* { box-sizing: border-box; }
body {
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at 15% 20%, #1a2846, #0d1018 45%), #0d1018;
    color: #e7edf7;
    font-family: Arial, sans-serif;
    padding: 18px;
}

.editor-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
    border-bottom: 1px solid #2a3650;
    padding-bottom: 10px;
}

h1 {
    margin: 0;
    font-size: 1.5rem;
    color: #9ac8ff;
}

.subtitle {
    margin: 4px 0 0;
    color: #94a7c5;
    font-size: 0.9rem;
}

.top-link {
    color: #9ac8ff;
    text-decoration: none;
    border: 1px solid #3f557d;
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 0.9rem;
    white-space: nowrap;
}

.top-link:hover {
    background: #1a2438;
}

.layout {
    display: grid;
    grid-template-columns: minmax(280px, 360px) 1fr;
    gap: 14px;
    align-items: start;
}

.panel {
    background: #121a28;
    border: 1px solid #2a3650;
    border-radius: 8px;
    padding: 12px;
}

h2 {
    margin: 0 0 8px;
    font-size: 1rem;
    color: #9ac8ff;
}

.row {
    display: flex;
    gap: 8px;
    align-items: center;
    margin: 0 0 10px;
    flex-wrap: wrap;
}

.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: 100%;
}

label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.82rem;
    color: #bdcae1;
    flex: 1;
}

.stack-label {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 10px;
}

.checkline {
    flex-direction: row;
    align-items: center;
    gap: 6px;
}

.tool-palette {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 6px;
    width: 100%;
    border: 0;
    margin: 0;
    padding: 0;
    min-inline-size: 0;
}

.tool-btn {
    background: #1b355f;
    border: 1px solid #3f6db0;
    color: #d9e8ff;
    padding: 7px 10px;
    border-radius: 6px;
    font-size: 0.84rem;
}

.tool-btn:hover {
    background: #27508f;
}

.tool-btn.active {
    background: #66a5ff;
    border-color: #9bc4ff;
    color: #0b1628;
    font-weight: 700;
}

input[type="text"],
input[type="number"],
select,
textarea {
    width: 100%;
    background: #0c1018;
    color: #e7edf7;
    border: 1px solid #2f3f5f;
    border-radius: 6px;
    padding: 7px;
    font-size: 0.86rem;
}

textarea {
    min-height: 110px;
    resize: vertical;
    font-family: Consolas, monospace;
}

#header-output {
    min-height: 220px;
}

button {
    background: #24477e;
    color: #fff;
    border: 1px solid #3f6db0;
    border-radius: 6px;
    padding: 7px 12px;
    cursor: pointer;
    font-size: 0.84rem;
}

button:hover {
    background: #2c5aa0;
}

button.danger {
    background: #5f2438;
    border-color: #8c3a56;
}

button.danger:hover {
    background: #7a2c48;
}

.tools-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    background: #0d1520;
    border: 1px solid #2a3650;
    border-radius: 8px;
    padding: 8px 10px;
    margin-bottom: 10px;
}

.tools-row {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.tool-label {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 0.78rem;
    color: #bdcae1;
}

.canvas-wrap {
    border: 1px solid #2f3f5f;
    background: #080b12;
    border-radius: 8px;
    padding: 10px;
    display: inline-block;
    max-width: 100%;
    overflow: auto;
}

#editor-canvas {
    display: block;
    image-rendering: pixelated;
    border: 1px solid #1e2b43;
}

#editor-canvas.tool-pen {
    cursor: crosshair;
}

#editor-canvas.tool-eraser {
    cursor: cell;
}

#editor-canvas.tool-bucket {
    cursor: pointer;
}

#editor-canvas.tool-picker {
    cursor: copy;
}

.status {
    margin: 10px 0;
    min-height: 22px;
    color: #a9bddf;
    font-size: 0.84rem;
}

.hidden {
    display: none;
}

@media (max-width: 900px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .two-col {
        grid-template-columns: 1fr;
    }
}