/* ============================================
   リセット & ベーススタイル
   ============================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* カラーパレット */
    --color-primary: #1e40af;
    --color-primary-dark: #1e3a8a;
    --color-primary-light: #3b82f6;
    --color-secondary: #0ea5e9;
    --color-accent: #8b5cf6;
    --color-text: #1f2937;
    --color-text-light: #6b7280;
    --color-background: #ffffff;
    --color-background-alt: #f9fafb;
    --color-border: #e5e7eb;

    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* タイポグラフィ */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN",
                   "Hiragino Sans", Meiryo, sans-serif;
    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-2xl: 3rem;
    --font-size-3xl: 4rem;

    /* シャドウ */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* トランジション */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;

    /* ブレークポイント */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
}

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

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-background);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   ユーティリティクラス
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary-dark);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    margin: var(--spacing-sm) auto 0;
    border-radius: 2px;
}

/* ============================================
   ヘッダー & ナビゲーション
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-primary);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-menu a {
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transform: translateX(-50%);
    transition: width var(--transition-base);
}

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

.nav-menu a:hover::after {
    width: 80%;
}

/* ============================================
   ヒーローセクション
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
        var(--color-primary-dark) 0%,
        var(--color-primary) 50%,
        var(--color-secondary) 100%);
    z-index: -1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    /* animation: backgroundPulse 15s ease-in-out infinite; */
    /* Performance optimization: remove opacity animation on large gradient */
}

/* @keyframes backgroundPulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
} */

.hero-content {
    text-align: center;
    color: white;
    padding: var(--spacing-md);
    max-width: 900px;
    z-index: 1;
}

.badge-container {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.badge {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all var(--transition-base);
}

.badge:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    text-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: var(--font-size-sm);
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

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

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

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 25px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-indicator span {
    width: 6px;
    height: 10px;
    background: white;
    border-radius: 3px;
    animation: scroll 2s ease-in-out infinite;
}

@keyframes scroll {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(20px); opacity: 0; }
}

/* ============================================
   サービスセクション
   ============================================ */
.service-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-background-alt);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.service-card h3 {
    font-size: var(--font-size-lg);
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-md);
}

.price {
    margin: var(--spacing-md) 0;
}

.price-amount {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--color-primary);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-suffix {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
}

.delivery {
    margin: var(--spacing-md) 0;
}

.delivery-time {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, rgba(30, 64, 175, 0.1), rgba(14, 165, 233, 0.1));
    border-radius: 8px;
}

.service-description {
    color: var(--color-text-light);
    line-height: 1.8;
}

.service-list {
    list-style: none;
    text-align: left;
    margin-top: var(--spacing-md);
}

.service-list li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--color-text-light);
}

.service-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background: var(--color-background-alt);
    padding: var(--spacing-lg);
    border-radius: 16px;
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--color-primary-light);
    background: white;
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    display: inline-block;
    transition: transform var(--transition-base);
}

.feature-card:hover .feature-icon {
    transform: scale(1.2) rotate(5deg);
}

.feature-card h3 {
    font-size: var(--font-size-lg);
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ============================================
   会社情報セクション
   ============================================ */
.company-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-background-alt);
}

.company-info {
    max-width: 900px;
    margin: 0 auto;
}

.company-table {
    width: 100%;
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.company-table th,
.company-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.company-table th {
    background: var(--color-background-alt);
    font-weight: 600;
    color: var(--color-primary-dark);
    width: 30%;
}

.company-table td {
    color: var(--color-text);
    line-height: 1.8;
}

.company-table tr:last-child th,
.company-table tr:last-child td {
    border-bottom: none;
}

.company-table tr:hover {
    background: var(--color-background-alt);
}

/* ============================================
   お問い合わせセクション
   ============================================ */
.contact-section {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary), var(--color-secondary));
    color: white;
    text-align: center;
}

.contact-section .section-title {
    color: white;
}

.contact-section .section-title::after {
    background: white;
}

.contact-description {
    font-size: var(--font-size-md);
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    line-height: 1.8;
}

.contact-cta {
    margin-top: var(--spacing-lg);
}

.contact-form-container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: var(--spacing-lg);
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
    text-align: left;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: var(--font-size-sm);
    font-family: inherit;
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.contact-form button {
    width: 100%;
    border: none;
    cursor: pointer;
}

#back-to-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 50px;
    height: 50px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 900;
    display: flex;
    justify-content: center;
    align-items: center;
}

#back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

#back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
}

/* ============================================
   フッター
   ============================================ */
.footer {
    background: var(--color-text);
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer p {
    margin-bottom: var(--spacing-sm);
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.footer-links a {
    color: white;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.footer-links a:hover {
    opacity: 1;
    text-decoration: underline;
}

.footer-links span {
    opacity: 0.5;
}

/* ============================================
   アニメーション
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1s ease forwards;
}

.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.3s; }
.fade-in:nth-child(3) { animation-delay: 0.5s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in {
    opacity: 0;
    transform: translateX(-50px);
    transition: all var(--transition-slow);
}

.slide-in.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================
   レスポンシブデザイン
   ============================================ */

/* タブレット */
@media (max-width: 1024px) {
    :root {
        --font-size-3xl: 3rem;
        --font-size-2xl: 2.5rem;
        --font-size-xl: 1.75rem;
    }

    .service-grid,
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

/* モバイル */
@media (max-width: 768px) {
    :root {
        --font-size-3xl: 2.5rem;
        --font-size-2xl: 2rem;
        --font-size-xl: 1.5rem;
        --font-size-lg: 1.25rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        max-width: 300px;
        height: 100vh;
        background: white;
        flex-direction: column;
        padding-top: 80px;
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-base);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu a {
        width: 100%;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .service-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }

    .company-table {
        font-size: var(--font-size-xs);
    }

    .company-table th,
    .company-table td {
        padding: var(--spacing-sm);
        display: block;
        width: 100%;
    }

    .company-table th {
        background: var(--color-primary-dark);
        color: white;
        border-bottom: none;
    }

    .company-table td {
        padding-bottom: var(--spacing-md);
        border-bottom: 2px solid var(--color-border);
    }

    .price-amount {
        font-size: var(--font-size-2xl);
    }
}

/* 小型モバイル */
@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .section-title {
        font-size: var(--font-size-xl);
    }

    .badge-container {
        gap: var(--spacing-xs);
    }

    .badge {
        font-size: var(--font-size-xs);
        padding: 6px var(--spacing-sm);
    }
}

/* ダークモード対応（オプション） */
@media (prefers-color-scheme: dark) {
    /* 必要に応じてダークモードスタイルを追加 */
}

/* アクセシビリティ：アニメーション無効化 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}