:root {
    --primary-color: #FF7A00;
    --primary-hover: #E66D00;
    --secondary-color: #2c3e50;
    --text-color: #333;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --footer-bg: #1a1a1a;
    --footer-text: #ecf0f1;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --radius-md: 8px;
    --radius-lg: 16px;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    margin-bottom: 1rem;
    font-weight: 700;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

/* Layout */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Navbar */
.navbar {
    background-color: var(--card-bg);
    box-shadow: var(--shadow-sm);
    padding: 1.2rem 1.5rem;
    display: flex;
    justify-content: flex-start; /* Change from space-between for better control */
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    flex-wrap: nowrap;
    overflow-x: hidden;
    gap: 15px; /* Add gap for spacing between items */
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    font-family: var(--font-heading);
}

.brand-icon {
    font-size: 1.8rem;
}

.nav-links {
    display: none;
}

@media (min-width: 768px) {
    .nav-links {
        display: flex;
        gap: 15px; /* Smaller gap on tablets */
        margin-left: 20px;
    }
}

@media (min-width: 1200px) {
    .nav-links {
        gap: 30px; /* Larger gap on full desktop */
        margin-left: 50px;
    }
}

.nav-item {
    font-weight: 600;
    font-family: var(--font-heading);
    color: var(--secondary-color);
}

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

/* Hero Slider */
.hero-slider {
    margin-bottom: 40px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-md);
}

.slider-container {
    overflow: hidden;
}

.slider-track {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.slide {
    min-width: 100%;
    position: relative;
    aspect-ratio: 16/9;
}

.slide-background {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 40px;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
}

.hero-tag {
    display: inline-block;
    padding: 5px 10px;
    border-radius: 4px;
    background-color: var(--primary-color);
    font-size: 0.8rem;
    margin-bottom: 10px;
    font-weight: bold;
}

.slide-content h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-buttons {
    margin-top: 20px;
    display: flex;
    gap: 10px;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

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

.btn-secondary {
    background-color: rgba(255,255,255,0.2);
    color: white;
    border: 1px solid white;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    backdrop-filter: blur(5px);
}

/* Sections */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-left: 5px solid var(--primary-color);
    padding-left: 15px;
}

.content-section {
    margin-bottom: 60px;
}

/* Categories */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 15px;
}

.category-card {
    background: var(--card-bg);
    border: none;
    padding: 20px 10px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--secondary-color);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    color: var(--primary-color);
}

.category-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Article List */
.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

@media (max-width: 600px) {
    .article-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    .article-content {
        padding: 12px;
    }
    .article-content h3 {
        font-size: 0.95rem;
    }
    .article-excerpt {
        display: none; /* Hide excerpt on mobile 2-col to save space */
    }
}

.article-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.article-image {
    position: relative;
    aspect-ratio: 16/9;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-cat {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0,0,0,0.6);
    color: white;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.article-content {
    padding: 20px;
}

.article-content h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    line-height: 1.4;
    color: var(--secondary-color);
}

.article-excerpt {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: #999;
}

/* Rankings */
.ranking-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.ranking-item {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--card-bg);
    padding: 15px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.rank-num {
    font-size: 1.5rem;
    font-weight: 800;
    color: #ccc;
    width: 40px;
    text-align: center;
}

.rank-1 { color: #f1c40f; }
.rank-2 { color: #95a5a6; }
.rank-3 { color: #d35400; }

.rank-info h4 {
    margin-bottom: 5px;
    color: var(--secondary-color);
}

.rank-views {
    font-size: 0.8rem;
    color: #999;
}

/* Footer */
.site-footer {
    background-color: var(--footer-bg);
    color: var(--footer-text);
    padding: 40px 20px;
    text-align: center;
    margin-top: auto;
}

/* Page Layout (Article + Sidebar) */
.page-layout {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

@media (min-width: 768px) {
    .page-layout {
        flex-direction: row;
        align-items: flex-start;
    }

    .article-detail {
        flex: 1;
        min-width: 0;
    }

    .sidebar {
        width: 300px;
        flex-shrink: 0;
        position: sticky;
        top: 100px;
    }
}

/* Article Detail */
.article-detail {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

@media (max-width: 768px) {
    .article-detail {
        padding: 20px;
        border-radius: 0;
        margin: -20px -20px 20px -20px;
    }
}

.article-header {
    margin-bottom: 30px;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

.tag {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    background: #f1f1f1;
    color: #666;
}

.tag-purple { background: #6b46c1; color: white; }
.tag-blue { background: #3182ce; color: white; }
.tag-orange { background: var(--primary-color); color: white; }

.article-header h1 {
    font-size: 1.8rem;
    line-height: 1.3;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

@media (min-width: 768px) {
    .article-header h1 {
        font-size: 2.2rem;
    }
}

.article-meta-info {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 25px;
    font-size: 0.9rem;
    color: #666;
}

.article-meta-info .author {
    display: flex;
    align-items: center;
    gap: 10px;
}

.article-meta-info .author img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
}

.article-hero-img {
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 30px;
}

.article-hero-img img {
    width: 100%;
    display: block;
}

.article-body {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #444;
}

.article-body h2 {
    font-size: 1.5rem;
    margin: 40px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--bg-color);
    color: var(--secondary-color);
    position: relative;
}

.article-body h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--primary-color);
}

.article-body h3 {
    font-size: 1.25rem;
    margin: 30px 0 15px;
    color: var(--secondary-color);
}

.article-body p {
    margin-bottom: 20px;
}

.article-body ul, .article-body ol {
    margin-bottom: 20px;
    padding-left: 20px;
}

.article-body li {
    margin-bottom: 10px;
}

.article-body strong {
    color: var(--secondary-color);
}

.article-body hr {
    margin: 40px 0;
    border: none;
    border-top: 1px solid #eee;
}

.info-box {
    background: var(--bg-color);
    padding: 20px;
    border-radius: var(--radius-md);
    margin: 30px 0;
    display: flex;
    gap: 15px;
}

.info-box i {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-top: 3px;
}

.action-box {
    margin-top: 50px;
    padding: 30px;
    background: #f8f9fa;
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-lg);
    text-align: center;
}

.action-box h3 {
    margin-bottom: 15px;
}

.action-box p {
    margin-bottom: 25px;
    color: #666;
}

/* Sidebar Widgets */
.widget {
    background: var(--card-bg);
    padding: 25px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
}

.widget h3 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--secondary-color);
}

.widget-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.widget-item {
    display: flex;
    gap: 15px;
    align-items: center;
    padding-bottom: 15px;
    border-bottom: 1px solid #f5f5f5;
}

.widget-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.widget-item .num {
    width: 24px;
    height: 24px;
    background: var(--bg-color);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
    color: var(--secondary-color);
    flex-shrink: 0;
}

.widget-item .text {
    font-size: 0.95rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--secondary-color);
}

.widget-item:hover .text {
    color: var(--primary-color);
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-pill {
    padding: 6px 15px;
    background: var(--bg-color);
    border-radius: 20px;
    font-size: 0.8rem;
    color: #666;
    font-weight: 500;
}

.tag-pill:hover, .tag-pill.active {
    background: var(--primary-color);
    color: white;
}

/* Footer Link Color */

/* Responsive */
@media (max-width: 768px) {
    .slide-content {
        padding: 20px;
    }
    .slide-content h1 {
        font-size: 1.8rem;
        line-height: 1.2;
    }
    .slide-content p {
        font-size: 0.9rem;
        margin-bottom: 0;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .hero-buttons {
        margin-top: 15px;
    }
    .btn-primary, .btn-secondary {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
}

/* Manual Specific Styles */
.manual-container {
    max-width: 800px;
    margin: 40px auto;
    background: #fff;
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.manual-header {
    text-align: center;
    margin-bottom: 40px;
    border-bottom: 2px solid var(--bg-color);
    padding-bottom: 20px;
}

.manual-section {
    margin-bottom: 40px;
}

.manual-section h2 {
    color: var(--primary-color);
    border-left: 4px solid var(--primary-color);
    padding-left: 10px;
    margin-bottom: 20px;
}

.step-list {
    list-style: none;
    counter-reset: step;
}

.step-item {
    position: relative;
    padding-left: 40px;
    margin-bottom: 20px;
}

.step-item::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 0;
    top: 0;
    width: 25px;
    height: 25px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    text-align: center;
    line-height: 25px;
    font-weight: bold;
    font-size: 14px;
}

.screenshot {
    width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    margin: 10px 0;
    border: 1px solid #eee;
}

.download-btn {
    display: block;
    width: 100%;
    max-width: 300px;
    margin: 40px auto;
    padding: 15px;
    background: var(--primary-color);
    color: white;
    text-align: center;
    border-radius: 30px;
    font-weight: bold;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(255, 122, 0, 0.4);
    transition: transform 0.2s;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 122, 0, 0.5);
}

.app-store-badge {
    display: inline-flex;
    align-items: center;
    background: #000;
    color: #fff;
    padding: 8px 20px;
    border-radius: 10px;
    text-decoration: none;
    gap: 12px;
    transition: transform 0.2s, background 0.2s;
    margin: 10px;
    border: 1px solid #333;
}

.app-store-badge:hover {
    background: #1a1a1a;
    transform: translateY(-2px);
}

.app-store-badge i {
    font-size: 2rem;
}

.app-store-badge span {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.1;
    font-size: 0.75rem;
}

.app-store-badge span strong {
    font-size: 1.2rem;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* =========================================
   Added Styles for Layout Fix
   ========================================= */

/* Mobile Navigation & Overlay */
.overlay-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--card-bg);
    z-index: 2000;
    transform: translateX(-100%); /* Hidden by default */
    transition: transform 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
}

.overlay-menu.active {
    transform: translateX(0);
}

.menu-header {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #eee;
}

.close-menu {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--secondary-color);
    cursor: pointer;
}

.menu-nav {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.menu-item {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--secondary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 15px;
}

.menu-item i {
    width: 30px;
    color: var(--primary-color);
    text-align: center;
}

/* Menu Toggle Button */
.menu-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    display: block; /* Visible on mobile */
}

@media (min-width: 768px) {
    .menu-toggle {
        display: none; /* Hidden on desktop if we have nav-links */
    }
    .overlay-menu {
        display: none; /* Hide completely on desktop to avoid interaction issues */
    }
}

/* Slider Controls */
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    z-index: 10;
    transition: background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slider-btn:hover {
    background: rgba(0,0,0,0.8);
}

.prev-btn { left: 20px; }
.next-btn { right: 20px; }

.slider-indicators {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.indicator {
    display: block;
    width: 10px;
    height: 10px;
    background: rgba(255,255,255,0.5);
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s;
}

.indicator.active {
    background: white;
    transform: scale(1.2);
}

/* Bottom Nav */
.bottom-nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    background: var(--card-bg);
    padding: 10px 0;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    z-index: 1000;
}

@media (min-width: 768px) {
    .bottom-nav {
         display: none;
    }
}

.bottom-nav .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 0.7rem;
    color: #999;
    gap: 4px;
    text-decoration: none;
}

.bottom-nav .nav-item.active {
    color: var(--primary-color);
}

.bottom-nav .nav-item i {
    font-size: 1.2rem;
}

.nav-item-center {
    position: relative;
    top: -20px;
}

/* Event Page Styles */
.event-card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

@media (min-width: 768px) {
    .event-card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.event-card-2col {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.event-card-2col:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.event-card-image {
    position: relative;
    aspect-ratio: 16/9;
}

.event-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.status-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    color: white;
}

.status-active { background: #2ed573; }
.status-ended { background: #666; }

.event-card-content {
    padding: 15px;
}

.event-card-content h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--secondary-color);
}

.event-period {
    font-size: 0.85rem;
    color: #999;
    margin-bottom: 8px;
}

.event-period i {
    margin-right: 5px;
}

.event-desc {
    font-size: 0.9rem;
    color: #666;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.create-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    font-size: 1.2rem;
    box-shadow: 0 4px 10px rgba(255, 122, 0, 0.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Utility Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 2500;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: white;
    width: 90%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-md);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    border-bottom: 1px solid #eee;
    padding-bottom: 10px;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

.link-category {
    margin-bottom: 20px;
}

.link-category h3 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.link-category ul {
    list-style: none;
    padding-left: 10px;
}

.link-category li {
    margin-bottom: 8px;
}

.link-category a {
    color: var(--text-color);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

/* Nav Search Mobile Logic */
.nav-search {
    display: none;
}

@media (min-width: 768px) {
    .nav-search {
        display: block;
        margin-left: auto; /* Pushes search to the right */
        margin-right: 10px;
    }
    
    .nav-search form {
        position: relative;
    }
    
    .nav-search input {
        padding: 8px 15px 8px 35px;
        border-radius: 20px;
        border: 1px solid #ddd;
        background: #f1f1f1;
        width: 150px; /* Smaller default width */
        transition: width 0.3s;
    }
    
    .nav-search input:focus {
        width: 200px;
        outline: none;
        background: white;
        border-color: var(--primary-color);
    }
    
    .nav-search i {
        position: absolute;
        left: 12px;
        top: 50%;
        transform: translateY(-50%);
        color: #999;
    }
}

@media (min-width: 1200px) {
    .nav-search input {
        width: 250px;
    }
    .nav-search input:focus {
        width: 300px;
    }
}


/* --- お問い合わせフォームのスタイル --- */
.contact-form {
    margin-top: 30px;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--secondary-color);
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-body);
    transition: border-color 0.3s;
    background-color: #fff; /* 背景色を白に */
    appearance: none; /* OS標準のスタイルをリセット */
}
.form-group select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right .75rem center;
    background-size: 16px 12px;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}
.form-group small {
    display: block;
    margin-top: 5px;
    font-size: 0.85rem;
    color: #777;
}