:root {
    --accent: #4CAF50;
    --bg: #f1f1f1;
    --panel-bg: #ffffff;
    --panel-border: #d9d9d9;
    --text: #222222;
    --muted: #666666;
    --code-bg: #0f172a;
    --code-text: #e2e8f0;
}

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

body {
    font-family: Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.header {
    background: var(--accent);
    color: #ffffff;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-left a {
    color: #ffffff;
    text-decoration: none;
    font-weight: bold;
}

.header h1 {
    font-size: 18px;
}

.actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn {
    padding: 8px 16px;
    border-radius: 4px;
    border: 1px solid transparent;
    font-weight: bold;
    font-size: 13px;
    cursor: pointer;
}

.btn-primary {
    background: #ffffff;
    color: #111111;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.45);
}

.main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    padding: 20px;
    min-height: calc(100vh - 70px - var(--site-shell-offset, 0px));
}

.panel {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 420px;
}

.panel-header {
    padding: 10px 14px;
    background: #f7f7f7;
    border-bottom: 1px solid var(--panel-border);
    font-weight: bold;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.panel-body {
    flex: 1;
    display: flex;
    flex-direction: column;
}

textarea.code {
    flex: 1;
    border: none;
    resize: none;
    padding: 12px;
    font-family: "Consolas", "Monaco", monospace;
    font-size: 13px;
    line-height: 1.4;
    outline: none;
}

.field {
    padding: 12px 14px;
    border-top: 1px solid var(--panel-border);
    background: #fafafa;
}

.field label {
    display: block;
    font-size: 12px;
    color: var(--muted);
    margin-bottom: 6px;
}

.field textarea,
.field input {
    width: 100%;
    border: 1px solid #cfcfcf;
    border-radius: 6px;
    padding: 8px;
    font-family: "Consolas", "Monaco", monospace;
    font-size: 12px;
}

.output {
    flex: 1;
    margin: 0;
    padding: 12px;
    background: var(--code-bg);
    color: var(--code-text);
    font-family: "Consolas", "Monaco", monospace;
    font-size: 13px;
    overflow: auto;
    white-space: pre-wrap;
}

@media (max-width: 980px) {
    .main {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .panel {
        min-height: 320px;
    }
}