18px 34px rgba(0,0,0,0.22);
}

/* Right sidebar (page queue): independent vertical scrollbar */
.current-pages-card {
    position: sticky;
    top: 0;
    height: 100%;
    max-height: calc(100vh - 40px);
    overflow: hidden;
    align-self: start;
    display: grid;
    grid-template-rows: auto 1fr;
}

/* Page queue list gets its own scrollbar */
.current-pages-card .page-queue {
    max-height: none;
    height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 4px;
}

/* Custom scrollbar styling for right sidebar page queue */
.current-pages-card .page-queue::-webkit-scrollbar {
    width: 8px;
}

.current-pages-card .page-queue::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 4px;
}

.current-pages-card .page-queue::-webkit-scrollbar-thumb {
    background: color-mix(in srgb, var(--tool-accent) 40%, transparent);
    border-radius: 4px;
}

.current-pages-card .page-queue::-webkit-scrollbar-thumb:hover {
    background: color-mix(in srgb, var(--tool-accent) 60%, transparent);
}

.current-pages-card h3 {
    margin: 2px 0 4px;
    font-size: 20px;
    line-height: 1.1;
}

.current-pages-card .page-queue {
    max-height: calc(100vh - 188px);
}

.tool-kicker,
.section-label {
    color: var(--tool-muted);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.workspace-head h2 {
    margin: 0;
    font-size: 30px;
    line-height: 1.05;
}

.section-hint,
.status-text {
    margin: 0;
    color: var(--tool-muted);
}

.section-heading,
.column-head,
.workspace-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.column-actions {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.field-stack,
.button-row {
    display: grid;
    gap: 10px;
}

.button-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.upload-card,
button,
select,
input,
textarea {
    font: inherit;
}

.upload-card {
    min-height: 160px;
    display: grid;
    gap: 12px;
    align-content: center;
    justify-items: center;
    text-align: center;
    border-radius: 14px;
    border: 2px dashed var(--tool-line-strong);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0.01) 100%),
        rgba(8, 8, 10, 0.28);
    color: var(--tool-text);
    cursor: pointer;
    padding: 24px;
    transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.upload-card:hover {
    border-color: var(--tool-accent);
    background:
        radial-gradient(circle at center, color-mix(in srgb, var(--tool-accent) 10%, transparent) 0%, transparent 50%),
        linear-gradient(180deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.015) 100%),
        rgba(8, 8, 10, 0.32);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--tool-accent) 20%, transparent);
}

.upload-card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: color-mix(in srgb, var(--tool-accent) 12%, transparent);
    color: var(--tool-accent);
    font-size: 32px;
    font-weight: 700;
    line-height: 1;
}

/* Arrow download icon variant */
.upload-card-icon.arrow-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: color-mix(in srgb, var(--tool-accent) 12%, transparent);
    color: var(--tool-accent);
    font-size: 32px;
}

.upload-card strong {
    color: var(--tool-text);
    font-size: 0.95rem;
    font-weight: 600;
}

.upload-card span {
    color: var(--tool-muted);
    font-size: 0.82rem;
}

button,
select,
input,
textarea {
    min-height: 40px;
    border-radius: 12px;
    border: 1px solid var(--tool-line);
}

select,
input,
textarea {
    width: 100%;
    padding: 10px 12px;
    background: rgba(8, 10, 16, 0.8);
    color: var(--tool-text);
}

textarea {
    resize: vertical;
}

.book-tabs {
    display: flex;
    gap: 6px;
    overflow-x: auto;
}

.book-tab {
    min-height: 34px;
    padding: 0 12px;
    white-space: nowrap;
}

.book-tab.active {
    border-color: var(--tool-line-strong);
    background: color-mix(in srgb, var(--tool-accent) 22%, transparent);
}

button {
    background: rgba(255,255,255,0.04);
    color: var(--tool-text);
    cursor: pointer;
    transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

button:hover {
    transform: translateY(-1px);
    border-color: var(--tool-line-strong);
}

.secondary-button,
.ghost-button {
    background: rgba(255,255,255,0.04);
}

.seal-button {
    grid-column: 1 / -1;
    border-color: color-mix(in srgb, var(--tool-accent) 42%, var(--tool-line));
    background:
        linear-gradient(180deg, color-mix(in srgb, var(--tool-accent) 14%, transparent) 0%, rgba(255,255,255,0.035) 100%);
    font-weight: 700;
}

.compact-button {
    min-height: 34px;
    padding: 0 12px;
    font-size: 12px;
}

.media-overlay-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.media-tray-tabs {
    display: flex;
    gap: 8px;
    padding: 4px;
    border-radius: 14px;
    border: 1px solid var(--tool-line);
    background: rgba(0,0,0,0.16);
}

.media-tray-tab {
    flex: 1 1 0;
    min-height: 34px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 700;
}

.media-tray-tab.active {
    border-color: var(--tool-line-strong);
    background: color-mix(in srgb, var(--tool-accent) 22%, transparent);
}

.tray-pane {
    display: none;
    gap: 12px;
    min-height: 0;
}

.tray-pane.active {
    display: grid;
}

.media-overlay-column {
    display: grid;
    gap: 8px;
    min-width: 0;
}

.media-list,
.page-queue {
    display: grid;
    gap: 8px;
    max-height: 360px;
    overflow: auto;
    padding-right: 4px;
}

.media-empty {
    min-height: 88px;
    display: grid;
    place-items: center;
    padding: 14px;
    border-radius: 14px;
    border: 1px dashed var(--tool-line);
    background: rgba(0,0,0,0.16);
    text-align: center;
    color: var(--tool-muted);
}

.media-card,
.page-card {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    padding: 8px;
    border-radius: 12px;
    border: 1px solid var(--tool-line);
    background: rgba(255,255,255,0.03);
}

.page-card {
    cursor: grab;
}

.page-card.dragging {
    opacity: 0.55;
    border-style: dashed;
}

.page-card.drop-target {
    border-color: color-mix(in srgb, var(--tool-accent) 72%, white 8%);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--tool-accent) 36%, transparent);
}

.media-card.active {
    border-color: color-mix(in srgb, var(--tool-accent) 68%, white 8%);
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--tool-accent) 28%, transparent);
}

.media-thumb {
    width: 64px;
    height: 64px;
    object-fit: cover;
    border-radius: 10px;
    border: 1px solid var(--tool-line);
    background: rgba(0,0,0,0.18);
}

.media-meta {
    min-width: 0;
    display: grid;
    gap: 2px;
}

.page-title-input,
.page-text-input {
    min-height: 30px;
    padding: 6px 8px;
    border-radius: 8px;
    font-size: 12px;
}

.page-text-input {
    min-height: 54px;
}

.media-name,
.page-name {
    font-weight: 700;
    color: var(--tool-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.media-detail,
.page-detail {
    font-size: 12px;
    color: var(--tool-muted);
    line-height: 1.35;
}

.media-actions,
.page-actions {
    display: grid;
    gap: 6px;
}

.page-slot-button {
    min-height: 30px;
    min-width: 88px;
    padding: 0 10px;
    font-size: 12px;
}

.icon-button {
    min-height: 32px;
    min-width: 72px;
    padding: 0 10px;
    font-size: 12px;
}

.book-stage {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 0;
    height: 100%;
    min-height: clamp(620px, calc(100vh - 220px), 920px);
    padding: 6px 16px;
    border-radius: 18px;
    border: 1px solid var(--tool-line);
    background:
        radial-gradient(circle at top, color-mix(in srgb, var(--tool-accent) 12%, transparent) 0%, transparent 42%),
        rgba(8, 10, 16, 0.82);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.04),
        0 0 0 1px rgba(255,255,255,0.02),
        0 0 60px color-mix(in srgb, var(--book-stage-glow, rgba(255, 94, 32, 0.22)) 60%, transparent),
        inset 0 0 120px color-mix(in srgb, var(--book-stage-glow, rgba(255, 94, 32, 0.18)) 52%, transparent);
    overflow: hidden;
}

.book-closed-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    min-height: 34px;
}

.book-inspect-button {
    width: 40px;
    min-width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 24px rgba(0,0,0,0.28);
}

.book-inspect-button svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.book-inspect-button.is-active {
    border-color: color-mix(in srgb, var(--tool-accent) 56%, transparent);
    background: color-mix(in srgb, var(--tool-accent) 18%, rgba(255,255,255,0.05));
    color: color-mix(in srgb, var(--tool-text) 88%, var(--tool-accent) 12%);
    box-shadow:
        0 12px 28px rgba(0,0,0,0.32),
        0 0 24px color-mix(in srgb, var(--tool-accent) 28%, transparent);
}

.book-stage-atmosphere {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 50% 42%, var(--book-stage-glow, rgba(255, 94, 32, 0.22)) 0%, transparent 34%),
        radial-gradient(ellipse at 50% 92%, var(--book-stage-floor, rgba(77, 17, 8, 0.68)) 0%, transparent 56%);
    pointer-events: none;
    filter: blur(2px);
}

.book-magnifier-lens {
    position: absolute;
    width: 196px;
    height: 196px;
    border-radius: 50%;
    overflow: hidden;
    pointer-events: none;
    z-index: 4;
    border: 3px solid color-mix(in srgb, var(--tool-text) 74%, var(--tool-accent) 26%);
    background: radial-gradient(circle at 35% 30%, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.04) 24%, rgba(0,0,0,0.08) 100%);
    box-shadow:
        0 16px 34px rgba(0,0,0,0.44),
        0 0 28px color-mix(in srgb, var(--book-stage-glow, rgba(255, 94, 32, 0.22)) 74%, transparent),
        inset 0 0 0 2px rgba(255,255,255,0.18);
}

.book-magnifier-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.floating-media-tray {
    position: sticky;
    top: 20px;
    width: 100%;
    max-height: calc(100vh - 96px);
    display: grid;
    gap: 12px;
    padding: 16px;
    border-radius: 18px;
    border: 1px solid var(--tool-line-strong);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.015) 100%),
        color-mix(in srgb, var(--tool-surface-strong) 90%, black 10%);
    box-shadow:
        0 24px 40px rgba(0,0,0,0.34),
        inset 0 1px 0 rgba(255,255,255,0.05);
    backdrop-filter: blur(12px);
    overflow: hidden;
}

.media-tray-overlay {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 24;
    width: min(760px, calc(100vw - 48px));
    max-height: calc(100vh - 48px);
}

.tray-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    cursor: grab;
    user-select: none;
}

.floating-media-tray.dragging .tray-head {
    cursor: grabbing;
}

.tray-head-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.tray-close-button {
    width: 34px;
    min-width: 34px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    line-height: 1;
}

.tray-head h3 {
    margin: 2px 0 0;
    font-size: 18px;
    line-height: 1.1;
}

.tray-controls {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: end;
}

.tray-upload-button {
    min-height: 40px;
    padding: 0 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    border: 1px dashed var(--tool-line-strong);
    background: rgba(255,255,255,0.04);
    color: var(--tool-text);
    cursor: pointer;
    font-weight: 600;
}

.tray-grid .media-list {
    max-height: min(280px, 28vh);
}

.tray-grid {
    min-height: 0;
}

.context-menu {
    position: fixed;
    z-index: 30;
    min-width: 200px;
    padding: 8px;
    border-radius: 14px;
    border: 1px solid var(--tool-line-strong);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.015) 100%),
        color-mix(in srgb, var(--tool-surface-strong) 92%, black 8%);
    box-shadow: 0 18px 34px rgba(0,0,0,0.34);
    display: grid;
    gap: 6px;
}

.context-menu button {
    min-height: 36px;
    justify-content: flex-start;
    padding: 0 12px;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 10px;
}

.context-menu-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.3em;
    font-size: 14px;
}

canvas {
    position: relative;
    z-index: 1;
    max-width: 100%;
    height: auto;
    display: block;
    cursor: pointer;
    border-radius: 10px;
    transform-origin: 50% 50%;
}

@media (max-width: 1320px) {
    .tool-shell {
        grid-template-columns: 1fr;
    }

    .tool-sidebar {
        border-right: 0;
        border-bottom: 1px solid var(--tool-line);
    }

    .floating-media-tray:not(.media-tray-overlay) {
        position: static;
        width: 100%;
        max-height: none;
    }

    .current-pages-card {
        position: static;
        max-height: none;
    }

    .tool-main {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 880px) {
    .media-overlay-grid,
    .button-row,
    .tray-controls {
        grid-template-columns: 1fr;
    }

    .media-card,
    .page-card {
        grid-template-columns: 1fr;
    }

    .media-thumb {
        width: 100%;
        height: 160px;
    }
}

/* ===== New UI Elements ===== */

/* Workspace preview card layout */
/* Center preview card: no scroll, fixed to container */
.workspace-preview-card {
    display: grid;
    gap: 12px;
    height: 100%;
    overflow: hidden;
}

.workspace-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

/* Zoom controls */
.zoom-controls {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px;
    border-radius: 8px;
    background: rgba(0,0,0,0.2);
}

.zoom-level {
    font-size: 12px;
    font-weight: 700;
    color: var(--tool-muted);
    min-width: 46px;
    text-align: center;
    user-select: none;
}

/* Page counter */
.page-counter {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 14px;
    border-radius: 20px;
    background: rgba(0,0,0,0.55);
    backdrop-filter: blur(8px);
    color: var(--tool-muted);
    font-size: 13px;
    font-weight: 600;
    z-index: 2;
    user-select: none;
}

.book-stage {
    position: relative;
}

/* Quick Controls card */
.tool-controls-card {
    border-color: color-mix(in srgb, var(--tool-accent) 18%, transparent);
    background: linear-gradient(135deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.01) 100%), var(--tool-surface);
}

/* Keyboard shortcuts card */
.tool-shortcuts-card {
    border-color: var(--tool-line);
    background: linear-gradient(135deg, rgba(255,255,255,0.02) 0%, rgba(255,255,255,0.005) 100%), var(--tool-surface);
}

.shortcuts-list {
    display: grid;
    gap: 6px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--tool-muted);
}

.shortcut-item kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 22px;
    padding: 0 5px;
    border-radius: 5px;
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--tool-line-strong);
    font-family: inherit;
    font-size: 11px;
    font-weight: 700;
    color: var(--tool-text);
}

/* Export overlay */
.export-overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    background: rgba(0,0,0,0.65);
    backdrop-filter: blur(8px);
}

.export-card {
    padding: 32px;
    border-radius: 18px;
    border: 1px solid var(--tool-line-strong);
    background: var(--tool-surface-strong);
    text-align: center;
    min-width: 340px;
}

.export-card h3 {
    margin: 0 0 8px;
    font-size: 22px;
}

.export-card p {
    color: var(--tool-muted);
    margin-bottom: 16px;
}

.export-card .secondary-button,
.export-card .ghost-button {
    margin: 4px;
}

/* Responsive adjustments */
@media (max-width: 880px) {
    .zoom-controls {
        display: none;
    }

    .page-counter {
        font-size: 12px;
        padding: 4px 10px;
    }

    .tool-shortcuts-card {
        display: none;
    }
}