/* ==========================================================================
   Base & Variables
   ========================================================================== */
:root {
    color-scheme: dark;
    /* Colors */
    --bg-color: #040b16;
    --text-main: #f8fafc;
    --text-muted: #cbd5e1;
    
    --primary: #4facfe;
    --primary-hover: #388ae3;
    --secondary: #00f2fe;
    
    --gradient-primary: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    /* Typography */
    --font-base: 'Inter', 'Noto Sans JP', sans-serif;
    
    /* Layout */
    --container-width: 1200px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Background Shapes */
.bg-shape {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    opacity: 0.4;
    pointer-events: none;
}

.bg-shape-1 {
    top: -10%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: var(--primary);
}

.bg-shape-2 {
    bottom: -10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: var(--secondary);
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

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

ul {
    list-style: none;
}

/* ==========================================================================
   Typography & Utilities
   ========================================================================== */
.text-block {
    display: inline-block;
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 4px;
}
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-subtitle {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: var(--secondary);
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.3;
}

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

/* ==========================================================================
   Components
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    border-radius: 100px;
    cursor: pointer;
    transition: var(--transition-normal);
    text-align: center;
    border: none;
    outline: none;
}

.btn-sm {
    padding: 10px 24px;
    font-size: 0.9375rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn-full {
    width: 100%;
    padding: 16px;
    font-size: 1.125rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(79, 172, 254, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(79, 172, 254, 0.4);
}

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

.btn-outline:hover {
    border-color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--glass-shadow);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition-normal);
    padding: 24px 0;
}

.header.scrolled {
    padding: 16px 0;
    background: rgba(4, 11, 22, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--gradient-primary);
    border-radius: 8px;
    color: #fff;
    font-size: 1.2rem;
}

.nav {
    display: none;
}

@media (min-width: 992px) {
    .nav {
        display: flex;
        gap: 32px;
    }
    
    .nav-link {
        font-size: 0.9375rem;
        font-weight: 500;
        color: var(--text-muted);
    }
    
    .nav-link:hover {
        color: var(--text-main);
    }
}

.mobile-menu-btn {
    display: block;
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.5rem;
    cursor: pointer;
}

@media (min-width: 992px) {
    .mobile-menu-btn {
        display: none;
    }
}

.mobile-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: rgba(4, 11, 22, 0.98);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition-normal);
}

.mobile-nav.active {
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav-link {
    font-size: 1.5rem;
    font-weight: 600;
}

.mt-4 { margin-top: 24px; }

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    position: relative;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 60px;
    align-items: center;
}

@media (min-width: 992px) {
    .hero-container {
        grid-template-columns: 1fr 1fr;
    }
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    background: rgba(79, 172, 254, 0.1);
    color: var(--primary);
    border: 1px solid rgba(79, 172, 254, 0.2);
    margin-bottom: 24px;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 24px;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3.5rem;
    }
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

@media (min-width: 576px) {
    .hero-actions {
        flex-direction: row;
    }
}

.hero-image-wrapper {
    position: relative;
}

.hero-image-card {
    padding: 16px;
    border-radius: 32px;
    position: relative;
    z-index: 2;
}

.mascot-image-container {
    width: 100%;
    aspect-ratio: 1/1;
    border-radius: 24px;
    overflow: hidden;
    position: relative;
    background: rgba(0, 0, 0, 0.2);
}

.mascot-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* 右下のウォーターマークを完全に隠すために拡大率をさらに上げます */
    transform: scale(1.15);
    transition: transform var(--transition-normal);
}

.hero-image-card:hover .mascot-img {
    transform: scale(1.2);
}

.mascot-info {
    margin-top: 24px;
    text-align: center;
}

.mascot-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(79, 172, 254, 0.15);
    color: var(--secondary);
    padding: 6px 16px;
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.mascot-name {
    font-weight: 700;
    font-size: 1.125rem;
}

.floating-badge {
    position: absolute;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    padding: 12px 20px;
    border-radius: 100px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.9375rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    z-index: 3;
    animation: float 6s ease-in-out infinite;
}

.floating-badge i {
    color: var(--primary);
    font-size: 1.25rem;
}

.fb-1 {
    top: 10%;
    left: -20px;
    animation-delay: 0s;
}

.fb-2 {
    bottom: 20%;
    right: -20px;
    animation-delay: 2s;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

/* ==========================================================================
   Concept Section
   ========================================================================== */
.concept-banner {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 40px 24px;
    gap: 24px;
}

@media (min-width: 768px) {
    .concept-banner {
        flex-direction: row;
        text-align: left;
        padding: 48px;
        gap: 40px;
    }
}

.concept-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: #fff;
    flex-shrink: 0;
    box-shadow: 0 10px 30px rgba(79, 172, 254, 0.4);
}

.concept-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.concept-desc {
    color: var(--text-muted);
    font-size: 1.125rem;
}

/* ==========================================================================
   Core Values Section
   ========================================================================== */
.values-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

@media (min-width: 768px) {
    .values-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.value-card {
    padding: 40px 32px;
    transition: var(--transition-normal);
}

.value-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.05);
}

.value-icon-wrapper {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 24px;
}

.value-icon-wrapper i {
    font-size: 3rem;
    color: var(--primary);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.value-number {
    font-size: 3rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.1);
    line-height: 1;
}

.value-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.4;
}

.value-desc {
    color: var(--text-muted);
    font-size: 1rem;
}

/* ==========================================================================
   Pricing Section
   ========================================================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    max-width: 900px;
    margin: 0 auto 40px auto;
}

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

.pricing-card {
    padding: 40px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.pricing-card.premium {
    border-color: var(--primary);
    box-shadow: 0 10px 40px rgba(79, 172, 254, 0.2);
}

.pricing-card.premium::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.premium-badge {
    position: absolute;
    top: 24px;
    right: -32px;
    background: var(--gradient-primary);
    color: #fff;
    padding: 6px 40px;
    font-size: 0.75rem;
    font-weight: 700;
    transform: rotate(45deg);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.plan-header {
    margin-bottom: 24px;
}

.plan-category {
    font-size: 0.875rem;
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 8px;
    display: block;
}

.plan-name {
    font-size: 2rem;
    font-weight: 800;
}

.plan-subtitle {
    color: var(--text-muted);
    font-size: 0.9375rem;
}

.plan-price {
    display: flex;
    align-items: baseline;
    margin-bottom: 24px;
    gap: 4px;
}

.currency {
    font-size: 1.5rem;
    font-weight: 600;
}

.amount {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1;
}

.plan-desc {
    color: var(--text-muted);
    margin-bottom: 32px;
    min-height: 48px;
}

.plan-features {
    margin-bottom: 40px;
    flex-grow: 1;
}

.plan-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 0.9375rem;
}

.plan-features i {
    color: var(--primary);
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 2px;
}

/* Option Card */
.option-card {
    max-width: 900px;
    margin: 0 auto;
    padding: 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    border-style: dashed;
}

@media (min-width: 768px) {
    .option-card {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.option-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 12px;
    letter-spacing: 0.05em;
}

.option-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.option-desc {
    color: var(--text-muted);
    font-size: 0.9375rem;
}

.option-price {
    display: flex;
    align-items: center;
    gap: 16px;
    background: rgba(0,0,0,0.3);
    padding: 16px 24px;
    border-radius: var(--border-radius-md);
}

.price-item {
    display: flex;
    flex-direction: column;
}

.price-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.price-val {
    font-size: 1.25rem;
    font-weight: 700;
}

.tax {
    font-size: 0.875rem;
    font-weight: normal;
}

.plus {
    color: var(--primary);
}

/* ==========================================================================
   CTA Section
   ========================================================================== */
.cta-box {
    text-align: center;
    padding: 60px 24px;
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.1) 0%, rgba(0, 242, 254, 0.1) 100%);
    border: 1px solid rgba(79, 172, 254, 0.2);
}

@media (min-width: 768px) {
    .cta-box {
        padding: 80px 40px;
    }
}

.cta-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 24px;
}

.cta-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 16px;
}

.cta-desc {
    color: var(--text-main);
    font-size: 1.125rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-btn {
    padding: 20px 40px;
    font-size: 1.25rem;
    box-shadow: 0 10px 30px rgba(79, 172, 254, 0.4);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    border-top: 1px solid var(--glass-border);
    padding: 40px 0;
    margin-top: 60px;
}

.footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

@media (min-width: 768px) {
    .footer-container {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    opacity: 0.8;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 0.9375rem;
}

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

.copyright {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ==========================================================================
   Animations
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }