/* ==========================================
   エターナルステラー コーポレートサイト
   テーマ: 美しい星空、安心して眠ることができる
   ========================================== */

/* ==========================================
   カラーパレット
   ========================================== */
:root {
    /* メインカラー */
    --primary-gold: #d4af37;
    --secondary-gold: #f4e4b7;
    --light-gold: #faf7ed;
    
    --primary-blue: #5b7c99;
    --secondary-blue: #405d7a;
    --light-blue: #8da9c4;
    
    /* 夜空カラー */
    --night-sky: #0a0e27;
    --deep-night: #050812;
    --twilight: #1a1f3a;
    
    /* ニュートラルカラー */
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --medium-gray: #888888;
    --dark-gray: #333333;
    
    /* フォント */
    --font-serif: 'Noto Serif JP', serif;
    --font-sans: 'Noto Sans JP', sans-serif;
    
    /* スペーシング */
    --section-padding: 100px;
    --container-max-width: 1200px;
    
    /* トランジション */
    --transition-smooth: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--dark-gray);
    line-height: 1.8;
    overflow-x: hidden;
    background-color: var(--white);
}

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

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

ul {
    list-style: none;
}

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

/* ==========================================
   セクション共通スタイル
   ========================================== */
section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--secondary-blue);
    margin-bottom: 20px;
}

.title-underline {
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-gold), var(--secondary-gold));
    margin: 0 auto 20px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--medium-gray);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ==========================================
   ナビゲーション
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: #ffffff;
    backdrop-filter: blur(10px);
    padding: 10px 0;
    z-index: 1000;
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo img {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    gap: 40px;
}

.nav-link {
    color: var(--secondary-blue);
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 5px 0;
}

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

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

/* 言語切替ボタン */
.language-switch {
    background: rgba(212, 175, 55, 0.1);
    padding: 8px 16px !important;
    border-radius: 20px;
    border: 1px solid var(--primary-gold);
    transition: var(--transition-smooth);
    color: var(--secondary-blue) !important;
}

.language-switch:hover {
    background: var(--primary-gold);
    color: var(--white) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--secondary-blue);
    transition: var(--transition-smooth);
}

/* ==========================================
   ヒーローセクション
   ========================================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url('../images/hero-background.jpg') center center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 0 20px;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    font-weight: 600;
    margin-bottom: 30px;
    line-height: 1.3;
    background: linear-gradient(135deg, var(--white) 0%, var(--secondary-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    line-height: 1.8;
    margin-bottom: 40px;
    color: rgba(255, 255, 255, 0.9);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* フェードインアニメーション */
.fade-in {
    animation: fadeIn 1s ease-out;
}

.fade-in-delay {
    animation: fadeIn 1s ease-out 0.3s backwards;
}

.fade-in-delay-2 {
    animation: fadeIn 1s ease-out 0.6s backwards;
}

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

/* スクロールインジケーター */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    animation: bounce 2s infinite;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.7);
    border-radius: 13px;
    margin: 0 auto 10px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(16px);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-10px);
    }
}

/* ==========================================
   ボタン
   ========================================== */
.btn {
    display: inline-block;
    padding: 15px 40px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-gold) 0%, var(--secondary-gold) 100%);
    color: var(--night-sky);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--primary-gold);
}

.btn-secondary:hover {
    background: var(--primary-gold);
    color: var(--night-sky);
    transform: translateY(-3px);
}

.btn-full {
    width: 100%;
}

/* ==========================================
   About Section
   ========================================== */
.about {
    background: var(--light-gray);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text h3 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    color: var(--secondary-blue);
    margin-bottom: 25px;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 1.05rem;
    line-height: 1.9;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background: var(--white);
    border-radius: 10px;
    transition: var(--transition-smooth);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.stat-item i {
    font-size: 3rem;
    color: var(--primary-gold);
    margin-bottom: 20px;
}

.stat-item h4 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: var(--secondary-blue);
    margin-bottom: 10px;
}

.stat-item p {
    font-size: 0.95rem;
    color: var(--medium-gray);
    margin: 0;
}

/* ==========================================
   Services Section
   ========================================== */
.services {
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    border: 1px solid #e0e0e0;
    border-radius: 15px;
    padding: 40px 30px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-gold), var(--secondary-gold));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.service-card.highlight {
    border: 2px solid var(--primary-gold);
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.05) 0%, rgba(244, 228, 183, 0.05) 100%);
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--primary-gold);
    color: var(--night-sky);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
}

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-gold) 0%, var(--secondary-gold) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.service-icon i {
    font-size: 2rem;
    color: var(--white);
}

.service-card h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--secondary-blue);
    margin-bottom: 15px;
}

.service-card > p {
    font-size: 1rem;
    color: var(--medium-gray);
    margin-bottom: 25px;
    line-height: 1.8;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 8px 0;
    font-size: 0.95rem;
    color: var(--dark-gray);
    display: flex;
    align-items: start;
    gap: 10px;
}

.service-features i {
    color: var(--primary-gold);
    margin-top: 5px;
    font-size: 0.8rem;
}

/* ==========================================
   Features Section
   ========================================== */
.features {
    background: var(--light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.feature-item {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 15px;
    transition: var(--transition-smooth);
    position: relative;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-number {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-gold);
    opacity: 0.3;
    position: absolute;
    top: 20px;
    right: 30px;
}

.feature-item h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--secondary-blue);
    margin-bottom: 15px;
}

.feature-item p {
    font-size: 1rem;
    color: var(--medium-gray);
    line-height: 1.8;
}

/* ==========================================
   Process Section
   ========================================== */
.process {
    background: var(--white);
}

.process-steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
    flex-wrap: wrap;
}

.process-step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: 20px;
}

.process-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-gold) 0%, var(--secondary-gold) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--transition-smooth);
}

.process-step:hover .process-icon {
    transform: scale(1.1) rotate(5deg);
}

.process-icon i {
    font-size: 2rem;
    color: var(--white);
}

.process-step h3 {
    font-size: 0.9rem;
    color: var(--primary-gold);
    margin-bottom: 10px;
    font-weight: 600;
}

.process-step h4 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    color: var(--secondary-blue);
    margin-bottom: 15px;
}

.process-step p {
    font-size: 0.95rem;
    color: var(--medium-gray);
    line-height: 1.7;
}

.process-arrow {
    color: var(--primary-gold);
    font-size: 1.5rem;
}

/* ==========================================
   Contact Section
   ========================================== */
.contact {
    background: var(--light-gray);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
}

.contact-info {
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    align-items: start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-gold) 0%, var(--secondary-gold) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.3rem;
    color: var(--white);
}

.contact-text h4 {
    font-weight: 600;
    color: var(--secondary-blue);
    margin-bottom: 8px;
}

.contact-text p {
    color: var(--medium-gray);
    line-height: 1.6;
    font-size: 0.95rem;
}

.contact-text a {
    color: var(--primary-blue);
}

.contact-text a:hover {
    color: var(--primary-gold);
}

.contact-cta {
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid #e0e0e0;
}

.contact-cta h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    color: var(--secondary-blue);
    margin-bottom: 15px;
}

.contact-cta p {
    color: var(--medium-gray);
    line-height: 1.8;
}

/* フォーム */
.contact-form-wrapper {
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--secondary-blue);
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.required {
    color: #e74c3c;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    font-family: var(--font-sans);
    transition: var(--transition-smooth);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.form-group textarea {
    resize: vertical;
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    background: var(--night-sky);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo img {
    height: 80px;
    width: auto;
    margin-bottom: 20px;
    object-fit: contain;
}

.footer-tagline {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--secondary-gold);
    margin-top: 15px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    color: var(--primary-gold);
    margin-bottom: 20px;
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

.footer-column ul li a:hover {
    color: var(--primary-gold);
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* ==========================================
   Back to Top Button
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-gold) 0%, var(--secondary-gold) 100%);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    z-index: 999;
    box-shadow: 0 5px 20px rgba(212, 175, 55, 0.4);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(212, 175, 55, 0.6);
}

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

/* タブレット */
@media (max-width: 992px) {
    :root {
        --section-padding: 70px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .process-arrow {
        display: none;
    }
    
    .process-steps {
        flex-direction: column;
        gap: 30px;
    }
}

/* モバイル */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--night-sky);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 30px;
        transition: left 0.3s ease;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero {
        min-height: 600px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    :root {
        --section-padding: 50px;
    }
    
    .hero-title {
        font-size: 1.6rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .service-card,
    .feature-item {
        padding: 30px 20px;
    }
    
    .contact-form-wrapper,
    .contact-info {
        padding: 30px 20px;
    }
}