/* 新宿間税会 間税相談AI スタイルシート */

/* ========================================
   変数定義
======================================== */
:root {
    --primary-color: #2c5aa0;      /* 落ち着いた青 */
    --secondary-color: #f8f9fa;    /* 薄いグレー */
    --accent-color: #28a745;       /* 安心感のある緑 */
    --danger-color: #dc3545;       /* エラー赤 */
    --text-color: #333333;         /* ダークグレー */
    --text-light: #6c757d;         /* ライトグレー */
    --border-color: #dee2e6;       /* ボーダー */
    --background-color: #ffffff;   /* 白背景 */
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 8px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

/* ========================================
   リセット・基本スタイル
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    text-decoration: underline;
}

/* ========================================
   レイアウト
======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   ヘッダー
======================================== */
.main-header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 0;
    box-shadow: var(--shadow);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-title {
    font-size: 1.5rem;
    margin: 0;
}

.site-title a {
    color: white;
    text-decoration: none;
}

.main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2rem;
}

.main-nav a {
    color: white;
    opacity: 0.9;
    transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    opacity: 1;
    text-decoration: none;
}

/* ========================================
   メインコンテンツ
======================================== */
.kanzei-ai-main {
    min-height: calc(100vh - 200px);
    padding: 3rem 0;
    background-color: var(--secondary-color);
}

/* ページタイトル */
.page-title {
    text-align: center;
    margin-bottom: 3rem;
}

.page-title h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.lead-text {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.ai-notice {
    background-color: #e8f4fd;
    border-left: 4px solid var(--primary-color);
    padding: 1rem 1.5rem;
    border-radius: 4px;
    max-width: 800px;
    margin: 0 auto;
}

/* ========================================
   質問セクション
======================================== */
.question-section {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.question-section h2 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.question-form {
    margin-bottom: 2rem;
}

#questionInput {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    resize: vertical;
    transition: var(--transition);
}

#questionInput:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.submit-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.submit-btn:hover {
    background-color: #1e3a6f;
    transform: translateY(-1px);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.clear-btn {
    background-color: white;
    color: var(--text-light);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.clear-btn:hover {
    background-color: var(--secondary-color);
}

/* スピナー */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========================================
   クイック質問
======================================== */
.quick-questions {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.quick-questions h3 {
    color: var(--text-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.quick-btn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.quick-btn {
    background-color: white;
    border: 2px solid var(--border-color);
    padding: 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.quick-btn:hover {
    border-color: var(--primary-color);
    background-color: #f0f7ff;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.quick-btn .icon {
    font-size: 1.5rem;
}

/* ========================================
   回答セクション
======================================== */
.answer-section {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    animation: fadeIn 0.5s ease;
}

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

.answer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.answer-header h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.answer-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

.answer-text {
    line-height: 1.8;
    color: var(--text-color);
    white-space: pre-wrap;
}

/* ========================================
   参考資料
======================================== */
.answer-sources {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.answer-sources h4 {
    color: var(--text-color);
    margin-bottom: 1rem;
}

.sources-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.source-item {
    padding: 0.5rem 1rem;
    background-color: var(--secondary-color);
    border-radius: 4px;
    font-size: 0.9rem;
}

/* ========================================
   フィードバック
======================================== */
.answer-feedback {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--secondary-color);
    border-radius: 4px;
    text-align: center;
}

.feedback-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.feedback-btn {
    background-color: white;
    border: 2px solid var(--border-color);
    padding: 0.5rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.feedback-positive:hover {
    border-color: var(--accent-color);
    background-color: #e8f5e9;
}

.feedback-negative:hover {
    border-color: var(--danger-color);
    background-color: #ffebee;
}

.feedback-message {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 4px;
    font-size: 0.9rem;
}

.feedback-message.success {
    background-color: #d4edda;
    color: #155724;
}

/* ========================================
   関連質問
======================================== */
.related-questions {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #f0f7ff;
    border-radius: 4px;
}

.related-questions h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.related-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.related-item {
    padding: 0.75rem;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.related-item:hover {
    border-color: var(--primary-color);
    transform: translateX(5px);
}

/* ========================================
   検索履歴
======================================== */
.search-history {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.history-header h3 {
    color: var(--text-color);
}

.clear-history-btn {
    background-color: white;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.clear-history-btn:hover {
    background-color: var(--danger-color);
    color: white;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.history-item {
    padding: 1rem;
    background-color: var(--secondary-color);
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.history-item:hover {
    background-color: #e8f4fd;
    transform: translateX(5px);
}

.history-time {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ========================================
   使い方ガイド
======================================== */
.usage-guide {
    background-color: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.usage-guide h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

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

.guide-item {
    text-align: center;
}

.guide-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.guide-item p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ========================================
   フッター
======================================== */
.main-footer {
    background-color: #2c3e50;
    color: white;
    padding: 2rem 0 1rem;
}

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

.footer-info h4,
.footer-links h4 {
    margin-bottom: 1rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ========================================
   レスポンシブ対応
======================================== */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    .page-title h1 {
        font-size: 2rem;
    }
    
    .quick-btn-grid {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .submit-btn,
    .clear-btn {
        width: 100%;
    }
    
    .answer-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .guide-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 14px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .page-title h1 {
        font-size: 1.5rem;
    }
    
    .lead-text {
        font-size: 1rem;
    }
    
    .question-section,
    .answer-section,
    .search-history,
    .usage-guide {
        padding: 1.5rem;
    }
}