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

body {
    font-family: system-ui, sans-serif;
    padding: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

h1 { margin-bottom: 0.25rem; }

h2 {
    font-size: 1rem;
    margin-top: 1.5rem;
    margin-bottom: 0.25rem;
}

h2:first-child { margin-top: 0; }

.subtitle {
    color: #666;
    margin-bottom: 2rem;
}

.hint {
    font-size: 0.8rem;
    color: #666;
}

.builder {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 768px) {
    .builder { grid-template-columns: 1fr; }
}

.form-panel, .preview-panel {
    min-width: 0;
}

textarea {
    width: 100%;
    font-family: monospace;
    font-size: 0.85rem;
    padding: 0.5rem;
    margin-top: 0.5rem;
    resize: vertical;
}

input[type="text"] {
    width: 100%;
    padding: 0.3rem 0.5rem;
}

.upload-btn {
    display: inline-block;
    margin-top: 0.5rem;
    cursor: pointer;
    font-size: 0.85rem;
    text-decoration: underline;
    color: #333;
}

.upload-btn input[type="file"] { display: none; }

.options {
    display: grid;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.type-select {
    border: none;
    padding: 0;
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: 0.5rem;
}

.field {
    display: grid;
    gap: 0.2rem;
}

#generate-btn {
    margin-top: 1rem;
    padding: 0.4rem 1.2rem;
    cursor: pointer;
}

.warning {
    margin-top: 0.75rem;
    padding: 0.5rem;
    font-size: 0.85rem;
    background: #fff3cd;
    border: 1px solid #ddc;
}

.info {
    margin-top: 0.75rem;
    padding: 0.5rem;
    font-size: 0.85rem;
    background: #e8f4fd;
    border: 1px solid #bee;
}

#output {
    margin-top: 1.5rem;
}

.notice {
    margin-top: 1rem;
    padding: 0.5rem;
    font-size: 0.8rem;
    color: #555;
    background: #f5f5f5;
    border: 1px solid #ddd;
}

.snippet-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: 0.75rem;
}

.snippet-row {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.snippet-row input {
    flex: 1;
    font-family: monospace;
    font-size: 0.8rem;
    padding: 0.3rem 0.5rem;
}

.snippet-row button {
    padding: 0.3rem 0.6rem;
    cursor: pointer;
}

.range-row {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.range-row .field {
    flex: 1;
}

.range-row input[type="number"] {
    width: 100%;
    padding: 0.3rem 0.5rem;
}

.chart-container {
    position: relative;
    width: 100%;
    height: 400px;
    margin-top: 0.5rem;
}