:root {
    --color-primary: #1a4d2e;
    /* Deep Forest Green */
    --color-secondary: #005b96;
    /* Clean Water Blue */
    --color-accent: #c49a6c;
    /* Earth/Wood */
    --color-text: #333333;
    --color-text-light: #666666;
    --color-white: #ffffff;
    --color-light-bg: #f9fbf9;
    --color-dark-bg: #1c1c1c;

    --font-base: 'Noto Sans JP', sans-serif;
    --font-heading: 'Noto Serif JP', serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    --transition: all 0.3s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    color: var(--color-text);
    line-height: 1.8;
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.4;
}

/* Utilities */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-xl) 0;
}

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

/* Button Styles */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 2px;
    font-weight: 500;
    letter-spacing: 0.05em;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: 1px solid var(--color-primary);
}

.btn-primary:hover {
    background-color: #143a22;
    border-color: #143a22;
}

.btn-secondary {
    background-color: var(--color-accent);
    color: var(--color-white);
    border: 1px solid var(--color-accent);
}

.btn-secondary:hover {
    background-color: #b0885e;
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

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

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 15px 0;
    transition: var(--transition);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    color: var(--color-primary);
    font-weight: 700;
    letter-spacing: 0.05em;
}

.main-nav ul {
    display: flex;
    gap: 30px;
    align-items: center;
}

.main-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
}

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

.btn-nav {
    padding: 8px 20px;
    background-color: var(--color-primary);
    color: white !important;
    border-radius: 4px;
}

.btn-nav:hover {
    background-color: #143a22;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    width: 30px;
    height: 24px;
    flex-direction: column;
    justify-content: space-between;
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition);
}

/* Hero Section */
.hero-section {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--color-white);
    text-align: center;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    padding: 0 20px;
}

.hero-subtitle {
    font-size: 1.2rem;
    letter-spacing: 0.2em;
    margin-bottom: 20px;
    font-weight: 500;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 30px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 40px;
    line-height: 2;
}

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-subtitle {
    display: block;
    color: var(--color-primary);
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    margin-bottom: 10px;
    text-transform: uppercase;
    font-weight: 700;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--color-text);
}

.section-desc {
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.about-section {
    background-color: var(--color-light-bg);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.2rem;
    line-height: 2.2;
}

/* Issues Section */
.issues-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.issue-item {
    margin-bottom: 40px;
}

.issue-item:last-child {
    margin-bottom: 0;
}

.issue-item h4 {
    font-size: 1.3rem;
    color: var(--color-primary);
    margin-bottom: 15px;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
    display: inline-block;
}

.issue-item p {
    color: var(--color-text-light);
}

.issue-image {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    overflow: hidden;
}

/* Vision Section */
.vision-section {
    position: relative;
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.vision-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.vision-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 77, 46, 0.85);
    /* Green overlay */
}

.vision-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.vision-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.vision-title {
    font-size: 2.5rem;
    margin-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    padding-bottom: 20px;
    display: inline-block;
}

.vision-content p {
    font-size: 1.2rem;
    line-height: 2.2;
}

/* Action Section */
.action-section {
    padding: 80px 0;
    background-color: var(--color-white);
}

.action-box {
    background-color: var(--color-light-bg);
    border: 1px solid #eee;
    padding: 60px;
    text-align: center;
    border-radius: 4px;
    max-width: 900px;
    margin: 0 auto;
}

.action-box h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.action-box p {
    margin-bottom: 30px;
    color: var(--color-text-light);
}

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

/* Footer */
.site-footer {
    background-color: var(--color-dark-bg);
    color: #999;
    padding: 60px 0 20px;
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid #333;
}

.footer-logo {
    color: var(--color-white);
    font-size: 1.2rem;
    font-family: var(--font-heading);
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a:hover {
    color: var(--color-white);
}

.copyright {
    text-align: center;
    font-size: 0.8rem;
}

/* Animations */
.fade-in,
.fade-in-up,
.fade-in-left,
.fade-in-right {
    opacity: 0;
    transition: all 0.8s ease-out;
}

.fade-in-up {
    transform: translateY(30px);
}

.fade-in-left {
    transform: translateX(-30px);
}

.fade-in-right {
    transform: translateX(30px);
}

.visible {
    opacity: 1;
    transform: translateY(0) translateX(0);
}

/* Detailed Issues Section */
.detailed-issues-section {
    background-color: #f6f9f6;
}

.accordion-container {
    max-width: 900px;
    margin: 0 auto;
}

.chapter-accordion {
    background: var(--color-white);
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    margin-bottom: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.chapter-accordion[open] {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    border-color: var(--color-primary);
}

.chapter-summary {
    padding: 20px 30px;
    cursor: pointer;
    background-color: var(--color-white);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--color-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    list-style: none;
    /* Remove default marker */
}

/* Remove default marker for Webkit */
.chapter-summary::-webkit-details-marker {
    display: none;
}

.accordion-icon {
    width: 24px;
    height: 24px;
    position: relative;
    flex-shrink: 0;
    margin-left: 15px;
}

.accordion-icon::before,
.accordion-icon::after {
    content: '';
    position: absolute;
    background-color: var(--color-primary);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.accordion-icon::before {
    width: 16px;
    height: 2px;
}

.accordion-icon::after {
    width: 2px;
    height: 16px;
    transition: transform 0.3s ease;
}

.chapter-accordion[open] .accordion-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
    /* Turn plus into minus appearance */
}

.chapter-content {
    padding: 0 30px 30px;
    border-top: 1px solid #f0f0f0;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.issue-card {
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px dashed #ddd;
}

.issue-card:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.issue-header {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
}

.issue-number {
    font-weight: 700;
    color: var(--color-accent);
    margin-right: 15px;
    font-size: 1.2rem;
    white-space: nowrap;
}

.issue-card h4 {
    font-size: 1.2rem;
    color: var(--color-text);
    margin: 0;
    line-height: 1.5;
}

.issue-reason {
    margin-bottom: 15px;
    font-size: 0.95rem;
    color: var(--color-text);
    background-color: #fffbf0;
    /* Soft warm background */
    padding: 15px;
    border-radius: 4px;
    border-left: 3px solid var(--color-accent);
}

.opinion-box {
    background-color: #f0f7f4;
    /* Soft green tint */
    border: 1px solid #d8eadd;
    padding: 20px;
    border-radius: 6px;
    position: relative;
}

.opinion-text {
    font-size: 0.95rem;
    color: #143a22;
    margin-bottom: 15px;
    line-height: 1.7;
    text-align: justify;
}

.btn-copy {
    font-size: 0.85rem;
    padding: 8px 16px;
    background-color: #fff;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.btn-copy:hover {
    background-color: var(--color-primary);
    color: #fff;
}

.btn-copy.copied {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.conclusion-box {
    background-color: var(--color-white);
    border: 3px double var(--color-primary);
    padding: 40px;
    text-align: center;
    margin-top: 40px;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(26, 77, 46, 0.05);
}

.conclusion-box h4 {
    color: var(--color-primary);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.conclusion-content .opinion-text {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 25px;
    color: var(--color-text);
    text-align: center;
}

.disclaimer-text {
    font-size: 0.8rem;
    color: #888;
    text-align: center;
    margin-top: 40px;
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .chapter-summary {
        padding: 15px;
        font-size: 1rem;
    }

    .chapter-content {
        padding: 0 15px 20px;
    }

    .issue-header {
        flex-direction: column;
    }

    .issue-number {
        margin-bottom: 5px;
        font-size: 1rem;
    }

    .issue-card h4 {
        font-size: 1.1rem;
    }

    .conclusion-box {
        padding: 30px 20px;
    }

    .accordion-icon {
        margin-left: 10px;
    }

    :root {
        --spacing-xl: 4rem;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .main-nav {
        display: none;
        /* In production, would be a mobile menu */
    }

    .mobile-menu-toggle {
        display: flex;
        /* Simplified mobile menu for this task */
    }

    .issues-grid {
        grid-template-columns: 1fr;
    }

    .vision-title {
        font-size: 1.8rem;
    }

    .action-box {
        padding: 40px 20px;
    }

    .action-buttons {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
    }

    /* Basic Mobile Menu Implementation via JS would toggle a class */
    .main-nav.active {
        display: block;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background-color: white;
        padding: 20px;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    }

    .main-nav.active ul {
        flex-direction: column;
        align-items: flex-start;
    }
}