/* スキップリンク（スクリーンリーダー用） */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 10000;
    border-radius: 4px;
}

.skip-link:focus {
    top: 6px;
}

/* メインコンテンツエリアの改善 */
main {
    min-height: calc(100vh - 140px);
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
}

/* セクション共通スタイル */

section h2 {
    font-size: var(--font-size-xxl);
    color: var(--primary-color);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
    font-weight: 700;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

/* ===== ヒーローセクション ===== */
.hero-section {
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.hero-content {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(0, 62, 94, 0.8) 0%,
        rgba(0, 90, 158, 0.6) 50%,
        rgba(128, 192, 255, 0.4) 100%
    );
}

.hero-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

.hero-text-container {
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 60px 20px;
    z-index: 3;
}

.hero-title {
    margin: 0 0 24px 0;
    line-height: 1.2;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.3;
    transition: var(--transition);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg,
        rgba(0, 62, 94, 0.8) 0%,
        rgba(0, 90, 158, 0.6) 50%,
        rgba(128, 192, 255, 0.4) 100%
    );
    z-index: 2;
}

.hero-title-main {
    display: block;
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    margin-bottom: 12px;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
    letter-spacing: 0.02em;
    animation: slideInUp 1s ease-out;
}

.hero-title-sub {
    display: block;
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-weight: 300;
    opacity: 0.9;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
    animation: slideInUp 1s ease-out 0.2s both;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin: 0;
    opacity: 0.95;
    line-height: 1.8;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
    animation: slideInUp 1s ease-out 0.4s both;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 挨拶セクションの改善 */
.greeting {
    background: var(--background-color);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-medium);
    margin: var(--spacing-xxl) auto;
    max-width: 1000px;
    position: relative;
    overflow: hidden;
}

.greeting::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.greeting-content {
    display: grid;
    gap: var(--spacing-lg);
    align-items: start;
}

.greeting-text {
    font-size: var(--font-size-large);
    line-height: 1.8;
    color: var(--text-color);
}

.greeting-text p {
    margin-bottom: var(--spacing-md);
}

.signature {
    text-align: right;
    color: var(--text-light);
    font-weight: 600;
    margin-top: var(--spacing-lg) !important;
    position: relative;
}

.signature::before {
    content: '';
    position: absolute;
    top: -8px;
    right: 0;
    width: 100px;
    height: 2px;
    background: var(--accent-color);
}

/* 沿革セクションの改善 */
.history {
    background: var(--background-light);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-xl);
    margin: var(--spacing-xxl) auto;
    max-width: 1000px;
    position: relative;
    box-shadow: var(--shadow-medium);
}

.history::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: var(--border-radius-large) var(--border-radius-large) 0 0;
}

.history ul {
    list-style: none;
    padding: 0;
    margin: 0;
    position: relative;
}

.history ul::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.history li {
    position: relative;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) var(--spacing-xxl);
    margin-bottom: var(--spacing-md);
    background: var(--background-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border-left: 4px solid transparent;
}

.history li:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-medium);
    border-left-color: var(--accent-color);
}

.history li::before {
    content: '';
    position: absolute;
    left: -32px;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    background: var(--background-color);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    z-index: 1;
}

.history li strong {
    color: var(--primary-color);
    font-weight: 700;
    display: inline-block;
    margin-right: var(--spacing-sm);
    font-size: var(--font-size-base);
}

/* 会社情報コンテナの改善 */
.company-info-container {
    background: var(--background-color);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-xl);
    margin: var(--spacing-xxl) auto;
    max-width: 1000px;
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.company-info-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.company-info-item {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: var(--spacing-md);
    align-items: start;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
    border-left: 4px solid transparent;
}

.company-info-item:hover {
    background: var(--background-light);
    border-left-color: var(--accent-color);
}

.company-info-item strong {
    color: var(--primary-color);
    font-weight: 700;
    font-size: var(--font-size-base);
    display: flex;
    align-items: center;
    min-height: 24px;
}

.company-info-item p,
.company-info-item ul {
    margin: 0;
    color: var(--text-color);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

.company-info-item ul {
    padding-left: var(--spacing-md);
}

.company-info-item ul li {
    margin-bottom: var(--spacing-xs);
    position: relative;
}

.company-info-item ul li::before {
    content: '▸';
    color: var(--accent-color);
    font-weight: bold;
    position: absolute;
    left: -16px;
}

/* マップコンテナの改善 */
.map-container {
    margin: var(--spacing-xxl) auto;
    max-width: 1000px;
    border-radius: var(--border-radius-large);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    position: relative;
}

.map-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    z-index: 1;
}

.map-container iframe {
    width: 100%;
    height: 400px;
    border: none;
    display: block;
}

/* 最寄り駅情報の改善 */
.nearest-station {
    background: var(--background-color);
    border-radius: var(--border-radius-large);
    padding: var(--spacing-xl);
    margin: var(--spacing-lg) auto;
    max-width: 1000px;
    text-align: center;
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.nearest-station::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.nearest-station h3 {
    color: var(--primary-color);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    position: relative;
}

.nearest-station h3::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: var(--accent-color);
    border-radius: 2px;
}

.nearest-station p {
    color: var(--text-color);
    font-size: var(--font-size-large);
    line-height: 1.8;
    margin: 0;
}

/* レスポンシブデザインの改善 */
@media (max-width: 768px) {
    :root {
        --spacing-xs: 6px;
        --spacing-sm: 12px;
        --spacing-md: 16px;
        --spacing-lg: 24px;
        --spacing-xl: 32px;
        --spacing-xxl: 48px;
    }

    section {
        padding: 0 var(--spacing-sm);
    }

    .greeting,
    .history,
    .company-info-container,
    .nearest-station {
        margin: var(--spacing-lg) var(--spacing-sm);
        padding: var(--spacing-lg);
    }

    .company-info-item {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .company-info-item strong {
        border-bottom: 2px solid var(--accent-color);
        padding-bottom: var(--spacing-xs);
        margin-bottom: var(--spacing-xs);
    }

    .history ul::before {
        left: 15px;
    }

    .history li {
        padding-left: var(--spacing-xl);
    }

    .history li::before {
        left: -27px;
    }

    .home-image-container {
        height: 40vh;
        min-height: 300px;
    }

    .image-text h1 {
        font-size: clamp(1.5rem, 8vw, 2.5rem);
    }
}

/* 印刷スタイル */
@media print {
    .home-image-container,
    .map-container {
        display: none;
    }
    
    section {
        break-inside: avoid;
        margin: 20px 0;
    }
    
    .history li {
        break-inside: avoid;
    }
}

/* アニメーション設定の改善 */
@keyframes slideInFromLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInFromRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* フェードイン要素の改善 */
.fade-in-element {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-element.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 遅延アニメーション */
.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

/* 高コントラストモード対応 */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #000000;
        --secondary-color: #0066cc;
        --text-color: #000000;
        --background-color: #ffffff;
        --border-color: #000000;
    }
    
    .history li,
    .company-info-item,
    .greeting,
    .nearest-station {
        border: 2px solid var(--border-color);
    }
}

/* 動きを減らす設定への対応 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .fade-in-element {
        opacity: 1;
        transform: none;
    }
}

/* セマンティックな強調表示 */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

/* ライブリージョン（スクリーンリーダー用） */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* フォーカス表示の改善 */
.focus-visible {
    outline: 3px solid var(--secondary-color);
    outline-offset: 2px;
}

/* カスタムスクロールバー */
::-webkit-scrollbar {
    width: 8px;
}

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

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

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