:root {
    --color-primary: #c41e3a;
    --color-secondary: #1e3a5f;
    --color-accent: #ffd700;
    --color-surface: #ffffff;
    --color-background: #f5f7fa;
    --color-border: #d9dde5;
    --color-text: #1f2933;
    --color-muted: #52606d;
    --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 6px 16px rgba(15, 23, 42, 0.15);
    --max-width: 1200px;
    --transition: all 0.25s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: "Hiragino Sans", "Yu Gothic", "Noto Sans JP", "Segoe UI", sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover,
a:focus {
    text-decoration: underline;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.site-header {
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 10;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    gap: 16px;
}

.branding {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.site-logo {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-primary);
}

.site-tagline {
    font-size: 0.9rem;
    color: var(--color-muted);
}

.language-nav ul,
.primary-nav ul,
.site-footer ul {
    display: flex;
    list-style: none;
    gap: 12px;
}

.language-nav a,
.primary-nav a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-size: 0.95rem;
    transition: var(--transition);
}

.language-nav a:hover,
.primary-nav a:hover,
.language-nav a:focus,
.primary-nav a:focus {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-sm);
}

.language-nav a.active,
.primary-nav a.active {
    background: var(--color-primary);
    color: #fff;
}

.primary-nav {
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    position: relative;
}

/* Hamburger Menu Styles */
.menu-toggle {
    display: none;
}

.mobile-menu-bar {
    display: none;
}

.hamburger-icon {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    margin-right: 12px;
}

.hamburger-icon span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-text {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text);
}

.primary-nav .container {
    padding: 10px 24px;
}

.primary-nav .nav-menu {
    display: flex;
    list-style: none;
    gap: 12px;
    flex-wrap: wrap;
}

.main-content {
    flex: 1;
    padding: 48px 0 64px;
}

.breadcrumbs {
    margin-bottom: 24px;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.breadcrumbs ol {
    display: flex;
    gap: 8px;
    list-style: none;
    flex-wrap: wrap;
}

.breadcrumbs li::after {
    content: "/";
    margin-left: 8px;
    color: var(--color-border);
}

.breadcrumbs li:last-child::after {
    content: "";
}

.site-footer {
    background: #0f172a;
    color: rgba(255, 255, 255, 0.86);
    padding: 32px 0;
}

.footer-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.site-footer a {
    color: rgba(255, 255, 255, 0.86);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 999px;
    font-weight: 600;
    border: 1px solid transparent;
    transition: var(--transition);
}

.btn.primary {
    background: linear-gradient(135deg, #ff6b6b, var(--color-primary));
    color: #fff;
}

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

.btn:hover,
.btn:focus {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.language-selection {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 80px 0;
}

.language-card {
    background: var(--color-surface);
    padding: 48px;
    border-radius: 24px;
    box-shadow: var(--shadow-md);
    max-width: 520px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.language-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

.language-option {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 24px 16px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.08), rgba(196, 30, 58, 0.08));
    border: 1px solid transparent;
    font-weight: 600;
    transition: var(--transition);
}

.language-option:hover,
.language-option:focus {
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: var(--shadow-md);
}

.option-label {
    font-size: 1.2rem;
}

.option-sub {
    font-size: 0.85rem;
    color: var(--color-muted);
}

.language-note {
    font-size: 0.9rem;
    color: var(--color-muted);
}

.home-page {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

.hero-block {
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.08), rgba(196, 30, 58, 0.08));
    padding: 48px;
    border-radius: 24px;
    box-shadow: var(--shadow-sm);
}

.hero-block h1 {
    font-size: 2rem;
    margin-bottom: 16px;
}

.hero-block p {
    max-width: 640px;
    font-size: 1.05rem;
    color: var(--color-muted);
}

.hero-actions {
    margin-top: 32px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.category-overview {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.category-card {
    background: var(--color-surface);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 16px;
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.category-card h3 {
    font-size: 1.3rem;
    color: var(--color-secondary);
}

.category-card p {
    color: var(--color-muted);
    flex: 1;
}

.category-link {
    font-weight: 600;
    color: var(--color-primary);
}

.category-link:hover,
.category-link:focus {
    text-decoration: underline;
}

@media (max-width: 820px) {
    .header-container {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero-block {
        padding: 32px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .category-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

@media (max-width: 560px) {
    .container {
        padding: 0 16px;
    }

    .language-card {
        padding: 32px;
    }

    /* Hamburger Menu for Mobile */
    .mobile-menu-bar {
        display: flex;
        align-items: center;
        padding: 14px 20px;
        cursor: pointer;
        background: rgba(255, 255, 255, 0.95);
        border-bottom: 1px solid var(--color-border);
        transition: background 0.2s ease;
    }

    .mobile-menu-bar:hover {
        background: rgba(245, 247, 250, 0.95);
    }

    .primary-nav .container {
        padding: 0;
    }

    .primary-nav .nav-menu {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-top: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .menu-toggle:checked ~ .container .nav-menu {
        max-height: 500px;
    }

    .menu-toggle:checked ~ .mobile-menu-bar .hamburger-icon span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .menu-toggle:checked ~ .mobile-menu-bar .hamburger-icon span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle:checked ~ .mobile-menu-bar .hamburger-icon span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }

    .primary-nav .nav-menu li {
        width: 100%;
        border-bottom: 1px solid var(--color-border);
    }

    .primary-nav .nav-menu li:last-child {
        border-bottom: none;
    }

    .primary-nav .nav-menu a {
        display: block;
        width: 100%;
        padding: 16px 24px;
        border-radius: 0;
        text-align: left;
    }

    .hero-block h1 {
        font-size: 1.6rem;
    }
}

.page-header {
    margin-bottom: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.page-header h1 {
    font-size: 2.1rem;
}

.page-header p {
    color: var(--color-muted);
}

.region-block {
    margin-bottom: 48px;
}

.region-title {
    font-size: 1.8rem;
    margin-bottom: 24px;
}

.region-title span {
    display: inline-block;
    padding-bottom: 6px;
    border-bottom: 3px solid var(--color-secondary);
}

.subregion-block {
    margin-bottom: 20px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.subregion-block[open] {
    box-shadow: var(--shadow-md);
}

.subregion-summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 18px 24px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-secondary);
    cursor: pointer;
    background: linear-gradient(135deg, rgba(196, 30, 58, 0.08), rgba(30, 58, 95, 0.08));
    margin-bottom: 1em;
}

.subregion-summary::-webkit-details-marker {
    display: none;
}

.subregion-summary::after {
    content: "";
    width: 10px;
    height: 10px;
    border-right: 2px solid var(--color-secondary);
    border-bottom: 2px solid var(--color-secondary);
    transform: rotate(45deg);
    transition: var(--transition);
}

.subregion-block[open] .subregion-summary::after {
    transform: rotate(-135deg);
}

.subregion-name {
    flex: 1;
}

.subregion-count {
    font-size: 0.85rem;
    color: var(--color-muted);
    background: rgba(30, 58, 95, 0.12);
    padding: 4px 10px;
    border-radius: 999px;
}

.subregion-block > .country-grid {
    padding: 0 24px 24px;
}

.country-grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.country-card,
.info-card {
    background: var(--color-surface);
    border-radius: 18px;
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(15, 23, 42, 0.06);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.country-card .country-name {
    font-size: 1.2rem;
    color: var(--color-secondary);
}

.country-card .country-name a {
    text-decoration: underline;
}

.country-card .country-description {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.country-link {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 0.95rem;
    text-decoration: underline;
}

.country-link:hover,
.country-link:focus {
    text-decoration: underline;
}

.item-list {
    list-style: disc;
    padding-left: 20px;
    color: var(--color-muted);
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.item-title {
    font-weight: 600;
    color: var(--color-secondary);
}

.item-description {
    margin-top: 4px;
    font-size: 0.85rem;
}

.detail-section {
    margin-bottom: 40px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.detail-section h2 {
    font-size: 1.5rem;
    border-left: 4px solid var(--color-primary);
    padding-left: 12px;
}

.detail-section ul{
    padding-left: 2em;
}

.detail-list {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.detail-list div {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.detail-list dt {
    font-weight: 600;
    color: var(--color-secondary);
    font-size: 0.9rem;
}
.full-detail dt {
    font-weight: 600;
    color: var(--color-secondary);
    font-size: 0.9rem;
}



.detail-list dd {
    margin: 0;
    color: var(--color-muted);
}

.card-list {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.info-card h3 {
    font-size: 1.2rem;
    color: var(--color-secondary);
}

.info-card p {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.meta-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.lead {
    font-size: 1.05rem;
    color: var(--color-muted);
    /* max-width: 720px; */
}

.region-meta {
    font-size: 0.9rem;
    color: var(--color-muted);
}

.back-link {
    margin-top: 32px;
}

.back-link a {
    color: var(--color-primary);
    font-weight: 600;
}

.country-tabs {
    margin-bottom: 32px;
    background: var(--color-surface);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.country-tabs ul {
    display: flex;
    list-style: none;
    gap: 4px;
    padding: 8px;
    min-width: min-content;
}

.country-tabs li {
    flex-shrink: 0;
}

.tab-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
    background: transparent;
    border: 1px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
    text-decoration: none;
}

.tab-link:hover,
.tab-link:focus {
    background: rgba(196, 30, 58, 0.08);
    border-color: rgba(196, 30, 58, 0.2);
    text-decoration: none;
}

.tab-link.active {
    background: linear-gradient(135deg, #ff6b6b, var(--color-primary));
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.tab-link.active:hover,
.tab-link.active:focus {
    background: linear-gradient(135deg, #ff6b6b, var(--color-primary));
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

@media (max-width: 820px) {
    .country-tabs ul {
        gap: 6px;
        padding: 6px;
    }

    .tab-link {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
}

@media (max-width: 560px) {
    .country-tabs {
        border-radius: 12px;
    }

    .country-tabs ul {
        flex-direction: column;
        gap: 4px;
    }

    .tab-link {
        width: 100%;
        text-align: center;
        padding: 12px 16px;
    }
}

/* Static Pages (About, Privacy, Terms) */
.static-page {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.static-page h1 {
    font-size: 2.1rem;
    color: var(--color-text);
    margin-bottom: 12px;
}

.static-page > p {
    font-size: 1.05rem;
    color: var(--color-muted);
    margin-bottom: 16px;
}

.static-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.content-section {
    background: var(--color-surface);
    border-radius: 18px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(15, 23, 42, 0.06);
}

.content-section h2 {
    font-size: 1.5rem;
    color: var(--color-secondary);
    margin-bottom: 16px;
}

.content-section p {
    color: var(--color-muted);
    line-height: 1.8;
    font-size: 1rem;
}

@media (max-width: 560px) {
    .static-page h1 {
        font-size: 1.7rem;
    }

    .static-page > p {
        font-size: 0.95rem;
    }

    .content-section {
        padding: 24px;
    }

    .content-section h2 {
        font-size: 1.3rem;
    }

    .content-section p {
        font-size: 0.95rem;
    }
}

/* Country Symbol Images (Flag and Emblem) */
.country-symbol-container {
    display: flex;
    justify-content: center;
    padding: 16px 0;
}

.country-flag,
.country-emblem {
    max-width: 100%;
    height: auto;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: var(--transition);
}

.country-flag {
    max-width: 600px;
}

.country-emblem {
    max-width: 400px;
}

.country-flag:hover,
.country-emblem:hover {
    box-shadow: var(--shadow-md);
    transform: scale(1.02);
}

@media (max-width: 820px) {
    .country-flag {
        max-width: 500px;
    }

    .country-emblem {
        max-width: 350px;
    }
}

@media (max-width: 560px) {
    .country-flag {
        max-width: 100%;
    }

    .country-emblem {
        max-width: 100%;
    }
}