/* 自定义样式 */
.bg-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 按钮加载状态 */
.btn-loading {
    opacity: 0.6;
    cursor: not-allowed !important;
    position: relative;
}

.btn-loading::after {
    content: "";
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 8px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 表单元素增强 */
.form-input {
    transition: all 0.2s ease-in-out;
}

.form-input:focus {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

/* 卡片阴影效果 */
.card-shadow {
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.card-shadow:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    transform: translateY(-2px);
    transition: all 0.3s ease;
}

/* 按钮效果增强 */
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: all 0.2s ease;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
}

/* 消息提示动画 */
.message-enter {
    animation: slideInDown 0.3s ease-out;
}

.message-exit {
    animation: slideOutUp 0.3s ease-in;
}

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

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

/* 移动端适配 */
@media (max-width: 640px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .card-padding {
        padding: 1.5rem;
    }
    
    .btn-group {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .btn-group button {
        width: 100%;
    }
}

/* 输入框状态指示 */
.input-success {
    border-color: #10b981;
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.input-error {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* 倒计时按钮特殊样式 */
.countdown-btn {
    background: linear-gradient(135deg, #9ca3af 0%, #6b7280 100%);
    cursor: not-allowed;
}

/* 产品信息卡片 */
.product-card {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
    border: 1px solid rgba(99, 102, 241, 0.1);
}

/* 价格显示效果 */
.price-display {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

/* 图标动画 */
.icon-bounce {
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translate3d(0, 0, 0);
    }
    40%, 43% {
        transform: translate3d(0, -5px, 0);
    }
    70% {
        transform: translate3d(0, -3px, 0);
    }
    90% {
        transform: translate3d(0, -1px, 0);
    }
}

/* 加载骨架屏 */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, transparent 37%, transparent 63%, #f0f0f0 75%);
    background-size: 400% 100%;
    animation: skeleton-loading 1.4s ease infinite;
}

@keyframes skeleton-loading {
    0% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0 50%;
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    .dark-mode-card {
        background: #1f2937;
        border-color: #374151;
    }
    
    .dark-mode-text {
        color: #f9fafb;
    }
    
    .dark-mode-input {
        background: #374151;
        border-color: #4b5563;
        color: #f9fafb;
    }
}