/* ===== CSS Variables ===== */
:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #4285f4;
    --accent: #ff6b35;
    --accent-dark: #e55a2b;
    --dark: #1a1a2e;
    --dark-light: #16213e;
    --light: #f8f9fa;
    --white: #ffffff;
    --gray-100: #f1f3f4;
    --gray-200: #e8eaed;
    --gray-300: #dadce0;
    --gray-500: #9aa0a6;
    --gray-700: #5f6368;
    --success: #34a853;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hero: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
    --shadow-glow: 0 0 40px rgba(102,126,234,0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.8;
    color: var(--dark);
    background-color: var(--white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 900;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--gradient-hero);
    color: var(--white);
    text-align: center;
    padding: 2rem;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(102,126,234,0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 60%, rgba(118,75,162,0.15) 0%, transparent 50%);
    animation: heroBackground 20s ease-in-out infinite;
}

@keyframes heroBackground {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(-5%, 5%) rotate(3deg); }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255,255,255,0.2);
    animation: fadeInDown 0.8s ease-out;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, #ffd700, #ff6b35);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    opacity: 0.9;
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--accent);
    color: var(--white);
    padding: 1rem 2.5rem;
    border-radius: var(--radius-xl);
    font-size: 1.1rem;
    font-weight: 700;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(255,107,53,0.4);
    animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.cta-button:hover {
    background: var(--accent-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255,107,53,0.5);
}

.cta-button.large {
    padding: 1.25rem 3rem;
    font-size: 1.2rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.6;
    animation: fadeInUp 0.8s ease-out 1s backwards;
}

.scroll-indicator span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--white), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0%, 100% { transform: scaleY(1); opacity: 1; }
    50% { transform: scaleY(0.5); opacity: 0.5; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Credentials Section ===== */
.credentials {
    padding: 5rem 0;
    background: var(--light);
}

.credentials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.credential-card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.credential-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.credential-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.credential-label {
    font-size: 1rem;
    color: var(--gray-700);
    font-weight: 500;
}

/* ===== Problems Section ===== */
.problems {
    padding: 5rem 0;
    background: var(--white);
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.problem-card {
    background: var(--light);
    padding: 2rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: var(--transition);
    border: 2px solid transparent;
}

.problem-card:hover {
    border-color: var(--primary-light);
    transform: translateX(5px);
}

.problem-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.problem-card p {
    font-size: 1rem;
    color: var(--gray-700);
}

.solution-intro {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(102,126,234,0.1) 0%, rgba(118,75,162,0.1) 100%);
    border-radius: var(--radius-lg);
}

.solution-intro p {
    font-size: 1.2rem;
    font-weight: 500;
}

.solution-intro strong {
    color: var(--primary);
}

/* ===== Products Section ===== */
.products {
    padding: 5rem 0;
    background: var(--gradient-hero);
    color: var(--white);
}

.products .section-title {
    color: var(--white);
}

.products .section-title::after {
    background: linear-gradient(135deg, #ffd700, #ff6b35);
}

.product-card {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-lg);
    padding: 3rem;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #ffd700, #ff6b35);
}

.product-badge {
    display: inline-block;
    background: rgba(255,215,0,0.2);
    color: #ffd700;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.product-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 900;
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.product-description {
    margin-bottom: 2rem;
    opacity: 0.9;
}

.product-contents {
    margin-bottom: 2rem;
}

.product-contents li {
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    font-size: 1rem;
}

.product-contents li:last-child {
    border-bottom: none;
}

.product-price {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.price-label {
    font-size: 1rem;
    opacity: 0.8;
}

.price-value {
    font-size: 3rem;
    font-weight: 900;
    color: #ffd700;
}

.price-note {
    font-size: 0.9rem;
    opacity: 0.8;
}

.product-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: var(--radius-xl);
    font-size: 1.1rem;
    font-weight: 700;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(255,107,53,0.4);
}

.product-button:hover {
    background: var(--accent-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255,107,53,0.5);
}

.coming-soon {
    margin-top: 3rem;
}

.coming-soon h3 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.coming-soon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.coming-soon-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-align: center;
}

.coming-tag {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    margin-bottom: 1rem;
}

.coming-soon-card h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.coming-soon-card p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ===== Profile Section ===== */
.profile {
    padding: 5rem 0;
    background: var(--light);
}

.profile-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

@media (min-width: 768px) {
    .profile-card {
        flex-direction: row;
        text-align: left;
        gap: 3rem;
    }
}

.profile-avatar {
    width: 150px;
    height: 150px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    flex-shrink: 0;
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .profile-avatar {
        margin-bottom: 0;
    }
}

.profile-name {
    font-size: 1.75rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
}

.profile-tagline {
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.profile-bio p {
    color: var(--gray-700);
    margin-bottom: 1rem;
}

/* ===== CTA Section ===== */
.cta-section {
    padding: 5rem 0;
    background: var(--gradient-primary);
    color: var(--white);
    text-align: center;
}

.cta-section h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 900;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 2rem;
}

.cta-section .cta-button {
    background: var(--white);
    color: var(--primary);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.cta-section .cta-button:hover {
    background: var(--light);
    transform: translateY(-3px);
}

/* ===== Footer ===== */
.footer {
    padding: 2rem 0;
    background: var(--dark);
    color: var(--gray-500);
    text-align: center;
}

.footer p {
    font-size: 0.9rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .hero {
        padding: 4rem 1.5rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .credentials, .problems, .products, .profile, .cta-section {
        padding: 3rem 0;
    }
    
    .product-card {
        padding: 2rem 1.5rem;
    }
    
    .price-value {
        font-size: 2.5rem;
    }
}