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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #2d5a3d;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 1;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.2);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, transparent, #4caf50, transparent);
    animation: headerGlow 3s ease-in-out infinite;
}

@keyframes headerGlow {
    0% { left: -100%; }
    50% { left: 100%; }
    100% { left: 100%; }
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #4caf50, #81c784, #4caf50);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
    animation: titleGradient 4s ease-in-out infinite;
}

@keyframes titleGradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.header p {
    font-size: 1.1rem;
    color: #66bb6a;
    opacity: 0.9;
}

/* 主要内容区域 */
.main {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

/* 表单容器 */
.form-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 35px;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.2);
    transition: all 0.3s ease;
}

.form-container:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(76, 175, 80, 0.15);
}

/* 表单样式 */
.qr-form {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-group label {
    font-weight: 600;
    color: #2d5a3d;
    font-size: 0.95rem;
}

textarea, select {
    padding: 12px 16px;
    border: 2px solid rgba(76, 175, 80, 0.3);
    border-radius: 12px;
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
    resize: vertical;
}

textarea {
    min-height: 100px;
    font-family: inherit;
}

textarea:focus, select:focus {
    outline: none;
    border-color: #4caf50;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
    background: rgba(255, 255, 255, 1);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

/* 按钮样式 */
.generate-btn {
    padding: 15px 30px;
    background: linear-gradient(135deg, #4caf50, #66bb6a);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.5px;
}

.generate-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.generate-btn:hover::before {
    left: 100%;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(76, 175, 80, 0.3);
}

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

.generate-btn.loading .btn-text {
    display: none;
}

.generate-btn.loading .btn-loading {
    display: inline;
}

.btn-loading {
    display: none;
}

/* 结果容器 */
.result-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 35px;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(76, 175, 80, 0.1);
    border: 1px solid rgba(76, 175, 80, 0.2);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

/* 加载动画 */
.loading {
    text-align: center;
    color: #4caf50;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(76, 175, 80, 0.2);
    border-top: 4px solid #4caf50;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

/* 错误样式 */
.error {
    text-align: center;
    color: #d32f2f;
}

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

.error-message {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: #666;
}

.retry-btn {
    padding: 10px 20px;
    background: #4caf50;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.retry-btn:hover {
    background: #45a049;
    transform: translateY(-1px);
}

/* 结果显示 */
.result {
    width: 100%;
    text-align: center;
}

.qr-display {
    margin-bottom: 25px;
}

.qr-display img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(76, 175, 80, 0.2);
    transition: all 0.3s ease;
}

.qr-display img:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 30px rgba(76, 175, 80, 0.3);
}

.result-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.result-text {
    font-size: 1rem;
    color: #666;
    word-break: break-all;
    background: rgba(76, 175, 80, 0.1);
    padding: 12px;
    border-radius: 8px;
    border-left: 4px solid #4caf50;
}

.result-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.download-btn, .copy-btn, .new-btn {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.download-btn {
    background: #4caf50;
    color: white;
}

.copy-btn {
    background: #2196f3;
    color: white;
}

.new-btn {
    background: #ff9800;
    color: white;
}

.download-btn:hover, .copy-btn:hover, .new-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* 隐藏类 */
.hidden {
    display: none !important;
}

/* 页脚样式 */
.footer {
    text-align: center;
    margin-top: 40px;
    padding: 25px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(15px);
    border-radius: 15px;
    color: #66bb6a;
    font-size: 0.9rem;
    border: 1px solid rgba(76, 175, 80, 0.1);
}

/* 平板端适配 (768px - 1024px) */
@media (max-width: 1024px) and (min-width: 768px) {
    .container {
        max-width: 95%;
        padding: 15px;
    }
    
    .main {
        gap: 30px;
    }
    
    .header h1 {
        font-size: 2.2rem;
    }
    
    .form-container, .result-container {
        padding: 25px;
    }
    
    .options-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 手机端适配 (最大768px) */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header {
        margin-bottom: 25px;
        padding: 25px 15px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .header p {
        font-size: 1rem;
    }
    
    .main {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .form-container, .result-container {
        padding: 20px;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .result-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn, .copy-btn, .new-btn {
        width: 100%;
        max-width: 200px;
    }
}

/* 小屏手机适配 (最大480px) */
@media (max-width: 480px) {
    .container {
        padding: 8px;
    }
    
    .header {
        padding: 20px 10px;
        margin-bottom: 20px;
    }
    
    .header h1 {
        font-size: 1.6rem;
    }
    
    .form-container, .result-container {
        padding: 15px;
        border-radius: 15px;
    }
    
    .generate-btn {
        padding: 12px 20px;
        font-size: 1rem;
    }
    
    textarea {
        min-height: 80px;
    }
    
    .qr-display img {
        max-width: 90%;
    }
}