:root {
    --primary-color: #0066cc;
    --primary-dark: #004c99;
    --accent-color: #00d4ff;
    --text-color: #333333;
    --text-light: #666666;
    --bg-light: #f9fafb;
    --white: #ffffff;
    --gray-border: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 8px;
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;
}

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

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

.container {
    width: 100%;
    margin: 0 auto;
    padding: 0 20px;
    /* Mobile First: Auto width, limited by max-width on larger screens */
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
    /* Smaller height on mobile */
}

.logo {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    line-height: 1.1;
}

.brand-name {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 2px;
}

.logo-main {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.3rem;
    color: var(--text-color);
    letter-spacing: -0.02em;
}

.logo-highlight {
    color: var(--primary-color);
}

/* Mobile First Nav: Hidden by default (handled by JS via absolute positioning) or stacked */
.nav {
    display: none;
    /* Hidden on mobile */
    /* JS toggles display: flex with flex-direction: column */
}

.nav-link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
    font-size: 0.95rem;
    padding: 10px 0;
    /* Touch-friendly target */
}

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

.mobile-menu-btn {
    display: block;
    /* Visible on mobile */
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 10px;
    /* Touch target */
}

/* Hero Section */
.hero {
    /* 背景画像としての指定を削除し、コンテンツを縦積みにする */
    position: relative;
    background-color: var(--bg-light);
    padding: 0;
    /* 画像を端まで表示するためpadding削除 */
    display: block;
    /* Flex centerをやめる */
    min-height: auto;
}

.hero-visual {
    width: 100%;
    line-height: 0;
    /* img下の隙間削除 */
}

.hero-visual img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
    /* アスペクト比維持 */
}

.hero-home {
    background-image: none;
    background-color: var(--bg-light);
}

.hero-bg-overlay {
    display: none;
}

.hero-content {
    /* 画像の下に配置される通常のブロック要素として再定義 */
    position: static;
    max-width: 800px;
    margin: 40px auto 0;
    /* 上に余白 */
    padding: 0 20px;
    background: transparent;
    border-radius: 0;
    box-shadow: none;
    backdrop-filter: none;
    text-align: center;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--primary-dark);
}

.hero-subtitle {
    font-size: 1rem;
    margin-bottom: 30px;
    line-height: 1.6;
    color: var(--text-light);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    width: 100%;
    /* Full width on mobile */
    max-width: 300px;
    /* But not too wide */
}

/* Tablet & Desktop Overrides for Hero */
@media (min-width: 769px) {
    .hero-content {
        margin: 60px auto 30px;
        /* Reduced bottom margin */
        padding: 0;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }
}

.btn-primary {
    background-color: var(--white);
    color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--primary-color);
    /* Added border for better visibility if white on white */
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    background-color: #f0f9ff;
}

/* Legal & Privacy spacing overrides */
.legal-section,
.privacy-section,
.company-section {
    padding: 10px 0 60px;
    /* Minimal top padding */
    background-color: var(--white);
}

/* Tighten spacing for text-based pages (Company, Privacy, Tokusho) */
.hero-home {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 180px;
    /* Provide some height to the box */
    padding: 0;
    text-align: center;
}

.hero-home .hero-content {
    margin: 0 !important;
    /* Remove top margin to center strictly */
    padding: 0;
    width: 100%;
}

.hero-home .hero-title {
    margin-bottom: 0;
}

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

.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    /* Single column on mobile */
    gap: 20px;
}

.info-card {
    background: var(--bg-light);
    padding: 24px;
    border-radius: var(--radius);
    text-align: center;
    transition: transform 0.3s;
    border: 1px solid var(--gray-border);
}

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

.icon-box {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: rgba(0, 102, 204, 0.1);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.info-card h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.info-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Form Section */
.form-section {
    padding: 60px 0;
    background-color: #f0f4f8;
}

.section-title {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 10px;
    color: var(--primary-dark);
}

.warranty-form {
    width: 100%;
    margin: 0 auto;
    background: var(--white);
    padding: 30px 20px;
    /* Reduced padding on mobile */
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    /* Stacked on mobile */
    gap: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.9rem;
}

.required {
    background: #ffe4e6;
    color: #e11d48;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 6px;
    vertical-align: middle;
}

input,
select,
textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 16px;
    /* 16px to prevent zoom on IOS */
    font-family: inherit;
    transition: border-color 0.3s, box-shadow 0.3s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

textarea {
    resize: vertical;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 20px;
}

.checkbox-group input {
    width: auto;
}

.checkbox-group label {
    margin-bottom: 0;
    font-weight: 400;
    font-size: 0.9rem;
}

.checkbox-group a {
    color: var(--primary-color);
    text-decoration: underline;
}

.submit-btn {
    width: 100%;
    padding: 14px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

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

/* Footer */
.footer {
    background: #1e293b;
    color: #94a3b8;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    flex-direction: column;
    /* Stacked on mobile */
    align-items: center;
    gap: 20px;
    text-align: center;
}

.footer-logo {
    color: var(--white);
    margin-bottom: 10px;
    display: block;
}

.footer-links {
    display: flex;
    flex-direction: column;
    /* Stacked links on mobile */
    gap: 15px;
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s;
}

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

/* TABLET & DESKTOP OVERRIDES */
@media (min-width: 769px) {
    .container {
        max-width: 1200px;
    }

    .header-container {
        height: 70px;
    }

    .logo-main {
        font-size: 1.6rem;
    }

    .brand-name {
        font-size: 0.9rem;
    }

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

    .nav {
        display: flex;
        gap: 30px;
    }

    .hero {
        min-height: 500px;
    }

    .hero-content {
        max-width: 950px;
        margin: 0 auto;
        /* Centered */
        padding: 40px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .btn {
        width: auto;
    }

    .info-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .form-row {
        grid-template-columns: 1fr 1fr;
    }

    .warranty-form {
        padding: 40px;
        max-width: 700px;
    }

    .footer-content {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }

    .footer-links {
        flex-direction: row;
        gap: 20px;
    }
}

/* Blog styles */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 40px;
}

.blog-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
    position: relative;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.blog-card-image-wrapper {
    position: relative;
    width: 100%;
    padding-top: 66.66%;
    /* 3:2 Aspect Ratio (1024x683) */
    overflow: hidden;
}

.blog-card-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.blog-card:hover .blog-card-image {
    transform: scale(1.05);
}

.blog-card-category {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--primary-color);
    color: var(--white);
    padding: 6px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    z-index: 2;
}

.blog-card-content {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.blog-card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--primary-dark);
    line-height: 1.5;
}

.blog-card-excerpt {
    font-size: 0.9rem;
    color: #64748b;
    line-height: 1.6;
    margin-bottom: 20px;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.blog-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #f1f5f9;
    padding-top: 15px;
    margin-top: auto;
    font-size: 0.85rem;
    color: #94a3b8;
}

.blog-card-date i {
    margin-right: 5px;
}

.read-more {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.9rem;
}

/* Blog Detail Styles */
.blog-post-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.blog-post-content h2 {
    font-size: 1.6rem;
    color: var(--primary-dark);
    margin-top: 40px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
}

.blog-post-content h3 {
    font-size: 1.3rem;
    color: var(--primary-dark);
    margin-top: 30px;
    margin-bottom: 15px;
    border-left: 4px solid var(--primary-color);
    padding-left: 15px;
}

.blog-post-content p {
    margin-bottom: 1.5em;
    line-height: 1.8;
    color: var(--text-color);
}

.blog-post-content ul,
.blog-post-content ol {
    margin-bottom: 1.5em;
    padding-left: 1.5em;
}

.blog-post-content li {
    margin-bottom: 0.5em;
    line-height: 1.6;
}

.blog-post-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 20px 0;
}

.blog-meta {
    margin-bottom: 30px;
    color: #64748b;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--gray-border);
    padding-bottom: 20px;
    text-align: center;
}