/**
 * landing.css - ランディングページ専用スタイルシート
 *
 * @description 完全独立したランディングページ用CSS（リセット込み）
 * @version 1.0.0
 * @date 2026-02-18
 *
 * 他アプリのランディングページでも再利用可能
 */

/* ===========================================
   CSS Reset
   =========================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
}

input, button, textarea, select {
    font: inherit;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

/* ===========================================
   CSS Variables
   =========================================== */
:root {
    /* Colors */
    --landing-bg-primary: #0f0a1f;
    --landing-bg-secondary: #1a1030;
    --landing-bg-card: rgba(255, 255, 255, 0.06);
    --landing-bg-card-hover: rgba(255, 255, 255, 0.1);
    --landing-bg-glass: rgba(255, 255, 255, 0.04);

    --landing-text-primary: #ffffff;
    --landing-text-secondary: rgba(255, 255, 255, 0.85);
    --landing-text-muted: rgba(255, 255, 255, 0.6);

    --landing-accent-blue: #60a5fa;
    --landing-accent-purple: #a78bfa;
    --landing-accent-pink: #f472b6;
    --landing-accent-green: #4ade80;
    --landing-accent-orange: #fb923c;

    --landing-gradient-primary: linear-gradient(135deg, #60a5fa, #a78bfa);
    --landing-gradient-hero: linear-gradient(180deg, #1a0a2e 0%, #0f0a1f 100%);

    --landing-border-color: rgba(255, 255, 255, 0.1);
    --landing-border-glass: rgba(255, 255, 255, 0.15);
    --landing-border-radius: 16px;
    --landing-border-radius-sm: 8px;
    --landing-border-radius-lg: 24px;

    /* Spacing */
    --landing-section-padding: 80px 24px;
    --landing-section-padding-mobile: 48px 16px;

    /* Transitions */
    --landing-transition: 0.3s ease;

    /* Shadows */
    --landing-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --landing-shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.4);
    --landing-shadow-glow: 0 0 30px rgba(129, 140, 248, 0.15);
}

/* ===========================================
   Base Styles
   =========================================== */
body {
    font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--landing-bg-primary);
    color: var(--landing-text-primary);
}

.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===========================================
   Hero Section
   =========================================== */
.landing-hero {
    background: var(--landing-gradient-hero);
    padding: 120px 24px 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.landing-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1520523839897-bd0b52f945a0?q=80&w=2070&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    opacity: 0.6;
    filter: brightness(1.0);
    pointer-events: none;
}

.landing-hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom,
        rgba(26, 10, 46, 0.1) 0%,
        rgba(15, 10, 31, 0.3) 60%,
        rgba(15, 10, 31, 0.75) 100%);
    pointer-events: none;
}

.landing-hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.landing-app-icon {
    width: 120px;
    height: 120px;
    border-radius: 28px;
    margin: 0 auto 24px;
    box-shadow: var(--landing-shadow-lg), 0 0 40px rgba(167, 139, 250, 0.2);
    animation: landing-float 6s ease-in-out infinite;
}

@keyframes landing-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes landing-pulse-glow {
    0%, 100% { box-shadow: 0 4px 16px rgba(96, 165, 250, 0.3); }
    50% { box-shadow: 0 4px 24px rgba(96, 165, 250, 0.5), 0 0 40px rgba(167, 139, 250, 0.2); }
}

.landing-app-name {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: var(--landing-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
}

.landing-tagline {
    font-size: 1.25rem;
    color: var(--landing-text-secondary);
    margin-bottom: 32px;
}

.landing-cta-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.landing-cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 48px;
    font-size: 1.125rem;
    font-weight: 600;
    color: #ffffff;
    background: var(--landing-gradient-primary);
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--landing-transition);
    box-shadow: 0 4px 16px rgba(96, 165, 250, 0.3);
}

.landing-cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(96, 165, 250, 0.4);
}

.landing-cta-button {
    animation: landing-pulse-glow 3s ease-in-out infinite;
}

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

.landing-badges {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 32px;
}

.landing-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--landing-text-muted);
    font-size: 0.875rem;
}

.landing-badge-icon {
    width: 20px;
    height: 20px;
    color: var(--landing-accent-green);
}

.landing-hero-note {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 8px;
}

/* ===========================================
   About Section
   =========================================== */
.landing-about {
    padding: var(--landing-section-padding);
    background: var(--landing-bg-primary);
    text-align: center;
    border-top: 1px solid var(--landing-border-color);
    position: relative;
    overflow: hidden;
}

.landing-about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1470225620780-dba8ba36b745?q=80&w=2070&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    pointer-events: none;
}

.landing-about::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom,
        rgba(15, 10, 31, 0.38) 0%,
        rgba(15, 10, 31, 0.3) 50%,
        rgba(15, 10, 31, 0.5) 100%);
    pointer-events: none;
}

.landing-about > * {
    position: relative;
    z-index: 1;
}

.landing-about-body {
    max-width: 640px;
    margin: 0 auto;
}

.landing-about-lead {
    font-size: 1.0625rem;
    color: var(--landing-text-secondary);
    line-height: 1.9;
    margin-bottom: 24px;
}

.landing-about-detail {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

/* -- Hook (展開内) -- */
.landing-about-hook {
    padding: 24px 0 32px;
    text-align: center;
}

.landing-about-hook-assumption {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--landing-text-primary);
    margin-bottom: 12px;
    line-height: 1.4;
}

.landing-about-hook-negation {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--landing-text-primary);
    margin-bottom: 28px;
}

.landing-about-hook-reveal {
    font-size: 1.0625rem;
    color: var(--landing-text-secondary);
    line-height: 2;
}

.landing-about-hook-reveal strong {
    color: var(--landing-accent-purple);
    font-weight: 700;
}

/* -- Problem (展開内) -- */
.landing-about-problem {
    padding: 28px 0;
    text-align: center;
    border-top: 1px solid var(--landing-border-color);
}

.landing-about-problem-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.landing-about-problem-lead {
    font-size: 1.0625rem;
    color: var(--landing-text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.landing-about-barrier {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: rgba(251, 146, 60, 0.1);
    border: 1px solid rgba(251, 146, 60, 0.3);
    border-radius: var(--landing-border-radius);
    padding: 20px 28px;
    text-align: left;
}

.landing-about-barrier svg {
    flex-shrink: 0;
    color: var(--landing-accent-orange);
}

.landing-about-barrier p {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--landing-text-primary);
    line-height: 1.6;
}

/* -- Solution (展開内) -- */
.landing-about-solution {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-top: 24px;
    margin-bottom: 16px;
    background: rgba(96, 165, 250, 0.06);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(96, 165, 250, 0.2);
    border-radius: var(--landing-border-radius);
    padding: 28px 32px;
    text-align: left;
}

.landing-about-solution-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(96, 165, 250, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--landing-accent-blue);
}

.landing-about-solution-title {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--landing-accent-blue);
    margin-bottom: 10px;
}

.landing-about-solution-body p {
    font-size: 0.9375rem;
    color: var(--landing-text-secondary);
    line-height: 1.8;
}

.landing-about-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.06);
    color: var(--landing-text-muted);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
}

.landing-about-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    color: var(--landing-text-secondary);
}

.landing-about-toggle svg {
    transition: transform 0.3s ease;
}

.landing-about-toggle.open svg {
    transform: rotate(180deg);
}

/* ===========================================
   Screenshots Section
   =========================================== */
.landing-screenshots {
    padding: var(--landing-section-padding);
    background: var(--landing-bg-secondary);
}

.landing-section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 48px;
}

.landing-screenshots-scroll {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    padding: 16px 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.landing-screenshots-scroll::-webkit-scrollbar {
    display: none;
}

.landing-screenshot-item {
    flex: 0 0 auto;
    scroll-snap-align: center;
}

.landing-screenshot-device {
    width: 280px;
    height: 560px;
    background: var(--landing-bg-card);
    border-radius: 36px;
    border: 8px solid #2a2a3a;
    overflow: hidden;
    box-shadow: var(--landing-shadow-lg);
    position: relative;
}

.landing-screenshot-device::before {
    display: none;
}

.landing-screenshot-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, #1a1030 0%, #0f0a1f 100%);
    color: var(--landing-text-muted);
    font-size: 0.875rem;
}

.landing-screenshot-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.landing-screenshot-caption {
    text-align: center;
    margin-top: 16px;
    color: var(--landing-text-muted);
    font-size: 0.875rem;
}

/* ===========================================
   Features Section
   =========================================== */
.landing-features {
    padding: var(--landing-section-padding);
    position: relative;
    overflow: hidden;
}

.landing-features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1451187580459-43490279c0fa?q=80&w=2072&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    pointer-events: none;
}

.landing-features::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom,
        rgba(15, 10, 31, 0.38) 0%,
        rgba(15, 10, 31, 0.28) 50%,
        rgba(15, 10, 31, 0.55) 100%);
    pointer-events: none;
}

.landing-features > * {
    position: relative;
    z-index: 1;
}

.landing-features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.landing-feature-card {
    background: var(--landing-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--landing-border-glass);
    border-radius: var(--landing-border-radius);
    padding: 32px 24px;
    text-align: center;
    transition: var(--landing-transition);
}

.landing-feature-card:hover {
    background: var(--landing-bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--landing-shadow-glow);
}

.landing-feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    font-size: 2rem;
}

.landing-feature-icon.blue {
    background: linear-gradient(135deg, rgba(96, 165, 250, 0.2), rgba(96, 165, 250, 0.1));
    color: var(--landing-accent-blue);
}

.landing-feature-icon.purple {
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.2), rgba(167, 139, 250, 0.1));
    color: var(--landing-accent-purple);
}

.landing-feature-icon.pink {
    background: linear-gradient(135deg, rgba(244, 114, 182, 0.2), rgba(244, 114, 182, 0.1));
    color: var(--landing-accent-pink);
}

.landing-feature-icon.green {
    background: linear-gradient(135deg, rgba(74, 222, 128, 0.2), rgba(74, 222, 128, 0.1));
    color: var(--landing-accent-green);
}

.landing-feature-icon.orange {
    background: linear-gradient(135deg, rgba(251, 146, 60, 0.2), rgba(251, 146, 60, 0.1));
    color: var(--landing-accent-orange);
}

.landing-feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.landing-feature-description {
    color: var(--landing-text-muted);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* ===========================================
   How It Works Section
   =========================================== */
.landing-how-it-works {
    padding: var(--landing-section-padding);
    background: var(--landing-bg-secondary);
    position: relative;
    overflow: hidden;
}

.landing-how-it-works::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1519834785169-98be25ec3f84?q=80&w=2664&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    pointer-events: none;
}

.landing-how-it-works::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom,
        rgba(26, 16, 48, 0.42) 0%,
        rgba(26, 16, 48, 0.3) 50%,
        rgba(26, 16, 48, 0.52) 100%);
    pointer-events: none;
}

.landing-how-it-works > * {
    position: relative;
    z-index: 1;
}

.landing-steps {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 700px;
    margin: 0 auto;
}

.landing-step {
    display: flex;
    align-items: flex-start;
    gap: 24px;
}

.landing-step-number {
    flex: 0 0 auto;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--landing-gradient-primary);
    border-radius: 50%;
    font-size: 1.25rem;
    font-weight: 700;
    box-shadow: 0 0 20px rgba(96, 165, 250, 0.3);
}

.landing-step-content {
    flex: 1;
}

.landing-step-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.landing-step-description {
    color: var(--landing-text-muted);
    font-size: 0.9375rem;
}

/* ===========================================
   Pricing Section
   =========================================== */
.landing-pricing {
    padding: var(--landing-section-padding);
    position: relative;
    overflow: hidden;
}

.landing-pricing::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1462331940025-496dfbfc7564?q=80&w=2048&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    pointer-events: none;
}

.landing-pricing::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom,
        rgba(15, 10, 31, 0.38) 0%,
        rgba(15, 10, 31, 0.3) 50%,
        rgba(15, 10, 31, 0.52) 100%);
    pointer-events: none;
}

.landing-pricing > * {
    position: relative;
    z-index: 1;
}

.landing-pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
    align-items: stretch;
}

.landing-pricing-card {
    background: var(--landing-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--landing-border-glass);
    border-radius: var(--landing-border-radius);
    padding: 32px;
    position: relative;
    transition: var(--landing-transition);
    display: flex;
    flex-direction: column;
}

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

.landing-pricing-card.featured {
    border-color: var(--landing-accent-purple);
    border-width: 2px;
    background: linear-gradient(180deg, rgba(167, 139, 250, 0.15) 0%, rgba(96, 165, 250, 0.08) 100%);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 0 30px rgba(167, 139, 250, 0.15), 0 4px 20px rgba(0, 0, 0, 0.3);
}

.landing-pricing-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--landing-gradient-primary);
    color: white;
    font-size: 0.8125rem;
    font-weight: 600;
    padding: 6px 20px;
    border-radius: 20px;
    letter-spacing: 0.05em;
}

.landing-pricing-card.landing-pricing-campaign {
    border-color: var(--landing-accent-green);
    border-width: 2px;
    background: linear-gradient(180deg, rgba(52, 211, 153, 0.15) 0%, rgba(96, 165, 250, 0.08) 100%);
    box-shadow: 0 0 30px rgba(52, 211, 153, 0.15), 0 4px 20px rgba(0, 0, 0, 0.3);
}

.landing-pricing-badge.landing-pricing-badge-campaign {
    background: linear-gradient(90deg, var(--landing-accent-green) 0%, var(--landing-accent-blue) 100%);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.landing-pricing-badge.landing-pricing-badge-campaign i {
    width: 14px;
    height: 14px;
}

.landing-pricing-cancel-note {
    font-size: 0.75rem;
    color: var(--landing-text-muted);
    margin-top: 8px;
    text-align: center;
}

.landing-pricing-name {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.landing-pricing-price {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.landing-pricing-price .pricing-unit {
    font-size: 1rem;
    font-weight: 400;
    color: var(--landing-text-muted);
}

.landing-pricing-price-sub {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--landing-accent-green);
    margin-bottom: 4px;
}

.landing-pricing-description {
    color: var(--landing-text-muted);
    font-size: 0.875rem;
    margin-bottom: 24px;
}

.landing-pricing-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.landing-pricing-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9375rem;
}

.landing-pricing-feature-icon {
    width: 20px;
    height: 20px;
    color: var(--landing-accent-green);
}

.landing-pricing-feature.disabled {
    color: var(--landing-text-muted);
}

.landing-pricing-feature.disabled .landing-pricing-feature-icon {
    color: var(--landing-text-muted);
}

.landing-pricing-button {
    display: block;
    width: 100%;
    padding: 16px 24px;
    font-size: 1.0625rem;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--landing-transition);
    text-align: center;
    text-decoration: none;
    margin-top: auto;
}

.landing-pricing-button.primary {
    background: var(--landing-gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(167, 139, 250, 0.35);
    position: relative;
    overflow: hidden;
}

.landing-pricing-button.primary::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -60%;
    width: 40%;
    height: 200%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    transform: skewX(-20deg);
    animation: landing-btn-shimmer 3s ease-in-out infinite;
}

@keyframes landing-btn-shimmer {
    0% { left: -60%; }
    100% { left: 120%; }
}

.landing-pricing-button.secondary {
    background: var(--landing-bg-card-hover);
    color: var(--landing-text-primary);
    border: 1px solid var(--landing-border-color);
}

.landing-pricing-button:hover {
    transform: translateY(-2px);
}

.landing-pricing-note {
    text-align: center;
    margin-top: 28px;
    font-size: 0.875rem;
    color: var(--landing-text-muted);
    line-height: 1.7;
}

/* ===========================================
   Reviews Section
   =========================================== */
.landing-reviews {
    padding: var(--landing-section-padding);
    background: var(--landing-bg-secondary);
    position: relative;
    overflow: hidden;
}

.landing-reviews::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1529156069898-49953e39b3ac?q=80&w=2076&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    pointer-events: none;
}

.landing-reviews::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom,
        rgba(26, 16, 48, 0.42) 0%,
        rgba(26, 16, 48, 0.32) 50%,
        rgba(26, 16, 48, 0.55) 100%);
    pointer-events: none;
}

.landing-reviews > * {
    position: relative;
    z-index: 1;
}

.landing-reviews-scroll {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding: 16px 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.landing-reviews-scroll::-webkit-scrollbar {
    display: none;
}

.landing-review-card {
    flex: 0 0 300px;
    scroll-snap-align: center;
    background: var(--landing-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--landing-border-glass);
    border-radius: var(--landing-border-radius);
    padding: 24px;
    transition: transform var(--landing-transition), box-shadow var(--landing-transition);
}

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

.landing-review-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.landing-review-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--landing-text-primary);
}

.landing-review-stars {
    display: flex;
    gap: 2px;
}

.landing-review-star {
    width: 16px;
    height: 16px;
}

.landing-review-comment {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--landing-text-secondary);
    margin-bottom: 16px;
}

.landing-review-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.landing-review-badge {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--landing-accent-purple);
    background: rgba(167, 139, 250, 0.1);
    border: 1px solid rgba(167, 139, 250, 0.2);
    padding: 2px 10px;
    border-radius: 20px;
}

.landing-reviews-empty {
    width: 100%;
    text-align: center;
    padding: 48px 24px;
    color: var(--landing-text-muted);
    font-size: 0.9375rem;
}

.landing-reviews-cta {
    text-align: center;
    margin-top: 32px;
}

.landing-reviews-cta-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 12px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--landing-text-primary);
    background: var(--landing-bg-card);
    border: 1px solid var(--landing-border-color);
    transition: background var(--landing-transition), border-color var(--landing-transition);
}

.landing-reviews-cta-button:hover {
    background: var(--landing-bg-card-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

.landing-reviews-cta-button svg {
    flex-shrink: 0;
}

/* ===========================================
   Rating Summary
   =========================================== */
.landing-rating-summary:empty {
    display: none;
}

.landing-rating-summary {
    display: flex;
    align-items: center;
    gap: 32px;
    max-width: 560px;
    margin: 0 auto 40px;
    padding: 28px 32px;
    background: var(--landing-bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--landing-border-glass);
    border-radius: var(--landing-border-radius);
}

.landing-rating-left {
    text-align: center;
    flex-shrink: 0;
}

.landing-rating-score {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
    color: var(--landing-text-primary);
    margin-bottom: 8px;
}

.landing-rating-stars-display {
    display: flex;
    gap: 2px;
    justify-content: center;
    margin-bottom: 6px;
}

.landing-rating-stars-display svg {
    width: 18px;
    height: 18px;
}

.landing-rating-count {
    font-size: 0.8125rem;
    color: var(--landing-text-muted);
}

.landing-rating-bars {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.landing-rating-bar-row {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    color: var(--landing-text-muted);
}

.landing-rating-bar-label {
    width: 16px;
    text-align: right;
    flex-shrink: 0;
}

.landing-rating-bar-track {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.20);
    border: 1px solid rgba(255, 255, 255, 0.10);
    border-radius: 4px;
    overflow: hidden;
    min-width: 80px;
}

.landing-rating-bar-fill {
    height: 100%;
    background: #fbbf24;
    border-radius: 4px;
    transition: width 0.6s ease;
}

.landing-rating-bar-count {
    width: 20px;
    text-align: left;
    flex-shrink: 0;
}

/* ===========================================
   Footer
   =========================================== */
.landing-footer {
    padding: 48px 24px;
    background: var(--landing-bg-secondary);
    border-top: 1px solid var(--landing-border-color);
}

.landing-footer-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.landing-footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.landing-footer-logo img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.landing-footer-logo-text {
    font-size: 1.125rem;
    font-weight: 600;
}

.landing-footer-links {
    display: flex;
    gap: 32px;
}

.landing-footer-link {
    color: var(--landing-text-muted);
    font-size: 0.875rem;
    transition: var(--landing-transition);
}

.landing-footer-link:hover {
    color: var(--landing-text-primary);
}

.landing-footer-copyright {
    color: var(--landing-text-muted);
    font-size: 0.8125rem;
}

/* ===========================================
   Responsive
   =========================================== */
@media (max-width: 768px) {
    .landing-hero {
        padding: 80px 16px 60px;
    }

    .landing-app-icon {
        width: 96px;
        height: 96px;
        border-radius: 22px;
    }

    .landing-app-name {
        font-size: 1.6rem;
        line-height: 1.3;
    }

    .landing-tagline {
        font-size: 0.9375rem;
        padding: 0 8px;
    }

    .landing-cta-button {
        padding: 14px 36px;
        font-size: 1rem;
    }

    .landing-badges {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .landing-section-title {
        font-size: 1.5rem;
    }

    .landing-screenshots,
    .landing-features,
    .landing-how-it-works,
    .landing-reviews,
    .landing-pricing,
    .landing-hook,
    .landing-problem,
    .landing-brain-piano,
    .landing-about {
        padding: var(--landing-section-padding-mobile);
    }

    .landing-about-hook-assumption {
        font-size: 1.25rem;
    }

    .landing-about-hook-reveal {
        font-size: 1rem;
    }

    .landing-about-barrier {
        flex-direction: column;
        gap: 8px;
        text-align: center;
        padding: 16px 20px;
    }

    .landing-about-solution {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: 20px;
    }

    .landing-about-solution-body {
        text-align: center;
    }

    .landing-rating-summary {
        flex-direction: column;
        gap: 20px;
        padding: 24px 20px;
    }

    .landing-rating-bars {
        width: 100%;
    }

    .landing-rating-bar-track {
        min-width: 120px;
    }

    .landing-hook-assumption {
        font-size: 1.25rem;
    }

    .landing-hook-reveal {
        font-size: 1rem;
    }

    .landing-brain-piano-flow {
        gap: 8px;
    }

    .landing-brain-piano-flow-step {
        min-width: 90px;
        padding: 14px 12px;
        font-size: 0.8125rem;
    }

    .landing-brain-piano-flow-arrow {
        display: none;
    }

    .landing-problem-barrier {
        flex-direction: column;
        gap: 8px;
        text-align: center;
        padding: 16px 20px;
    }

    .landing-solution-callout {
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
        padding: 20px;
    }

    .landing-solution-callout-body {
        text-align: center !important;
    }

    .landing-cost-grid {
        flex-direction: column;
        align-items: stretch;
    }

    .landing-cost-card {
        max-width: 100%;
    }

    .landing-cost-vs {
        text-align: center;
    }

    .landing-review-card {
        flex: 0 0 260px;
    }

    .landing-screenshot-device {
        width: 240px;
        height: 480px;
    }

    .landing-features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .landing-feature-card {
        padding: 24px 20px;
    }

    .landing-step {
        gap: 16px;
    }

    .landing-step-number {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .landing-pricing-cards {
        grid-template-columns: 1fr;
        gap: 36px;
        max-width: 400px;
    }

    .landing-footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px 24px;
    }
}

/* ===========================================
   Hook Section
   =========================================== */
.landing-hook {
    padding: 72px 24px;
    background: var(--landing-bg-primary);
    text-align: center;
    border-top: 1px solid var(--landing-border-color);
    position: relative;
    overflow: hidden;
}

.landing-hook::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1470225620780-dba8ba36b745?q=80&w=2070&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    pointer-events: none;
}

.landing-hook::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom,
        rgba(15, 10, 31, 0.38) 0%,
        rgba(15, 10, 31, 0.3) 50%,
        rgba(15, 10, 31, 0.5) 100%);
    pointer-events: none;
}

.landing-hook > * {
    position: relative;
    z-index: 1;
}

.landing-hook-assumption {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--landing-text-primary);
    margin-bottom: 12px;
    letter-spacing: 0.01em;
    line-height: 1.4;
}

.landing-hook-negation {
    font-size: 1.375rem;
    font-weight: 500;
    color: var(--landing-text-primary);
    margin-bottom: 36px;
}

.landing-hook-reveal {
    font-size: 1.125rem;
    color: var(--landing-text-secondary);
    line-height: 2;
    max-width: 560px;
    margin: 0 auto;
}

.landing-hook-reveal strong {
    color: var(--landing-accent-purple);
    font-weight: 700;
}

/* ===========================================
   Problem / Solution Section
   =========================================== */
.landing-problem {
    padding: 80px 24px;
    background: var(--landing-bg-secondary);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.landing-problem::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1507838153414-b4b713384a76?q=80&w=2070&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    opacity: 0.45;
    pointer-events: none;
}

.landing-problem::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom,
        rgba(26, 16, 48, 0.42) 0%,
        rgba(26, 16, 48, 0.32) 50%,
        rgba(26, 16, 48, 0.52) 100%);
    pointer-events: none;
}

.landing-problem > * {
    position: relative;
    z-index: 1;
}

.landing-problem .landing-section-title {
    font-size: 1.375rem;
    margin-bottom: 36px;
}

.landing-problem-body {
    max-width: 640px;
    margin: 0 auto 40px;
}

.landing-problem-lead {
    font-size: 1.0625rem;
    color: var(--landing-text-secondary);
    line-height: 1.8;
    margin-bottom: 28px;
}

.landing-problem-barrier {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: rgba(251, 146, 60, 0.1);
    border: 1px solid rgba(251, 146, 60, 0.3);
    border-radius: var(--landing-border-radius);
    padding: 20px 28px;
    margin-bottom: 28px;
    text-align: left;
}

.landing-problem-barrier svg {
    flex-shrink: 0;
    color: var(--landing-accent-orange);
}

.landing-problem-barrier p {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--landing-text-primary);
    line-height: 1.6;
}

.landing-problem-detail {
    font-size: 0.9375rem;
    color: var(--landing-text-muted);
    line-height: 1.8;
}

.landing-problem-detail--secondary {
    margin-top: 12px;
}

.landing-solution-callout {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    max-width: 640px;
    margin: 0 auto;
    background: rgba(96, 165, 250, 0.06);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(96, 165, 250, 0.2);
    border-radius: var(--landing-border-radius);
    padding: 28px 32px;
    text-align: left;
}

.landing-solution-callout-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(96, 165, 250, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--landing-accent-blue);
}

.landing-solution-callout-title {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--landing-accent-blue);
    margin-bottom: 10px;
}

.landing-solution-callout-body p {
    font-size: 0.9375rem;
    color: var(--landing-text-secondary);
    line-height: 1.8;
}

/* ===========================================
   Brain Piano Section
   =========================================== */
.landing-brain-piano {
    padding: 80px 24px;
    background: var(--landing-bg-primary);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.landing-brain-piano::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1559757175-5700dde675bc?q=80&w=2069&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    pointer-events: none;
}

.landing-brain-piano::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom,
        rgba(15, 10, 31, 0.38) 0%,
        rgba(15, 10, 31, 0.3) 50%,
        rgba(15, 10, 31, 0.5) 100%);
    pointer-events: none;
}

.landing-brain-piano > * {
    position: relative;
    z-index: 1;
}

.landing-brain-piano-body {
    max-width: 640px;
    margin: 0 auto;
}

.landing-brain-piano-lead {
    font-size: 1.0625rem;
    color: var(--landing-text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
}

.landing-brain-piano-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.landing-brain-piano-flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    background: rgba(167, 139, 250, 0.08);
    border: 1px solid rgba(167, 139, 250, 0.25);
    border-radius: var(--landing-border-radius);
    padding: 20px 20px;
    min-width: 120px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--landing-text-secondary);
}

.landing-brain-piano-flow-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(167, 139, 250, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--landing-accent-purple);
}

.landing-brain-piano-flow-arrow {
    color: var(--landing-text-muted);
    flex-shrink: 0;
}

.landing-brain-piano-detail {
    font-size: 0.9375rem;
    color: var(--landing-text-muted);
    line-height: 1.8;
    text-align: left;
}

.landing-brain-piano-detail + .landing-brain-piano-detail {
    margin-top: 12px;
}

.landing-brain-piano-detail strong {
    color: var(--landing-accent-purple);
    font-weight: 600;
}

/* ===========================================
   Cost Comparison Section
   =========================================== */
.landing-cost-compare {
    text-align: center;
}

.landing-cost-intro {
    font-size: 1rem;
    color: var(--landing-text-muted);
    margin-bottom: 40px;
    margin-top: -16px;
}

.landing-cost-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    max-width: 820px;
    margin: 0 auto 36px;
    flex-wrap: wrap;
}

.landing-cost-card {
    flex: 1;
    min-width: 240px;
    max-width: 340px;
    background: var(--landing-bg-card);
    border-radius: var(--landing-border-radius);
    padding: 28px 24px;
    text-align: left;
    border: 1px solid var(--landing-border-color);
}

.landing-cost-traditional {
    border-color: rgba(255, 255, 255, 0.15);
}

.landing-cost-app {
    border-color: rgba(96, 165, 250, 0.4);
    background: rgba(96, 165, 250, 0.06);
}

.landing-cost-card-label {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--landing-text-muted);
    margin-bottom: 12px;
}

.landing-cost-app .landing-cost-card-label {
    color: var(--landing-accent-blue);
}

.landing-cost-price-wrap {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 20px;
}

.landing-cost-amount {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--landing-text-primary);
    line-height: 1;
}

.landing-cost-tilde {
    font-size: 1.25rem;
    font-weight: 400;
}

.landing-cost-unit {
    font-size: 0.9375rem;
    color: var(--landing-text-muted);
}

.landing-cost-items {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.landing-cost-items li {
    font-size: 0.875rem;
    color: var(--landing-text-secondary);
    padding-left: 14px;
    position: relative;
    line-height: 1.5;
}

.landing-cost-items li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--landing-text-muted);
}

.landing-cost-app .landing-cost-items li::before {
    background: var(--landing-accent-blue);
}

.landing-cost-vs {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--landing-text-muted);
    flex-shrink: 0;
}

.landing-cost-conclusion {
    max-width: 520px;
    margin: 0 auto;
    font-size: 1rem;
    color: var(--landing-text-secondary);
    line-height: 1.8;
    text-align: center;
    background: rgba(74, 222, 128, 0.08);
    border: 1px solid rgba(74, 222, 128, 0.25);
    border-radius: var(--landing-border-radius);
    padding: 20px 28px;
}

.landing-cost-conclusion strong {
    color: var(--landing-accent-green);
    font-weight: 700;
}

/* ===========================================
   Mid-page CTA (Screenshots下)
   =========================================== */
.landing-mid-cta {
    text-align: center;
    margin-top: 48px;
}

.landing-mid-cta .landing-cta-secondary {
    margin-top: 12px;
}

/* ===========================================
   Final CTA Section
   =========================================== */
.landing-final-cta {
    position: relative;
    z-index: 1;
    max-width: 480px;
    margin: 0 auto;
    text-align: center;
}

.landing-final-cta-lead {
    font-size: 1.0625rem;
    color: var(--landing-text-secondary);
    line-height: 1.8;
    margin-bottom: 28px;
}

.landing-final-cta .landing-pricing-button {
    max-width: 320px;
    margin: 0 auto;
}

.landing-final-cta-note {
    margin-top: 16px;
    font-size: 0.8125rem;
    color: var(--landing-text-muted);
}

/* ===========================================
   Utilities
   =========================================== */
.landing-text-gradient {
    background: var(--landing-gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* モバイルでは<br>を非表示にして自然な折り返しにする */
@media (max-width: 768px) {
    .landing-br-desktop {
        display: none;
    }
}

/* ========================================
   究極の脳トレとは？セクション
   ======================================== */
.landing-ultimate-intro {
    padding: 64px 24px;
    background: linear-gradient(180deg, rgba(168, 85, 247, 0.04) 0%, rgba(168, 85, 247, 0.08) 100%);
}
.landing-ultimate-intro-inner {
    max-width: 760px;
    margin: 0 auto;
}
.landing-ultimate-intro-header {
    text-align: center;
    margin-bottom: 32px;
}
.landing-ultimate-intro-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(168, 85, 247, 0.15);
    border: 1px solid rgba(168, 85, 247, 0.35);
    border-radius: 999px;
    color: #c084fc;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 16px;
}
.landing-ultimate-intro-badge svg {
    width: 16px;
    height: 16px;
}
.landing-ultimate-intro-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--landing-text-primary);
    margin: 0 0 12px 0;
}
.landing-ultimate-intro-lead {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.7;
    margin: 0;
}
.landing-ultimate-intro-lead strong {
    color: #c084fc;
}
.landing-ultimate-mode-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 32px 0;
}
@media (max-width: 640px) {
    .landing-ultimate-mode-grid {
        grid-template-columns: 1fr;
    }
}
.landing-ultimate-mode-item {
    padding: 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
}
.landing-ultimate-mode-item-num {
    display: inline-block;
    width: 28px;
    height: 28px;
    line-height: 28px;
    text-align: center;
    background: rgba(168, 85, 247, 0.2);
    color: #c084fc;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.9375rem;
    margin-bottom: 8px;
}
.landing-ultimate-mode-item-title {
    font-size: 0.9375rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.95);
    margin: 0 0 4px 0;
}
.landing-ultimate-mode-item-title .landing-ultimate-mode-scale {
    color: #c084fc;
}
.landing-ultimate-mode-item-desc {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.65);
    margin: 0;
    line-height: 1.5;
}
.landing-ultimate-intro-footer {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
    text-align: center;
    margin: 0;
}