:root {
    --primary-color: #8b8b8b;
    --slider-hover: #636363;
    --bg-color: #e6e6e6;
    --input-bg: #ffffff;
    --text-color: #000000;
    --toolbar-bg: #f7f7f7;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.15);
    --thumbnail-active: #eaeaea;
    --toolbar-width: 48px;
    --sidebar-width: 200px;
    --base-gap: 20px;
}

[data-theme="dark"] {
    --primary-color: #9f9f9f;
    --slider-hover: #d1d1d1;
    --bg-color: #2d2d2d;
    --input-bg: #333333;
    --text-color: #ffffff;
    --toolbar-bg: #252526;
    --border-color: #3c3c3c;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --thumbnail-active: #37373d;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    overflow: hidden;
    font-family: Segoe UI, sans-serif;
    transition: background 0.3s;
}

.toolbar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: var(--toolbar-width);
    background: var(--toolbar-bg);
    border-right: 1px solid var(--border-color);
    padding: 12px 4px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 1000;
}

.toolbar button {
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    border-radius: 4px;
    cursor: pointer;
    color: var(--text-color);
    transition: background 0.2s;
}

.toolbar button:hover {
    background: var(--thumbnail-active);
}

.thumbnail-sidebar {
    position: fixed;
    left: var(--toolbar-width);
    top: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background: var(--toolbar-bg);
    border-right: 1px solid var(--border-color);
    padding: 12px;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.3s;
    z-index: 999;
}

.thumbnail-sidebar.active {
    transform: translateX(0);
}

.thumbnail-container {
    margin-bottom: 12px;
    text-align: center;
}

.thumbnail {
    width: 100%;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 4px;
    transition: border-color 0.2s;
    margin-bottom: 4px;
}

.thumbnail.active {
    border-color: var(--primary-color);
}

.thumbnail-page-number {
    font-size: 12px;
    color: var(--text-color);
    text-align: center;
}

.container {
    position: fixed;
    left: var(--toolbar-width);
    right: 0;
    top: 0;
    bottom: 0;
    overflow-x: hidden;
    overflow-y: auto;
}

::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--toolbar-bg);
    border-radius: 10px;
    box-shadow: inset 0 0 6px var(--shadow-color);
}

::-webkit-scrollbar-thumb {
    background-color: var(--primary-color);
    border-radius: 10px;
    border: 3px solid var(--toolbar-bg);
    background-clip: content-box;
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--slider-hover);
}

.pages-container::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.pages-container::-webkit-scrollbar-track {
    background: var(--bg-color);
    border-radius: 6px;
}

.pages-container::-webkit-scrollbar-thumb {
    background-color: var(--primary-color);
    border-radius: 6px;
}

.pages-container::-webkit-scrollbar-thumb:hover {
    background-color: var(--primary-color);
}

.pages-container {
    width: 100%;
    padding: 20px 0;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--base-gap);
    transform-origin: top center;
    transition: transform 0.3s ease;
    overflow-x: hidden;
    transform: none !important;
    max-width: 100%;
    align-items: flex-start;
}

.double-page .pages-container {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-start;
}

.double-page .page {
    margin: 0;
    width: calc(50% - var(--base-gap) / 2);
    flex: 0 0 auto;
}

.double-page .page:last-child:nth-child(odd) {
    margin-right: auto;
}

.page {
    background: var(--bg-color);
    box-shadow: 0 2px 8px var(--shadow-color);
    margin: 0 auto;
    transition: margin 0.2s;
}


#pageInput {
    width: 30px;
    padding: 4px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--input-bg);
    color: var(--text-color);
    text-align: center;
    margin-bottom: 8px;
}

.svg-image {
    display: block;
    width: 100%;
    height: auto;
    max-width: 2480px;
    max-height: 3508px;
    margin: 0 auto;
    background-color: #fff;
    transform-origin: center;
    transition: transform 0.2s;
}

.controls {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--toolbar-bg);
    padding: 8px 16px;
    border-radius: 24px;
    box-shadow: 0 2px 8px var(--shadow-color);
    display: flex;
    gap: 12px;
    align-items: center;
}

.controls input {
    width: 60px;
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-color);
    color: var(--text-color);
    text-align: center;
}

.controls button {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-color);
    color: var(--text-color);
    cursor: pointer;
}

.zoom-level {
    position: fixed;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--toolbar-bg);
    padding: 6px 12px;
    border-radius: 4px;
    box-shadow: 0 2px 8px var(--shadow-color);
    opacity: 0;
    transition: opacity 0.3s;
}

.zoom-level.show {
    opacity: 1;
}