/* 基础样式 */
:root {
    --primary-color: #0071e3;
    --bg-color: #f5f5f7;
    --panel-bg: #ffffff;
    --text-color: #1d1d1f;
    --border-color: #d2d2d7;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Noto Sans SC', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    height: 100vh;
    overflow: hidden;
    font-size: 14px;
}

/* 主布局 */
.app-container {
    display: grid;
    grid-template-columns: minmax(320px, 380px) 1fr;
    grid-template-rows: auto;
    gap: 1rem;
    width: 100vw;
    height: 100vh;
}

/* 预览区域 */
.preview-section {
    width: 380px;
    height: 100%;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #f8f8f8;
    border-right: 1px solid var(--border-color);
    overflow: auto;
}

.preview-container {
    width: 100%;
    max-width: 350px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.preview-area {
    position: relative;
    width: 100%;
    aspect-ratio: 9/16;
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

.cover-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: var(--primary-color);
}

.safe-area {
    position: absolute;
    aspect-ratio: 3 / 4;
    width: min(694px, 90%);
    height: auto;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1.5rem;
}

.safe-area-3-4 {
    position: absolute;
    inset: 0;
    border: 1px dashed rgba(255, 255, 255, 0.5);
    pointer-events: none;
}

.cover-content {
    position: absolute;
    top: 6%;
    left: 6%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    max-width: calc(100% - 2rem);
    max-height: calc(100% - 2rem);
    overflow-wrap: break-word;
    word-break: break-word;
    white-space: normal;
    box-sizing: border-box;
    padding: 0.5rem;
}

.main-title {
    font-size: 48px;
    font-weight: 600;
    color: white;
    margin-bottom: 0.5rem;
    text-align: left;
    line-height: 1.2;
    transition: all 0.3s ease;
}

.sub-title {
    font-size: 24px;
    font-weight: 400;
    color: white;
    margin-top: 0.309rem;
    text-align: left;
    line-height: 1.4;
    transition: all 0.3s ease;
}

.decoration-line {
    height: 3px;
    width: 60%;
    background-color: white;
    margin: 0.75rem 0;
    border-radius: 3px;
    align-self: flex-start;
    transition: all 0.3s ease;
    position: relative;
}

.cover-icon {
    position: absolute;
    left: 0;
    top: 0;
    width: 50px;
    height: 50px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.download-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: 24px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-top: 0.5rem;
    width: 100%;
}

.download-btn:hover {
    background-color: #0062c4;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(0, 113, 227, 0.3);
}

/* 控制区域 */
.control-section {
    flex: 1;
    height: 100%;
    padding: 1rem;
    background-color: var(--panel-bg);
    overflow-y: auto;
}

.control-panel {
    margin-bottom: 1rem;
    background-color: white;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}

.control-panel h3 {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.control-row {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.control-group {
    margin-bottom: 0.75rem;
    flex: 1;
}

.control-group.half-width {
    flex: 0.5;
}

.control-group label {
    display: block;
    margin-bottom: 0.3rem;
    font-size: 0.85rem;
    color: #86868b;
}

.control-group input[type="text"],
.control-group select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.85rem;
}

.control-group input[type="color"] {
    width: 100%;
    height: 32px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    padding: 0;
}

.control-group input[type="range"] {
    appearance: none;
    width: 100%;
    margin-top: 0.25rem;
}

.range-value {
    display: inline-block;
    font-size: 0.8rem;
    color: #86868b;
    margin-left: 0.5rem;
}

.control-group button {
    width: 100%;
    padding: 0.6rem;
    background-color: #f5f5f7;
    border: none;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
}

.control-group button:hover {
    background-color: #e5e5ea;
}

/* 背景元素样式 */
.bg-element {
    position: absolute;
    pointer-events: none;
    transition: all 1s ease-out;
}

/* 动画效果 */
@keyframes float {
    0% { transform: translateY(0) rotate(0deg) scale(1); }
    50% { transform: translateY(-10px) rotate(3deg) scale(1.03); }
    100% { transform: translateY(0) rotate(0deg) scale(1); }
}

@keyframes pulse {
    0% { opacity: 0.1; }
    50% { opacity: 0.3; }
    100% { opacity: 0.1; }
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 几何形状动画 */
.bg-element.circle {
    animation: float 8s infinite ease-in-out;
}

.bg-element.triangle {
    animation: float 12s infinite ease-in-out;
}

.bg-element.square {
    animation: pulse 6s infinite ease-in-out;
}

.bg-element.blob {
    animation: float 15s infinite ease-in-out, rotate 60s infinite linear;
}

/* 线条动画 */
.bg-element.line {
    animation: float 10s infinite ease-in-out alternate;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .app-container {
        flex-direction: column;
    }
    
    .preview-section {
        width: 100%;
        height: auto;
        padding: 0.75rem;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .control-section {
        width: 100%;
        height: auto;
    }
    
    .preview-area {
        max-width: 300px;
    }
}

/* 装饰线动画 */
.decoration-line::after {
    display: none !important;
}

/* 上传按钮样式 */
.control-group input[type="file"] {
    width: 100%;
    padding: 0.5rem;
    border: 1px dashed var(--border-color);
    border-radius: 6px;
    font-size: 0.85rem;
    background-color: #f9f9f9;
}

.control-group input[type="file"]::file-selector-button {
    padding: 0.4rem 0.75rem;
    background-color: #f5f5f7;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
    margin-right: 0.5rem;
}

.control-group input[type="file"]::file-selector-button:hover {
    background-color: #e5e5ea;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* 颜色输入框样式 */
input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

/* 优化输入框聚焦状态 */
input:focus,
select:focus,
button:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(0, 113, 227, 0.2);
}

/* 控制面板标题优化 */
.control-panel h3 {
    position: relative;
    padding-bottom: 0.5rem;
}

.control-panel h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, var(--border-color), transparent);
}

/* 范围输入样式优化 */
input[type="range"] {
    appearance: none;
    height: 6px;
    background: #e0e0e0;
    border-radius: 3px;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
}

/* 下拉菜单箭头样式 */
select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1rem;
}

/* 按钮悬停效果增强 */
.download-btn:hover,
.control-group button:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* 元素过渡效果 */
.cover-bg,
.main-title,
.sub-title,
.decoration-line,
.cover-icon {
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* 移动端优化 */
@media (max-width: 768px) {
    .control-row {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .control-group.half-width {
        flex: 1;
    }
    
    .preview-section {
        width: 100%;
        padding: 0.5rem;
    }
    
    .preview-area {
        max-width: 280px;
    }
    
    .main-title {
        font-size: 36px;
    }
    
    .sub-title {
        font-size: 18px;
    }
}

/* 禁止文本选择 */
.preview-area,
input,
select,
button {
    user-select: none;
}

/* 安全区域尺寸调整为固定的 694x926，并居中 */
.safe-area {
    position: absolute;
    aspect-ratio: 3 / 4;
    width: min(694px, 100%);
    height: auto;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 1.5rem;
}
  
/* 安全区域虚线边框 */
.safe-area-3-4 {
    position: absolute;
    inset: 0;
    border: 1px dashed rgba(255, 255, 255, 0.5);
    pointer-events: none;
}
  
.btn-action {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: 24px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
}

.btn-action:hover {
    background-color: #0062c4;
    transform: translateY(-1px);
    box-shadow: 0 3px 8px rgba(0, 113, 227, 0.3);
}

/* 新增渐变颜色列表样式 */
#gradientColorList input[type="color"] {
  flex: 0 0 auto;
  width: 40px;
  height: 32px;
  padding: 0;
  border-radius: 4px;
}

#gradientColorList {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.form-grid {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 0.75rem 1rem;
    align-items: center;
}

.form-grid h3 {
    grid-column: 1 / -1;
    margin-bottom: 1rem;
}

@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
    }
}

/* 背景设置模块样式优化 */
#gradientControls {
  border-top: 1px solid var(--border-color);
  padding-top: 1rem;
  margin-top: 1rem;
}

#gradientColorList {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

#gradientColorList input[type="color"] {
  flex: 0 0 auto;
  width: 40px;
  height: 32px;
  padding: 0;
  border-radius: 4px;
  border: 1px solid var(--border-color);
}

#matrixUpload {
  margin-top: 0.5rem;
}

/* 背景类型、背景元素分区的 label checkbox/radio 样式微调 */
.control-group input[type="radio"],
.control-group input[type="checkbox"] {
  margin-right: 0.4rem;
  transform: translateY(1px);
}

/* 背景设置中颜色选择按钮统一样式 */
.control-group button {
  margin-top: 0.5rem;
}

/* 控制面板中不同类型设置分隔线 */
.control-group + .control-group {
  border-top: 1px dashed #eee;
  padding-top: 1rem;
}

/* 渐变颜色列表中每一个色块容器 */
.gradient-color-item {
  position: relative;
  display: inline-flex;
  align-items: center;
  transition: transform 0.2s ease;
}

.gradient-color-item .delete-color-btn {
  position: absolute;
  top: -4px;
  right: -4px;
  background: rgba(255, 59, 48, 0.85); /* 红色 + 半透明 */
  color: white;
  font-size: 10px;
  width: 10px;
  height: 10px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  line-height: 1;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
  transition: background 0.2s ease;
}

.gradient-color-item .delete-color-btn:hover {
  background-color: rgba(220, 50, 40, 0.95);
}

/* 拖拽排序的视觉提示 */
#gradientColorList.drag-over .gradient-color-item {
  opacity: 0.6;
  transform: scale(0.95);
  transition: all 0.2s ease;
}
# 添加拖动时的动画交互
.gradient-color-item.dragging {
  opacity: 0.7;
  transform: scale(1.1);
  transition: transform 0.2s ease, opacity 0.2s ease;
}