html {
    scrollbar-gutter: stable;
}

body {
    background-color: #121212;
    color: #e0e0e0;
    font-family: Arial, sans-serif;
    font-size: 150%;
    padding: 30px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

h1 {
    text-align: center;
    font-size: 2.5em;
    color: #ffffff;
}

#content {
    display: none;
    align-items: flex-start;
    gap: 30px;
    margin-top: 30px;
    margin-bottom: 30px;
    flex: 1;
}

#canvas {
    border: 2px solid #444;
    background-color: #1e1e1e;
    max-height: 50vh;
    max-width: 40%;
    overflow: auto;
}

#output {
    white-space: pre-wrap;
    font-size: 1em;
    border: 2px solid #444;
    padding: 20px;
    flex: 1;
    min-width: 300px;
    background-color: #1e1e1e;
    color: #e0e0e0;
}

#uploadContainer {
    display: flex;
    gap: 30px;
    margin-top: 30px;
}

.upload-section {
    border: 3px dashed #666;
    padding: 20px;
    text-align: center;
    color: #bbb;
    cursor: pointer;
    font-size: 1.1em;
    background-color: #1e1e1e;
    transition: background-color 0.3s, border-color 0.3s;
    flex: 1;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-section:hover {
    background-color: #2a2a2a;
    border-color: #888;
}

#fileInput {
    display: none;
}

.history-section {
    margin-top: 30px;
    border: 2px solid #444;
    background-color: #1e1e1e;
    padding: 15px;
}

.history-header {
    cursor: pointer;
    padding: 10px;
    background-color: #2a2a2a;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-content {
    display: none;
    padding: 10px;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
    max-height: 500px;
    overflow-y: auto;
}

.history-item {
    border: 1px solid #444;
    padding: 10px;
    text-align: center;
}

.history-thumbnail {
    max-width: 100%;
    height: 100px;
    object-fit: contain;
    cursor: pointer;
}

.clear-history {
    background: #f36c1c;
    border: none;
    color: white;
    padding: 5px 10px;
    cursor: pointer;
    border-radius: 3px;
}

.no-highlight {
    user-select: none;
}

button {
    font-size: 0.8em;
}

.history-header span::before {
    content: '➤';
    margin-left: 10px;
    display: inline-block;
    transition: transform 0.2s ease;
}

.history-section.expanded .history-header span::before {
    transform: rotate(90deg);
}

.history-section {
    transition: transform 0.2s ease;
}

.history-section {
    margin-top: auto;
    width: calc(100% - 60px);
    position: sticky;
    bottom: 0;
    background: #121212;
    z-index: 1;
}