/* ====================
   CSS Variables
   ==================== */
:root {
    /* カラーパレット - グリーン系 */
    --primary-color: #1B4332;
    --primary-light: #2D6A4F;
    --primary-dark: #081C15;
    --accent-color: #40916C;
    --accent-light: #52B788;
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-white: #FFFFFF;
    --bg-light: #F8F9FA;
    --bg-section: #F1F5F3;
    
    /* フォント */
    --font-main: 'Noto Sans JP', sans-serif;
    --font-accent: 'Montserrat', sans-serif;
    
    /* スペーシング */
    --section-padding: 80px 20px;
    --container-max-width: 1200px;
    
    /* トランジション */
    --transition: all 0.3s ease;
}

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

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

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

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

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

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

/* ====================
   ナビゲーションバー
   ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand a {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 50px;
    width: auto;
    transition: var(--transition);
}

.logo-img:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: var(--transition);
}

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

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

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* ====================
   Hero Section
   ==================== */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 50%, var(--primary-light) 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(82, 183, 136, 0.2) 0%, transparent 50%);
    z-index: 1;
}

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

.hero-title {
    font-family: var(--font-accent);
    font-size: 4rem;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 15px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 0, 0, 0.3);
    color: #FFFFFF;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 15px;
    color: #FFFFFF;
    text-shadow: 1px 1px 10px rgba(0, 0, 0, 0.5), 0 0 20px rgba(0, 0, 0, 0.3);
}

.hero-tagline {
    font-family: var(--font-accent);
    font-size: 1rem;
    letter-spacing: 2px;
    margin-bottom: 40px;
    color: #FFFFFF;
    text-shadow: 1px 1px 8px rgba(0, 0, 0, 0.5), 0 0 15px rgba(0, 0, 0, 0.3);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator span {
    display: block;
    width: 20px;
    height: 30px;
    border: 2px solid var(--bg-white);
    border-radius: 15px;
    position: relative;
}

.scroll-indicator span::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--bg-white);
    border-radius: 2px;
    animation: scrollDown 1.5s infinite;
}

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

@keyframes scrollDown {
    0%, 100% {
        top: 5px;
        opacity: 1;
    }
    50% {
        top: 15px;
        opacity: 0.5;
    }
}

/* ====================
   ボタン
   ==================== */
.btn {
    display: inline-block;
    padding: 15px 40px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--accent-color);
    color: var(--bg-white);
    box-shadow: 0 5px 15px rgba(64, 145, 108, 0.3);
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(64, 145, 108, 0.4);
}

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

section:nth-child(even) {
    background: var(--bg-section);
}

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

.section-title {
    font-family: var(--font-accent);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.section-divider {
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.about-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 30px;
}

.about-name span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
    display: block;
    margin-top: 5px;
}

.about-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.9;
}

.about-image {
    display: flex;
    justify-content: center;
}

.representative-photo {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 10px 30px rgba(27, 67, 50, 0.2);
    border: 5px solid var(--bg-white);
}

/* ====================
   Solution Section
   ==================== */
.solution {
    background: var(--bg-white);
}

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

.solution-card {
    background: linear-gradient(135deg, var(--bg-section) 0%, #E8F0ED 100%);
    padding: 50px 35px;
    border-radius: 15px;
    text-align: left;
    transition: var(--transition);
    border: 2px solid transparent;
}

.solution-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(27, 67, 50, 0.15);
    border-color: var(--accent-color);
}

.solution-icon {
    width: 90px;
    height: 90px;
    margin: 0 0 30px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: var(--bg-white);
}

.solution-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.solution-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.solution-description strong {
    color: var(--primary-light);
    display: block;
    margin-top: 10px;
    font-size: 0.9rem;
}

/* ====================
   Services Section
   ==================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--bg-white);
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(27, 67, 50, 0.15);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 35px;
    color: var(--bg-white);
}

.service-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.service-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ====================
   Contact Section
   ==================== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--bg-white);
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.contact-details a {
    color: var(--text-secondary);
    font-size: 1rem;
}

.contact-details a:hover {
    color: var(--accent-color);
}

.contact-form-wrapper {
    background: var(--bg-white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

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

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.required {
    color: #D32F2F;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #E0E0E0;
    border-radius: 5px;
    font-family: var(--font-main);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-group textarea {
    resize: vertical;
}

.contact-form button {
    width: 100%;
}

/* ====================
   Footer
   ==================== */
.footer {
    background: var(--primary-dark);
    color: var(--bg-white);
    text-align: center;
    padding: 30px 20px;
}

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

/* ====================
   レスポンシブ対応
   ==================== */

/* タブレット */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
}

/* スマートフォン */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background: var(--bg-white);
        width: 100%;
        text-align: center;
        padding: 30px 0;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        transition: 0.3s;
        gap: 0;
    }
    
    .nav-menu li {
        padding: 15px 0;
    }
    
    .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(8px, -8px);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-tagline {
        font-size: 0.85rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
    }
    
    .representative-photo {
        width: 200px;
        height: 200px;
    }
    
    .logo-img {
        height: 40px;
    }
}