:root {
    --primary-color: #6a0dad;
    --secondary-color: #8a2be2;
    --accent-color: #00ffcc;
    --text-color: #e0e0e0;
    --light-bg: #1a1a2e;
    --dark-bg: #16213e;
    --border-color: #3a3a5a;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --gradient-start: #0f0c29;
    --gradient-end: #302b63;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    box-sizing: border-box;
}

.app-header {
    width: 100%;
    background-color: var(--dark-bg);
    color: #fff;
    text-align: center;
    padding: 10px 0;
    box-shadow: 0 4px 10px var(--shadow-color);
}

.app-header h1 {
    font-size: 2.0em;
    margin: 0;
    font-weight: 700;
    color: #a529ecf3;
}

.app-header .subtitle {
    font-size: 1em;
    margin: 5px 0 0;
    opacity: 0.8;
    color: var(--text-color);
}

.container {
    background-color: var(--dark-bg);
    border-radius: 15px;
    box-shadow: 0 8px 20px var(--shadow-color);
    width: 100%;
    max-width: 900px;
    margin: 20px 20px 80px 20px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.header {
    display: flex;
    justify-content: space-around;
    background-color: var(--light-bg);
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
}

.header .tab {
    color: var(--text-color);
    padding: 10px 20px;
    cursor: pointer;
    font-size: 1.5em;
    font-weight: 600;
    transition: transform 0.2s ease;
    border-radius: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    position: relative;
}

.header .tab i {
    color: var(--accent-color);
}

.header .tab:hover {
    transform: translateY(-2px);
}

.header .tab.active {
    color: var(--accent-color);
    transform: translateY(-2px);
}

.header .tab.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--accent-color);
}

.main-content {
    padding: 15px;
    flex-grow: 1;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease-out;
}

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

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

/* 上传区域 */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    margin-bottom: 10px;
    background-color: rgba(255, 255, 255, 0.03);
    transition: border-color 0.3s ease, background-color 0.3s ease;
    height: 350px;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    width: 0;
    flex-grow: 1;
    min-width: 380px;
    box-sizing: border-box;
}

#outfit-tab .upload-area {
    min-width: 380px;
}

#hairstyle-tab .upload-area,
#more-tab .upload-area {
    max-width: 480px;
}

.upload-area:hover {
    border-color: var(--accent-color);
    background-color: rgba(255, 255, 255, 0.1);
}

.upload-area .upload-text {
    color: var(--text-color);
    font-size: 1.1em;
    font-weight: 500;
    position: absolute;
}

.upload-area .thumbnail-preview {
    width: 100%;
    height: 100%;
    display: none;
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.upload-area .thumbnail-preview img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 8px;
    display: block;
}

/* 按钮组 */
.button-group {
    display: flex;
    justify-content: space-between;
    width: calc(100% - 30px);
    margin: 15px auto 25px auto;
    gap: 20px;
}

.button-group button {
    background-color: var(--primary-color);
    color: var(--text-color);
    border: none;
    border-radius: 8px;
    padding: 12px 0;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    flex: 1;
    text-align: center;
}

.button-group button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}

.button-group button:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* 针对more-tab中的按钮组特殊样式 */
#more-tab .button-group {
    flex-wrap: wrap;
    justify-content: center;
    height: auto;
}

#more-tab .button-group button {
    flex-basis: calc(25% - 15px); /* 每行4个按钮，考虑间距 */
    margin-bottom: 10px;
    min-width: 120px;
    max-width: calc(25% - 15px);
    box-sizing: border-box;
}

/* 保持其他标签页按钮样式不变 */
#hairstyle-tab .button-group,
#outfit-tab .button-group {
    flex-wrap: nowrap;
}

#hairstyle-tab .button-group button,
#outfit-tab .button-group button {
    flex-basis: auto;
    margin-bottom: 0;
    max-width: none;
}

#generate-outfit-btn {
    background-color: var(--primary-color);
    color: var(--text-color);
    border: none;
    border-radius: 8px;
    padding: 15px 35px;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    display: block;
    margin: 5px auto 25px auto;
    width: calc(100% - 20px);
    text-align: center;
    flex: none;
}

#generate-outfit-btn:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}

#generate-outfit-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* 结果区域 */
.result-area {
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 20px;
    min-height: 300px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    justify-items: center;
    align-items: start;
    text-align: center;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.05);
    margin-top: -10px;
}

.result-area .placeholder {
    color: #aaa;
    font-style: italic;
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 10px;
}

/* 加载动画 */
.loader {
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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

.result-image-wrapper {
    position: relative;
    width: 100%;
    max-width: 300px;
    height: auto;
    min-height: 150px;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.result-image-wrapper:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.15);
}

.result-image-wrapper img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
}

.download-icon {
    position: absolute;
    top: 8px;
    right: 8px;
    background-color: rgba(0, 0, 0, 0.6);
    color: #fff;
    padding: 5px 8px;
    border-radius: 5px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    font-size: 1.1em;
    z-index: 10;
}

.result-image-wrapper:hover .download-icon {
    opacity: 1;
    visibility: visible;
}

/* 服饰更换的上传区域网格布局 - 已修复 */
.upload-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 15px;
    width: 100%;
    justify-content: center;
    align-items: center;
}

#hairstyle-tab .upload-grid,
#more-tab .upload-grid {
    grid-template-columns: 1fr;
    justify-items: center;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

#outfit-tab .upload-grid {
    grid-template-columns: 1fr 1fr;
    width: 100%;
    justify-items: center;
}

/* 底部文本 */
.footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    text-align: center;
    padding: 10px 0;
    background-color: var(--light-bg);
    z-index: 100;
}

.donate-text {
    color: var(--accent-color);
    font-size: 0.8em;
    font-weight: 500;
    text-decoration: underline;
    transition: color 0.3s ease;
    cursor: pointer;
}

.donate-text:hover {
    color: var(--secondary-color);
}

/* 模态框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background-color: var(--dark-bg);
    border-radius: 12px;
    padding: 20px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: 0 8px 20px var(--shadow-color);
    position: relative;
}

.modal-content h3 {
    margin: 0 0 15px;
    color: var(--accent-color);
    font-size: 1.5em;
}

.modal-content .qr-code {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.close-modal {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 1.5em;
    color: var(--text-color);
    cursor: pointer;
    transition: color 0.3s ease;
}

.close-modal:hover {
    color: var(--secondary-color);
}

/* 响应式设计 - 已修复移动端超出屏幕问题 */
@media (max-width: 768px) {
    .container {
        margin: 10px;
        margin-bottom: 60px;
        width: calc(100% - 20px);
    }

    .header {
        flex-direction: row;
        padding: 10px 0;
    }

    .header .tab {
        font-size: 0.9em;
        padding: 8px 10px;
        flex-grow: 1;
        justify-content: center;
    }

    .main-content {
        padding: 10px;
    }

    .upload-area {
        padding: 10px;
        height: 250px;
        margin-bottom: 5px;
        width: 100%;
        min-width: unset;
        max-width: 100%;
    }

    #outfit-tab .upload-area {
        min-width: unset;
        max-width: 100%;
        height: 220px; /* 稍微降低高度以适应小屏幕 */
    }

    #hairstyle-tab .upload-area,
    #more-tab .upload-area {
        max-width: 100%;
    }

    .upload-area .upload-text {
        font-size: 1em;
    }

    .upload-area .thumbnail-preview {
        height: 100%;
    }

    .button-group {
        width: 90%;
        margin: 10px auto 20px auto;
        gap: 10px;
    }

    .button-group button {
        font-size: 1em;
        padding: 6px 0;
        flex: 1;
    }

    /* More标签页按钮响应式 - 始终保持2行4列 */
    #more-tab .button-group {
        height: auto;
    }
    
    #more-tab .button-group button {
        flex-basis: calc(25% - 10px);
        min-width: unset;
        max-width: calc(25% - 10px);
        font-size: 0.85em;
        padding: 8px 0;
    }

    #generate-outfit-btn {
        font-size: 1em;
        padding: 6px 15px;
        width: 90%;
        text-align: center;
        flex: none;
        margin: 5px auto 20px auto;
    }

    .result-area {
        min-height: 250px;
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        padding: 15px;
        margin-top: -5px;
    }

    .upload-grid {
        margin-bottom: 10px;
        gap: 10px;
        width: 100%;
    }

    #hairstyle-tab .upload-grid,
    #more-tab .upload-grid {
        max-width: 100%;
    }

    /* 确保在移动端也保持水平排列 */
    #outfit-tab .upload-grid {
        grid-template-columns: 1fr 1fr; /* 保持两列布局 */
        margin-bottom: 10px;
        gap: 10px; /* 减小间距以适应小屏幕 */
    }

    .modal-content {
        max-width: 350px;
    }

    .footer {
        padding: 8px 0;
    }
}

@media (max-width: 480px) {
    .header .tab {
        padding: 6px 8px;
        font-size: 0.8em;
    }
    .header .tab i {
        font-size: 1.2em;
    }
    .upload-area {
        height: 200px;
        padding: 8px;
    }

    #outfit-tab .upload-area {
        height: 180px; /* 进一步降低高度以适应小屏幕 */
    }

    .upload-area .upload-text {
        font-size: 0.9em;
    }
    
    /* More标签页按钮响应式 - 始终保持2行4列 */
    #more-tab .button-group {
        gap: 8px;
    }
    
    #more-tab .button-group button {
        flex-basis: calc(25% - 8px);
        max-width: calc(25% - 8px);
        font-size: 0.75em;
        padding: 6px 0;
    }

    .result-area {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }
    .result-image-wrapper {
        max-width: 200px;
        min-height: 100px;
    }
    .modal-content {
        max-width: 300px;
        padding: 15px;
    }
    .modal-content h3 {
        font-size: 1.2em;
    }
    .footer {
        padding: 6px 0;
        font-size: 0.9em;
    }
    
    /* 确保在移动端也保持水平排列 */
    #outfit-tab .upload-grid {
        grid-template-columns: 1fr 1fr; /* 保持两列布局 */
        gap: 8px; /* 减小间距以适应小屏幕 */
    }
}