/* FocusBuddy ランディングページ CSS */

:root {
    /* 可愛いパステル配色に変更 - アプリと統一 */
    --primary-color: #ff9a9e;
    --primary-light: #fecfef;
    --primary-dark: #f093fb;
    --accent-color: #a8edea;
    --accent-light: #ffd89b;
    --accent-dark: #ffb347;
    --success-color: #a8e6cf;
    --warning-color: #ffd3a5;
    --danger-color: #ffa0ac;
    --text-color: #5d4e75;
    --text-light: #9b8aab;
    --background-color: #fff0f5;
    --background-light: #fef8ff;
    --background-dark: #f5e6f7;
    --card-color: #ffffff;
    --cute-pink: #fec5bb;
    --cute-peach: #ffd6ba;
    --cute-lavender: #d8bfd8;
    --cute-mint: #b5e5cf;
    --cute-yellow: #fff2cc;
    --cute-blue: #cce7ff;
    --border-radius: 20px;
    --shadow-sm: 0 4px 20px rgba(252, 143, 175, 0.1);
    --shadow-md: 0 6px 25px rgba(252, 143, 175, 0.15);
    --shadow-lg: 0 10px 30px rgba(252, 143, 175, 0.2);
    --transition-default: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'M PLUS Rounded 1c', 'Nunito', sans-serif;
    color: var(--text-color);
    background-color: var(--background-color);
    line-height: 1.6;
    overflow-x: hidden;
    background: linear-gradient(135deg, #fff0f5 0%, #f0f8ff 50%, #ffe5f1 100%);
}

.landing-container {
    max-width: 100%;
    overflow: hidden;
    position: relative;
}

/* ヘッダーとナビゲーション */
.landing-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 240, 245, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-default);
}

.landing-header.scrolled {
    padding: 1rem 5%;
    box-shadow: var(--shadow-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo i {
    font-size: 1.8rem;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    /* 透明背景の画像用のエフェクト */
    filter: drop-shadow(0 2px 4px rgba(255, 154, 158, 0.4)) 
            drop-shadow(0 0 8px rgba(168, 237, 234, 0.3));
    transition: all 0.3s ease;
}

.logo:hover img {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: 0 4px 12px rgba(255, 154, 158, 0.3);
    background: linear-gradient(135deg, rgba(255, 154, 158, 0.2), rgba(168, 237, 234, 0.2));
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.landing-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-default);
    position: relative;
}

.landing-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: var(--transition-default);
}

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

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

.mobile-menu {
    display: none;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition-default);
}

.mobile-menu:hover {
    transform: scale(1.1);
}

/* モバイルナビゲーション */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 350px;
    height: 100vh;
    background: var(--background-color);
    z-index: 2000;
    transition: right 0.3s ease;
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid rgba(255, 154, 158, 0.1);
}

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

.close-mobile-menu:hover {
    color: var(--primary-color);
}

.mobile-nav-links {
    list-style: none;
    padding: 1.5rem;
    margin: 0;
}

.mobile-nav-link {
    display: block;
    padding: 1rem 0;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid rgba(255, 154, 158, 0.05);
    transition: var(--transition-default);
}

.mobile-nav-link:hover {
    color: var(--primary-color);
    padding-left: 0.5rem;
}

.mobile-nav-link.highlight {
    margin-top: 1rem;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border-radius: 50px;
    text-align: center;
    border: none;
}

.mobile-nav-link.highlight:hover {
    padding-left: 1rem;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(252, 143, 175, 0.3);
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 700;
    transition: var(--transition-default);
    text-align: center;
    cursor: pointer;
    font-size: 1.1rem;
    letter-spacing: 0.5px;
}

.primary-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    box-shadow: 0 5px 15px rgba(252, 143, 175, 0.3);
}

.primary-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(252, 143, 175, 0.4);
}

.secondary-cta {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.secondary-cta:hover {
    background-color: rgba(92, 107, 192, 0.1);
    transform: translateY(-3px);
}

.nav-cta {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
}

/* ヒーローセクション */
.hero {
    padding: 12rem 5% 8rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(232, 234, 246, 0.9) 100%);
    position: relative;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 154, 158, 0.08) 0, transparent 50px),
        radial-gradient(circle at 90% 30%, rgba(168, 237, 234, 0.08) 0, transparent 70px),
        radial-gradient(circle at 30% 70%, rgba(254, 197, 187, 0.08) 0, transparent 60px),
        radial-gradient(circle at 70% 80%, rgba(216, 191, 216, 0.08) 0, transparent 50px);
    z-index: -1;
}

.hero-content {
    max-width: 650px;
    z-index: 2;
}

.hero-title {
    font-size: 3.8rem;
    line-height: 1.2;
    font-weight: 800;
    margin-bottom: 1.8rem;
    color: var(--text-color);
    text-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.hero-title .highlight::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 6px;
    bottom: 5px;
    left: 0;
    background: linear-gradient(90deg, var(--accent-light), transparent);
    opacity: 0.5;
    z-index: -1;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    color: var(--text-color);
    max-width: 90%;
    line-height: 1.6;
    font-weight: 500;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

.hero-image {
    position: relative;
    flex-shrink: 0;
    width: 45%;
    z-index: 2;
}

.device-mockup {
    position: relative;
    width: 320px;
    height: 640px;
    background: white;
    border-radius: 40px;
    box-shadow: 30px 30px 60px rgba(252, 143, 175, 0.2);
    overflow: hidden;
    padding: 12px;
    border: 8px solid #333;
    transform: rotate(-5deg);
    margin: 0 auto;
    transition: all 0.5s ease;
}

.device-mockup:hover {
    transform: rotate(-3deg) scale(1.02);
    box-shadow: 35px 35px 70px rgba(252, 143, 175, 0.25);
}

.device-mockup::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 20px;
    background: #333;
    border-radius: 0 0 20px 20px;
    z-index: 10;
}

.buddy-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 25px;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.floating-element {
    position: absolute;
    padding: 12px 18px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 8px 20px rgba(252, 143, 175, 0.2);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 6s ease-in-out infinite;
    border: 2px solid rgba(255, 154, 158, 0.2);
    font-weight: 600;
}

.floating-element i {
    font-size: 1.5rem;
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.element-1 {
    top: 20%;
    left: -40px;
    animation-delay: 0s;
}

.element-1 i {
    color: var(--success-color);
}

.element-2 {
    top: 50%;
    right: -50px;
    animation-delay: 2s;
}

.element-2 i {
    color: var(--warning-color);
}

.element-3 {
    bottom: 20%;
    left: -30px;
    animation-delay: 4s;
}

.element-3 i {
    color: var(--primary-color);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* 特徴セクション */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.section-header p {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.features {
    padding: 8rem 5%;
    background-color: var(--background-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--card-color);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-default);
    text-align: center;
    border: 2px solid rgba(255, 154, 158, 0.15);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    color: white;
    font-size: 2.5rem;
    box-shadow: 0 10px 25px rgba(252, 143, 175, 0.25);
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-card h3 {
    font-size: 1.7rem;
    margin-bottom: 1rem;
    color: var(--primary-dark);
    font-weight: 700;
}

.feature-card p {
    color: var(--text-color);
    font-size: 1.1rem;
    line-height: 1.6;
}

/* 使い方セクション */
.how-it-works {
    padding: 8rem 5%;
    background-color: var(--background-light);
}

.steps-container {
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    display: flex;
    align-items: center;
    margin-bottom: 6rem;
    position: relative;
}

.step:last-child {
    margin-bottom: 3rem;
}

.step.reverse {
    flex-direction: row-reverse;
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 2rem;
    box-shadow: 0 10px 20px rgba(92, 107, 192, 0.2);
    position: absolute;
    left: 0;
    top: 20px;
    z-index: 10;
}

.step.reverse .step-number {
    margin-right: 0;
    margin-left: 2rem;
    left: auto;
    right: 0;
}

.step-content {
    flex: 1;
    padding: 0 2rem 0 5rem;
}

.step.reverse .step-content {
    padding: 0 5rem 0 2rem;
}

.step h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary-dark);
}

.step p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.step-image {
    flex: 1;
    max-width: 300px;
}

.step-img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-default);
    transform: rotate(3deg);
}

.step.reverse .step-img {
    transform: rotate(-3deg);
}

.step-img:hover {
    transform: scale(1.05) rotate(0);
}

.cta-center {
    text-align: center;
    margin-top: 4rem;
}

/* ユーザーの声セクション */
.testimonials {
    padding: 8rem 5%;
    background-color: var(--background-light);
    position: relative;
    overflow: hidden;
}

.testimonials::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 10% 10%, rgba(92, 107, 192, 0.05) 0, transparent 80px),
        radial-gradient(circle at 90% 20%, rgba(255, 154, 158, 0.05) 0, transparent 100px),
        radial-gradient(circle at 20% 80%, rgba(254, 197, 187, 0.05) 0, transparent 90px),
        radial-gradient(circle at 80% 90%, rgba(216, 191, 216, 0.05) 0, transparent 70px);
    z-index: 0;
}

.testimonials-carousel {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    gap: 2rem;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    scroll-behavior: smooth;
    padding: 1rem 0.5rem;
    z-index: 1;
}

.testimonials-carousel::-webkit-scrollbar {
    display: none;
}

.testimonial-card {
    flex: 0 0 auto;
    width: 100%;
    background: var(--card-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-default);
    border: 1px solid rgba(255, 154, 158, 0.1);
}

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

.testimonial-content {
    margin-bottom: 1.5rem;
}

.testimonial-content p {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-color);
    line-height: 1.7;
    position: relative;
}

.testimonial-content p::before,
.testimonial-content p::after {
    content: '"';
    font-size: 3rem;
    color: var(--accent-light);
    position: absolute;
    opacity: 0.3;
}

.testimonial-content p::before {
    top: -20px;
    left: -15px;
}

.testimonial-content p::after {
    bottom: -40px;
    right: -15px;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.testimonial-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: 1rem;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    border: 3px solid var(--accent-light);
}

.testimonial-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-info h4 {
    font-size: 1.2rem;
    margin-bottom: 0.3rem;
    color: var(--primary-dark);
}

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

.testimonial-indicators {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--background-dark);
    cursor: pointer;
    transition: var(--transition-default);
}

.indicator.active {
    width: 30px;
    border-radius: 10px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

/* よくある質問セクション */
.faq {
    padding: 8rem 5%;
    background-color: var(--background-light);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1.5rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-default);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    padding: 1.5rem;
    background-color: var(--background-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition-default);
}

.faq-question h3 {
    font-size: 1.2rem;
    color: var(--primary-dark);
    margin: 0;
}

.faq-question i {
    color: var(--primary-color);
    font-size: 1rem;
    transition: var(--transition-default);
}

.faq-item.active .faq-question {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
}

.faq-item.active .faq-question h3,
.faq-item.active .faq-question i {
    color: white;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: var(--transition-default);
}

.faq-item.active .faq-answer {
    padding: 1.5rem;
    max-height: 200px;
}

.faq-answer p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.7;
}

/* 最終CTA */
.final-cta {
    padding: 10rem 5%;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    color: white;
    position: relative;
    overflow: hidden;
    border-radius: 30px 30px 0 0;
    margin-top: 2rem;
}

.final-cta-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 2;
}

.final-cta h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    font-weight: 800;
}

.final-cta p {
    font-size: 1.4rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    font-weight: 500;
}

.final-cta .primary-cta {
    background: var(--card-color);
    color: var(--primary-color);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    font-size: 1.4rem;
    padding: 1.2rem 3rem;
    border: none;
    font-weight: 800;
    letter-spacing: 1px;
}

.final-cta .primary-cta:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.final-cta-decoration {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.decoration-element {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.element-1 {
    width: 300px;
    height: 300px;
    top: -100px;
    left: -50px;
}

.element-2 {
    width: 200px;
    height: 200px;
    bottom: -50px;
    right: 10%;
}

.element-3 {
    width: 150px;
    height: 150px;
    top: 20%;
    right: -50px;
}

/* フッター */
.landing-footer {
    padding: 5rem 5% 2rem;
    background-color: #ffffff;
    border-top: 3px solid transparent;
    border-image: linear-gradient(90deg, var(--primary-color), var(--accent-color), var(--cute-mint), var(--cute-lavender)) 1;
    box-shadow: 0 -10px 30px rgba(255, 154, 158, 0.1);
    position: relative;
    overflow: hidden;
}

.landing-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, 
        var(--primary-color) 0%, 
        var(--accent-color) 25%, 
        var(--cute-mint) 50%, 
        var(--cute-lavender) 75%, 
        var(--primary-color) 100%);
    animation: borderGradient 10s linear infinite;
}

@keyframes borderGradient {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.footer-logo i {
    font-size: 2rem;
    color: var(--primary-color);
}

.footer-logo img {
    width: 45px;
    height: 45px;
    object-fit: contain;
    filter: drop-shadow(0 2px 4px rgba(255, 154, 158, 0.4)) 
            drop-shadow(0 0 8px rgba(168, 237, 234, 0.3));
    transition: transform 0.3s ease;
}

.footer-logo:hover img {
    transform: scale(1.1) rotate(-5deg);
}

.footer-logo h2 {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.footer-tagline {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 3rem;
    font-weight: 500;
}

.footer-links {
    display: flex;
    justify-content: space-between;
    width: 100%;
    max-width: 900px;
    margin-bottom: 3rem;
}

.footer-column h3 {
    font-size: 1.3rem;
    color: var(--primary-dark);
    margin-bottom: 1.5rem;
    position: relative;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    width: 30px;
    height: 3px;
    bottom: -8px;
    left: 0;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 0.8rem;
}

.footer-column a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition-default);
    font-weight: 400;
}

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

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icon {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    color: white;
    font-size: 1.2rem;
    transition: var(--transition-default);
    box-shadow: 0 2px 8px rgba(255, 154, 158, 0.2);
    border: 2px solid transparent;
}

.social-icon:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
}

.footer-bottom {
    width: 100%;
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 154, 158, 0.1);
    margin-top: 2rem;
}

.footer-bottom p {
    color: var(--text-color);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* デモモーダル */
.demo-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.demo-modal.show {
    opacity: 1;
    display: flex;
}

.demo-modal-content {
    width: 90%;
    max-width: 600px;
    background: white;
    border-radius: var(--border-radius);
    padding: 3rem;
    position: relative;
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: transform 0.3s ease;
    text-align: center;
}

.demo-modal.show .demo-modal-content {
    transform: translateY(0);
}

.close-modal {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition-default);
}

.close-modal:hover {
    color: var(--primary-color);
    transform: rotate(90deg);
}

.demo-modal h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-dark);
}

.demo-modal p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.buddy-welcome {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    margin: 2rem auto 3rem;
    padding: 0 1rem;
}

.buddy-welcome img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--accent-light);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    animation: pulse 2s infinite;
    flex-shrink: 0;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    }
}

.speech-bubble {
    position: relative;
    background: linear-gradient(135deg, var(--cute-pink), var(--cute-peach));
    border: 2px solid var(--accent-light);
    border-radius: 20px;
    padding: 20px;
    max-width: 250px;
    box-shadow: var(--shadow-sm);
    color: var(--text-color);
    font-weight: 600;
}

.speech-bubble::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, var(--cute-pink), var(--cute-peach));
    border-left: 2px solid var(--accent-light);
    border-bottom: 2px solid var(--accent-light);
}

.speech-bubble p {
    font-size: 1rem;
    margin: 0;
    line-height: 1.4;
}

.demo-options {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}

.demo-option {
    flex: 1;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    background: var(--background-light);
    text-align: center;
    text-decoration: none;
    color: var(--text-color);
    transition: var(--transition-default);
    border: 2px solid transparent;
}

.demo-option:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.demo-option i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.demo-option h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-dark);
}

.demo-option p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin: 0;
}

/* レスポンシブデザイン */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        padding: 10rem 5% 5rem;
        text-align: center;
    }
    
    .hero-content {
        margin-bottom: 4rem;
    }
    
    .hero-subtitle,
    .hero-cta {
        margin: 0 auto 2rem;
        justify-content: center;
    }
    
    .hero-image {
        width: 100%;
    }
    
    .step,
    .step.reverse {
        flex-direction: column;
        text-align: center;
    }
    
    .step-content,
    .step.reverse .step-content {
        padding: 0;
        margin-top: 3rem;
        margin-bottom: 2rem;
    }
    
    .step-number {
        position: static;
        margin: 0 auto 2rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 3rem;
        text-align: center;
    }
    
    .footer-column h3::after {
        left: 50%;
        transform: translateX(-50%);
    }
    
    .social-icons {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .landing-nav {
        display: none;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .nav-cta {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-header p {
        font-size: 1rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
    
    .demo-options {
        flex-direction: column;
    }
    
    .buddy-welcome {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .speech-bubble {
        max-width: 100%;
        text-align: center;
    }
    
    .speech-bubble::before {
        left: 50%;
        top: -10px;
        transform: translateX(-50%) rotate(135deg);
    }
}

@media (max-width: 480px) {
    .landing-header {
        padding: 1rem 5%;
    }
    
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .hero {
        padding: 8rem 5% 3rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .device-mockup {
        width: 220px;
        height: 450px;
    }
    
    .floating-element {
        display: none;
    }
    
    .features,
    .how-it-works,
    .testimonials,
    .faq,
    .final-cta {
        padding: 5rem 5%;
    }
    
    .section-header {
        margin-bottom: 2.5rem;
    }
    
    .step:last-child {
        margin-bottom: 0;
    }
    
    .final-cta h2 {
        font-size: 1.8rem;
    }
    
    .demo-modal-content {
        padding: 2rem;
    }
    
    .buddy-welcome img {
        width: 100px;
        height: 100px;
    }
    
    .speech-bubble {
        font-size: 0.85rem;
        padding: 15px;
    }
}