.fp-tool-wrapper { --p-bg: #ffffff; --p-border: #e2e8f0; --p-primary: #8b5cf6; --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; }
.fp-header-main { font-size: 1.6rem; font-weight: 800; color: var(--p-text); margin-bottom: 8px; text-align: center; }
.fp-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 */
.fp-layout { display: flex; flex-direction: column; gap: 24px; }
.fp-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; }
.fp-preview-panel { background: #e2e8f0; padding: 24px; display: flex; align-items: center; justify-content: flex-start; flex-direction: column; box-sizing: border-box; }
.fp-panel-title { font-size: 1.05rem; font-weight: 700; color: #334155; padding: 20px; border-bottom: 1px solid var(--p-border); background: #ffffff; margin: 0; }
.fp-preview-panel .fp-panel-title { background: transparent; border-bottom: none; }

.fp-canvas-controls { display: flex; gap: 12px; }
.fp-select-sm { padding: 8px 12px; border-radius: 8px; border: 1px solid #cbd5e1; background: #ffffff; color: #0f172a; font-size: 0.85rem; outline: none; font-weight: 600; cursor: pointer; transition: 0.2s; }
.fp-select-sm:focus { border-color: var(--p-primary); }

/* 配置区网格 */
.fp-config-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 24px; padding: 24px; box-sizing: border-box; }
.fp-config-section { display: flex; flex-direction: column; border-bottom: 1px dashed #cbd5e1; padding-bottom: 24px; }
.fp-config-section:last-child { border-bottom: none; padding-bottom: 0; }
.fp-section-title { font-size: 0.95rem; font-weight: 700; color: #475569; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }

/* 预设搭配 */
.fp-presets-wrap { padding: 20px 24px 0 24px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.fp-presets-list { display: flex; gap: 10px; flex-wrap: wrap; }
.fp-preset-btn { background: #ffffff; border: 1px solid #cbd5e1; padding: 6px 12px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; color: #475569; cursor: pointer; transition: 0.2s; }
.fp-preset-btn:hover { border-color: var(--p-primary); color: var(--p-primary); background: #f5f3ff; }

/* 表单元素 */
.fp-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 12px; }
.fp-form-group { display: flex; flex-direction: column; margin-bottom: 12px; }
.fp-label { font-size: 0.85rem; font-weight: 600; color: #64748b; margin-bottom: 8px; }
.fp-input, .fp-select { 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; }
.fp-input:focus, .fp-select:focus { border-color: var(--p-primary); box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15); }

/* 滑块 Range */
.fp-range { -webkit-appearance: none; width: 100%; height: 6px; background: #e2e8f0; border-radius: 3px; outline: none; margin: 10px 0; }
.fp-range::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 18px; height: 18px; border-radius: 50%; background: var(--p-primary); cursor: pointer; transition: 0.2s; }
.fp-range::-webkit-slider-thumb:hover { transform: scale(1.15); }

/* 代码导出区 */
.fp-code-box { width: 100%; min-height: 180px; padding: 16px; border-radius: 12px; border: 1px solid #cbd5e1; background: #1e293b; color: #e2e8f0; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 0.9rem; line-height: 1.5; outline: none; resize: vertical; box-sizing: border-box; }
.fp-btn-sm { padding: 6px 12px; font-size: 0.85rem; border-radius: 6px; cursor: pointer; transition: 0.2s; font-weight: 600; }
.fp-btn-outline { background: transparent; border: 1px solid var(--p-primary); color: var(--p-primary); }
.fp-btn-outline:hover { background: var(--p-primary); color: #ffffff; }

/* ================= 黑夜模式适配 ================= */
[data-theme="dark"] .fp-tool-wrapper { background: #1e293b; border-color: #334155; }
[data-theme="dark"] .fp-header-main, [data-theme="dark"] .fp-panel-title { color: #f8fafc; }
[data-theme="dark"] .fp-panel { background: #0f172a; border-color: #475569; }
[data-theme="dark"] .fp-panel-title { background: #1e293b; border-bottom-color: #475569; }
[data-theme="dark"] .fp-preview-panel { background: #020617; }
[data-theme="dark"] .fp-section-title { border-bottom-color: #334155; }
[data-theme="dark"] .fp-label { color: #cbd5e1; }
[data-theme="dark"] .fp-input, [data-theme="dark"] .fp-select { background: #020617; border-color: #475569; color: #f8fafc; }
[data-theme="dark"] .fp-select-sm { background: #1e293b; border-color: #475569; color: #f8fafc; }
[data-theme="dark"] .fp-preset-btn { background: #1e293b; border-color: #475569; color: #cbd5e1; }
[data-theme="dark"] .fp-preset-btn:hover { border-color: var(--p-primary); color: var(--p-primary); background: rgba(139, 92, 246, 0.1); }
[data-theme="dark"] .fp-range { background: #334155; }


/* =======================================================
   独立封装的排版画板 (隔离 CSS 以免受系统影响)
   ======================================================= */
.fp-preview-container { width: 100%; display: flex; justify-content: center; margin-top: 20px; overflow: hidden; box-sizing: border-box; }

.fp-canvas {
    width: 100%;
    max-width: 800px;
    background-color: var(--cv-bg);
    border: 1px solid var(--cv-border);
    border-radius: 16px;
    padding: 60px 80px;
    box-sizing: border-box;
    box-shadow: 0 20px 40px -10px rgba(0,0,0,0.1);
    transition: background-color 0.3s ease;
    
    /* 默认浅色变量 */
    --cv-bg: #ffffff;
    --cv-text: #111827;
    --cv-text-dim: #4b5563;
    --cv-border: #e5e7eb;
    --cv-primary: #3b82f6;
    --cv-quote-bg: #f3f4f6;
}

.fp-canvas[data-theme="dark"] {
    --cv-bg: #111827;
    --cv-text: #f9fafb;
    --cv-text-dim: #9ca3af;
    --cv-border: #374151;
    --cv-primary: #60a5fa;
    --cv-quote-bg: #1f2937;
    box-shadow: 0 20px 40px -10px rgba(0,0,0,0.5);
}

/* 这些元素的具体字号、字重受 JS 行内样式控制，这里只提供基础排版与色彩 */
.fp-tag { display: inline-block; font-size: 13px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--cv-primary); margin-bottom: 16px; }

.fp-h1 { color: var(--cv-text); margin: 0 0 24px 0; letter-spacing: -0.02em; }
.fp-h2 { color: var(--cv-text); margin: 40px 0 16px 0; letter-spacing: -0.01em; }

.fp-p { color: var(--cv-text-dim); margin: 0 0 24px 0; }

.fp-quote { font-style: italic; color: var(--cv-text); padding: 24px 32px; margin: 32px 0; background: var(--cv-quote-bg); border-left: 4px solid var(--cv-primary); border-radius: 0 8px 8px 0; }

.fp-button { background: var(--cv-text); color: var(--cv-bg); border: none; padding: 14px 28px; border-radius: 8px; cursor: pointer; transition: 0.2s; margin-top: 16px; }
.fp-button:hover { opacity: 0.8; transform: translateY(-1px); }

/* 对齐辅助 */
.fp-canvas[style*="text-align: center;"] .fp-quote { border-left: none; border-bottom: 4px solid var(--cv-primary); border-radius: 8px; }

@media (max-width: 650px) {
    .fp-tool-wrapper { padding: 16px; }
    .fp-preview-panel { padding: 16px 12px; }
    .fp-canvas { padding: 40px 24px; border-radius: 12px; }
    .fp-config-grid { grid-template-columns: 1fr; padding: 16px; }
    .fp-form-row { grid-template-columns: 1fr; }
    .fp-config-section[style] { grid-column: span 1 !important; }
}