:root {
    --primary-color: #06C755;
    /* LINE Green-ish */
    --primary-dark: #05a546;
    --text-color: #1A1A1A;
    --text-secondary: #555555;
    --bg-gradient-start: #F0F4F8;
    --bg-gradient-end: #D9E2EC;
    --card-bg: rgba(255, 255, 255, 0.85);
    --card-border: rgba(255, 255, 255, 0.5);
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --radius-md: 12px;
    --radius-lg: 24px;
}

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

body {
    font-family: 'Inter', 'Noto Sans JP', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: #f7f9fc;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 20%, rgba(6, 199, 85, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 123, 255, 0.1) 0%, transparent 40%);
    z-index: -1;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 1.5rem;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.8s ease-out;
}

.badge {
    display: inline-block;
    background-color: rgba(6, 199, 85, 0.1);
    color: var(--primary-dark);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #1a1a1a 0%, #4a4a4a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Illustration */
.illustration-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto 3rem auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background-color: #fff;
    line-height: 0;
    /* Remove bottom space for img */
}

.illustration-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Cards */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.icon-box {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    box-shadow: 0 4px 10px rgba(6, 199, 85, 0.3);
}

.icon-box svg {
    width: 24px;
    height: 24px;
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Lists & Steps */
.check-list {
    list-style: none;
    display: grid;
    gap: 1.5rem;
}

.check-list li {
    padding-left: 0;
}

.check-list strong {
    display: block;
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
    color: var(--text-color);
}

.check-list p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.step {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
    position: relative;
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    font-size: 1.5rem;
    font-weight: 800;
    color: rgba(6, 199, 85, 0.2);
    line-height: 1;
    min-width: 2rem;
    padding-top: 0.25rem;
}

.step-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
}

.step-content ul {
    list-style: none;
}

.step-content ul li {
    margin-bottom: 0.5rem;
    padding-left: 1.25rem;
    position: relative;
}

.step-content ul li::before {
    content: "•";
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

.quote {
    background-color: rgba(6, 199, 85, 0.05);
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    border-radius: 0 8px 8px 0;
    margin-top: 1rem;
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.highlight-step {
    background: linear-gradient(to right, rgba(6, 199, 85, 0.05), transparent);
    margin: -1rem -1rem 2.5rem -1rem;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(6, 199, 85, 0.1);
}

/* Grid Layout for bottom section */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr 1fr;
    }

    h1 {
        font-size: 4rem;
    }
}

.dot-list {
    list-style: none;
}

.dot-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
}

.dot-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.6rem;
    width: 6px;
    height: 6px;
    background-color: var(--primary-color);
    border-radius: 50%;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .container {
        padding: 2rem 1rem;
    }

    .card {
        padding: 1.5rem;
    }

    .step {
        flex-direction: column;
        gap: 0.5rem;
    }
}