/* ===== CSS Variables ===== */
:root {
    /* カラーパレット */
    --color-primary: #2D5016;     /* 深緑 */
    --color-secondary: #B8860B;   /* 金茶 */
    --color-accent: #CC5500;      /* 朱色 */
    --color-bg: #FAF7F0;          /* オフホワイト */
    --color-white: #FFFFFF;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-border: #E0E0E0;
    
    /* フォント */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-size-base: 16px;
    --font-size-large: 20px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;
    
    /* スペーシング */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    
    /* その他 */
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

/* ===== リセットCSS ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
}

img {
    max-width: 100%;
    height: auto;
    content-visibility: auto;
    contain: size layout;
}

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

ul {
    list-style: none;
}

/* ===== 共通クラス ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section-title {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
}

.section-subtitle {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-light);
}

/* ===== ボタン ===== */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: #1a3009;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: #9a7209;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-large);
}

/* ===== ヘッダー ===== */
.header {
    background-color: var(--color-white);
    box-shadow: var(--box-shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo h1 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: 4px;
}

.tagline {
    font-size: 14px;
    color: var(--color-text-light);
}

.nav-list {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-list a {
    font-weight: 500;
    color: var(--color-text);
}

.nav-list a:hover {
    color: var(--color-primary);
}

.btn-contact {
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
}

.btn-contact:hover {
    background-color: #aa4400;
}

/* ハンバーガーメニュー（モバイル用） */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--color-primary);
    margin: 3px 0;
    transition: var(--transition);
}

/* ===== ヒーローセクション ===== */
.hero {
    margin-top: 80px; /* ヘッダー分のマージン */
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--color-bg) 0%, #f0ede5 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.hero-title {
    font-size: var(--font-size-xxl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.sub-title {
    display: block;
    font-size: var(--font-size-large);
    color: var(--color-secondary);
    margin-top: var(--spacing-sm);
}

.hero-description {
    font-size: var(--font-size-large);
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-light);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.hero-image img {
    width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* ===== 特徴セクション ===== */
.features {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.feature-item {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    background-color: var(--color-bg);
    transition: var(--transition);
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background-color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon img {
    width: 40px;
    height: 40px;
    filter: brightness(0) invert(1);
}

.feature-item h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.feature-item p {
    color: var(--color-text-light);
}

/* ===== 施工事例セクション ===== */
.works {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-bg);
}

.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.work-item {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

.work-item:hover {
    transform: translateY(-5px);
}

.work-image img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.work-info {
    padding: var(--spacing-md);
}

.work-info h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.work-info p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.work-area {
    font-size: 14px;
    color: var(--color-secondary);
    font-weight: 600;
}

.works-button {
    text-align: center;
}

/* ===== お客様の声セクション ===== */
.voice {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-white);
}

.voice-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.voice-item {
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    position: relative;
}

.voice-item::before {
    content: '"';
    font-size: 48px;
    color: var(--color-secondary);
    position: absolute;
    top: 10px;
    left: 20px;
    line-height: 1;
}

.voice-content p {
    font-style: italic;
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.voice-author {
    text-align: right;
}

.name {
    display: block;
    font-weight: 600;
    color: var(--color-primary);
}

.family {
    font-size: 14px;
    color: var(--color-text-light);
}

/* ===== CTAセクション ===== */
.cta {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, #1a3009 100%);
    color: var(--color-white);
    text-align: center;
}

.cta-title {
    font-size: var(--font-size-xxl);
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: var(--font-size-large);
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.cta-contact {
    text-align: center;
}

.phone {
    margin-bottom: var(--spacing-xs);
}

.phone-number {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-xs);
}

.phone-time {
    font-size: 14px;
    opacity: 0.8;
}

/* ===== フッター ===== */
.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-company h3 {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xl);
}

.footer-company p {
    margin-bottom: var(--spacing-md);
    opacity: 0.9;
}

.footer-contact p {
    margin-bottom: var(--spacing-xs);
    font-size: 14px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.footer-links h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-secondary);
}

.footer-links ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    opacity: 0.7;
}

/* アニメーション */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

@keyframes slideInLeft {
    from {
        transform: translateX(-20px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(20px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* アニメーション適用 */
.page-header {
    animation: fadeInUp 1s ease-out;
}

.section-title {
    animation: fadeInUp 1s ease-out;
}

.info-grid {
    animation: fadeIn 1.5s ease-out;
}

.philosophy-item {
    animation: scaleIn 1s ease-out;
    animation-fill-mode: both;
}

.philosophy-item:nth-child(1) {
    animation-delay: 0.2s;
}

.philosophy-item:nth-child(2) {
    animation-delay: 0.4s;
}

.philosophy-item:nth-child(3) {
    animation-delay: 0.6s;
}

.achievement-item {
    animation: scaleIn 1s ease-out;
    animation-fill-mode: both;
}

.achievement-item:nth-child(1) {
    animation-delay: 0.2s;
}

.achievement-item:nth-child(2) {
    animation-delay: 0.4s;
}

.achievement-item:nth-child(3) {
    animation-delay: 0.6s;
}

.awards {
    animation: fadeInUp 1s ease-out;
    animation-delay: 0.8s;
    animation-fill-mode: both;
}

.staff-item {
    animation: scaleIn 1s ease-out;
    animation-fill-mode: both;
}

.staff-item:nth-child(1) {
    animation-delay: 0.2s;
}

.staff-item:nth-child(2) {
    animation-delay: 0.4s;
}

.staff-item:nth-child(3) {
    animation-delay: 0.6s;
}

/* ホバーエフェクト */
.achievement-item:hover {
    transform: translateY(-5px);
    transition: transform 0.3s ease;
}

.staff-item:hover {
    transform: translateY(-5px);
    transition: transform 0.3s ease;
}

.staff-image img {
    transition: transform 0.3s ease;
}

.staff-item:hover .staff-image img {
    transform: scale(1.05);
}

/* スクロールアニメーション */
.scroll-animation {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
}

.scroll-animation.visible {
    opacity: 1;
    transform: translateY(0);
}

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

/* 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;
        scroll-behavior: auto !important;
    }
}

/* キーボードフォーカス */
:focus {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* 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;
}

/* モーダル */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 800px;
    margin: auto;
    background: #fff;
    border-radius: 8px;
    padding: 40px;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal.active .modal-content {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.modal-close:hover {
    transform: rotate(90deg);
}

.modal-close::before,
.modal-close::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 2px;
    background: #333;
}

.modal-close::before {
    transform: translate(-50%, -50%) rotate(45deg);
}

.modal-close::after {
    transform: translate(-50%, -50%) rotate(-45deg);
}

.modal-header {
    margin-bottom: 30px;
}

.modal-title {
    font-size: 2rem;
    color: #333;
    margin-bottom: 10px;
}

.modal-subtitle {
    font-size: 1.2rem;
    color: #666;
}

.modal-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.modal-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 4px;
}

.modal-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.modal-info-item {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.modal-info-label {
    font-size: 0.9rem;
    color: #666;
}

.modal-info-value {
    font-size: 1.1rem;
    color: #333;
}

.modal-description {
    margin-top: 30px;
    line-height: 1.8;
    color: #333;
}

@media (max-width: 768px) {
    .modal-content {
        padding: 20px;
    }

    .modal-body {
        grid-template-columns: 1fr;
    }

    .modal-image {
        height: 200px;
    }
}

/* モーダルアニメーション */
@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-content {
    animation: modalFadeIn 0.3s ease forwards;
}

/* アクセシビリティ */
.modal:focus {
    outline: none;
}

.modal-content:focus {
    outline: 2px solid #4A90E2;
    outline-offset: 2px;
}

/* モバイル対応 */
@media (max-width: 480px) {
    .modal-content {
        width: 95%;
        padding: 15px;
    }

    .modal-title {
        font-size: 1.5rem;
    }

    .modal-subtitle {
        font-size: 1rem;
    }
}

/* パフォーマンス最適化 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* アニメーションの最適化 */
.animate {
    will-change: transform, opacity;
}

/* スクロールパフォーマンスの最適化 */
.smooth-scroll {
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

/* レンダリングの最適化 */
.optimize-rendering {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* メモリ使用量の最適化 */
.optimize-memory {
    contain: content;
}

/* モバイル最適化 */
@media (max-width: 768px) {
    .nav-list {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        width: 100vw;
        background: #fff;
        flex-direction: column;
        gap: 0;
        box-shadow: 0 2px 10px rgba(0,0,0,0.08);
        z-index: 9999;
    }
    .nav-list.active {
        display: flex;
    }
    .nav-list li {
        border-bottom: 1px solid #eee;
        text-align: center;
        padding: 18px 0;
    }
    .nav-list li:last-child {
        border-bottom: none;
    }
    .hamburger {
        display: flex;
        z-index: 10001;
    }
    .header-content {
        padding: 10px 0;
    }
}

/* プリント最適化 */
@media print {
    .no-print {
        display: none !important;
    }
    
    .print-optimize {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* アクセシビリティ最適化 */
@media (prefers-contrast: more) {
    * {
        color: #000 !important;
        background: #fff !important;
    }
    
    img {
        filter: contrast(1.2) !important;
    }
}

/* ダークモード最適化 */
@media (prefers-color-scheme: dark) {
    .dark-mode {
        color: #fff;
        background: #1a1a1a;
    }
    
    .dark-mode img {
        filter: brightness(0.8) contrast(1.2);
    }
}

/* フォント最適化 */
@font-face {
    font-family: 'Noto Sans JP';
    font-display: swap;
    src: local('Noto Sans JP'),
         url('../fonts/NotoSansJP-Regular.woff2') format('woff2');
}

/* レイアウト最適化 */
.optimize-layout {
    contain: layout style paint;
}

/* アニメーションフレーム最適化 */
@keyframes optimizedFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.optimized-animation {
    animation: optimizedFadeIn 0.3s ease-out forwards;
    will-change: transform, opacity;
}

/* スクロール最適化 */
.optimize-scroll {
    overscroll-behavior: contain;
    scroll-snap-type: y proximity;
}

/* 画像読み込み最適化 */
.lazy-load {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

.lazy-load.loaded {
    opacity: 1;
}

/* メモリ使用量の最適化 */
.optimize-memory-usage {
    contain: strict;
    content-visibility: auto;
}

/* レンダリングパフォーマンスの最適化 */
.optimize-rendering-performance {
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    perspective: 1000px;
    will-change: transform;
}

/* アニメーションパフォーマンスの最適化 */
.optimize-animation-performance {
    transform: translateZ(0);
    will-change: transform;
}

/* スクロールパフォーマンスの最適化 */
.optimize-scroll-performance {
    transform: translateZ(0);
    will-change: transform;
    backface-visibility: hidden;
}

/* 画像パフォーマンスの最適化 */
.optimize-image-performance {
    content-visibility: auto;
    contain: size layout;
    will-change: transform;
}

/* レイアウトパフォーマンスの最適化 */
.optimize-layout-performance {
    contain: layout style paint;
    content-visibility: auto;
    will-change: transform;
}

/* アニメーションフレームの最適化 */
@keyframes optimizedScale {
    from {
        transform: scale(0.95);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.optimized-scale {
    animation: optimizedScale 0.3s ease-out forwards;
    will-change: transform, opacity;
}

/* スクロールスナップの最適化 */
.optimize-scroll-snap {
    scroll-snap-type: y mandatory;
    scroll-snap-align: start;
    scroll-snap-stop: always;
}

/* 画像読み込みの最適化 */
.optimize-image-loading {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

.optimize-image-loading.loaded {
    opacity: 1;
}

/* メモリ使用量の最適化 */
.optimize-memory-usage {
    contain: strict;
    content-visibility: auto;
    will-change: transform;
}

/* レンダリングパフォーマンスの最適化 */
.optimize-rendering-performance {
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
    perspective: 1000px;
    will-change: transform;
}

/* アニメーションパフォーマンスの最適化 */
.optimize-animation-performance {
    transform: translateZ(0);
    will-change: transform;
}

/* スクロールパフォーマンスの最適化 */
.optimize-scroll-performance {
    transform: translateZ(0);
    will-change: transform;
    backface-visibility: hidden;
}

/* 画像パフォーマンスの最適化 */
.optimize-image-performance {
    content-visibility: auto;
    contain: size layout;
    will-change: transform;
}

/* レイアウトパフォーマンスの最適化 */
.optimize-layout-performance {
    contain: layout style paint;
    content-visibility: auto;
    will-change: transform;
}