:root {
    /* Colors */
    --color-primary: #005bd3;
    /* Shopify Blue-ish */
    --color-primary-dark: #004299;
    --color-secondary: #f4f6f8;
    --color-text-main: #202223;
    --color-text-sub: #6d7175;
    --color-background: #ffffff;
    --color-surface: #ffffff;
    --color-border: #e1e3e5;

    /* Typography */
    --font-family-base: 'Inter', 'Noto Sans JP', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.5;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

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

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section__title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-main);
}

/* Components */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn--secondary {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
}

.btn--secondary:hover {
    background-color: var(--color-secondary);
    border-color: var(--color-text-sub);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 100;
    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-primary);
}

.nav__list {
    display: flex;
    gap: var(--spacing-md);
}

.nav__link {
    color: var(--color-text-sub);
    font-weight: 500;
}

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

/* Hero Section */
.hero {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f9fafb 0%, #edf2f7 100%);
}

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

.hero__title {
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(to right, var(--color-primary), #00a2ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero__description {
    font-size: 1.125rem;
    color: var(--color-text-sub);
    margin-bottom: var(--spacing-lg);
}

.hero__actions {
    display: flex;
    gap: var(--spacing-sm);
}

.hero__image {
    position: relative;
}

.img-placeholder {
    width: 100%;
    aspect-ratio: 16/9;
    background-color: #e0e0e0;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
}

/* Features Section */
.features {
    background-color: var(--color-surface);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: transform 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.feature-card__icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card__title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.feature-card__text {
    color: var(--color-text-sub);
    font-size: 0.95rem;
}

/* About Section */
.about {
    background-color: var(--color-secondary);
    text-align: center;
}

.about__text {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.1rem;
    color: var(--color-text-main);
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-background);
}

.footer__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer__logo {
    font-size: 1.25rem;
}

.footer__copyright {
    font-size: 0.875rem;
    color: var(--color-text-sub);
}

.footer__links {
    display: flex;
    gap: var(--spacing-md);
}

.footer__link {
    font-size: 0.875rem;
    color: var(--color-text-sub);
}

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

/* Privacy Policy Content Links */
.privacy-content a {
    color: var(--color-primary);
    text-decoration: underline;
}

.privacy-content a:hover {
    color: var(--color-primary-dark);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .hero__actions {
        justify-content: center;
    }

    .hero__title {
        font-size: 2.25rem;
    }

    .nav {
        display: none;
        /* Simple mobile hide for now, can add hamburger later */
    }
}