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

:root {
    /* カラーパレット */
    --primary-navy: #1e3a8a;
    --primary-blue: #3b82f6;
    --accent-gold: #f59e0b;
    --dark-navy: #1e293b;
    --light-blue: #dbeafe;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-600: #4b5563;
    --gray-800: #1f2937;
    --white: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    
    /* タイポグラフィ */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Roboto', sans-serif;
    
    /* スペーシング */
    --section-padding: 100px;
    --container-max-width: 1200px;
    
    /* トランジション */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    line-height: 1.7;
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== ヘッダー ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-medium);
}

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

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: 2px;
    letter-spacing: 0.5px;
}

.logo-sub {
    font-size: 11px;
    font-family: var(--font-secondary);
    color: var(--accent-gold);
    font-weight: 500;
    letter-spacing: 1.5px;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 15px;
    position: relative;
    transition: var(--transition-fast);
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent-gold);
    transition: var(--transition-medium);
}

.nav-link:hover {
    color: var(--primary-blue);
}

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

.cta-button {
    background: linear-gradient(135deg, var(--primary-navy), var(--primary-blue));
    color: var(--white);
    border: none;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-medium);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 8px;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-navy);
    margin: 3px 0;
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* ===== ヒーローセクション ===== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #60a5fa 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(245, 158, 11, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(30, 58, 138, 0.2);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    animation: fadeInUp 1s ease;
}

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

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 24px;
    letter-spacing: 1px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 20px;
    font-weight: 400;
    line-height: 1.8;
    margin-bottom: 40px;
    opacity: 0.95;
}

.mobile-br {
    display: none;
}

.hero-cta {
    background-color: var(--accent-gold);
    color: var(--white);
    border: none;
    padding: 18px 48px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-medium);
    box-shadow: 0 10px 30px rgba(245, 158, 11, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.hero-cta:hover {
    background-color: #d97706;
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(245, 158, 11, 0.4);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--white);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 2px;
    opacity: 0.8;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background-color: var(--white);
    margin-top: 10px;
    animation: scrollAnimation 2s ease infinite;
}

@keyframes scrollAnimation {
    0%, 100% { transform: translateY(0); opacity: 0; }
    50% { transform: translateY(20px); opacity: 1; }
}

/* ===== 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-size: 42px;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-subtitle {
    font-size: 14px;
    font-family: var(--font-secondary);
    color: var(--accent-gold);
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
}

/* アニメーションクラス */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== 事業内容セクション ===== */
.services {
    background-color: var(--gray-100);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--white);
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: var(--shadow-md);
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

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

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

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

.service-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-navy));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 36px;
    color: var(--white);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.2);
}

.service-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: 16px;
}

.service-description {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.service-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.feature-tag {
    background-color: var(--light-blue);
    color: var(--primary-blue);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

/* ===== 強みセクション ===== */
.strengths {
    background-color: var(--white);
}

.strengths-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 40px;
}

.strength-item {
    text-align: center;
    padding: 30px 20px;
}

.strength-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--accent-gold), #fb923c);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 42px;
    color: var(--white);
    box-shadow: 0 10px 25px rgba(245, 158, 11, 0.25);
    transition: var(--transition-medium);
}

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

.strength-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: 12px;
}

.strength-description {
    font-size: 15px;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* ===== 会社概要セクション ===== */
.company {
    background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
    color: var(--white);
}

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

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

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

.company-table th,
.company-table td {
    padding: 24px 30px;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.company-table th {
    background-color: var(--gray-100);
    color: var(--primary-navy);
    font-weight: 700;
    width: 180px;
    font-size: 15px;
}

.company-table td {
    color: var(--text-primary);
    font-size: 15px;
}

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

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

.business-list li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
}

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

/* ===== お問い合わせセクション ===== */
.contact {
    background-color: var(--gray-100);
}

.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-text {
    font-size: 17px;
    line-height: 1.9;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.contact-button {
    background: linear-gradient(135deg, var(--primary-navy), var(--primary-blue));
    color: var(--white);
    border: none;
    padding: 20px 60px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-medium);
    box-shadow: var(--shadow-lg);
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

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

.contact-info {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    color: var(--text-primary);
}

.contact-info-item i {
    color: var(--accent-gold);
    font-size: 20px;
}

/* ===== フッター ===== */
.footer {
    background-color: var(--dark-navy);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.footer-logo p {
    font-size: 12px;
    font-family: var(--font-secondary);
    color: var(--accent-gold);
    letter-spacing: 2px;
}

.footer-info {
    text-align: right;
}

.footer-info p {
    font-size: 14px;
    margin-bottom: 8px;
    opacity: 0.8;
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    opacity: 0.7;
}

/* ===== モーダル ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

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

.modal-content {
    position: relative;
    background-color: var(--white);
    border-radius: 20px;
    padding: 50px 40px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideIn 0.4s ease;
    z-index: 2001;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition-fast);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    background-color: var(--gray-100);
    color: var(--primary-navy);
}

.modal-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-navy);
    margin-bottom: 12px;
    text-align: center;
}

.modal-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    text-align: center;
}

/* ===== フォームスタイル ===== */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.form-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.required {
    color: #ef4444;
    margin-left: 4px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--gray-300);
    border-radius: 8px;
    font-size: 15px;
    font-family: var(--font-primary);
    transition: var(--transition-fast);
    background-color: var(--white);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input.error,
.form-textarea.error {
    border-color: #ef4444;
}

.form-error {
    color: #ef4444;
    font-size: 13px;
    margin-top: 6px;
    display: none;
}

.form-error.show {
    display: block;
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 10px;
}

.btn-cancel,
.btn-submit {
    flex: 1;
    padding: 14px 30px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-medium);
    border: none;
}

.btn-cancel {
    background-color: var(--gray-200);
    color: var(--text-primary);
}

.btn-cancel:hover {
    background-color: var(--gray-300);
}

.btn-submit {
    background: linear-gradient(135deg, var(--primary-navy), var(--primary-blue));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===== レスポンシブデザイン ===== */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .section-title {
        font-size: 36px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }
    
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        box-shadow: var(--shadow-lg);
        padding: 20px;
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition-medium);
        pointer-events: none;
    }
    
    .nav.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-link {
        display: block;
        padding: 15px 0;
        border-bottom: 1px solid var(--gray-200);
    }
    
    .cta-button {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero {
        min-height: 600px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .mobile-br {
        display: block;
    }
    
    .hero-cta {
        padding: 16px 36px;
        font-size: 16px;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .strengths-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 30px;
    }
    
    .company-table th {
        width: 120px;
        padding: 18px 20px;
        font-size: 14px;
    }
    
    .company-table td {
        padding: 18px 20px;
        font-size: 14px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-info {
        text-align: left;
    }
    
    .modal-content {
        padding: 40px 30px;
    }
    
    .form-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 20px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 15px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .service-card {
        padding: 30px 20px;
    }
    
    .company-table th,
    .company-table td {
        padding: 15px;
        font-size: 13px;
    }
    
    .company-table th {
        width: 100px;
    }
    
    .modal-content {
        padding: 30px 20px;
        width: 95%;
    }
    
    .modal-title {
        font-size: 24px;
    }
    
    .contact-button,
    .hero-cta {
        width: 100%;
        justify-content: center;
    }
}

/* スクロールバーのカスタマイズ */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-blue);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-navy);
}