:root {
    --bg: #f5f5f7;
    --card-bg: #ffffff;
    --text-main: #1d1d1f;
    --text-sub: #86868b;
    --border: #d2d2d7;
    --focus-ring: #0071e3;
    --help-link: #0ab5ff80;
    --danger: #ff3b30;
    --success: #34c759;
    --warning: #ff9f0a;
    --tag-bg: #e8e8ed;
    --radius: 10px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --code-bg: #f0f0f0;
}

/* 深色模式变量 */
html[data-theme="dark"] {
    --bg: #000000;
    --card-bg: #1c1c1e;
    --text-main: #f5f5f7;
    --text-sub: #86868b;
    --border: #424245;
    --tag-bg: #3a3f55;
    --focus-ring: #0a84ff;
    --help-link: #0164c7ca;
    --code-bg: #1c1c1e;
}

* {
    box-sizing: border-box;
    outline: none;
}

body {
    font-family: var(--font-sans);
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text-main);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header */
header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
    z-index: 10;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

header h1 {
    margin: 0;
    font-size: 1.2rem;
    font-weight: 600;
}

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

.icon-btn-header {
    background: transparent;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.icon-btn-header:hover {
    background: var(--tag-bg);
}

.icon-btn-header svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.icon-btn-header svg.stroke-icon {
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
}

/* Header Dropdown Specifics */
.header-dropdown-wrapper {
    position: relative;
}

.header-options {
    position: absolute;
    top: 120%;
    right: 0;
    left: auto;
    min-width: 140px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 30;
    display: none;
    overflow: hidden;
}

.header-options.open {
    display: block;
    animation: fadeIn 0.1s ease;
}

.header-options .custom-option {
    justify-content: space-between;
}

.check-icon {
    opacity: 0;
    color: var(--focus-ring);
}

.custom-option.selected .check-icon {
    opacity: 1;
}

/* Layout */
.main-layout {
    display: grid;
    grid-template-columns: minmax(400px, 2fr) 1fr;
    height: 100%;
    overflow: hidden;
}

.panel-left,
.panel-right {
    padding: 24px;
    height: 100%;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease;
}

.panel-left {
    border-right: 1px solid var(--border);
}

.panel-right {
    background: var(--card-bg);
}

/* 历史记录区域滚动样式 */
.scroll-area {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    padding-right: 4px;
    /* 为滚动条留出一点空间，避免内容紧贴 */
    margin-right: -4px;
    /* 将多余的空间移回，保持视觉对齐 */

    /* 滚动条样式 (Firefox) */
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

/* 滚动条样式 (Chrome, Safari, Edge) */
.scroll-area::-webkit-scrollbar {
    width: 12px;
}

.scroll-area::-webkit-scrollbar-track {
    background: transparent;
}

.scroll-area::-webkit-scrollbar-thumb {
    background-color: var(--border);
    border-radius: 10px;
    /* 创建一个“内边距”效果，让滚动条看起来更细 */
    border: 2px solid var(--card-bg);
}

.scroll-area::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-sub);
}

.form-group {
    margin-bottom: 18px;
    flex-shrink: 0;
}

label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-sub);
    margin-bottom: 6px;
    letter-spacing: 0.05em;
    text-transform: capitalize;
}

.form-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

/* 让原有的 label 在这个容器里不需要下边距，由容器控制 */
.form-header label {
    margin-bottom: 0;
}

/* 帮助链接样式 */
.help-link {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--help-link);
    text-decoration: none;
    cursor: pointer;
    transition: opacity 0.2s;
    font-weight: 500;
}

.help-link:hover {
    opacity: 0.7;
}

.help-link svg {
    width: 14px;
    height: 14px;
    stroke-width: 2;
}

/* API Display Box */
.api-display-box {
    display: flex;
    align-items: center;
    background: var(--code-bg);
    border: 1px dashed var(--focus-ring);
    padding: 10px 14px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    cursor: pointer;
    transition: background 0.2s;
    position: relative;
}

.api-display-box:hover {
    background: var(--tag-bg);
}

.api-label-badge {
    font-size: 0.7rem;
    font-weight: 700;
    background: var(--focus-ring);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    margin-right: 10px;
    flex-shrink: 0;
}

#apiUrlText {
    font-family: monospace;
    font-size: 0.9rem;
    flex-grow: 1;
    word-break: break-all;
}

.copy-hint {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.75rem;
    color: var(--focus-ring);
    opacity: 0;
    transition: opacity 0.2s;
    background: var(--tag-bg);
    padding-left: 8px;
    box-shadow: -8px 0 10px -2px var(--tag-bg);
    pointer-events: none;
    border-radius: 4px;
}

.api-display-box:hover .copy-hint {
    opacity: 1;
}

.btn:hover .copy-hint {
    opacity: 1;
}

/* URL Chips */
.chip-container {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 6px;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    min-height: 46px;
    cursor: text;
    transition: all 0.2s;
}

.chip-container:focus-within {
    border-color: var(--focus-ring);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.2);
}

#urlContainer {
    max-height: 25vh;
    overflow-y: auto;
}

.chip {
    background: var(--tag-bg);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    max-width: 100%;
    border: 1px solid transparent;
}

.chip svg {
    width: 14px;
    height: 14px;
    opacity: 0.7;
    flex-shrink: 0;
}

.chip-text {
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: text;
    outline: none;
    border-radius: 2px;
    padding: 0 2px;
    transition: all 0.2s;
}

.chip-text:hover {
    background: rgba(0, 0, 0, 0.05);
}

.chip-text:focus {
    background: var(--card-bg);
    color: var(--text-main);
    box-shadow: 0 0 0 2px var(--focus-ring);
    white-space: pre-wrap;
    word-break: break-all;
    overflow: visible;
}

.chip-close {
    cursor: pointer;
    opacity: 0.5;
    font-weight: bold;
    padding: 0 2px;
    flex-shrink: 0;
}

.chip-close:hover {
    opacity: 1;
    color: var(--danger);
}

.chip-input {
    border: none;
    background: transparent;
    flex-grow: 1;
    min-width: 150px;
    padding: 4px;
    font-size: 0.95rem;
    color: var(--text-main);
}

/* Custom Dropdown (Generic) */
.grid-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.custom-select-wrapper {
    position: relative;
    width: 100%;
}

.custom-select-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 10px 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-sub);
    transition: border-color 0.2s;
    user-select: none;
}

.custom-select-trigger:hover {
    border-color: var(--text-sub);
}

.custom-select-value {
    display: flex;
    align-items: center;
    gap: 8px;
}

.custom-select-value svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--text-sub);
}

.custom-options {
    position: absolute;
    top: 105%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 20;
    display: none;
    overflow: hidden;
}

.custom-options.open {
    display: block;
    animation: fadeIn 0.1s ease;
}

.custom-option {
    padding: 10px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    transition: background 0.1s;
    color: var(--text-main);
}

.custom-option:hover {
    background: var(--tag-bg);
}

.custom-option svg {
    width: 16px;
    height: 16px;
    color: var(--text-sub);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Inputs */
.input-std {
    width: 100%;
    padding: 10px 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-main);
    font-size: 0.95rem;
    appearance: none;
}

.input-std:focus {
    border-color: var(--focus-ring);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.2);
}

/* 全局降低 Placeholder 透明度 */
::placeholder {
    color: var(--text-sub);
    /* 使用次级文本颜色 */
    opacity: 0.5;
    /* 进一步降低不透明度 */
}

.form-group-fill {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 150px;
    margin-bottom: 18px;
}

textarea.input-std-fill {
    flex: 1;
    resize: none;
    width: 100%;
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-main);
    font-size: 0.95rem;
    line-height: 1.5;
    font-family: monospace;
}

textarea.input-std-fill:focus {
    border-color: var(--focus-ring);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.2);
}

/* Action Buttons */
.actions-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: auto;
}

.btn {
    border: none;
    padding: 12px 20px;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    position: relative;
}

.btn svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.btn-primary {
    background: var(--focus-ring);
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-secondary {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-main);
}

.btn-secondary:hover {
    background: var(--tag-bg);
}

.btn-copied {
    color: var(--success) !important;
    border-color: var(--success) !important;
    background: rgba(52, 199, 89, 0.1) !important;
}

/* 当按钮处于“已复制”状态时，隐藏提示语，避免遮挡“已复制!”文本 */
.btn-copied .copy-hint {
    opacity: 0 !important;
}

/* Right Panel */
.panel-header {
    padding: 0 0 16px 0;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    color: var(--text-sub);
    font-size: 0.9rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.btn-text-danger {
    background: none;
    border: none;
    color: var(--danger);
    font-size: 0.85rem;
    cursor: pointer;
}

#resultArea {
    padding: 15px;
    background: var(--code-bg);
    font-family: monospace;
    font-size: 0.85rem;
    white-space: pre-wrap;
    word-break: break-all;
    border-radius: var(--radius);
    border: 1px solid transparent;
    margin-bottom: 20px;
    max-height: 250px;
    overflow-y: auto;
    color: var(--text-main);
}

.response-ok {
    border-color: var(--success);
    color: var(--success) !important;
    background: rgba(52, 199, 89, 0.05) !important;
}

.response-err {
    border-color: var(--danger);
    color: var(--danger) !important;
    background: rgba(255, 59, 48, 0.05) !important;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.history-item {
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.2s;
    background: var(--card-bg);
}

.history-item:hover {
    border-color: var(--focus-ring);
}

.h-top {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-sub);
    margin-bottom: 4px;
}

.h-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-main);
}

.h-preview {
    font-size: 0.8rem;
    color: var(--text-sub);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: none;
}

.loading .spinner {
    display: block;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 900px) {
    .main-layout {
        grid-template-columns: 1fr;
        display: block;
        overflow-y: auto;
    }

    body {
        height: auto;
        overflow: auto;
    }

    .panel-left,
    .panel-right {
        height: auto;
        border: none;
        overflow: visible;
    }

    .panel-right {
        border-top: 8px solid var(--bg);
    }

    header {
        padding: 0 12px;
    }

    .panel-left,
    .panel-right {
        padding: 12px;
    }

    .api-display-box {
        padding: 10px 6px;
        /* position: relative; */
    }

    .api-display-box .copy-hint {
        right: 6px;
        top: auto;
        bottom: 10px;
        /* = line-height / 2 */
        transform: none;
    }

    textarea.input-std-fill {
        height: 180px;
    }

    .actions-row {
        grid-template-columns: 1fr 1fr;
    }
}