/* Tesla風シンプルデザイン */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --black: #000000;
    --white: #ffffff;
    --gray-light: #f5f5f5;
    --gray-medium: #999999;
    --gray-dark: #333333;
    --accent: #2d5016;
    --transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--black);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ナビゲーションバー - シンプル */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 40px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--black);
    letter-spacing: -0.02em;
}

.logo {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 3rem;
}

.nav-menu a {
    text-decoration: none;
    color: var(--black);
    font-weight: 400;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
    letter-spacing: 0.01em;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--black);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-menu a:hover::after {
    width: 100%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--black);
    transition: var(--transition);
}

/* ヒーローセクション - シンプルで大胆 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    padding-top: 80px;
    overflow: hidden;
}

.hero-background-image {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        url('https://images.unsplash.com/photo-1535131749006-b7f58c99034b?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
}

.hero-background-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
}

.hero-content {
    text-align: center;
    z-index: 1;
    max-width: 900px;
    padding: 4rem 2rem;
    position: relative;
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.title-main {
    font-size: 5.5rem;
    font-weight: 300;
    line-height: 1.1;
    letter-spacing: -0.04em;
    color: var(--white);
    opacity: 0;
    animation: fadeInUp 1s ease 0.2s forwards;
}

.title-sub {
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.9);
    opacity: 0;
    animation: fadeInUp 1s ease 0.4s forwards;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 4rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 300;
    opacity: 0;
    animation: fadeInUp 1s ease 0.6s forwards;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 1s ease 0.8s forwards;
}

.btn {
    display: inline-block;
    padding: 1rem 3rem;
    border-radius: 0;
    text-decoration: none;
    font-weight: 400;
    font-size: 0.95rem;
    transition: var(--transition);
    border: 1px solid transparent;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.btn-primary {
    background: var(--white);
    color: var(--black);
    border-color: var(--white);
}

.btn-primary:hover {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--black);
    border-color: var(--white);
    transform: translateY(-2px);
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--white);
    opacity: 0.6;
    z-index: 1;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--white);
    border-bottom: 2px solid var(--white);
    transform: rotate(45deg);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

/* セクション共通 */
section {
    padding: 8rem 0;
}

.section-title {
    font-size: 3.5rem;
    font-weight: 300;
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--black);
    letter-spacing: -0.03em;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.section-title.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--gray-medium);
    margin-bottom: 5rem;
    font-weight: 300;
    letter-spacing: 0.02em;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease 0.2s, transform 0.8s ease 0.2s;
}

.section-subtitle.visible {
    opacity: 1;
    transform: translateY(0);
}

/* アプリ一覧セクション */
.apps {
    background: var(--white);
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.app-card {
    background: var(--white);
    padding: 4rem 3rem;
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    position: relative;
    opacity: 0;
    transform: translateY(50px);
}

.app-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.app-card:hover {
    border-color: var(--black);
    transform: translateY(-5px);
}

.app-badge {
    position: absolute;
    top: -12px;
    right: 30px;
    background: var(--black);
    color: var(--white);
    padding: 0.4rem 1rem;
    font-size: 0.75rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.app-icon {
    font-size: 4rem;
    text-align: center;
    margin-bottom: 2rem;
    opacity: 0.8;
}

.app-title {
    font-size: 2rem;
    font-weight: 300;
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--black);
    letter-spacing: -0.02em;
}

.app-description {
    color: var(--gray-dark);
    margin-bottom: 2rem;
    line-height: 1.8;
    font-weight: 300;
    text-align: center;
}

.app-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
    justify-content: center;
}

.app-feature-tag {
    background: var(--gray-light);
    color: var(--black);
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    font-weight: 300;
    letter-spacing: 0.05em;
}

.app-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.app-buttons .btn {
    padding: 0.9rem 2.5rem;
    font-size: 0.9rem;
}

.app-buttons .btn-primary {
    background: var(--black);
    color: var(--white);
    border-color: var(--black);
}

.app-buttons .btn-primary:hover {
    background: transparent;
    color: var(--black);
}

.app-buttons .btn-secondary {
    background: transparent;
    color: var(--black);
    border-color: var(--black);
}

.app-buttons .btn-secondary:hover {
    background: var(--black);
    color: var(--white);
}

.app-card.coming-soon {
    opacity: 0.6;
}

.app-card.coming-soon:hover {
    opacity: 0.8;
}

/* アプリ詳細セクション */
.app-details {
    background: var(--gray-light);
}

.app-details-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
    justify-content: center;
}

.app-details-icon {
    font-size: 4rem;
    opacity: 0.8;
}

.app-details-header .section-title {
    text-align: left;
    margin-bottom: 0.5rem;
}

.app-details-header .section-subtitle {
    text-align: left;
    margin-bottom: 0;
}

/* 機能セクション */
.features {
    background: transparent;
    padding: 4rem 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--white);
    padding: 3rem 2.5rem;
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: var(--transition);
    opacity: 0;
    transform: translateY(50px);
}

.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card:hover {
    border-color: var(--black);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
    opacity: 0.8;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 1rem;
    color: var(--black);
    letter-spacing: -0.01em;
}

.feature-description {
    color: var(--gray-dark);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-weight: 300;
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--gray-dark);
    font-weight: 300;
}

.feature-list li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--black);
}

/* ダウンロードセクション */
.download {
    background: var(--black);
    color: var(--white);
}

.download .section-title,
.download .section-subtitle {
    color: var(--white);
}

.download-buttons {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 4rem;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 2.5rem;
    background: var(--white);
    color: var(--black);
    border-radius: 0;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid var(--white);
    min-width: 200px;
}

.download-btn:hover {
    background: transparent;
    color: var(--white);
    transform: translateY(-3px);
}

.download-icon {
    font-size: 2rem;
}

.download-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.download-label {
    font-size: 0.75rem;
    opacity: 0.7;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.download-platform {
    font-size: 1rem;
    font-weight: 400;
    letter-spacing: 0.05em;
}

.download-note {
    text-align: center;
    margin-top: 3rem;
    opacity: 0.7;
    font-size: 0.9rem;
    font-weight: 300;
}

/* 会社についてセクション */
.about {
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6rem;
    align-items: center;
    margin-top: 4rem;
}

.about-description {
    font-size: 1.1rem;
    line-height: 1.9;
    color: var(--gray-dark);
    margin-bottom: 2rem;
    font-weight: 300;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 4rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: var(--gray-light);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.stat-item:hover {
    border-color: var(--black);
    transform: translateY(-3px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--black);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray-medium);
    font-weight: 300;
    letter-spacing: 0.05em;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 9/16;
    background: var(--gray-light);
    border: 1px solid rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--gray-medium);
}

.image-placeholder span {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.image-placeholder p {
    font-size: 1rem;
    font-weight: 300;
    letter-spacing: 0.05em;
}

/* お問い合わせセクション */
.contact {
    background: var(--gray-light);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    margin-top: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    padding: 3rem;
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    transition: var(--transition);
}

.contact-item:hover {
    border-color: var(--black);
    transform: translateY(-3px);
}

.contact-icon {
    font-size: 2rem;
    opacity: 0.7;
}

.contact-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--black);
    font-weight: 300;
    letter-spacing: -0.01em;
}

.contact-item p {
    color: var(--gray-dark);
    font-weight: 300;
    word-break: break-all;
}

/* フッター */
.footer {
    background: var(--black);
    color: var(--white);
    padding: 5rem 0 2rem;
    position: relative;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 400;
    letter-spacing: -0.02em;
}

.footer-links {
    display: flex;
    gap: 3rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.7;
    transition: var(--transition);
    font-weight: 300;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 3rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.5;
    font-size: 0.85rem;
    font-weight: 300;
}

/* レスポンシブ */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .navbar .container {
        padding: 1rem 20px;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        padding: 2rem;
        box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
        transition: left 0.4s ease;
        border-top: 1px solid rgba(0, 0, 0, 0.05);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin-bottom: 1rem;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .title-main {
        font-size: 3rem;
    }

    .title-sub {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

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

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

    .app-card {
        padding: 3rem 2rem;
    }

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

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .download-buttons {
        flex-direction: column;
        align-items: center;
    }

    .download-btn {
        width: 100%;
        max-width: 300px;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .title-main {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .app-card {
        padding: 2rem 1.5rem;
    }

    .feature-card {
        padding: 2rem 1.5rem;
    }
}