:root {
    --header-height: 64px;
    --footer-height: auto;

    --font-ui: 'Roboto', system-ui, -apple-system, sans-serif;
    --font-code: 'JetBrains Mono', monospace;
    --transition-duration: 0.2s;
    --md-easing: cubic-bezier(0.2, 0, 0, 1);
    --transition-theme: background-color 0.3s var(--md-easing), color 0.3s var(--md-easing), border-color 0.3s var(--md-easing);

    --shape-small: 8px;
    --shape-medium: 12px;
    --shape-pill: 100px;

    --bg-color: #121316;
    --surface-color: #1E1F22;
    --surface-variant: #2B2D31;
    --primary-color: #3ddc84;
    --on-primary: #00391B;
    --text-primary: #E2E2E5;
    --text-secondary: #A0A0A5;
    --border-color: rgba(255, 255, 255, 0.08);
    --hover-overlay: rgba(255, 255, 255, 0.05);
    --active-overlay: rgba(61, 220, 132, 0.12);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);

    --desktop-tab-height: 36px;
    --desktop-tab-font-size: 0.95rem;

    --color-h2: #6CB6FF;
    --color-h3: #7986CB;
    --color-h4: #4DB6AC;
    --brand-gradient: linear-gradient(90deg, var(--color-h2), var(--color-h3), var(--color-h4), var(--primary-color));
}

[data-theme="light"] {
    --bg-color: #F8FDF9;
    --surface-color: #FFFFFF;
    --surface-variant: #E8F0EA;
    --primary-color: #1E8E3E;
    --on-primary: #FFFFFF;
    --text-primary: #1A1C19;
    --text-secondary: #424940;
    --border-color: rgba(0, 0, 0, 0.08);
    --hover-overlay: rgba(0, 0, 0, 0.04);
    --active-overlay: rgba(30, 142, 62, 0.12);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.03);

    --color-h2: #005CC5;
    --color-h3: #3949AB;
    --color-h4: #00796B;
    --brand-gradient: linear-gradient(90deg, var(--color-h2), var(--color-h3), var(--color-h4), var(--primary-color));
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-ui);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--bg-color);
    color: var(--text-primary);
    transition: var(--transition-theme);
    -webkit-font-smoothing: antialiased;
}

.main-container {
    display: flex;
    min-height: calc(100vh - var(--header-height) - 40px);
    width: 95%;
    max-width: 1600px;
    margin: 20px auto;
    box-sizing: border-box;
    background: var(--surface-color);
    border-radius: var(--shape-medium);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.form-group {
    margin: 12px 0;
}

.form-group label {
    display: block;
    margin-bottom: 4px;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.form-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--shape-small);
    background: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 0.95rem;
    box-sizing: border-box;
    transition: all var(--transition-duration);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--active-overlay);
}

.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.radio-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    position: relative;
}

.radio-label input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.radio-custom {
    display: inline-block;
    width: 18px;
    height: 18px;
    margin-right: 8px;
    border: 2px solid var(--text-secondary);
    border-radius: 50%;
    transition: all var(--transition-duration) var(--md-easing);
    position: relative;
}

.radio-label:hover .radio-custom {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--hover-overlay);
}

.radio-label input[type="radio"]:checked + .radio-custom {
    border-color: var(--primary-color);
}

.radio-label input[type="radio"]:checked + .radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 10px;
    height: 10px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: radioPop 0.2s var(--md-easing) forwards;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 16px 0 24px 0;
}

.checkbox-group input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--text-secondary);
    border-radius: 4px;
    background-color: transparent;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-duration);
}

.checkbox-group input[type="checkbox"]:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--hover-overlay);
}

.checkbox-group input[type="checkbox"]:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-group input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 4px;
    height: 8px;
    border: solid var(--bg-color);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-group label {
    margin-bottom: 0;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    user-select: none;
}

@keyframes radioPop {
    0% {
        transform: translate(-50%, -50%) scale(0);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
    }
}

@media (min-width: 1024px) {
    .json-setting {
        width: 40%;
        border-right: 1px solid var(--border-color);
    }

    .json-body {
        width: 60%;
    }
}