/* 拡張版スタイルシート - モダンUI */
:root {
    --primary-color: #10a37f;
    --primary-dark: #0d8968;
    --primary-light: #12b98f;
    --secondary-color: #6b7280;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

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

.container {
    display: flex;
    height: 100vh;
    background: var(--bg-primary);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.1);
}

/* サイドバー */
.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    background: white;
}

.new-chat-btn {
    width: 100%;
    padding: 12px 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.new-chat-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 163, 127, 0.3);
}

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

/* チャット履歴 */
.chat-history {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
}

.chat-item {
    padding: 12px 16px;
    margin-bottom: 6px;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    background: white;
}

.chat-item:hover {
    background: var(--bg-tertiary);
    transform: translateX(4px);
}

.chat-item-title {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chat-item-date {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.chat-delete-btn {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    opacity: 0;
    transition: all 0.2s ease;
    font-size: 18px;
}

.chat-item:hover .chat-delete-btn {
    opacity: 1;
}

.chat-delete-btn:hover {
    background: var(--danger-color);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

/* サイドバーフッター */
.sidebar-footer {
    padding: 15px;
    border-top: 1px solid var(--border-color);
    background: white;
}

.model-selector {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.model-selector label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#modelSelect {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: white;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

#modelSelect:hover {
    border-color: var(--primary-color);
}

#modelSelect:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(16, 163, 127, 0.1);
}

/* メインチャット */
.main-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: white;
}

.chat-header {
    padding: 20px 30px;
    background: linear-gradient(135deg, #ffffff 0%, var(--bg-secondary) 100%);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h1 {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border-radius: 20px;
}

.status::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #10b981;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status.error::before {
    background: var(--danger-color);
}

/* メッセージエリア */
.messages {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
    background: linear-gradient(to bottom, var(--bg-secondary), white);
}

.welcome-message {
    text-align: center;
    padding: 60px 30px;
    max-width: 600px;
    margin: 0 auto;
}

.welcome-aiyu {
    width: 120px;
    height: 120px;
    object-fit: contain;
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.welcome-message h2 {
    font-size: 32px;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.welcome-message p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.6;
}

.welcome-message .info {
    margin-top: 40px;
    padding: 20px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    text-align: left;
}

.quick-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 30px;
}

.quick-actions button {
    padding: 10px 20px;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.quick-actions button:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    color: white;
    transform: translateY(-2px);
}

/* メッセージ */
.message {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(30, 58, 138, 0.15);
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message.user .message-avatar {
    background: var(--gradient-primary);
    color: white;
    border: 2px solid white;
}

.message.assistant .message-avatar {
    background: white;
    border: 2px solid var(--primary-color);
    padding: 3px;
}

.message-content {
    flex: 1;
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 15px;
    line-height: 1.6;
}

.message.user .message-content {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-bottom-right-radius: 4px;
}

.message.assistant .message-content {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-bottom-left-radius: 4px;
}

.message-timestamp {
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* 入力エリア */
.input-controls {
    padding: 12px 20px;
    background: linear-gradient(to bottom, var(--bg-secondary), white);
    border-top: 1px solid var(--border-color);
}

.feature-toggles {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.toggle-btn {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: white;
    color: var(--text-secondary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s ease;
    font-size: 13px;
    font-weight: 500;
    position: relative;
}

.toggle-btn svg {
    width: 18px;
    height: 18px;
    transition: transform 0.3s ease;
}

.toggle-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.toggle-btn.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border-color: var(--primary-dark);
    box-shadow: 0 2px 8px rgba(16, 163, 127, 0.3);
}

.toggle-btn.active svg {
    transform: scale(1.1);
}

.knowledge-status {
    display: none;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
    border: 1px solid #7dd3fc;
    border-radius: 20px;
    font-size: 12px;
    color: #0369a1;
    margin-bottom: 10px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.input-area {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

#messageInput {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 16px;
    resize: none;
    font-size: 15px;
    min-height: 48px;
    max-height: 120px;
    transition: all 0.3s ease;
    background: white;
}

#messageInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(16, 163, 127, 0.1);
}

#sendButton {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

#sendButton:hover:not(:disabled) {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(16, 163, 127, 0.4);
}

#sendButton:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#sendButton svg {
    width: 20px;
    height: 20px;
}

.voice-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
}

.voice-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: scale(1.1);
}

.voice-btn.recording {
    background: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

/* タイピングインジケーター */
.typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: linear-gradient(135deg, #f5f7fa 0%, #e9ecef 100%);
    border-radius: 12px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.typing-indicator .typing-dot {
    display: block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    animation: typing-wave 1.2s infinite;
}

.typing-indicator .typing-dot:nth-child(2) {
    animation-delay: 0.15s;
}

.typing-indicator .typing-dot:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes typing-wave {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-10px);
        opacity: 1;
    }
}

/* スクロールバー */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* コードブロックのスタイル（ChatGPT風） */
.code-block-wrapper {
    margin: 16px 0;
    border-radius: 8px;
    overflow: hidden;
    background: #1e293b;
    border: 1px solid #334155;
}

.code-block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: #0f172a;
    border-bottom: 1px solid #334155;
}

.code-language {
    font-size: 12px;
    color: #94a3b8;
    font-weight: 500;
    text-transform: lowercase;
}

.copy-code-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    background: transparent;
    border: 1px solid #475569;
    border-radius: 4px;
    color: #cbd5e1;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-code-btn:hover {
    background: #334155;
    border-color: #64748b;
    color: #f1f5f9;
}

.code-block-wrapper pre {
    margin: 0;
    padding: 16px;
    overflow-x: auto;
    background: #1e293b;
}

.code-block-wrapper code {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.6;
    color: #f1f5f9;
    background: transparent;
    padding: 0;
}

/* インラインコード */
.message-content code:not([class*="language-"]) {
    padding: 2px 6px;
    background: rgba(107, 114, 128, 0.2);
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--primary-color);
}

/* シンタックスハイライト（基本） */
.language-javascript,
.language-js,
.language-python,
.language-py,
.language-css,
.language-html,
.language-json {
    color: #e2e8f0;
}

/* ファイル添付ボタン */
.file-attach-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: white;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
}

.file-attach-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: scale(1.1);
}

.file-attach-btn input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

/* ファイルプレビュー */
.file-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
    padding: 12px;
    background: var(--bg-tertiary);
    border-radius: 8px;
}

.file-preview-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 13px;
}

.file-preview-item .remove-file {
    cursor: pointer;
    color: var(--danger-color);
    font-weight: bold;
}

/* レスポンシブ */
@media (max-width: 768px) {
    .sidebar {
        width: 0;
        position: absolute;
        z-index: 1000;
        height: 100vh;
    }
    
    .sidebar.open {
        width: 280px;
    }
    
    .message-content {
        max-width: 85%;
    }
}