.twc-tool-wrapper { --p-bg: #ffffff; --p-border: #e2e8f0; --p-primary: #1d9bf0; --p-text: #0f172a; width: 100%; max-width: 1300px; margin: 0 auto; background: var(--p-bg); border-radius: 20px; padding: 24px; border: 1px solid var(--p-border); box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05); box-sizing: border-box; }
.twc-header-main { font-size: 1.6rem; font-weight: 800; color: var(--p-text); margin-bottom: 8px; text-align: center; }
.twc-subtitle { color: #64748b; font-size: 0.95rem; padding-bottom: 20px; border-bottom: 1px solid var(--p-border); margin-bottom: 24px; text-align: center; max-width: 800px; margin-left: auto; margin-right: auto; line-height: 1.6; }

/* 布局与面板 */
.twc-layout { display: flex; flex-direction: column; gap: 24px; }
.twc-panel { display: flex; flex-direction: column; background: #f8fafc; border: 1px solid var(--p-border); border-radius: 16px; overflow: hidden; padding: 0; box-sizing: border-box; }
.twc-preview-panel { background: #f1f5f9; padding: 24px; display: flex; align-items: center; justify-content: flex-start; flex-direction: column; box-sizing: border-box; }
.twc-panel-title { font-size: 1.05rem; font-weight: 700; color: #334155; padding: 20px; border-bottom: 1px solid var(--p-border); background: #ffffff; margin: 0; }
.twc-preview-panel .twc-panel-title { background: transparent; border-bottom: none; }

/* 表单与网格 */
.twc-config-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; padding: 24px; box-sizing: border-box; }
.twc-config-section { display: flex; flex-direction: column; }
.twc-section-title { font-size: 0.95rem; font-weight: 700; color: #475569; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; border-bottom: 1px dashed #cbd5e1; padding-bottom: 10px; }

.twc-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 12px; }
.twc-form-group { display: flex; flex-direction: column; margin-bottom: 12px; }
.twc-label { font-size: 0.85rem; font-weight: 600; color: #64748b; margin-bottom: 6px; }

.twc-input, .twc-select, .twc-textarea { width: 100%; padding: 10px 12px; border-radius: 8px; border: 1px solid #cbd5e1; background: #ffffff; color: var(--p-text); font-size: 0.95rem; outline: none; transition: 0.2s; box-sizing: border-box; }
.twc-textarea { resize: vertical; min-height: 100px; font-family: inherit; }
.twc-input:focus, .twc-select:focus, .twc-textarea:focus { border-color: var(--p-primary); box-shadow: 0 0 0 3px rgba(29, 155, 240, 0.15); }

.twc-file-upload { display: block; width: 100%; border: 1px dashed #94a3b8; background: #ffffff; border-radius: 8px; padding: 10px; text-align: center; cursor: pointer; transition: 0.2s; box-sizing: border-box; }
.twc-file-upload:hover { border-color: var(--p-primary); background: #f0f9ff; color: var(--p-primary); }
.twc-file-upload input[type="file"] { display: none; }
.twc-file-upload span { font-size: 0.85rem; font-weight: 600; color: #475569; }

/* 悬浮工具栏 (颜色预设) */
.twc-theme-picker-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 20px; margin-top: 24px; padding: 16px 24px; background: #ffffff; border: 1px solid var(--p-border); border-radius: 16px; box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05); box-sizing: border-box; width: 100%; max-width: 600px; }
.twc-theme-label { font-weight: 700; color: #475569; font-size: 0.95rem; white-space: nowrap; }
.twc-bg-presets { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.twc-bg-dot { width: 32px; height: 32px; border-radius: 50%; cursor: pointer; border: 2px solid #ffffff; box-shadow: 0 2px 5px rgba(0,0,0,0.15); transition: 0.2s; }
.twc-bg-dot:hover { transform: scale(1.1); }
.twc-bg-dot.active { transform: scale(1.2); outline: 2px solid var(--p-primary); outline-offset: 2px; }
.twc-select-sm { padding: 8px; border-radius: 6px; border: 1px solid #cbd5e1; background: #f8fafc; color: #0f172a; font-size: 0.85rem; outline: none; font-weight: 600; }

/* 按钮 */
.twc-btn-primary { background: var(--p-primary); color: white; border: none; padding: 10px 24px; border-radius: 20px; font-weight: 700; font-size: 0.95rem; cursor: pointer; transition: 0.2s; display: flex; align-items: center; gap: 6px; box-shadow: 0 4px 12px rgba(29, 155, 240, 0.3); }
.twc-btn-primary:hover { background: #1a8cd8; transform: translateY(-1px); }

/* ================= 黑夜模式 (工具自身外壳适配) ================= */
[data-theme="dark"] .twc-tool-wrapper { background: #1e293b; border-color: #334155; }
[data-theme="dark"] .twc-header-main, [data-theme="dark"] .twc-panel-title { color: #f8fafc; }
[data-theme="dark"] .twc-panel { background: #0f172a; border-color: #475569; }
[data-theme="dark"] .twc-panel-title { background: #1e293b; border-bottom-color: #475569; }
[data-theme="dark"] .twc-preview-panel { background: #020617; }
[data-theme="dark"] .twc-section-title { border-bottom-color: #334155; }
[data-theme="dark"] .twc-label { color: #cbd5e1; }
[data-theme="dark"] .twc-input, [data-theme="dark"] .twc-select, [data-theme="dark"] .twc-textarea { background: #020617; border-color: #475569; color: #f8fafc; }
[data-theme="dark"] .twc-file-upload { background: #1e293b; border-color: #475569; }
[data-theme="dark"] .twc-theme-picker-bar { background: #0f172a; border-color: #475569; }
[data-theme="dark"] .twc-theme-label { color: #cbd5e1; }
[data-theme="dark"] .twc-select-sm { background: #1e293b; border-color: #475569; color: #f8fafc; }


/* =======================================================
   独立封装的精美卡片渲染引擎 (防污染)
   ======================================================= */
.twc-preview-container { width: 100%; display: flex; justify-content: center; margin-top: 20px; overflow: hidden; box-sizing: border-box; }

/* 最外层：控制背景色/渐变，导出时包含这个区域 */
.twc-export-node {
    padding: 60px; /* 大边距，留出背景 */
    border-radius: 0;
    transition: background 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 650px;
    box-sizing: border-box;
}

/* 渐变预设字典 (仅作为 fallback，实际主要用JS动态切换 inline style 保证导出) */
.twc-export-node[data-bg="gradient-1"] { background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%); }
.twc-export-node[data-bg="gradient-2"] { background: linear-gradient(120deg, #84fab0 0%, #8fd3f4 100%); }
.twc-export-node[data-bg="gradient-3"] { background: linear-gradient(120deg, #f6d365 0%, #fda085 100%); }
.twc-export-node[data-bg="gradient-4"] { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); }
.twc-export-node[data-bg="gradient-5"] { background: linear-gradient(to top, #cfd9df 0%, #e2ebf0 100%); }
.twc-export-node[data-bg="solid-dark"] { background: #1e293b; }

/* 卡片本体 */
.twc-card {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    width: 100%;
    max-width: 500px;
    border-radius: 16px;
    padding: 28px;
    box-sizing: border-box;
    box-shadow: 0 20px 40px -10px rgba(0,0,0,0.15), 0 0 0 1px rgba(255,255,255,0.2) inset;
    transition: all 0.3s ease;
    position: relative;
    
    /* 默认浅色变量 */
    --c-bg: rgba(255, 255, 255, 0.95);
    --c-text: #0f1419;
    --c-text-dim: #536471;
    --c-border: #eff3f4;
}

/* 暗黑模式卡片 (深邃毛玻璃效果) */
.twc-card[data-theme="dark"] {
    --c-bg: rgba(0, 0, 0, 0.85);
    --c-text: #e7e9ea;
    --c-text-dim: #71767b;
    --c-border: #2f3336;
    box-shadow: 0 20px 40px -10px rgba(0,0,0,0.4), 0 0 0 1px rgba(255,255,255,0.05) inset;
}

.twc-card { background-color: var(--c-bg); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }

/* macOS 视窗按钮 */
.twc-mac-dots { display: flex; gap: 8px; margin-bottom: 20px; }
.twc-mac-dots span { width: 12px; height: 12px; border-radius: 50%; display: block; }
.twc-mac-dots span:nth-child(1) { background: #ff5f56; }
.twc-mac-dots span:nth-child(2) { background: #ffbd2e; }
.twc-mac-dots span:nth-child(3) { background: #27c93f; }

/* 头部 */
.twc-card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.twc-card-header-left { display: flex; align-items: center; }
.twc-avatar { width: 48px; height: 48px; border-radius: 50%; object-fit: cover; margin-right: 12px; }
.twc-user-info { display: flex; flex-direction: column; }
.twc-name-row { display: flex; align-items: center; }
.twc-name { font-weight: 700; font-size: 16px; color: var(--c-text); line-height: 1.2; }
.twc-badge { width: 18px; height: 18px; margin-left: 4px; }
.twc-handle { color: var(--c-text-dim); font-size: 15px; margin-top: 2px; }
.twc-logo-x { width: 24px; height: 24px; color: var(--c-text); fill: currentColor; }

/* 正文 */
.twc-card-body { font-size: 22px; line-height: 1.45; color: var(--c-text); word-wrap: break-word; white-space: pre-wrap; font-weight: 400; letter-spacing: -0.01em; margin-bottom: 16px; }

/* 时间 */
.twc-card-meta { font-size: 15px; color: var(--c-text-dim); margin-bottom: 16px; display: flex; align-items: center; }
.twc-card-meta .twc-dot { margin: 0 6px; }

/* 数据统计区 */
.twc-card-stats { display: flex; gap: 24px; padding-top: 16px; border-top: 1px solid var(--c-border); }
.twc-stat { font-size: 15px; display: flex; gap: 5px; }
.twc-stat-val { font-weight: 700; color: var(--c-text); }
.twc-stat-label { color: var(--c-text-dim); }

/* ================= 移动端适配 ================= */
@media (max-width: 650px) {
    .twc-tool-wrapper { padding: 16px; }
    .twc-preview-panel { padding: 16px 0; }
    .twc-export-node { padding: 30px 16px; }
    .twc-card { padding: 20px; }
    .twc-card-body { font-size: 18px; }
    .twc-config-grid { grid-template-columns: 1fr; padding: 16px; gap: 16px; }
    .twc-config-section[style] { grid-column: span 1 !important; }
}