:root {
    --bg-base: #000000;
    --text-main: #f4f4f5;
    --text-muted: #a1a1aa;
    --text-dim: #52525b;
    --accent: rgb(209, 148, 97);
    --accent-glow: rgba(209, 148, 97, 0.25);
    --border: rgba(255, 255, 255, 0.08);
    --surface: rgba(255, 255, 255, 0.03);
    
    /* SF Pro Display for Mac native feel */
    --font-heading: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", sans-serif;
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Ambient radial glow from top center with entrance animation */
@keyframes lightUp {
    0% {
        opacity: 0;
        transform: translateX(-50%) scale(0.6) translateY(-10vh);
        filter: blur(120px);
    }
    100% {
        opacity: 0.6;
        transform: translateX(-50%) scale(1) translateY(0);
        filter: blur(80px);
    }
}

.glow-orb {
    position: absolute;
    top: -20vh;
    left: 50%;
    transform: translateX(-50%);
    width: 80vw;
    height: 60vh;
    background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
    /* Apply subtle entrance animation */
    animation: lightUp 3.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.container {
    max-width: 900px;
    width: 100%;
    padding: 0 1.5rem;
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    animation: fadeUp 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: 0.2s;
    opacity: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-main);
    letter-spacing: -0.01em;
}

.nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 400;
    transition: color 0.15s ease;
}

.nav a:hover {
    color: var(--text-main);
}

.lang-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-main);
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.35rem 0.6rem;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    gap: 0.3rem;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.08);
}

/* Hero Section */
.hero {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-bottom: 5rem;
}

/* Badge (Pill) */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.03em;
    margin-bottom: 2rem;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.02);
}

.badge-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent);
}

/* Headings */
.title {
    font-family: var(--font-heading);
    font-size: 5rem;
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.04em;
    margin-bottom: 2rem;
    color: #ffffff;
}

.gradient-text {
    background: linear-gradient(180deg, #ffffff 0%, #71717a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Subtitle */
.subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 3.5rem;
    letter-spacing: -0.01em;
    font-weight: 400;
}

/* Features Row */
.features-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 400;
    margin-bottom: 3.5rem;
}

.feature {
    letter-spacing: 0.02em;
}

.dot {
    width: 4px;
    height: 4px;
    background-color: var(--text-dim);
    border-radius: 50%;
}

/* Action Area */
.action-area {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.5rem 0.5rem 0.5rem 1.5rem;
    background: rgba(20, 20, 20, 0.4);
    border: 1px solid var(--border);
    border-radius: 999px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 24px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.05);
}

.price-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
}

.price {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.price-desc {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Fancy Hover CTA Button */
.primary-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--text-main);
    color: var(--bg-base);
    border: none;
    padding: 0.8rem 1.4rem;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 2px 10px rgba(255,255,255,0.1);
}

.primary-btn svg {
    transition: transform 0.2s ease;
}

.primary-btn:hover {
    transform: scale(1.02);
    /* Soft gleam of accent color on hover */
    background: #ffffff;
    box-shadow: 0 0 20px rgba(209, 148, 97, 0.4), 0 2px 10px rgba(255,255,255,0.2);
}

.primary-btn:hover svg {
    transform: translateX(3px);
}

.primary-btn:active {
    transform: scale(0.98);
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-dim);
    font-size: 0.75rem;
}

/* Animations */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-up {
    opacity: 0;
    animation: fadeUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: calc(var(--delay) * 0.1s);
}

/* Language Swapping Logic */
html[lang="en"] .ja,
html[lang="ja"] .en {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    .title {
        font-size: 3.5rem;
    }
    
    .features-row {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .action-area {
        flex-direction: column;
        padding: 1.5rem;
        border-radius: 1.5rem;
        gap: 1.25rem;
        width: 100%;
        max-width: 300px;
    }
    
    .price-info {
        align-items: center;
    }
    
    .primary-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Purchase Terms */
.purchase-terms {
    margin-top: 2.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    justify-content: center;
    width: 100%;
}

.terms-list {
    list-style: none;
    display: inline-flex;
    flex-direction: column;
    gap: 0.85rem;
    align-items: flex-start;
}

.terms-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    line-height: 1.4;
}

.check-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}