:root {
    --cyber-primary: #00ff9f;
    --cyber-secondary: #00b8ff;
    --cyber-accent: #ff2a6d;
    --cyber-warning: #ffd700;
    --cyber-info: #9945ff;
    --cyber-background: #1a1a1a;
    --cyber-dark: #141414;
    --cyber-border: #2a2a2a;
    --cyber-text: #e0e0e0;
    --cyber-glow: 0 0 10px rgba(0, 255, 159, 0.5);
    --cyber-glow-secondary: 0 0 10px rgba(0, 184, 255, 0.5);
    --cyber-glow-accent: 0 0 10px rgba(255, 42, 109, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Rajdhani', 'Orbitron', sans-serif;
    background-color: var(--cyber-background);
    background-image: 
        linear-gradient(45deg, var(--cyber-dark) 25%, transparent 25%),
        linear-gradient(-45deg, var(--cyber-dark) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--cyber-dark) 75%),
        linear-gradient(-45deg, transparent 75%, var(--cyber-dark) 75%);
    background-size: 20px 20px;
    padding: 20px;
    color: var(--cyber-text);
    min-height: 100vh;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    background-color: var(--cyber-dark);
    padding: 30px;
    border: 1px solid var(--cyber-border);
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 255, 159, 0.1);
    position: relative;
}

.container::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--cyber-primary), var(--cyber-secondary));
    z-index: -1;
    border-radius: 10px;
    opacity: 0.3;
}

/* 头部导航 */
.header-nav {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--cyber-border);
}

.back-btn {
    padding: 10px 20px;
    background-color: transparent;
    border: 1px solid var(--cyber-secondary);
    color: var(--cyber-secondary);
    text-decoration: none;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: bold;
    transition: all 0.3s ease;
    font-size: 0.9em;
}

.back-btn:hover {
    background-color: var(--cyber-secondary);
    color: var(--cyber-dark);
    box-shadow: var(--cyber-glow-secondary);
}

.page-title {
    color: var(--cyber-primary);
    font-size: 2.5em;
    text-transform: uppercase;
    letter-spacing: 3px;
    text-shadow: var(--cyber-glow);
    font-family: 'Orbitron', sans-serif;
}

/* 主标签切换 */
.main-tabs {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.main-tab-btn {
    flex: 1;
    padding: 15px 30px;
    background-color: rgba(26, 26, 26, 0.8);
    border: 1px solid var(--cyber-border);
    color: var(--cyber-text);
    cursor: pointer;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: bold;
    font-size: 1.1em;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.main-tab-btn:hover {
    border-color: var(--cyber-secondary);
    transform: translateY(-2px);
}

.main-tab-btn.active {
    background-color: var(--cyber-primary);
    border-color: var(--cyber-primary);
    color: var(--cyber-dark);
    box-shadow: var(--cyber-glow);
}

.tab-icon {
    font-size: 1.3em;
}

.main-tab-content {
    display: none;
}

.main-tab-content.active {
    display: block;
}

/* 章节标题 */
.section-title {
    color: var(--cyber-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
    font-size: 1.2em;
    text-shadow: var(--cyber-glow);
    display: flex;
    align-items: center;
    gap: 10px;
}

.title-icon {
    font-size: 1.3em;
}

/* 按钮样式 */
.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 25px;
    padding: 20px;
    background-color: rgba(26, 26, 26, 0.8);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
}

.btn {
    padding: 12px 24px;
    border: 1px solid;
    border-radius: 4px;
    cursor: pointer;
    background-color: transparent;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: bold;
    font-size: 0.95em;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

.btn-icon {
    font-size: 1.2em;
}

.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: 0.5s;
}

.btn:not(:disabled):hover::before {
    left: 100%;
}

.btn-primary {
    border-color: var(--cyber-primary);
    color: var(--cyber-primary);
}

.btn-primary:not(:disabled):hover {
    background-color: var(--cyber-primary);
    color: var(--cyber-dark);
    box-shadow: var(--cyber-glow);
}

.btn-secondary {
    border-color: var(--cyber-secondary);
    color: var(--cyber-secondary);
}

.btn-secondary:not(:disabled):hover {
    background-color: var(--cyber-secondary);
    color: var(--cyber-dark);
    box-shadow: var(--cyber-glow-secondary);
}

.btn-accent {
    border-color: var(--cyber-accent);
    color: var(--cyber-accent);
}

.btn-accent:not(:disabled):hover {
    background-color: var(--cyber-accent);
    color: var(--cyber-dark);
    box-shadow: var(--cyber-glow-accent);
}

.btn-warning {
    border-color: var(--cyber-warning);
    color: var(--cyber-warning);
}

.btn-warning:not(:disabled):hover {
    background-color: var(--cyber-warning);
    color: var(--cyber-dark);
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.btn-info {
    border-color: var(--cyber-info);
    color: var(--cyber-info);
}

.btn-info:not(:disabled):hover {
    background-color: var(--cyber-info);
    color: var(--cyber-dark);
    box-shadow: 0 0 10px rgba(153, 69, 255, 0.5);
}

/* 设置区域 */
.settings-section {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    align-items: center;
    margin-bottom: 20px;
    padding: 15px 20px;
    background-color: rgba(26, 26, 26, 0.6);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
}

.setting-label {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--cyber-text);
    font-size: 1.1em;
    font-weight: 500;
}

.setting-select {
    padding: 8px 12px;
    background-color: var(--cyber-dark);
    border: 1px solid var(--cyber-border);
    border-radius: 4px;
    color: var(--cyber-primary);
    cursor: pointer;
    font-family: 'Share Tech Mono', monospace;
    transition: all 0.3s ease;
}

.setting-select:focus {
    outline: none;
    border-color: var(--cyber-primary);
    box-shadow: var(--cyber-glow);
}

/* 状态栏 */
.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background-color: rgba(26, 26, 26, 0.8);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
    margin-bottom: 20px;
    font-family: 'Share Tech Mono', monospace;
}

.status-text {
    color: var(--cyber-text);
    font-size: 1.1em;
    transition: all 0.3s ease;
}

.status-text.success {
    color: var(--cyber-primary);
    text-shadow: var(--cyber-glow);
}

.status-text.error {
    color: var(--cyber-accent);
}

.char-counts {
    display: flex;
    gap: 20px;
}

.char-count {
    color: var(--cyber-secondary);
    font-size: 0.95em;
}

/* 编辑器区域 */
.editor-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
}

.editor-panel {
    display: flex;
    flex-direction: column;
    background-color: rgba(26, 26, 26, 0.8);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background-color: rgba(20, 20, 20, 0.9);
    border-bottom: 1px solid var(--cyber-border);
}

.panel-header h3 {
    color: var(--cyber-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 1.1em;
    text-shadow: var(--cyber-glow);
}

.mini-btn {
    padding: 6px 12px;
    background-color: transparent;
    border: 1px solid var(--cyber-secondary);
    color: var(--cyber-secondary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85em;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.mini-btn:hover {
    background-color: var(--cyber-secondary);
    color: var(--cyber-dark);
    box-shadow: var(--cyber-glow-secondary);
}

/* 文本编辑器 */
.text-editor {
    width: 100%;
    min-height: 350px;
    padding: 20px;
    background-color: var(--cyber-dark);
    color: var(--cyber-text);
    border: none;
    font-family: 'Share Tech Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    outline: none;
}

.text-editor:focus {
    background-color: rgba(20, 20, 20, 0.95);
}

.text-editor::placeholder {
    color: #555;
}

/* 示例区域 */
.examples-section {
    padding: 20px;
    background-color: rgba(26, 26, 26, 0.6);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 12px;
}

.example-btn {
    padding: 12px 16px;
    background-color: var(--cyber-dark);
    border: 1px solid var(--cyber-border);
    color: var(--cyber-text);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.95em;
    transition: all 0.3s ease;
    text-align: left;
}

.example-btn:hover {
    border-color: var(--cyber-primary);
    color: var(--cyber-primary);
    transform: translateY(-2px);
    box-shadow: var(--cyber-glow);
}

/* 图片部分 */
.image-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}

.image-encode-section,
.image-decode-section {
    background-color: rgba(26, 26, 26, 0.8);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
    padding: 25px;
}

/* 上传区域 */
.upload-area {
    border: 2px dashed var(--cyber-border);
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
}

.upload-area:hover {
    border-color: var(--cyber-primary);
    background-color: rgba(0, 255, 159, 0.05);
}

.upload-area.dragover {
    border-color: var(--cyber-secondary);
    background-color: rgba(0, 184, 255, 0.1);
}

.upload-icon {
    font-size: 4em;
    margin-bottom: 15px;
}

.upload-text {
    color: var(--cyber-primary);
    font-size: 1.2em;
    font-weight: bold;
    margin-bottom: 10px;
}

.upload-hint {
    color: #888;
    font-size: 0.9em;
}

/* 图片预览 */
.image-preview,
.decoded-preview {
    background-color: rgba(20, 20, 20, 0.8);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
    padding: 20px;
    margin-bottom: 20px;
}

.image-preview.hidden,
.decoded-preview.hidden {
    display: none;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.preview-header h4 {
    color: var(--cyber-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.image-preview img,
.decoded-preview img {
    max-width: 100%;
    max-height: 300px;
    display: block;
    margin: 0 auto;
    border: 1px solid var(--cyber-border);
    border-radius: 4px;
}

.image-info {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--cyber-border);
    font-size: 0.9em;
    color: #aaa;
}

.image-info span {
    font-family: 'Share Tech Mono', monospace;
}

/* 图片按钮 */
.image-buttons,
.decode-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

/* Base64 输出 */
.base64-output {
    background-color: rgba(20, 20, 20, 0.8);
    border: 1px solid var(--cyber-border);
    border-radius: 6px;
    padding: 20px;
}

.base64-output.hidden {
    display: none;
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.output-header h4 {
    color: var(--cyber-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.output-length {
    color: var(--cyber-secondary);
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.9em;
}

.base64-textarea {
    width: 100%;
    min-height: 200px;
    padding: 15px;
    background-color: var(--cyber-dark);
    border: 1px solid var(--cyber-border);
    border-radius: 4px;
    color: var(--cyber-primary);
    font-family: 'Share Tech Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
    resize: vertical;
    word-break: break-all;
}

.base64-textarea:focus {
    outline: none;
    border-color: var(--cyber-primary);
    box-shadow: var(--cyber-glow);
}

/* 解码输入区 */
.decode-input-area {
    margin-bottom: 20px;
}

.decode-input-area .base64-textarea {
    margin-bottom: 15px;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .editor-container,
    .image-section {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .page-title {
        font-size: 1.8em;
    }

    .header-nav {
        flex-direction: column;
        align-items: flex-start;
    }

    .main-tabs {
        flex-direction: column;
    }

    .action-buttons,
    .image-buttons,
    .decode-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .examples-grid {
        grid-template-columns: 1fr;
    }

    .settings-section {
        flex-direction: column;
        align-items: flex-start;
    }

    .status-bar {
        flex-direction: column;
        gap: 10px;
    }

    .char-counts {
        flex-direction: column;
        gap: 5px;
    }
}

/* 滚动条样式 */
.text-editor::-webkit-scrollbar,
.base64-textarea::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.text-editor::-webkit-scrollbar-track,
.base64-textarea::-webkit-scrollbar-track {
    background: var(--cyber-dark);
}

.text-editor::-webkit-scrollbar-thumb,
.base64-textarea::-webkit-scrollbar-thumb {
    background: var(--cyber-border);
    border-radius: 4px;
}

.text-editor::-webkit-scrollbar-thumb:hover,
.base64-textarea::-webkit-scrollbar-thumb:hover {
    background: var(--cyber-primary);
}