/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4A90E2;
    --secondary-color: #7B68EE;
    --bg-color: #F5F7FA;
    --panel-bg: #FFFFFF;
    --text-color: #333333;
    --border-color: #E1E8ED;
    --hover-color: #F0F4F8;
    --active-color: #E3F2FD;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* 顶部导航栏 */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
}

.logo i {
    font-size: 1.8rem;
}

.logo small {
    font-size: 0.8rem;
    opacity: 0.8;
    font-weight: normal;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background 0.3s;
}

.nav a:hover, .nav a.active {
    background: rgba(255,255,255,0.2);
}

.header-actions {
    display: flex;
    gap: 1rem;
}

.btn-icon {
    background: rgba(255,255,255,0.2);
    border: none;
    color: white;
    padding: 0.5rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: rgba(255,255,255,0.3);
}

/* 主容器 */
.container {
    display: flex;
    height: calc(100vh - 140px);
    overflow: hidden;
}

/* 左侧控制面板 */
.control-panel {
    width: 350px;
    background: var(--panel-bg);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 1.5rem;
    box-shadow: 2px 0 10px rgba(0,0,0,0.05);
}

.search-box {
    position: relative;
    margin-bottom: 1.5rem;
}

.search-box input {
    width: 100%;
    padding: 0.8rem 1rem 0.8rem 2.5rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.95rem;
    transition: border-color 0.3s;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
}

/* 模板分类 */
.template-categories {
    margin-bottom: 2rem;
}

.template-categories h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.category-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.5rem 1rem;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9rem;
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.template-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
}

.template-item {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    background: white;
}

.template-item:hover {
    border-color: var(--primary-color);
    background: var(--hover-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.template-item.active {
    border-color: var(--primary-color);
    background: var(--active-color);
    box-shadow: 0 4px 8px rgba(74,144,226,0.2);
}

.template-item i {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.template-item span {
    font-size: 0.85rem;
    display: block;
}

/* 模板预览容器 */
.template-preview {
    width: 100%;
    height: 60px;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    background-size: 20px 20px;
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
}

/* 横线纸预览 */
#preview-lined {
    background-image: linear-gradient(to bottom, transparent 0%, transparent 40%, #4A90E2 40%, #4A90E2 42%, transparent 42%);
    background-size: 100% 16px;
}

/* 方格纸预览 */
#preview-grid {
    background-image: 
        linear-gradient(to right, #4A90E2 1px, transparent 1px),
        linear-gradient(to bottom, #4A90E2 1px, transparent 1px);
    background-size: 16px 16px;
}

/* 点阵纸预览 */
#preview-dot {
    background-image: radial-gradient(circle, #4A90E2 2px, transparent 2px);
    background-size: 16px 16px;
}

/* 空白纸预览 */
#preview-blank {
    background-image: none;
    background-color: #f9f9f9;
}

/* 乐谱纸预览 */
#preview-music {
    background-image: linear-gradient(to bottom, transparent 0%, transparent 19%, #4A90E2 19%, #4A90E2 21%, transparent 21%, transparent 39%, #4A90E2 39%, #4A90E2 41%, transparent 41%, transparent 59%, #4A90E2 59%, #4A90E2 61%, transparent 61%, transparent 79%, #4A90E2 79%, #4A90E2 81%, transparent 81%);
    background-size: 100% 80px;
}

/* 康奈尔笔记预览 */
#preview-cornell {
    background-image: 
        linear-gradient(to right, transparent 0%, transparent 29%, #4A90E2 29%, #4A90E2 30%, transparent 30%),
        linear-gradient(to bottom, transparent 0%, transparent 40%, #4A90E2 40%, #4A90E2 42%, transparent 42%);
    background-size: 100% 16px;
}

/* 拼音田字格预览 */
#preview-tiange {
    background-image: 
        linear-gradient(to right, #4A90E2 1px, transparent 1px),
        linear-gradient(to bottom, #4A90E2 1px, transparent 1px),
        linear-gradient(to right, transparent 0%, transparent 49%, #4A90E2 49%, #4A90E2 51%, transparent 51%),
        linear-gradient(to bottom, transparent 0%, transparent 49%, #4A90E2 49%, #4A90E2 51%, transparent 51%);
    background-size: 16px 16px;
}

/* 米字格预览 */
#preview-mizige {
    background-image: 
        linear-gradient(to right, #4A90E2 1px, transparent 1px),
        linear-gradient(to bottom, #4A90E2 1px, transparent 1px),
        linear-gradient(45deg, transparent 0%, transparent 49%, #4A90E2 49%, #4A90E2 51%, transparent 51%),
        linear-gradient(-45deg, transparent 0%, transparent 49%, #4A90E2 49%, #4A90E2 51%, transparent 51%);
    background-size: 16px 16px;
}

/* 拼音田字格预览 */
#preview-pinyin {
    background-image: 
        linear-gradient(to right, #4A90E2 1px, transparent 1px),
        linear-gradient(to bottom, #4A90E2 1px, transparent 1px);
    background-size: 16px 16px;
}

/* 作文纸预览 */
#preview-composition {
    background-image: linear-gradient(to bottom, transparent 0%, transparent 40%, #4A90E2 40%, #4A90E2 42%, transparent 42%);
    background-size: 100% 20px;
}

/* 算术纸预览 */
#preview-arithmetic {
    background-image: 
        linear-gradient(to right, #4A90E2 1px, transparent 1px),
        linear-gradient(to bottom, #4A90E2 1px, transparent 1px);
    background-size: 20px 24px;
}

/* 回宫格预览 */
#preview-huigongge {
    background-image: 
        linear-gradient(to right, #4A90E2 1px, transparent 1px),
        linear-gradient(to bottom, #4A90E2 1px, transparent 1px),
        linear-gradient(to right, transparent 0%, transparent 30%, #4A90E2 30%, #4A90E2 32%, transparent 32%, transparent 68%, #4A90E2 68%, #4A90E2 70%, transparent 70%),
        linear-gradient(to bottom, transparent 0%, transparent 30%, #4A90E2 30%, #4A90E2 32%, transparent 32%, transparent 68%, #4A90E2 68%, #4A90E2 70%, transparent 70%);
    background-size: 16px 16px;
}

/* 九宫格预览 */
#preview-jiugongge {
    background-image: 
        linear-gradient(to right, #4A90E2 1px, transparent 1px),
        linear-gradient(to bottom, #4A90E2 1px, transparent 1px),
        linear-gradient(to right, transparent 0%, transparent 32%, #4A90E2 32%, #4A90E2 34%, transparent 34%, transparent 65%, #4A90E2 65%, #4A90E2 67%, transparent 67%),
        linear-gradient(to bottom, transparent 0%, transparent 32%, #4A90E2 32%, #4A90E2 34%, transparent 34%, transparent 65%, #4A90E2 65%, #4A90E2 67%, transparent 67%);
    background-size: 16px 16px;
}

/* 复古笔记纸预览 */
#preview-retro {
    background-color: #f5e6d3;
    background-image: linear-gradient(to bottom, transparent 0%, transparent 40%, #8b4513 40%, #8b4513 42%, transparent 42%);
    background-size: 100% 24px;
}

/* 儿童涂鸦纸预览 */
#preview-doodle {
    background-image: 
        radial-gradient(circle at 20% 30%, #ff6b6b33 10px, transparent 10px),
        radial-gradient(circle at 60% 60%, #4ecdc433 15px, transparent 15px),
        radial-gradient(circle at 80% 20%, #ffe66d33 12px, transparent 12px);
}

/* 项目规划纸预览 */
#preview-planner {
    background-image: 
        linear-gradient(to bottom, transparent 0%, transparent 24%, #4A90E2 24%, #4A90E2 26%, transparent 26%),
        linear-gradient(to right, #e0e0e0 1px, transparent 1px);
    background-size: 100% 30px, 100px 100%;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 2rem 1rem;
    color: #999;
}

.empty-state i {
    font-size: 2rem;
    display: block;
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.empty-state p {
    margin: 0.5rem 0;
    font-weight: 500;
}

.empty-state small {
    display: block;
    margin-top: 0.3rem;
    opacity: 0.7;
}

/* 最近使用模板项 */
.recent-item {
    padding: 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    background: white;
    margin-bottom: 0.5rem;
}

.recent-item:hover {
    border-color: var(--primary-color);
    background: var(--hover-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.recent-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.3rem;
}

.recent-item-name {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--primary-color);
}

.recent-item-time {
    font-size: 0.75rem;
    color: #999;
}

.recent-item-preview {
    font-size: 0.8rem;
    color: #666;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.recent-item-preview span {
    background: var(--bg-color);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-size: 0.75rem;
}

/* 设置区域 */
.settings-section {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.settings-section h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.setting-group {
    margin-bottom: 1.2rem;
}

.setting-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.95rem;
}

.value-display {
    color: var(--primary-color);
    font-weight: bold;
    font-size: 0.9rem;
}

.setting-group select,
.setting-group input[type="number"],
.setting-group input[type="color"] {
    width: 100%;
    padding: 0.6rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 0.95rem;
    transition: border-color 0.3s;
}

.setting-group select:focus,
.setting-group input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.setting-group input[type="color"] {
    height: 45px;
    cursor: pointer;
}

.size-inputs {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.size-inputs input {
    flex: 1;
}

.size-inputs span {
    font-weight: bold;
}

/* 滑块容器 */
.slider-container {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.slider-container input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
    background: var(--border-color);
}

.slider-container input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.slider-container input[type="number"] {
    width: 70px;
    padding: 0.5rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    text-align: center;
}

/* 快捷操作 */
.quick-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem;
    margin-top: 2rem;
}

.btn-action {
    padding: 0.8rem 0.5rem;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.85rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
}

.btn-action:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--hover-color);
}

.btn-action i {
    font-size: 1.2rem;
}

/* 右侧预览区域 */
.preview-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-color);
    overflow: hidden;
}

.preview-toolbar {
    background: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.zoom-controls,
.page-nav {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.zoom-controls button,
.page-nav button {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.zoom-controls button:hover,
.page-nav button:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

#zoomLevel,
#currentPage,
#totalPages {
    font-weight: bold;
    min-width: 50px;
    text-align: center;
}

.export-buttons {
    display: flex;
    gap: 0.8rem;
}

.btn-export {
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--primary-color);
    background: white;
    color: var(--primary-color);
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-export:hover {
    background: var(--primary-color);
    color: white;
}

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

.btn-export.primary:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
}

/* 预览容器 */
.preview-container {
    flex: 1;
    overflow: auto;
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.paper-preview {
    background: white;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    transition: transform 0.3s;
}

#paperCanvas {
    display: block;
}

/* 底部信息区 */
.footer {
    background: white;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
}

.tips {
    max-width: 800px;
    margin: 0 auto 1rem;
}

.tips h4 {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
}

.tips ul {
    list-style: none;
}

.tips li {
    padding: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tips li i {
    color: #4CAF50;
}

.footer-info {
    text-align: center;
    color: #999;
    font-size: 0.9rem;
}

.footer-info p {
    margin: 0.3rem 0;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .container {
        flex-direction: column;
        height: auto;
    }

    .control-panel {
        width: 100%;
        max-height: 60vh;
    }

    .preview-area {
        min-height: 50vh;
    }
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .nav {
        gap: 0.5rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav a {
        padding: 0.5rem 0.8rem;
        font-size: 0.9rem;
    }

    .header-actions {
        justify-content: center;
    }

    .template-list {
        grid-template-columns: repeat(2, 1fr);
    }

    .template-item {
        padding: 0.8rem 0.5rem;
    }

    .template-item i {
        font-size: 1.2rem;
    }

    .template-item span {
        font-size: 0.8rem;
    }

    .quick-actions {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }

    .btn-action {
        padding: 0.6rem 0.3rem;
        font-size: 0.8rem;
    }

    .preview-toolbar {
        flex-direction: column;
        gap: 0.8rem;
        padding: 0.8rem;
    }

    .zoom-controls,
    .page-nav,
    .export-buttons {
        justify-content: center;
    }

    .export-buttons {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .btn-export {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }

    .setting-group {
        margin-bottom: 1rem;
    }

    .slider-container {
        gap: 0.5rem;
    }

    .slider-container input[type="number"] {
        width: 60px;
        padding: 0.4rem;
    }
}

@media (max-width: 480px) {
    .template-list {
        grid-template-columns: 1fr;
    }

    .category-tabs {
        gap: 0.3rem;
    }

    .tab-btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }

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

    .btn-action {
        flex-direction: row;
        justify-content: center;
        gap: 0.5rem;
    }

    .btn-action i {
        font-size: 1rem;
    }

    .preview-container {
        padding: 1rem;
    }

    .footer {
        padding: 1rem;
    }

    .tips {
        padding: 0 1rem;
    }
}

/* 滚动条样式 */
.control-panel::-webkit-scrollbar,
.preview-container::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.control-panel::-webkit-scrollbar-track,
.preview-container::-webkit-scrollbar-track {
    background: var(--bg-color);
}

.control-panel::-webkit-scrollbar-thumb,
.preview-container::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.control-panel::-webkit-scrollbar-thumb:hover,
.preview-container::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.template-item,
.setting-group {
    animation: fadeIn 0.3s ease-out;
}

/* 新手引导样式 */
.guide-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 10000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.guide-highlight {
    position: absolute;
    border: 3px solid var(--primary-color);
    background: rgba(74, 144, 226, 0.1);
    border-radius: 8px;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.7);
    z-index: 10001;
    transition: all 0.3s ease-out;
}

.guide-tooltip {
    position: absolute;
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    max-width: 400px;
    z-index: 10002;
    animation: guideFadeIn 0.3s ease-out;
}

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

.guide-step {
    font-size: 0.85rem;
    color: #999;
    margin-bottom: 0.5rem;
}

.guide-tooltip h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
}

.guide-tooltip p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #333;
    margin-bottom: 1.2rem;
}

.guide-buttons {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.btn-guide {
    padding: 0.6rem 1.5rem;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9rem;
}

.btn-guide:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-guide.primary {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-guide.primary:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
}

.preset-section {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 8px;
    border: 2px solid var(--primary-color);
}

.preset-section h4 {
    font-size: 1rem;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.preset-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.btn-preset {
    padding: 0.5rem 1rem;
    border: 2px solid var(--primary-color);
    background: white;
    color: var(--primary-color);
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.85rem;
    font-weight: 500;
}

.btn-preset:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(74, 144, 226, 0.3);
}

/* 打印样式 */
@media print {
    .header, .control-panel, .footer, .preview-toolbar, .guide-overlay {
        display: none !important;
    }

    .container {
        display: block;
        height: auto;
        overflow: visible;
    }

    .preview-area {
        display: block;
        overflow: visible;
    }

    .preview-container {
        padding: 0;
        overflow: visible;
    }

    .paper-preview {
        box-shadow: none;
        margin: 0 auto;
    }

    #paperCanvas {
        max-width: 100%;
        height: auto;
    }

    @page {
        margin: 0;
        size: auto;
    }
}