* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
    font-size: 13px;
    background: #1e1e1e;
    color: #ddd;
    overflow: hidden;
}

#toolbar {
    height: 44px;
    background: #2a2a2a;
    border-bottom: 1px solid #3a3a3a;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
}

#file-info {
    display: flex;
    gap: 12px;
    align-items: center;
    color: #aaa;
}

#current-filename {
    font-weight: 600;
    color: #eee;
}

#controls {
    display: flex;
    align-items: center;
    gap: 6px;
}

button {
    background: #3a3a3a;
    color: #ddd;
    border: 1px solid #4a4a4a;
    border-radius: 4px;
    padding: 5px 10px;
    cursor: pointer;
    font-size: 12px;
}

button:hover {
    background: #454545;
}

button:active {
    background: #505050;
}

button:disabled {
    opacity: 0.4;
    cursor: default;
}

.divider {
    width: 1px;
    height: 22px;
    background: #444;
    margin: 0 4px;
}

.chk {
    display: flex;
    align-items: center;
    gap: 4px;
    color: #aaa;
}

#save-status {
    min-width: 70px;
    color: #7fbf7f;
    font-size: 12px;
}

#save-status.dirty {
    color: #d9a441;
}

#save-status.error {
    color: #e06060;
}

#main {
    display: flex;
    height: calc(100% - 44px);
}

#sidebar {
    width: 240px;
    background: #242424;
    border-right: 1px solid #3a3a3a;
    display: flex;
    flex-direction: column;
}

#dir-picker {
    display: flex;
    padding: 8px;
    gap: 4px;
    border-bottom: 1px solid #333;
}

#dir-input {
    flex: 1;
    background: #1a1a1a;
    border: 1px solid #444;
    color: #ddd;
    border-radius: 4px;
    padding: 5px 6px;
    font-size: 12px;
}

#image-list {
    overflow-y: auto;
    flex: 1;
}

.image-list-item {
    padding: 7px 10px;
    cursor: pointer;
    border-bottom: 1px solid #2a2a2a;
    display: flex;
    justify-content: space-between;
    align-items: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.image-list-item:hover {
    background: #2e2e2e;
}

.image-list-item.active {
    background: #35506e;
}

.dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #555;
    flex-shrink: 0;
    margin-left: 6px;
}

.dot.done {
    background: #4caf50;
}

#canvas-wrap {
    flex: 1;
    position: relative;
    overflow: hidden;
    background:
        linear-gradient(45deg, #262626 25%, transparent 25%),
        linear-gradient(-45deg, #262626 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #262626 75%),
        linear-gradient(-45deg, transparent 75%, #262626 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
    background-color: #1a1a1a;
}

#canvas {
    position: absolute;
    top: 0;
    left: 0;
    cursor: crosshair;
}