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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #2d5a3d;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 容器布局 */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 20px;
    background: linear-gradient(135deg, #e8f5e8 0%, #f0f9f0 100%);
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(45, 90, 61, 0.1);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d5a3d;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(45, 90, 61, 0.1);
}

.subtitle {
    font-size: 1.1rem;
    color: #5a8a6b;
    font-weight: 400;
}

/* 主内容区域 */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* 表单容器 */
.form-container {
    background: #ffffff;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(45, 90, 61, 0.1);
    border: 1px solid #e8f5e8;
}

.password-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

/* 表单组样式 */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.form-group label {
    font-weight: 600;
    color: #2d5a3d;
    font-size: 1rem;
}

.section-title {
    font-size: 1.1rem;
    color: #2d5a3d;
    font-weight: 600;
    margin-bottom: 8px;
}

/* 长度控制 */
.length-control {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: #f8fdf8;
    border-radius: 12px;
    border: 2px solid #e8f5e8;
}

.length-slider {
    flex: 1;
    height: 6px;
    background: #e8f5e8;
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.length-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, #4caf50, #45a049);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

.length-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, #4caf50, #45a049);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(76, 175, 80, 0.3);
}

.length-display {
    min-width: 40px;
    text-align: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: #2d5a3d;
    background: #ffffff;
    padding: 8px 12px;
    border-radius: 8px;
    border: 2px solid #e8f5e8;
}

/* 复选框组 */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #f8fdf8;
    border-radius: 10px;
    border: 2px solid #e8f5e8;
    transition: all 0.3s ease;
    cursor: pointer;
}

.checkbox-item:hover {
    background: #f0f9f0;
    border-color: #d4edda;
    transform: translateY(-1px);
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: #4caf50;
    cursor: pointer;
}

.checkbox-item label {
    flex: 1;
    cursor: pointer;
    font-weight: 500;
    color: #2d5a3d;
    margin: 0;
}

/* 生成按钮 */
.generate-btn {
    background: linear-gradient(135deg, #4caf50, #45a049);
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(76, 175, 80, 0.3);
    position: relative;
    overflow: hidden;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

.generate-btn:active {
    transform: translateY(0);
}

.generate-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* 结果容器 */
.result-container {
    background: #ffffff;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(45, 90, 61, 0.1);
    border: 1px solid #e8f5e8;
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.result-header h3 {
    color: #2d5a3d;
    font-size: 1.3rem;
    font-weight: 600;
}

.copy-btn {
    background: #4caf50;
    color: white;
    border: none;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-btn:hover {
    background: #45a049;
    transform: scale(1.05);
}

/* 密码显示 */
.password-display {
    margin-bottom: 25px;
}

.password-input {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid #e8f5e8;
    border-radius: 12px;
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    font-weight: 600;
    color: #2d5a3d;
    background: #f8fdf8;
    text-align: center;
    letter-spacing: 1px;
    word-break: break-all;
}

.password-input:focus {
    outline: none;
    border-color: #4caf50;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

/* 密码信息 */
.password-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    margin-bottom: 25px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 12px 16px;
    background: #f8fdf8;
    border-radius: 10px;
    border: 1px solid #e8f5e8;
}

.info-item.full-width {
    grid-column: 1 / -1;
}

.info-label {
    font-size: 0.9rem;
    color: #5a8a6b;
    font-weight: 500;
}

.info-value {
    font-size: 1rem;
    color: #2d5a3d;
    font-weight: 600;
}

.info-value.strength {
    padding: 4px 8px;
    border-radius: 6px;
    text-align: center;
    color: white;
    font-weight: 700;
}

.strength.weak {
    background: #f44336;
}

.strength.medium {
    background: #ff9800;
}

.strength.strong {
    background: #4caf50;
}

.strength.very-strong {
    background: #2e7d32;
}

/* 字符集显示 */
.character-sets {
    border-top: 1px solid #e8f5e8;
    padding-top: 20px;
}

.character-sets h4 {
    color: #2d5a3d;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.sets-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.set-item {
    background: #e8f5e8;
    color: #2d5a3d;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

/* 错误容器 */
.error-container {
    background: #ffffff;
    border-radius: 16px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(244, 67, 54, 0.1);
    border: 1px solid #ffebee;
}

.error-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.error-container h3 {
    color: #d32f2f;
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.error-container p {
    color: #666;
    margin-bottom: 20px;
}

.retry-btn {
    background: #f44336;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.retry-btn:hover {
    background: #d32f2f;
    transform: translateY(-1px);
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 30px 20px;
    color: #5a8a6b;
    font-size: 0.9rem;
}

/* 提示框 */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background: #4caf50;
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(76, 175, 80, 0.3);
    z-index: 1000;
    animation: toastSlide 0.3s ease-out;
}

@keyframes toastSlide {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* 平板端适配 (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
    .container {
        max-width: 700px;
        padding: 25px;
    }
    
    .header h1 {
        font-size: 2.2rem;
    }
    
    .form-container,
    .result-container {
        padding: 25px;
    }
    
    .password-info {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 手机端适配 (最大767px) */
@media (max-width: 767px) {
    .container {
        padding: 15px;
        max-width: 100%;
    }
    
    .header {
        padding: 20px 15px;
        margin-bottom: 25px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .form-container,
    .result-container {
        padding: 20px;
        border-radius: 12px;
    }
    
    .password-form {
        gap: 20px;
    }
    
    .form-group {
        gap: 10px;
    }
    
    .length-control {
        padding: 12px;
        gap: 12px;
    }
    
    .length-display {
        min-width: 35px;
        padding: 6px 10px;
        font-size: 1.1rem;
    }
    
    .checkbox-item {
        padding: 10px 12px;
        gap: 10px;
    }
    
    .checkbox-item input[type="checkbox"] {
        width: 16px;
        height: 16px;
    }
    
    .generate-btn {
        padding: 14px 28px;
        font-size: 1rem;
    }
    
    .password-input {
        padding: 14px 16px;
        font-size: 1rem;
        letter-spacing: 0.5px;
    }
    
    .password-info {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .info-item {
        padding: 10px 12px;
    }
    
    .result-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    .copy-btn {
        align-self: center;
        padding: 12px 20px;
        border-radius: 10px;
    }
    
    .toast {
        right: 15px;
        left: 15px;
        top: 15px;
        text-align: center;
    }
}

/* 小屏手机适配 (最大480px) */
@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .header {
        padding: 15px 10px;
        margin-bottom: 20px;
    }
    
    .header h1 {
        font-size: 1.6rem;
    }
    
    .form-container,
    .result-container {
        padding: 15px;
    }
    
    .checkbox-item {
        padding: 8px 10px;
    }
    
    .generate-btn {
        padding: 12px 24px;
    }
    
    .password-input {
        padding: 12px 14px;
        font-size: 0.95rem;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .checkbox-item,
    .generate-btn,
    .copy-btn,
    .retry-btn {
        min-height: 44px;
    }
    
    .checkbox-item input[type="checkbox"] {
        width: 20px;
        height: 20px;
    }
    
    .length-slider::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .form-container,
    .result-container {
        border: 2px solid #2d5a3d;
    }
    
    .checkbox-item {
        border: 1px solid #2d5a3d;
    }
    
    .password-input {
        border: 2px solid #2d5a3d;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}