/* ========== CSS变量 ========== */
:root {
    --primary: #667eea;
    --primary-dark: #764ba2;
    --secondary: #f093fb;
    --dark: #1a1a2e;
    --darker: #0f0f1e;
    --light: #ffffff;
    --gray: #888888;
    --border: rgba(255,255,255,0.1);
    --panel-width: 420px;
    --header-height: 70px;
}

/* ========== 基础样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--darker);
    color: var(--light);
    overflow: hidden;
    height: 100vh;
}

/* ========== 顶部导航 ========== */
.header {
    height: var(--header-height);
    background: linear-gradient(135deg, var(--dark) 0%, #2d2d5a 100%);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 25px;
    border-bottom: 1px solid var(--border);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8em;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.brand h1 {
    font-size: 1.4em;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand h1 .version {
    font-size: 0.5em;
    color: var(--primary);
    -webkit-text-fill-color: var(--primary);
}

.brand span {
    font-size: 0.75em;
    color: var(--gray);
    display: block;
    margin-top: 2px;
}

/* 模式切换 */
.mode-switcher {
    display: flex;
    gap: 8px;
    background: rgba(255,255,255,0.05);
    padding: 5px;
    border-radius: 10px;
}

.mode-btn {
    padding: 10px 20px;
    border: none;
    background: transparent;
    color: var(--gray);
    cursor: pointer;
    border-radius: 8px;
    font-size: 0.9em;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.mode-btn:hover {
    color: var(--light);
    background: rgba(255,255,255,0.1);
}

.mode-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--light);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.badge {
    background: #ff6b6b;
    color: white;
    font-size: 0.7em;
    padding: 2px 6px;
    border-radius: 10px;
    margin-left: 5px;
}

/* 头部按钮 */
.header-right {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9em;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-secondary {
    background: rgba(255,255,255,0.1);
    color: var(--light);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.2);
}

/* ========== 主体布局 ========== */
.main-container {
    display: flex;
    height: calc(100vh - var(--header-height));
}

/* ========== 左侧面板 ========== */
.left-panel {
    width: var(--panel-width);
    background: var(--dark);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* 标签页导航 */
.tabs-nav {
    display: flex;
    background: rgba(0,0,0,0.2);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
    scrollbar-width: none;
}

.tabs-nav::-webkit-scrollbar {
    display: none;
}

.tab-btn {
    flex: 1;
    padding: 15px 10px;
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    font-size: 0.85em;
    transition: all 0.3s;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--light);
    background: rgba(255,255,255,0.05);
}

.tab-btn.active {
    color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20%;
    right: 20%;
    height: 3px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 2px;
}

/* 标签内容区 */
.tab-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* ========== 表单样式 ========== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9em;
    color: var(--gray);
    display: flex;
    align-items: center;
    gap: 6px;
}

.form-row {
    display: flex;
    gap: 15px;
}

.form-group.half {
    flex: 1;
}

input[type="text"],
input[type="color"],
textarea,
select {
    width: 100%;
    padding: 12px 15px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--light);
    font-size: 0.95em;
    transition: all 0.3s;
}

input[type="text"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.05);
}

input[type="color"] {
    height: 45px;
    cursor: pointer;
    padding: 5px;
}

textarea {
    min-height: 80px;
    resize: vertical;
    line-height: 1.6;
}

/* 滑块 */
.slider {
    width: 100%;
    -webkit-appearance: none;
    height: 6px;
    border-radius: 3px;
    background: rgba(255,255,255,0.1);
    outline: none;
    margin-top: 10px;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(102, 126, 234, 0.4);
}

/* 高亮提示 */
.highlight-tip {
    margin-top: 15px;
    background: rgba(102, 126, 234, 0.1);
    padding: 10px;
    border-radius: 8px;
    border-left: 3px solid var(--primary);
}

.highlight-tip small {
    color: var(--primary);
}

/* ========== 尺寸选择网格 ========== */
.size-grid-v2 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.size-item-v2 {
    background: rgba(255,255,255,0.05);
    border: 2px solid transparent;
    border-radius: 10px;
    padding: 12px 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.size-item-v2:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--primary);
}

.size-item-v2.active {
    background: rgba(102, 126, 234, 0.15);
    border-color: var(--primary);
}

.size-preview {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 3px;
}

.size-item-v2 span {
    font-size: 0.8em;
    font-weight: 500;
}

.size-item-v2 small {
    font-size: 0.65em;
    color: var(--gray);
}

/* ========== 模板网格 ========== */
.template-grid-v2 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.template-item-v2 {
    aspect-ratio: 3/4;
    background: rgba(255,255,255,0.05);
    border: 2px solid transparent;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.template-item-v2:hover {
    transform: translateY(-3px);
    border-color: var(--primary);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.template-item-v2.selected {
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(102, 126, 234, 0.5);
}

.template-item-v2.selected::after {
    content: '✓';
    position: absolute;
    top: 5px;
    right: 5px;
    width: 22px;
    height: 22px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8em;
    z-index: 10;
}

/* ========== 背景类型选择 ========== */
.bg-type-selector {
    display: flex;
    gap: 10px;
}

.bg-type-btn {
    flex: 1;
    padding: 12px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--gray);
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9em;
}

.bg-type-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--light);
}

.bg-type-btn.active {
    background: rgba(102, 126, 234, 0.2);
    border-color: var(--primary);
    color: var(--primary);
}

/* 渐变方向 */
.gradient-dir {
    display: flex;
    gap: 8px;
}

.gradient-dir button {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--light);
    font-size: 1.2em;
    cursor: pointer;
    transition: all 0.3s;
}

.gradient-dir button:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: var(--primary);
}

/* 装饰元素列表 */
.decoration-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.deco-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    background: rgba(255,255,255,0.05);
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.deco-item:hover {
    background: rgba(255,255,255,0.1);
}

.deco-item.active {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.deco-icon {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 6px;
    font-size: 1.1em;
}

.deco-item span {
    font-weight: 500;
    flex: 1;
}

.deco-item small {
    font-size: 0.75em;
    color: var(--gray);
}

/* ========== Logo选择器 ========== */
.logo-selector-v2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.logo-option-v2 {
    background: rgba(255,255,255,0.05);
    border: 2px solid transparent;
    border-radius: 10px;
    padding: 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.logo-option-v2:hover {
    background: rgba(255,255,255,0.1);
}

.logo-option-v2.active {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.logo-thumb {
    width: 60px;
    height: 60px;
    margin: 0 auto 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    overflow: hidden;
}

.logo-thumb img {
    max-width: 85%;
    max-height: 85%;
    object-fit: contain;
}

.logo-thumb.upload {
    font-size: 1.5em;
    color: var(--gray);
}

.logo-option-v2 span {
    font-size: 0.8em;
}

/* ========== 颜色模式选择器 ========== */
.color-mode-selector {
    display: flex;
    gap: 10px;
}

.color-mode {
    flex: 1;
    text-align: center;
    cursor: pointer;
}

.mode-preview {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    margin: 0 auto 5px;
    border: 2px solid transparent;
    transition: all 0.3s;
}

.color-mode.active .mode-preview {
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.5);
}

.color-mode span {
    font-size: 0.75em;
    color: var(--gray);
}

/* ========== 九宫格位置选择器 ========== */
.position-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    width: 180px;
    margin: 0 auto;
}

.pos-cell {
    aspect-ratio: 1;
    background: rgba(255,255,255,0.1);
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.pos-cell:hover {
    background: rgba(102, 126, 234, 0.2);
    border-color: var(--primary);
}

.pos-cell.active {
    background: rgba(102, 126, 234, 0.4);
    border-color: var(--primary);
}

.pos-cell.active::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
}

/* ========== 上传区域 ========== */
.upload-area {
    border: 2px dashed rgba(255,255,255,0.2);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.upload-area:hover {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.05);
}

.upload-area i {
    font-size: 2em;
    color: var(--primary);
    margin-bottom: 10px;
    display: block;
}

.upload-area span {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.upload-area small {
    color: var(--gray);
    font-size: 0.8em;
}

/* 控制面板 */
.controls-panel {
    margin-top: 15px;
    padding: 15px;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
    border: 1px solid var(--border);
}

/* 二维码区域 */
.qr-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

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

.qr-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: rgba(255,255,255,0.05);
    border: 2px solid transparent;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s;
}

.qr-item:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(102, 126, 234, 0.5);
}

.qr-item input[type="checkbox"] {
    cursor: pointer;
}

.qr-item img {
    border-radius: 4px;
}

/* ========== 右侧预览区 ========== */
.right-panel {
    flex: 1;
    background: var(--darker);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 30px;
    position: relative;
    overflow: auto;
}

.canvas-wrapper {
    background: rgba(255,255,255,0.05);
    border-radius: 15px;
    padding: 20px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    text-align: center;
    max-height: 70vh;
}

#posterCanvas {
    display: block;
    background: #fff;
    border-radius: 8px;
    max-width: 100%;
    max-height: 65vh;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.canvas-info {
    margin-top: 15px;
    color: var(--gray);
    font-size: 0.85em;
}

.canvas-info .separator {
    margin: 0 10px;
    opacity: 0.5;
}

/* 操作栏 */
.action-bar {
    margin-top: 20px;
    display: flex;
    gap: 15px;
}

.btn-action {
    padding: 12px 30px;
    border: none;
    border-radius: 10px;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-download {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5);
}

.btn-download-jpg {
    background: linear-gradient(135deg, #764ba2 0%, var(--primary) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(118, 75, 162, 0.4);
}

.btn-download-jpg:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(118, 75, 162, 0.5);
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--dark);
}

::-webkit-scrollbar-thumb {
    background: #3d3d6a;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ========== 响应式 ========== */
@media (max-width: 1400px) {
    :root {
        --panel-width: 380px;
    }
}

@media (max-width: 1200px) {
    .mode-switcher {
        display: none;
    }
    
    :root {
        --panel-width: 350px;
    }
}

@media (max-width: 992px) {
    :root {
        --panel-width: 320px;
    }
    
    .size-grid-v2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Toast消息样式 */
.toast-message {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 0.95em;
    z-index: 9999;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}