/* ========================================
   高清化处理页面 - 深空黑极光主题
   渐进式视觉升级（保持布局不变）
   ======================================== */

/* 全局变量 */
:root {
    /* 深空黑色系 */
    --space-black: #0a0e1a;
    --deep-space: #121827;
    --dark-panel: #1a1f35;
    --card-bg: #1e2438;
    
    /* 极光渐变色 */
    --aurora-cyan: #00d4ff;
    --aurora-blue: #0066ff;
    --aurora-purple: #8b5cf6;
    --aurora-pink: #ec4899;
    
    /* 功能色 */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* 文字色 */
    --text-primary: #e8eaed;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
}

/* 页面背景 */
body {
    background: var(--space-black);
    background-image: 
        radial-gradient(ellipse at 20% 30%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
    background-attachment: fixed;
}

/* 顶部导航栏 */
.header {
    background: rgba(18, 24, 39, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

/* 主容器 */
.container {
    background: transparent;
}

/* 卡片面板 - 毛玻璃效果 */
.panel,
.upload-section,
.settings-section,
.preview-section,
.result-section {
    background: rgba(30, 36, 56, 0.6);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 16px;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.panel:hover,
.upload-section:hover,
.settings-section:hover {
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 
        0 12px 40px rgba(0, 0, 0, 0.4),
        0 0 30px rgba(0, 212, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

/* 面板标题 */
.panel-title,
h2, h3 {
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--aurora-cyan), var(--aurora-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

/* 上传区域 */
.upload-area {
    background: rgba(10, 14, 26, 0.5);
    border: 2px dashed rgba(0, 212, 255, 0.3);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.upload-area:hover {
    border-color: var(--aurora-cyan);
    background: rgba(0, 212, 255, 0.05);
    box-shadow: 0 0 30px rgba(0, 212, 255, 0.15);
}

.upload-area.dragover {
    border-color: var(--aurora-blue);
    background: rgba(0, 102, 255, 0.1);
    box-shadow: 0 0 40px rgba(0, 102, 255, 0.2);
}

/* 按钮 - 极光渐变 */
.btn-primary,
button[type="submit"],
.enhance-btn {
    background: linear-gradient(135deg, var(--aurora-cyan), var(--aurora-blue));
    border: none;
    border-radius: 10px;
    color: white;
    font-weight: 600;
    padding: 12px 28px;
    position: relative;
    overflow: hidden;
    box-shadow: 
        0 4px 15px rgba(0, 212, 255, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.btn-primary::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;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 6px 25px rgba(0, 212, 255, 0.4),
        0 0 30px rgba(0, 212, 255, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

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

/* 次要按钮 */
.btn-secondary {
    background: rgba(30, 36, 56, 0.8);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 10px;
    color: var(--aurora-cyan);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--aurora-cyan);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

/* 选项卡 */
.scale-option,
.level-option {
    background: rgba(30, 36, 56, 0.6);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    color: var(--text-secondary);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.scale-option:hover,
.level-option:hover {
    border-color: var(--aurora-cyan);
    background: rgba(0, 212, 255, 0.1);
    color: var(--text-primary);
}

.scale-option.selected,
.level-option.selected {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(0, 102, 255, 0.2));
    border-color: var(--aurora-cyan);
    color: white;
    box-shadow: 
        0 0 20px rgba(0, 212, 255, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* 进度条 */
.progress-bar {
    background: rgba(10, 14, 26, 0.8);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.progress-fill {
    background: linear-gradient(90deg, var(--aurora-cyan), var(--aurora-blue), var(--aurora-purple));
    background-size: 200% 100%;
    border-radius: 10px;
    box-shadow: 
        0 0 20px rgba(0, 212, 255, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    animation: progressShine 2s ease-in-out infinite;
}

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

/* 图片预览 */
.preview-image,
.result-image {
    border-radius: 12px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.4),
        0 0 40px rgba(0, 212, 255, 0.1);
}

/* 输入框 */
input[type="text"],
input[type="number"],
select,
textarea {
    background: rgba(10, 14, 26, 0.6);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 10px 14px;
    transition: all 0.3s ease;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--aurora-cyan);
    background: rgba(0, 212, 255, 0.05);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

/* 标签 */
label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* 提示信息 */
.info-text,
.help-text {
    color: var(--text-muted);
    font-size: 13px;
}

/* 成功提示 */
.success-message {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 8px;
    color: var(--success);
}

/* 错误提示 */
.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 8px;
    color: var(--error);
}

/* 加载动画 */
.loading-spinner {
    border: 3px solid rgba(0, 212, 255, 0.1);
    border-top-color: var(--aurora-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(10, 14, 26, 0.5);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--aurora-cyan), var(--aurora-blue));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--aurora-blue), var(--aurora-purple));
}

/* 响应式 */
@media (max-width: 768px) {
    .panel,
    .upload-section,
    .settings-section {
        border-radius: 12px;
    }
    
    .btn-primary {
        padding: 10px 20px;
    }
}