/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a5f4a;
    --secondary-color: #2d8659;
    --accent-color: #f5f5f0;
    --text-dark: #1a1a1a;
    --text-light: #666666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Navigation ===== */
.navbar {
    background-color: #ffffff;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 700;
    font-size: 18px;
    gap: 10px;
}

.logo-img {
    height: 40px;
    width: auto;
}

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

.nav-item {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-link-cta {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.nav-link-cta:hover {
    background-color: var(--secondary-color);
    color: white;
}

/* ===== Hero Section ===== */
.hero {
    padding: 80px 20px;
    background: linear-gradient(135deg, rgba(26, 95, 74, 0.05) 0%, rgba(45, 134, 89, 0.05) 100%);
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 48px;
    line-height: 1.3;
    color: var(--text-dark);
    margin: 20px 0;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.hero-description {
    font-size: 16px;
    color: var(--text-light);
    margin: 20px 0;
    line-height: 1.8;
}

.hero-cta {
    margin-top: 30px;
}

.hero-image {
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

/* ===== Section Styles ===== */
section {
    padding: 80px 20px;
}

section h2 {
    font-size: 36px;
    color: var(--text-dark);
    margin-bottom: 10px;
    font-weight: 700;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 50px;
}

/* ===== Concept Section ===== */
.concept {
    background-color: var(--accent-color);
}

.concept-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.concept-card {
    background-color: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.concept-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.concept-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.concept-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.concept-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ===== Process Section ===== */
.process {
    background-color: white;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.process-step {
    background-color: var(--accent-color);
    padding: 40px;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    transition: transform 0.3s ease;
}

.process-step:hover {
    transform: translateX(5px);
}

.step-number {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.process-step h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.process-step p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ===== Cases Section ===== */
.cases {
    background-color: var(--accent-color);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.case-card {
    background-color: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.case-card h3 {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 15px;
}

.case-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 25px;
}

.case-before-after {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.case-before,
.case-after {
    padding: 20px;
    border-radius: 6px;
    background-color: var(--accent-color);
}

.case-before {
    border-left: 3px solid #ff6b6b;
}

.case-after {
    border-left: 3px solid #51cf66;
}

.case-before strong,
.case-after strong {
    display: block;
    margin-bottom: 10px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.case-before strong {
    color: #ff6b6b;
}

.case-after strong {
    color: #51cf66;
}

.case-before p,
.case-after p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== CTA Section ===== */
.cta-section {
    background-color: white;
}

.outcomes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.outcome-card {
    background: linear-gradient(135deg, rgba(26, 95, 74, 0.05) 0%, rgba(45, 134, 89, 0.05) 100%);
    padding: 40px;
    border-radius: 8px;
    border-top: 3px solid var(--primary-color);
}

.outcome-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.outcome-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: 60px 20px 20px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.footer-section ul {
    list-style: none;
}

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

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .nav-menu {
        gap: 15px;
        font-size: 12px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .hero-description {
        font-size: 14px;
    }

    section {
        padding: 50px 20px;
    }

    section h2 {
        font-size: 28px;
    }

    .concept-grid,
    .process-steps,
    .cases-grid,
    .outcomes-grid {
        grid-template-columns: 1fr;
    }

    .case-before-after {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav-container {
        height: auto;
        padding: 15px 20px;
        flex-direction: column;
        gap: 15px;
    }

    .nav-menu {
        flex-direction: column;
        gap: 10px;
        width: 100%;
    }

    .nav-link,
    .nav-link-cta {
        display: block;
        padding: 10px 0;
    }

    .hero-text h1 {
        font-size: 24px;
    }

    .hero-subtitle {
        font-size: 12px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 13px;
    }

    section h2 {
        font-size: 22px;
    }

    .section-subtitle {
        font-size: 14px;
    }

    .concept-card,
    .process-step,
    .case-card,
    .outcome-card {
        padding: 25px;
    }
}