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

:root {
    /* Color Palette */
    --primary-color: #4F46E5;
    --primary-dark: #3730A3;
    --primary-light: #6366F1;
    --secondary-color: #7C3AED;
    --accent-color: #EC4899;
    --danger-color: #EF4444;
    --success-color: #10B981;
    
    /* Neutrals */
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --bg-white: #FFFFFF;
    --bg-light: #F9FAFB;
    --bg-gray: #F3F4F6;
    --border-color: #E5E7EB;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hero: linear-gradient(135deg, rgba(79, 70, 229, 0.95) 0%, rgba(124, 58, 237, 0.95) 100%);
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-padding: 0 20px;
    
    /* Typography */
    --font-primary: 'Noto Sans JP', sans-serif;
    --font-secondary: 'Inter', sans-serif;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    line-height: 1.7;
    background-color: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

section {
    padding: var(--section-padding);
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.3;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.1rem;
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.lead-text {
    font-size: 1.3rem;
    font-weight: 500;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.emphasis-text {
    font-size: 1.4rem;
    font-weight: 700;
    text-align: center;
    margin: 2rem 0;
}

.text-primary {
    color: var(--primary-color);
}

.text-danger {
    color: var(--danger-color);
}

.highlight {
    color: white;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5), 0 2px 10px rgba(0, 0, 0, 0.4);
    font-weight: 900;
}

.highlight-inline {
    background-color: rgba(79, 70, 229, 0.1);
    padding: 0.2em 0.5em;
    border-radius: 4px;
    color: var(--primary-color);
    font-weight: 600;
}

/* ===================================
   Buttons
   =================================== */
.cta-button {
    display: inline-block;
    padding: 16px 40px;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-family: var(--font-primary);
    text-align: center;
}

.cta-button.primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 10px 30px rgba(79, 70, 229, 0.3);
}

.cta-button.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(79, 70, 229, 0.4);
}

.cta-button.large {
    padding: 20px 60px;
    font-size: 1.3rem;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('https://www.genspark.ai/api/files/s/vdkHOvZc') center/cover;
    opacity: 0.15;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    color: #FFD700;
    margin-bottom: 1.5rem;
    line-height: 1.3;
    animation: fadeInUp 1s ease;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5), 0 2px 10px rgba(0, 0, 0, 0.4);
    font-weight: 900;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: rgba(255, 255, 255, 1);
    margin-bottom: 2.5rem;
    line-height: 1.8;
    animation: fadeInUp 1.2s ease;
    text-shadow: 0 3px 20px rgba(0, 0, 0, 0.6), 0 2px 10px rgba(0, 0, 0, 0.4);
    font-weight: 600;
}

.hero-image {
    position: relative;
    z-index: 1;
    margin-top: 3rem;
    animation: fadeInUp 1.4s ease;
}

.hero-image img {
    max-width: 900px;
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

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

/* ===================================
   Problem Section
   =================================== */
.problem {
    background: var(--bg-white);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.problem-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.problem-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
}

.problem-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.problem-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--danger-color);
}

.problem-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.problem-explanation {
    max-width: 800px;
    margin: 4rem auto 0;
    text-align: center;
}

/* ===================================
   Comparison Section
   =================================== */
.comparison {
    background: var(--bg-light);
}

.comparison-image {
    margin: 3rem 0;
    text-align: center;
}

.comparison-image img {
    max-width: 100%;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

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

.comparison-card {
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.comparison-card.negative {
    border-left: 6px solid var(--danger-color);
}

.comparison-card.positive {
    border-left: 6px solid var(--success-color);
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, rgba(124, 58, 237, 0.03) 100%);
}

.comparison-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.comparison-card ul {
    list-style: none;
}

.comparison-card li {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.05rem;
}

.comparison-card li:last-child {
    border-bottom: none;
}

/* ===================================
   Concept Section
   =================================== */
.concept {
    background: white;
}

.concept-content {
    max-width: 900px;
    margin: 3rem auto;
}

.concept-text {
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 20px;
}

.secret-sauce {
    margin-top: 3rem;
    padding: 2.5rem;
    background: white;
    border-radius: 15px;
    border: 3px solid var(--primary-color);
    position: relative;
}

.sauce-label {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
}

.sauce-title {
    font-size: 2.2rem;
    color: var(--primary-color);
    text-align: center;
    margin: 1rem 0 1.5rem;
}

.secret-sauce p {
    text-align: center;
    font-size: 1.15rem;
    line-height: 2;
}

/* ===================================
   Method Section
   =================================== */
.method {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, rgba(124, 58, 237, 0.03) 100%);
}

.method-image {
    margin: 3rem 0;
    text-align: center;
}

.method-image img {
    max-width: 100%;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.method-steps {
    max-width: 900px;
    margin: 4rem auto;
}

.step {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateX(10px);
}

.step-number {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 900;
    font-family: var(--font-secondary);
}

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

.step-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.science-note {
    background: rgba(79, 70, 229, 0.05);
    padding: 1rem 1.5rem;
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
    margin-top: 1rem;
}

.note-label {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 700;
    margin-right: 0.5rem;
}

/* ===================================
   Why Design Section
   =================================== */
.why-design {
    background: white;
}

.why-content {
    max-width: 900px;
    margin: 3rem auto;
}

.why-card {
    background: var(--bg-light);
    padding: 2.5rem;
    border-radius: 20px;
    margin-bottom: 2rem;
}

.why-card.highlight-card {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
    border: 2px solid var(--primary-color);
}

.why-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.why-card p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.design-elements {
    list-style: none;
    margin-top: 1.5rem;
}

.design-elements li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.1rem;
}

.design-elements li:last-child {
    border-bottom: none;
}

.conclusion-text {
    text-align: center;
    font-size: 1.3rem;
    font-weight: 600;
    margin-top: 2rem;
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 15px;
}

/* ===================================
   Benefits Section
   =================================== */
.benefits {
    background: var(--bg-light);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.benefit-card {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-10px);
}

.benefit-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.benefit-card h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.benefit-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.transformation {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: center;
    margin-top: 4rem;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.transformation-before,
.transformation-after {
    background: white;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.transformation-before {
    border-left: 6px solid var(--danger-color);
}

.transformation-after {
    border-left: 6px solid var(--success-color);
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, rgba(124, 58, 237, 0.03) 100%);
}

.transformation h4 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.transformation ul {
    list-style: none;
}

.transformation li {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 1.05rem;
}

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

.transformation-arrow {
    font-size: 3rem;
    color: var(--primary-color);
    font-weight: 900;
}

/* ===================================
   CTA Section
   =================================== */
.cta-section {
    background: var(--gradient-hero);
    color: white;
    text-align: center;
}

.cta-title {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: white;
}

.cta-subtitle {
    font-size: 1.3rem;
    margin-bottom: 3rem;
    opacity: 0.95;
}

.contact-form {
    max-width: 600px;
    margin: 3rem auto;
    background: white;
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
}

.form-message {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 10px;
    display: none;
}

.form-message.success {
    background: #D1FAE5;
    color: #065F46;
    display: block;
}

.form-message.error {
    background: #FEE2E2;
    color: #991B1B;
    display: block;
}

.cta-notes {
    margin-top: 3rem;
}

.cta-notes p {
    font-size: 1.1rem;
    margin: 0.5rem 0;
    opacity: 0.95;
}

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

.footer-text {
    font-size: 0.95rem;
    line-height: 1.8;
    opacity: 0.8;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .section-title {
        font-size: 2.2rem;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .transformation {
        grid-template-columns: 1fr;
    }
    
    .transformation-arrow {
        transform: rotate(90deg);
        margin: 1rem 0;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px 0;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .hero {
        min-height: 100vh;
        padding: 40px 20px;
        justify-content: flex-start;
        padding-top: 60px;
    }
    
    .hero-content {
        margin-bottom: 2rem;
    }
    
    .hero-title {
        font-size: 2.2rem;
        line-height: 1.4;
        margin-bottom: 1rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        line-height: 1.7;
        margin-bottom: 2rem;
    }
    
    .hero-image {
        margin-top: 2rem;
    }
    
    .hero-image img {
        border-radius: 15px;
    }
    
    .problem-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .cta-title {
        font-size: 2rem;
    }
    
    .contact-form {
        padding: 2rem 1.5rem;
    }
    
    .lead-text {
        font-size: 1.1rem;
    }
    
    .emphasis-text {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 30px 16px;
        padding-top: 50px;
    }
    
    .hero-title {
        font-size: 1.75rem;
        line-height: 1.4;
        margin-bottom: 1rem;
    }
    
    .hero-subtitle {
        font-size: 0.95rem;
        line-height: 1.6;
        margin-bottom: 1.5rem;
    }
    
    .hero-image {
        margin-top: 1.5rem;
    }
    
    .hero-image img {
        border-radius: 12px;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .cta-button {
        padding: 14px 30px;
        font-size: 1rem;
        width: 100%;
        max-width: 280px;
    }
    
    .cta-button.large {
        padding: 16px 40px;
        font-size: 1.05rem;
    }
}