/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

/* 头部样式 */
.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 主要内容区域 */
.main {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

/* 消息样式 */
.success-message, .error-message {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
}

.success-message {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.error-message {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* 表单样式 */
.redeem-form .form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Courier New', monospace;
    resize: vertical;
    transition: border-color 0.3s ease;
}

.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-hint {
    display: block;
    margin-top: 5px;
    color: #6c757d;
    font-size: 0.9rem;
}

.form-actions {
    text-align: center;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-large {
    padding: 15px 40px;
    font-size: 1.1rem;
}

/* 结果区域 */
.results-section {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 2px solid #e1e5e9;
}

.results-container {
    display: grid;
    gap: 20px;
}

.token-result {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid #28a745;
}

.code-info {
    margin-bottom: 10px;
    color: #495057;
}

.token-info {
    margin-bottom: 10px;
    color: #333;
}

.token-value {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 5px;
}

.token-value code {
    background: #e9ecef;
    padding: 8px 12px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    word-break: break-all;
    flex: 1;
}

.btn-copy {
    background: #28a745;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: background-color 0.3s ease;
    white-space: nowrap;
}

.btn-copy:hover {
    background: #218838;
}

.btn-copy.copied {
    background: #6c757d;
}

/* 使用说明 */
.instructions-section {
    margin-top: 40px;
}

.instructions {
    display: grid;
    gap: 20px;
}

.instruction-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.instruction-number {
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.instruction-text h3 {
    margin-bottom: 5px;
    color: #333;
}

.instruction-text p {
    color: #6c757d;
    font-size: 0.95rem;
}

/* 页脚 */
.footer {
    text-align: center;
    color: white;
    opacity: 0.8;
    padding: 20px 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .main {
        padding: 25px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .token-value {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-copy {
        align-self: flex-start;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }
    
    .main {
        padding: 20px;
    }
    
    .btn-large {
        width: 100%;
        padding: 15px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.results-section {
    animation: fadeIn 0.5s ease;
}

/* 滚动条样式 */
textarea::-webkit-scrollbar {
    width: 8px;
}

textarea::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

textarea::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

textarea::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}