* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS变量 - 浅色主题 */
:root {
    --bg-color: #f5f5f5;
    --card-bg: #ffffff;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --border-color: #e2e8f0;
    --header-bg: #4a5568;
    --header-text: #ffffff;
    --primary-btn: #667eea;
    --primary-btn-hover: #5a67d8;
    --danger-btn: #e53e3e;
    --danger-btn-hover: #c53030;
    --nav-active: #667eea;
    --nav-text: #718096;
}

/* 深色主题 */
body.dark-theme {
    --bg-color: #1a202c;
    --card-bg: #2d3748;
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --border-color: #4a5568;
    --header-bg: #2d3748;
    --header-text: #ffffff;
    --primary-btn: #667eea;
    --primary-btn-hover: #5a67d8;
    --danger-btn: #fc8181;
    --danger-btn-hover: #f56565;
    --nav-active: #667eea;
    --nav-text: #a0aec0;
}

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.phone-container {
    width: 375px;
    height: 812px;
    background: #ffffff;
    border-radius: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
    border: 8px solid #000;
}

.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: calc(100% - 60px);
    background: #f5f5f5;
    display: none;
    flex-direction: column;
}

.screen.active {
    display: flex;
}

header {
    background: #4a5568;
    color: white;
    padding: 20px;
    text-align: center;
    position: relative;
}

header h1 {
    font-size: 20px;
    font-weight: bold;
}

.back-btn {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
}

main {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
}

.canvas-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
}

#avatarCanvas {
    border: 4px solid #e2e8f0;
    border-radius: 12px;
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.canvas-overlay {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
}

.customization-panel {
    background: white;
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.customization-panel h3 {
    margin-bottom: 16px;
    color: #2d3748;
    font-size: 16px;
}

.option-group {
    margin-bottom: 16px;
}

.option-group:last-child {
    margin-bottom: 0;
}

.option-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #4a5568;
    font-size: 14px;
}

.color-themes, .style-options, .detail-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.seed-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.seed-input-group input {
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
}

.seed-input-group button.action-btn.small {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.theme-btn, .style-btn, .detail-btn {
    padding: 8px 12px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    background: white;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

.theme-btn:hover, .style-btn:hover, .detail-btn:hover {
    background: #edf2f7;
    border-color: #cbd5e0;
}

.theme-btn.active, .style-btn.active, .detail-btn.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.bottom-actions {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-top: 20px;
}

.action-btn {
    padding: 12px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
}

.action-btn.primary {
    background: #667eea;
    color: white;
}

.action-btn.primary:hover {
    background: #5a67d8;
}

.action-btn:hover {
    background: #e2e8f0;
}

.action-btn.danger {
    background: #e53e3e;
    color: white;
}

.action-btn.danger:hover {
    background: #c53030;
}

.favorites-grid,
.history-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-top: 20px;
}

.history-actions {
    display: flex;
    justify-content: center;
    padding: 1rem;
    gap: 1rem;
}

.favorite-item {
    position: relative;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s;
}

.favorite-item:hover {
    border-color: #667eea;
    transform: scale(1.05);
}

.favorite-item img {
    width: 100%;
    height: auto;
    display: block;
}

.remove-favorite {
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(255, 0, 0, 0.8);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
}

.settings-panel {
    background: white;
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid #e2e8f0;
}

.setting-item:last-child {
    border-bottom: none;
}

.setting-item label {
    font-weight: bold;
    color: #4a5568;
}

.setting-item select, .setting-item input {
    padding: 6px 10px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    background: var(--card-bg);
    color: var(--text-primary);
}

.bottom-nav {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background: white;
    border-top: 1px solid #e2e8f0;
    display: flex;
}

.nav-btn {
    flex: 1;
    background: none;
    border: none;
    font-size: 14px;
    font-weight: bold;
    color: #718096;
    cursor: pointer;
    transition: all 0.2s;
}

.nav-btn:hover {
    background: #f7fafc;
}

.nav-btn.active {
    color: #667eea;
    border-top: 3px solid #667eea;
}

/* 响应式设计 */
@media (max-width: 400px) {
    .phone-container {
        width: 100%;
        height: 100vh;
        border-radius: 0;
        border: none;
    }
    
    body {
        padding: 0;
    }
}

/* 滚动条样式 */
main::-webkit-scrollbar {
    width: 4px;
}

main::-webkit-scrollbar-track {
    background: var(--border-color);
}

main::-webkit-scrollbar-thumb {
    background: var(--text-secondary);
    border-radius: 2px;
}

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

/* 编辑界面样式 */
.edit-tools {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 16px;
    margin-top: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

#colorPicker {
    width: 100%;
    height: 40px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
}

.tool-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.tool-btn {
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

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

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

.edit-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-top: 16px;
}

/* 编辑画布样式 */
#editCanvas {
    border: 4px solid var(--border-color);
    border-radius: 12px;
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    cursor: crosshair;
}