:root {
    --color-primary: #00B900;
    /* LINE Greenish but slightly adjusted for premium feel */
    --color-primary-dark: #008f00;
    --color-accent: #06C755;
    --color-dark: #1A1A1A;
    --color-gray: #4A4A4A;
    --color-light: #F9F9F9;
    --color-white: #FFFFFF;
    --color-bg-dark: #111111;

    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Noto Sans JP', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --border-radius: 8px;
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.05);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.1);

    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-body);
    color: var(--color-dark);
    line-height: 1.8;
    background-color: var(--color-white);
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    line-height: 1.3;
    letter-spacing: 0.05em;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-xl) 0;
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: var(--spacing-sm) 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark);
    letter-spacing: 0.1em;
}

.nav__list {
    display: none;
}

@media (min-width: 768px) {
    .nav__list {
        display: flex;
        gap: var(--spacing-md);
        align-items: center;
    }
}

.nav__link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-gray);
    position: relative;
}

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

.nav__link--cta {
    background-color: var(--color-primary);
    color: var(--color-white) !important;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(6, 199, 85, 0.3);
}

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

/* Hamburger Menu */
.hamburger {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    width: 30px;
    height: 24px;
    position: relative;
    z-index: 1001;
}

@media (min-width: 768px) {
    .hamburger {
        display: none;
    }
}

.hamburger__bar {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-dark);
    position: absolute;
    transition: var(--transition);
}

.hamburger__bar:nth-child(1) {
    top: 0;
}

.hamburger__bar:nth-child(2) {
    top: 50%;
    transform: translateY(-50%);
}

.hamburger__bar:nth-child(3) {
    bottom: 0;
}

.nav.active {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-white);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.nav.active .nav__list {
    display: flex;
    flex-direction: column;
    text-align: center;
    font-size: 1.5rem;
}

/* Hero Section */
.hero {
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
    position: relative;
    padding-top: 80px;
    /* Header height */
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

@media (min-width: 900px) {
    .hero__container {
        grid-template-columns: 1fr 1fr;
    }
}

.hero__title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero__title-sub {
    display: block;
    font-size: 1rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.1em;
}

.hero__description {
    font-size: 1rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-lg);
}

.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(6, 199, 85, 0.4);
}

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(6, 199, 85, 0.5);
}

.hero__visual {
    position: relative;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero__visual-circle {
    width: 300px;
    height: 300px;
    background: linear-gradient(45deg, var(--color-primary), #a7f3d0);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    animation: morph 8s ease-in-out infinite;
    opacity: 0.8;
}

@keyframes morph {
    0% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    }

    25% {
        border-radius: 58% 42% 75% 25% / 76% 46% 54% 24%;
    }

    50% {
        border-radius: 50% 50% 33% 67% / 55% 27% 73% 45%;
    }

    75% {
        border-radius: 33% 67% 58% 42% / 63% 68% 32% 37%;
    }

    100% {
        border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    }
}

/* Section Header */
.section__header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section__title {
    font-size: 2.5rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xs);
    position: relative;
    display: inline-block;
}

.section__subtitle {
    font-size: 1rem;
    color: var(--color-gray);
}

/* About Section */
.about__content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about__text h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    margin-top: var(--spacing-md);
    color: var(--color-primary-dark);
}

.about__text p {
    margin-bottom: var(--spacing-md);
}

/* Service Section */
.service__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.card {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.03);
}

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

.card__icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.card__title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-dark);
}

.card__text {
    font-size: 0.95rem;
    color: var(--color-gray);
}

/* Flow Section */
.flow__steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    position: relative;
}

.flow__step {
    text-align: center;
    padding: var(--spacing-md);
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    border: 1px solid #eee;
    position: relative;
}

.flow__number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: #d0d0d0;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-heading);
}

.flow__step-title {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
}

/* Company Section */
.company__info {
    max-width: 800px;
    margin: 0 auto;
    border-top: 1px solid #eee;
}

.company__row {
    display: flex;
    flex-wrap: wrap;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid #eee;
}

.company__row dt {
    width: 100%;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.company__row dd {
    width: 100%;
    color: var(--color-gray);
}

@media (min-width: 600px) {
    .company__row dt {
        width: 30%;
        margin-bottom: 0;
    }

    .company__row dd {
        width: 70%;
    }
}

/* Contact Section */
.contact__form-wrapper {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-soft);
}

.contact__message {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.form__group {
    margin-bottom: var(--spacing-md);
}

.form__group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.form__group input,
.form__group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: inherit;
    transition: var(--transition);
}

.form__group input:focus,
.form__group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 185, 0, 0.1);
}

.btn--submit {
    width: 100%;
    border: none;
}

/* Footer */
.footer {
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-md) 0;
    text-align: center;
}

.footer__nav {
    margin-bottom: var(--spacing-sm);
}

.footer__list {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    padding: 0;
}

.footer__item a {
    color: #ccc;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer__item a:hover {
    color: var(--color-primary);
}

.copyright {
    font-size: 0.8rem;
    color: #999;
}

/* Animations (Intersection Observer targets) */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}
/* Plan Section */
.plan__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    align-items: flex-start;
}

.plan__card {
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    position: relative;
    border: 1px solid #eee;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.plan__card--highlight {
    border: 2px solid var(--color-primary);
    box-shadow: 0 10px 30px rgba(6, 199, 85, 0.15);
    transform: scale(1.02);
    z-index: 1;
}

.plan__badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.9rem;
    box-shadow: 0 4px 10px rgba(6, 199, 85, 0.3);
}

.plan__header {
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid #eee;
    padding-bottom: var(--spacing-md);
}

.plan__title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0;
    font-family: var(--font-heading);
}

.plan__subtitle {
    font-size: 0.9rem;
    color: var(--color-gray);
    margin-bottom: var(--spacing-sm);
}

.plan__price {
    margin: var(--spacing-sm) 0;
}

.plan__price-amount {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-heading);
}

.plan__price-currency {
    font-size: 0.9rem;
    color: var(--color-gray);
    font-weight: 500;
}

.plan__price-row {
    display: flex;
    justify-content: center;
    align-items: baseline;
    gap: 0.5rem;
}

.plan__price-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-dark);
}

.plan__desc {
    font-size: 0.95rem;
    color: var(--color-dark);
    font-weight: 500;
    line-height: 1.6;
}

.plan__features {
    text-align: left;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.plan__item {
    margin-bottom: var(--spacing-sm);
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.95rem;
    color: var(--color-gray);
}

.plan__item::before {
    content: "✔";
    color: var(--color-primary);
    position: absolute;
    left: 0;
    top: 2px;
    font-weight: 700;
}

.text-sm {
    font-size: 0.8rem;
    color: #888;
}

.plan__recommend {
    background-color: var(--color-light);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    text-align: left;
}

.plan__recommend-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: var(--spacing-xs);
    text-align: center;
}

.plan__recommend-list {
    list-style: disk;
    padding-left: 1.2rem;
}

.plan__recommend-list li {
    font-size: 0.85rem;
    margin-bottom: 0.3rem;
    color: var(--color-gray);
}

@media (max-width: 900px) {
    .plan__card--highlight {
        transform: none;
        margin: var(--spacing-md) 0;
    }
}

.logo-sub {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-left: 0.5rem;
    vertical-align: middle;
}

@media (max-width: 480px) {
    .logo-sub {
        display: block;
        margin-left: 0;
        font-size: 0.7rem;
    }
}

@media (max-width: 768px) {
    .hero {
        height: auto; /* Remove fixed height constraint */
        min-height: 100vh;
        padding-top: 120px; /* Increase padding to clear taller header */
        padding-bottom: 60px;
        align-items: flex-start; /* Align to top to avoid cutting off */
    }

    .hero__container {
        gap: 2rem;
    }

    .hero__title {
        font-size: 1.8rem; /* Reduce font size */
    }
    
    .hero__title-sub {
        font-size: 0.9rem;
    }

    .hero__visual {
        height: 250px; /* Reduce visual size */
        margin-top: 2rem;
    }
    
    .hero__visual-circle {
        width: 250px;
        height: 250px;
    }
}