:root {
    --primary: #f472b6; /* 粉嫩主色 */
    --primary-dark: #ec4899;
    --primary-light: #fb7185;
    --primary-bg: #fff0f5;
    --success: #34d399;
    --danger: #f87171;
    --warning: #fbbf24;
    --dark: #4b5563;
    --light: #fef2f8;
    --gray: #cbd5e1;
    --gray-light: #f1f5f9;
    --gray-dark: #94a3b8;
    --border-radius: 12px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease-in-out;
}

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

body {
    font-family: 'Poppins', 'Inter', sans-serif;
    line-height: 1.6;
    background: linear-gradient(135deg, #ffe4e6, #fef2f8);
    color: var(--dark);
    min-height: 100vh;
    padding: 24px; /* 直接给 body 留一点内边距，不用 container */
    background-attachment: fixed;
    background-size: cover;
}

/* 不需要 container 了，所以注释掉 */
.container {
    /* max-width: 1200px;
    margin: 0 auto; */
    padding: 0; /* 或者直接删掉整个 container 样式 */
}

header {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 2px dashed var(--primary-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
}

.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 28px;
    margin-bottom: 24px;
    width: 100%; /* 卡片自然占满宽度 */
    border: 1px solid var(--gray-light);
    transition: var(--transition);
    animation: fadeIn 1s ease;
}

/* 其他子元素保持不变，继承 body 的大范围布局 */

.form-group {
    margin-bottom: 16px;
    position: relative;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--primary-dark);
    font-size: 15px;
}

.form-control, .form-select, .json-editor {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 15px;
    transition: var(--transition);
    background-color: var(--light);
    color: var(--dark);
}

.form-control:focus, .form-select:focus, .json-editor:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 5px rgba(244, 114, 182, 0.3);
    background: #fff;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 15px;
    line-height: 1;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: scale(1.05);
}

.btn-secondary {
    background-color: white;
    color: var(--primary-dark);
    border: 1px solid var(--gray);
}

.btn-secondary:hover {
    background-color: var(--gray-light);
}

.btn-success, .btn-danger {
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #6ee7b7, #34d399);
}

.btn-success:hover {
    transform: scale(1.05);
}

.btn-danger {
    background: linear-gradient(135deg, #fca5a5, #f87171);
}

.btn-danger:hover {
    transform: scale(1.05);
}

.flex-container {
    display: flex;
    gap: 16px;
}

.flex-item {
    flex: 1;
}

.tabs, .response-tabs {
    display: flex;
    border-bottom: 2px solid var(--primary-bg);
    margin-bottom: 16px;
}

.tab, .response-tab {
    padding: 10px 18px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-dark);
    border-bottom: 3px solid transparent;
    transition: var(--transition);
    border-radius: 8px 8px 0 0;
}

.tab:hover, .response-tab:hover {
    color: var(--primary-dark);
    background: var(--light);
}

.tab.active, .response-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    background-color: var(--light);
}

.tab-content, .response-content {
    display: none;
}

.tab-content.active, .response-content.active {
    display: block;
    animation: fadeIn 0.8s ease;
}

.kv-pair {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    align-items: center;
}

.kv-pair .form-control {
    flex: 1;
}

.response-container {
    margin-top: 24px;
    display: none;
}

.response-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.status-badge {
    padding: 5px 10px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 700;
}

.status-2xx {
    background-color: #d1fae5;
    color: #065f46;
}

.status-4xx {
    background-color: #fef2f2;
    color: #b91c1c;
}

.status-5xx {
    background-color: #fef9c3;
    color: #92400e;
}

.response-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--gray-dark);
    font-size: 14px;
}

.response-pre {
    background: var(--light);
    padding: 18px;
    border-radius: var(--border-radius);
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    max-height: 450px;
    border: 1px solid var(--gray-light);
}

.response-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    justify-content: flex-end;
}

.response-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-light);
}

.error-message {
    background-color: #ffe4e6;
    color: #be123c;
    padding: 14px;
    border-radius: var(--border-radius);
    font-size: 14px;
    display: none;
}

.empty-state {
    text-align: center;
    padding: 50px 0;
    color: var(--gray);
}

.empty-state i {
    font-size: 48px;
    color: var(--gray-light);
    margin-bottom: 16px;
}

.empty-state p {
    font-size: 15px;
    color: var(--gray-dark);
}

/* 小动画们 */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-6px); }
    100% { transform: translateY(0px); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .flex-container {
        flex-direction: column;
    }

    .tabs, .response-tabs {
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: 6px;
    }

    .response-header {
        flex-wrap: wrap;
        gap: 10px;
    }

    .card {
        padding: 20px;
    }
}