/*
 * MECHABASE - ミニマルでスタイリッシュなデザイン
 */

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

:root {
    --color-primary: #673AB7;
    --color-secondary: #512DA8;
    --color-dark: #1a1a1a;
    --color-gray: #6b7280;
    --color-light-gray: #f9fafb;
    --color-white: #ffffff;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --container-width: 1200px;
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    color: var(--color-dark);
    background-color: var(--color-white);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.page-header-offset {
    padding-top: 160px !important;
}

.bg-light {
    background: linear-gradient(to bottom, rgba(103, 58, 183, 0.02), var(--color-light-gray));
}

.section-title {
    font-size: 2.25rem;
    font-weight: 600;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-primary);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.btn-primary {
    display: inline-block;
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    font-size: 1rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.01em;
}

.btn-primary:hover {
    background-color: var(--color-secondary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(103, 58, 183, 0.3);
}

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

a:hover {
    opacity: 0.8;
}

/*
 * ヘッダー
 */
#header {
    background-color: var(--color-dark);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm) 0;
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

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

.logo a {
    display: flex;
    align-items: center;
    color: var(--color-white);
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.logo-icon {
    height: 6rem;
    width: auto;
    margin-right: 0.5rem;
}

.logo-text {
    color: var(--color-white);
}

#header nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
}

#header nav ul li a {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 400;
    font-size: 0.9375rem;
    padding: 0.5rem 0;
    position: relative;
    transition: var(--transition);
}

#header nav ul li a:hover {
    color: var(--color-primary);
}

#header nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

#header nav ul li a:hover::after {
    width: 100%;
}

/*
 * ヒーローセクション
 */
#hero {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%), url('../images/bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--color-white);
    display: flex;
    align-items: center;
    text-align: center;
    min-height: 100vh;
    position: relative;
    padding-top: 80px;
}

#hero .container {
    position: relative;
    z-index: 2;
}

#hero h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
    letter-spacing: -0.03em;
}

#hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
    opacity: 0.95;
    letter-spacing: 0.01em;
}

/*
 * コンセプトセクション
 */
#concept {
    background-color: var(--color-white);
}

#concept h3 {
    text-align: center;
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.concept-text {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--color-gray);
}

/*
 * サービスセクション
 */
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-item {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 2px solid rgba(103, 58, 183, 0.15);
    transition: var(--transition);
    text-align: center;
    position: relative;
}

.service-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--border-radius) var(--border-radius) 0 0;
    opacity: 0;
    transition: var(--transition);
}

.service-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(103, 58, 183, 0.15);
    border-color: var(--color-primary);
}

.service-item:hover::before {
    opacity: 1;
}

.service-item h4 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.service-item p {
    font-size: 0.9375rem;
    color: var(--color-gray);
    line-height: 1.7;
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    color: var(--color-white);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(103, 58, 183, 0.2);
}

.service-icon svg {
    width: 60%;
    height: 60%;
}

.service-item:hover .service-icon {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 8px 20px rgba(103, 58, 183, 0.3);
}

/*
 * お問い合わせセクション
 */
.contact-lead {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: 1.0625rem;
    color: var(--color-gray);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-form-area {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    border: 2px solid rgba(103, 58, 183, 0.1);
    box-shadow: 0 4px 16px rgba(103, 58, 183, 0.08);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
    font-size: 0.9375rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid rgba(0, 0, 0, 0.12);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(103, 58, 183, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.required {
    color: #ef4444;
    font-size: 0.75rem;
    margin-left: 0.25rem;
}

.submit-area {
    text-align: center;
    margin-top: var(--spacing-md);
}

/*
 * 事業者情報セクション
 */
#about {
    background-color: var(--color-white);
}

.about-content {
    max-width: 700px;
    margin: 0 auto;
}

.about-list {
    display: grid;
    gap: var(--spacing-md);
}

.about-list dt {
    font-weight: 600;
    color: var(--color-primary);
    font-size: 1.0625rem;
    margin-bottom: 0.5rem;
}

.about-list dd {
    color: var(--color-gray);
    line-height: 1.8;
    margin-left: 0;
}

.about-list dd ul {
    list-style: none;
    padding-left: 0;
    margin-top: 0.5rem;
}

.about-list dd ul li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
}

.about-list dd ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/*
 * プライバシーポリシーページ
 */
.privacy-content {
    max-width: 800px;
    margin: 0 auto;
    color: var(--color-dark);
}

.privacy-updated {
    text-align: right;
    color: var(--color-gray);
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-lg);
}

.privacy-section {
    margin-bottom: var(--spacing-lg);
}

.privacy-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    padding-bottom: 0.5rem;
    border-bottom: 2px solid rgba(103, 58, 183, 0.2);
}

.privacy-section p {
    line-height: 1.8;
    color: var(--color-gray);
    margin-bottom: var(--spacing-sm);
}

.privacy-section ul {
    margin-left: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.privacy-section ul li {
    line-height: 1.8;
    color: var(--color-gray);
    margin-bottom: 0.5rem;
}

.privacy-section a {
    color: var(--color-primary);
    text-decoration: underline;
}

/*
 * フッター
 */
#footer {
    background: linear-gradient(135deg, var(--color-dark) 0%, #2a1f3d 100%);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--spacing-md) 0;
    font-size: 0.875rem;
    border-top: 3px solid var(--color-primary);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

#footer p {
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

.footer-nav {
    display: flex;
    gap: var(--spacing-md);
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

/*
 * レスポンシブデザイン
 */
@media (max-width: 992px) {
    .section-padding {
        padding: var(--spacing-lg) 0;
    }
    
    .section-title {
        font-size: 1.875rem;
    }
    
    .service-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    #header .container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    #header nav ul {
        gap: var(--spacing-sm);
    }
    
    #hero {
        min-height: 80vh;
        padding-top: 100px;
    }
    
    .service-item {
        padding: var(--spacing-md);
    }
    
    .contact-form {
        padding: var(--spacing-md);
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-nav {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section-padding {
        padding: var(--spacing-md) 0;
    }
    
    .section-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-md);
    }
    
    #hero h2 {
        font-size: 1.75rem;
    }
    
    .btn-primary {
        padding: 0.75rem 1.5rem;
        font-size: 0.9375rem;
    }
}