/* ===================================
   リセット & 基本設定
=================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* カラーパレット - 水色マーブルテーマ */
    --color-primary: #A7DCE9;
    --color-primary-light: #C5E9F2;
    --color-primary-dark: #7BBFCC;
    --color-secondary: #E8F6F9;
    --color-accent: #5BADB8;
    --color-text: #2C3E50;
    --color-text-light: #6B7C8F;
    --color-white: #FFFFFF;
    --color-bg: #F9FCFD;
    --color-border: #E0EEF2;
    
    /* タイポグラフィ */
    --font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.8;
    
    /* スペーシング */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* トランジション */
    --transition: all 0.3s ease;
    
    /* シャドウ */
    --shadow-sm: 0 2px 8px rgba(167, 220, 233, 0.1);
    --shadow-md: 0 4px 16px rgba(167, 220, 233, 0.15);
    --shadow-lg: 0 8px 32px rgba(167, 220, 233, 0.2);
}

html {
    scroll-behavior: smooth;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

/* ===================================
   コンテナ
=================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================
   ヘッダー
=================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.05em;
}

.logo-image {
    height: 40px;
    width: auto;
    display: block;
}

.logo-text {
    display: inline-block;
}

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

.nav-list a {
    color: var(--color-text);
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
}

.nav-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

.nav-list a:hover::after,
.nav-list a.active::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
}

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

/* 背景画像レイヤー */
.hero-bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../images/marble-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
}

/* 画像の上に重ねる半透明オーバーレイ（テキストを読みやすくする） */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        135deg, 
        rgba(167, 220, 233, 0.85) 0%, 
        rgba(232, 246, 249, 0.75) 50%,
        rgba(255, 255, 255, 0.9) 100%
    );
    z-index: 1;
}

/* 動的マーブルエフェクト（装飾用） */
.hero-marble {
    position: absolute;
    top: -10%;
    right: -10%;
    width: 60%;
    height: 120%;
    background: radial-gradient(circle at 30% 50%, 
        rgba(167, 220, 233, 0.3) 0%, 
        rgba(197, 233, 242, 0.2) 30%, 
        transparent 70%);
    border-radius: 50%;
    filter: blur(60px);
    animation: float 20s ease-in-out infinite;
    z-index: 2;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(120deg); }
    66% { transform: translate(-30px, 30px) rotate(240deg); }
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 10;
    padding: var(--spacing-xl) 0;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===================================
   ボタン
=================================== */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    font-size: 1rem;
    box-shadow: var(--shadow-md);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(167, 220, 233, 0.4);
    background: var(--color-primary-light);
    color: var(--color-accent);
}

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

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

.btn-large {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
}

.btn-wrapper {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ===================================
   セクション共通
=================================== */
section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    text-align: center;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.section-title.light {
    color: var(--color-white);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
    letter-spacing: 0.1em;
}

.section-subtitle.light {
    color: rgba(255, 255, 255, 0.8);
}

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

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

.feature-card {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: 20px;
    background: var(--color-bg);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-primary);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

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

/* ===================================
   事業内容ダイジェスト
=================================== */
.business-digest {
    position: relative;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.marble-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        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%);
    pointer-events: none;
}

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

.digest-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: var(--spacing-lg);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.digest-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.digest-number {
    font-size: 3rem;
    font-weight: 700;
    opacity: 0.3;
    margin-bottom: var(--spacing-sm);
}

.digest-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.digest-text {
    line-height: 1.8;
    opacity: 0.9;
}

/* ===================================
   CTAセクション
=================================== */
.cta {
    background: var(--color-secondary);
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.cta-text {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 1.125rem;
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-logo h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
}

.footer-logo p {
    opacity: 0.7;
    font-size: 0.9rem;
}

.footer-nav ul {
    display: flex;
    gap: var(--spacing-md);
    list-style: none;
    flex-wrap: wrap;
}

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

.footer-nav a:hover {
    opacity: 1;
    color: var(--color-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.6;
    font-size: 0.9rem;
}

/* ===================================
   ページヘッダー
=================================== */
.page-header {
    padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-white) 100%);
    text-align: center;
}

.page-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    color: var(--color-text-light);
    font-size: 1.125rem;
    letter-spacing: 0.1em;
}

/* ===================================
   会社概要ページ
=================================== */
.message {
    background: var(--color-white);
    padding: var(--spacing-xl) 0;
}

.message-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.message-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
    line-height: 1.6;
}

.message-text {
    color: var(--color-text-light);
    line-height: 2;
    font-size: 1.0625rem;
}

.company-info {
    background: var(--color-bg);
}

.info-table-wrapper {
    max-width: 900px;
    margin: 0 auto;
    background: var(--color-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.info-table {
    width: 100%;
    border-collapse: collapse;
}

.info-table tr {
    border-bottom: 1px solid var(--color-border);
}

.info-table tr:last-child {
    border-bottom: none;
}

.info-table th,
.info-table td {
    padding: var(--spacing-md);
    text-align: left;
}

.info-table th {
    background: var(--color-secondary);
    color: var(--color-text);
    font-weight: 600;
    width: 200px;
    white-space: nowrap;
}

.info-table td {
    color: var(--color-text-light);
}

.business-list {
    list-style: none;
    padding: 0;
}

.business-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

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

.email-link {
    color: var(--color-accent);
    text-decoration: underline;
}

.email-link:hover {
    color: var(--color-primary-dark);
}

/* ビジョンセクション */
.vision {
    position: relative;
    background: var(--color-white);
}

.marble-bg-light {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 10% 20%, var(--color-secondary) 0%, transparent 50%),
        radial-gradient(circle at 90% 80%, var(--color-primary-light) 0%, transparent 50%);
    opacity: 0.3;
    pointer-events: none;
}

.vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    position: relative;
}

.vision-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 2px solid var(--color-border);
}

.vision-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.vision-card-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

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

/* ===================================
   事業内容ページ
=================================== */
.business-intro {
    background: var(--color-white);
    padding: var(--spacing-lg) 0;
}

.intro-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.intro-text {
    color: var(--color-text-light);
    line-height: 2;
    font-size: 1.0625rem;
}

.business-detail {
    background: var(--color-bg);
}

.business-card {
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
    background: var(--color-white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.business-card:last-child {
    margin-bottom: 0;
}

.business-card-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.business-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-white);
    opacity: 0.5;
}

.marble-line {
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.5) 0%, 
        rgba(255, 255, 255, 0.2) 50%, 
        transparent 100%
    );
}

.business-card-content {
    padding: var(--spacing-lg);
}

.business-card-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.business-card-lead {
    font-size: 1.125rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.business-card-text {
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: var(--spacing-md);
}

.business-features {
    list-style: none;
    padding: 0;
}

.business-features li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--color-text-light);
    border-bottom: 1px solid var(--color-border);
}

.business-features li:last-child {
    border-bottom: none;
}

.business-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
    font-size: 1.25rem;
}

.other-business {
    position: relative;
    background: var(--color-white);
    text-align: center;
}

.other-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.other-text {
    color: var(--color-text-light);
    line-height: 2;
    font-size: 1.0625rem;
}

/* ===================================
   お問い合わせページ
=================================== */
.contact-intro {
    background: var(--color-white);
    padding: var(--spacing-lg) 0;
}

.contact-form-section {
    background: var(--color-bg);
    padding: var(--spacing-xl) 0;
}

.form-wrapper {
    max-width: 700px;
    margin: 0 auto;
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-label {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.required {
    color: #E74C3C;
    font-size: 0.875rem;
}

.optional {
    color: var(--color-text-light);
    font-size: 0.875rem;
    font-weight: 400;
}

.form-input,
.form-select,
.form-textarea {
    padding: 1rem;
    border: 2px solid var(--color-border);
    border-radius: 10px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--color-bg);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-white);
}

.form-textarea {
    resize: vertical;
    min-height: 150px;
}

.form-submit {
    margin-top: var(--spacing-md);
    text-align: center;
}

.form-message {
    padding: var(--spacing-md);
    border-radius: 10px;
    text-align: center;
    margin-top: var(--spacing-md);
}

.form-message.success {
    background: #D4EDDA;
    color: #155724;
    border: 2px solid #C3E6CB;
}

.form-message p {
    margin-bottom: 0.5rem;
}

.form-message p:last-child {
    margin-bottom: 0;
}

.direct-contact {
    position: relative;
    background: var(--color-white);
    text-align: center;
}

.direct-content {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
}

.direct-text {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 1.0625rem;
}

.email-link-large {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem 3rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: var(--color-white);
    border-radius: 50px;
    font-size: 1.25rem;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.email-link-large:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ===================================
   アニメーション
=================================== */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].animated {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   レスポンシブ
=================================== */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .header-content {
        padding: 1rem 0;
    }
    
    .logo-image {
        height: 32px;
    }
    
    .logo a {
        font-size: 1.25rem;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-white);
        box-shadow: var(--shadow-md);
        transform: translateY(-100%);
        transition: transform 0.3s ease;
        opacity: 0;
        visibility: hidden;
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        padding: var(--spacing-md);
        gap: 0;
    }
    
    .nav-list li {
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-list li:last-child {
        border-bottom: none;
    }
    
    .nav-list a {
        display: block;
        padding: 1rem 0;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
    
    .hero {
        min-height: 80vh;
    }
    
    .features-grid,
    .digest-grid,
    .vision-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-nav ul {
        justify-content: center;
    }
    
    .info-table th,
    .info-table td {
        display: block;
        width: 100%;
        padding: var(--spacing-sm);
    }
    
    .info-table th {
        background: var(--color-primary);
        color: var(--color-white);
    }
    
    .info-table tr {
        display: block;
        margin-bottom: var(--spacing-md);
        border: 1px solid var(--color-border);
        border-radius: 10px;
        overflow: hidden;
    }
    
    .sp-only {
        display: inline;
    }
    
    .form-wrapper {
        padding: var(--spacing-md);
    }
}

@media (min-width: 769px) {
    .sp-only {
        display: none;
    }
}