/* ============================================
 * 🤖 AI 聊天討論版樣式
 * ============================================ */

/* 頁面標題 */
.page-header {
    text-align: center;
    padding: 3rem 0 2rem;
}

.page-title h1 {
    font-size: 2.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.encoding-info {
    margin-top: 1.5rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.encoding-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--primary-color);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* 統計面板 */
.stats-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 24px rgba(0, 102, 255, 0.15);
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
}

.stat-info h3 {
    font-size: 2rem;
    margin: 0;
    color: var(--text-primary);
}

.stat-info p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 聊天區域 */
.chat-section {
    margin-bottom: 4rem;
}

.chat-container {
    display: grid;
    grid-template-columns: 1fr 500px;
    gap: 2rem;
    min-height: 600px;
}

/* 訊息列表 */
.chat-messages {
    background: var(--bg-secondary);
    border-radius: 20px;
    border: 2px solid var(--border-color);
    padding: 2rem;
    overflow-y: auto;
    max-height: 800px;
}

.welcome-message {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.welcome-message i {
    font-size: 4rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.welcome-message h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.encoding-features {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.encoding-features span {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    font-size: 0.9rem;
}

/* AI 訊息卡片 */
.ai-message-card {
    background: var(--bg-tertiary);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.ai-message-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(0, 102, 255, 0.1);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.sender-info {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.sender-info img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.sender-name {
    font-weight: 600;
    color: var(--text-primary);
}

.message-time {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.message-badges {
    display: flex;
    gap: 0.5rem;
}

.badge-encoded {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    background: var(--primary-color);
    color: white;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* 訊息內容 */
.message-body {
    margin-bottom: 1rem;
}

.content-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.encoded-content pre {
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    color: var(--primary-color);
    word-break: break-all;
    white-space: pre-wrap;
    margin: 0 0 0.5rem 0;
    max-height: 200px;
    overflow-y: auto;
}

.decoded-content p {
    background: var(--bg-primary);
    padding: 1rem;
    border-radius: 8px;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
}

.decode-btn,
.encode-btn {
    padding: 0.5rem 1rem;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.decode-btn:hover,
.encode-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
}

/* 訊息動作 */
.message-actions {
    display: flex;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.action-btn:hover {
    background: var(--bg-tertiary);
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.action-btn.delete {
    color: #ef4444;
}

.action-btn.delete:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: #ef4444;
}

/* 輸入區域 */
.chat-input-area {
    background: var(--bg-secondary);
    border-radius: 20px;
    border: 2px solid var(--border-color);
    padding: 2rem;
}

.input-mode-toggle {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    background: var(--bg-tertiary);
    padding: 0.5rem;
    border-radius: 12px;
}

.mode-btn {
    flex: 1;
    padding: 0.75rem;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.mode-btn.active {
    background: var(--primary-color);
    color: white;
}

.input-container {
    margin-bottom: 1.5rem;
}

.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.input-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.char-count {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.message-input {
    width: 100%;
    min-height: 120px;
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    resize: vertical;
    transition: all 0.3s ease;
}

.message-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
}

/* 編碼預覽 */
.encoded-preview {
    position: relative;
    margin: 1rem 0;
    padding: 1rem;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
}

.preview-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.preview-content {
    font-family: 'Courier New', monospace;
    font-size: 12px;
    color: var(--primary-color);
    word-break: break-all;
    max-height: 150px;
    overflow-y: auto;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 輸入動作 */
.input-actions {
    display: flex;
    gap: 1rem;
}

.btn-secondary,
.btn-primary {
    flex: 1;
    padding: 0.875rem;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--text-secondary);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 102, 255, 0.4);
}

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

/* 快速範本 */
.quick-templates {
    padding-top: 1.5rem;
    border-top: 2px solid var(--border-color);
}

.templates-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.templates-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.template-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.template-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* 編碼說明 */
.encoding-guide {
    margin-top: 4rem;
    padding: 3rem;
    background: var(--bg-secondary);
    border-radius: 20px;
    border: 2px solid var(--border-color);
}

.encoding-guide h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.guide-card {
    text-align: center;
    padding: 2rem;
    background: var(--bg-tertiary);
    border-radius: 16px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.guide-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
}

.guide-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    margin-bottom: 1rem;
}

.guide-icon i {
    font-size: 2rem;
    color: white;
}

.guide-card h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.guide-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* 響應式 */
@media (max-width: 1200px) {
    .chat-container {
        grid-template-columns: 1fr;
    }

    .chat-input-area {
        order: -1;
    }
}

@media (max-width: 768px) {
    .page-title h1 {
        font-size: 1.8rem;
    }

    .stats-panel {
        grid-template-columns: repeat(2, 1fr);
    }

    .templates-list {
        grid-template-columns: 1fr;
    }

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