/**
 * Common Styles
 * 共通スタイルシート
 * @version 1.0
 */

/* リセットとベーススタイル */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

/* コンテナ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ページラッパー */
.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding: 20px 0;
}

/* ヘッダー */
.site-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.site-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: white;
}

.site-title:hover {
    opacity: 0.9;
}

/* ナビゲーション */
.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.nav-links a:hover {
    opacity: 0.8;
}

/* フッター */
.site-footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: auto;
}

.footer-content {
    font-size: 0.9rem;
}

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

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* カード */
.card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

/* ツールグリッド */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.tool-card {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    border-color: #667eea;
}

.tool-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.tool-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.tool-description {
    color: #666;
    line-height: 1.5;
}

/* アラート */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    border-left: 4px solid;
}

.alert-info {
    background: #e3f2fd;
    border-color: #2196f3;
    color: #1565c0;
}

.alert-warning {
    background: #fff3e0;
    border-color: #ff9800;
    color: #e65100;
}

.alert-error {
    background: #ffebee;
    border-color: #f44336;
    color: #c62828;
}

.alert-success {
    background: #e8f5e9;
    border-color: #4caf50;
    color: #2e7d32;
}

/* レスポンシブデザイン */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .tool-card {
        padding: 1.5rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .card {
        padding: 1rem;
    }
    
    .tool-card {
        padding: 1rem;
    }
    
    .tool-icon {
        font-size: 2.5rem;
    }
}

/* アクセシビリティ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* フォーカススタイル */
*:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* 印刷スタイル */
@media print {
    .site-header,
    .site-footer,
    .nav-links {
        display: none;
    }
    
    body {
        background: white;
    }
    
    .card,
    .tool-card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}