/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #667eea;
}

.cta-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white !important;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    overflow: hidden;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.highlight {
    background: linear-gradient(90deg, #ffeaa7, #fab1a0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.7;
    margin-bottom: 2rem;
    opacity: 0.9;
}

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

.app-store-btn {
    display: inline-block;
    transition: all 0.3s ease;
}

.app-store-btn img {
    height: 60px;
    filter: brightness(1.1);
}

.app-store-btn:hover {
    transform: translateY(-3px);
    filter: brightness(1.2);
}

.phone-mockup {
    position: relative;
    max-width: 300px;
    margin: 0 auto;
}

.app-screenshot {
    width: 100%;
    height: auto;
    border-radius: 30px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.phone-mockup:hover .app-screenshot {
    transform: translateY(-10px) scale(1.02);
}

/* Features Section */
.features {
    padding: 100px 0;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.7;
}

/* How It Works Section */
.how-it-works {
    padding: 100px 0;
    background: white;
}

.steps {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    margin-top: 4rem;
}

.step {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.step:nth-child(even) {
    flex-direction: row-reverse;
}

.step-number {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    width: 100%;
}

.step:nth-child(even) .step-content {
    grid-template-columns: 1fr 1fr;
}

.step-image {
    max-width: 250px;
    margin: 0 auto;
}

.step-screenshot {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.step-screenshot:hover {
    transform: scale(1.05);
}

.step-text h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
}

.step-text p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: #666;
}

/* Download Section */
.download {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

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

.download-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.download-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.app-store-btn.large img {
    height: 80px;
}

.availability {
    margin-top: 1rem;
    opacity: 0.8;
    font-size: 0.9rem;
}

/* Footer */
.footer {
    padding: 50px 0 30px;
    background: #2c3e50;
    color: white;
}

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

.footer-brand h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(90deg, #ffeaa7, #fab1a0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-cta {
        justify-content: center;
    }

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

    .step {
        flex-direction: column !important;
        text-align: center;
    }

    .step-content {
        grid-template-columns: 1fr !important;
        gap: 2rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

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

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

    .features, .how-it-works, .download {
        padding: 60px 0;
    }

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

    .step-number {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading Animation */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}