:root {
    --primary-color: #06C755; /* LINE Green */
    --primary-hover: #05a546;
    --accent-color: #FF9800; /* Warm Orange for Premium/CTA */
    --text-main: #333333;
    --text-light: #666666;
    --bg-main: #FFFFFF;
    --bg-light: #F8F9FA;
    --bg-gray: #f0f2f5;
    --border-color: #EAEAEA;
    --font-family: 'Noto Sans JP', sans-serif;
}

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

body {
    font-family: var(--font-family);
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--bg-main);
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-bg {
    background-color: var(--bg-light);
}

/* =========================================
   Buttons
   ========================================= */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 700;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary-small {
    background-color: var(--primary-color);
    color: white;
    padding: 8px 20px;
    font-size: 0.9rem;
}

.btn-primary-small:hover {
    background-color: var(--primary-hover);
}

.btn-line, .btn-line-large {
    background-color: var(--primary-color);
    color: white;
    font-size: 1.1rem;
    box-shadow: 0 4px 10px rgba(6, 199, 85, 0.3);
}

.btn-line-large {
    padding: 16px 32px;
    font-size: 1.2rem;
}

.btn-line:hover, .btn-line-large:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(6, 199, 85, 0.4);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-main);
    border: 2px solid var(--border-color);
    width: 100%;
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
}

.btn-premium {
    background-color: var(--text-main);
    color: white;
    width: 100%;
}

.btn-premium:hover {
    background-color: #000;
}

/* =========================================
   Header
   ========================================= */
.header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--primary-color);
}

.nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav a:not(.btn) {
    font-weight: 700;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.nav a:not(.btn):hover {
    color: var(--primary-color);
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    padding: 60px 0 80px;
    overflow: hidden;
}

.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 2.2rem;
    line-height: 1.4;
    margin-bottom: 20px;
    color: var(--text-main);
}

.hero-title .highlight {
    color: var(--primary-color);
    position: relative;
    display: inline-block;
}

.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 8px;
    background-color: rgba(6, 199, 85, 0.2);
    z-index: -1;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 30px;
}

.hero-cta {
    text-align: center;
    max-width: 300px;
}

.cta-note {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: 10px;
}

/* Chat Mockup */
.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 300px;
    background-color: #8bbce1; /* LINE background color */
    border-radius: 30px;
    padding: 20px 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border: 8px solid #fff;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chat-bubble {
    padding: 12px 16px;
    border-radius: 18px;
    font-size: 0.9rem;
    max-width: 85%;
    line-height: 1.4;
}

.chat-bubble.user {
    background-color: #85e249; /* LINE user green */
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.chat-bubble.bot {
    background-color: #fff;
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}

.image-bubble .dummy-chart {
    width: 100%;
    height: 100px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    margin-top: 10px;
    border-radius: 8px;
    border: 1px solid #ddd;
}

/* =========================================
   Target Audience
   ========================================= */
.target-audience {
    padding: 80px 0;
}

.pain-points {
    background-color: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.pain-points ul li {
    margin-bottom: 20px;
    font-size: 1.05rem;
    line-height: 1.6;
    position: relative;
    padding-left: 35px;
}

.pain-points ul li i {
    color: var(--primary-color);
    font-size: 1.4rem;
    position: absolute;
    left: 0;
    top: 2px;
}

.pain-points ul li strong {
    color: var(--primary-color);
}

.solution-box {
    text-align: center;
    background: linear-gradient(135deg, rgba(6, 199, 85, 0.1) 0%, rgba(6, 199, 85, 0.05) 100%);
    padding: 30px;
    border-radius: 16px;
    border: 2px solid var(--primary-color);
    max-width: 800px;
    margin: 0 auto;
}

.solution-box h3 {
    color: var(--primary-color);
    font-size: 1.4rem;
}

/* =========================================
   Features
   ========================================= */
.features {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-top: -30px;
    margin-bottom: 50px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.feature-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
    position: relative;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.highlight-card {
    border: 2px solid var(--primary-color);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.feature-desc {
    color: var(--text-light);
    font-size: 0.95rem;
    text-align: left;
}

.premium-badge {
    display: inline-block;
    background-color: var(--text-main);
    color: white;
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 4px;
    margin-bottom: 10px;
    font-weight: bold;
}

/* =========================================
   How it Works
   ========================================= */
.how-it-works {
    padding: 80px 0;
}

.steps-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.step-item {
    flex: 1;
    text-align: center;
    position: relative;
    padding: 20px;
}

.step-number {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    margin: 0 auto 15px;
}

.step-icon {
    font-size: 2.5rem;
    color: var(--text-light);
    margin-bottom: 15px;
}

.step-item h4 {
    margin-bottom: 10px;
}

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

.step-arrow {
    color: #ccc;
    font-size: 1.5rem;
}

/* =========================================
   Pricing
   ========================================= */
.pricing {
    padding: 80px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    align-items: center;
}

.pricing-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.pricing-card.popular {
    border: 2px solid var(--primary-color);
    transform: scale(1.05);
    z-index: 1;
    box-shadow: 0 10px 30px rgba(6, 199, 85, 0.15);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--primary-color);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: bold;
    white-space: nowrap;
}

.pricing-card.premium {
    border: 2px solid var(--text-main);
}

.pricing-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.pricing-header h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.price {
    font-size: 2.5rem;
    font-weight: 900;
}

.price span {
    font-size: 1rem;
    font-weight: normal;
    color: var(--text-light);
}

.pricing-features {
    margin-bottom: 30px;
    flex-grow: 1;
}

.pricing-features li {
    margin-bottom: 15px;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.text-green { color: var(--primary-color); }
.disabled { color: #ccc; }
.limit-text { color: #d32f2f; font-size: 0.85rem; }
.highlight-text { font-weight: bold; }
.premium-text { color: var(--accent-color); }

/* =========================================
   FAQ
   ========================================= */
.faq {
    padding: 80px 0;
}

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

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

.faq-question {
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.faq-question h4 {
    font-size: 1.1rem;
    font-weight: 700;
}

.faq-icon {
    color: var(--primary-color);
    transition: transform 0.3s;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.faq-answer p {
    padding-bottom: 20px;
    color: var(--text-light);
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

/* =========================================
   Bottom CTA
   ========================================= */
.bottom-cta {
    background: linear-gradient(135deg, var(--primary-color) 0%, #04923e 100%);
    color: white;
    text-align: center;
    padding: 80px 0;
}

.bottom-cta h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.bottom-cta p {
    margin-bottom: 30px;
    font-size: 1.1rem;
    opacity: 0.9;
}

/* =========================================
   Footer
   ========================================= */
.footer {
    background-color: var(--bg-gray);
    padding: 60px 0 20px;
    color: var(--text-light);
    font-size: 0.9rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-brand h3 {
    color: var(--text-main);
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.footer-links h4 {
    color: var(--text-main);
    margin-bottom: 15px;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.disclaimer {
    border-top: 1px solid #ddd;
    padding-top: 20px;
    margin-bottom: 20px;
    font-size: 0.8rem;
    line-height: 1.5;
}

.disclaimer h4 {
    margin-bottom: 5px;
    color: var(--text-main);
}

.copyright {
    text-align: center;
    border-top: 1px solid #ddd;
    padding-top: 20px;
}

/* =========================================
   Responsive (Mobile)
   ========================================= */
@media (max-width: 768px) {
    .nav a:not(.btn) {
        display: none; /* Hide text links on mobile */
    }
    
    .hero-container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-cta {
        margin: 0 auto;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-flex {
        flex-direction: column;
        gap: 30px;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .pricing-card.popular {
        transform: none;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
}