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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    line-height: 1.8;
    color: #1a1a2e;
    background-color: #ffffff;
}

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

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

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 18px;
}

.logo-icon {
    font-size: 24px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: #64748b;
    transition: color 0.2s;
}

.nav-link:hover {
    color: #1a1a2e;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: 10px 24px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    font-size: 14px;
    font-weight: 600;
    border-radius: 100px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 100px;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

.btn-large {
    padding: 20px 48px;
    font-size: 18px;
}

.btn-outline {
    background: transparent;
    color: #6366f1;
    border: 2px solid #6366f1;
}

.btn-outline:hover {
    background: #6366f1;
    color: white;
}

.btn-arrow {
    transition: transform 0.2s;
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* Hero Section */
.hero {
    padding: 140px 0 100px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    overflow: hidden;
}

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

.hero-title {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 24px;
}

.hero-title-sub {
    display: block;
    font-size: 16px;
    font-weight: 600;
    color: #6366f1;
    margin-bottom: 8px;
}

.highlight {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 18px;
    color: #64748b;
    margin-bottom: 40px;
}

.hero-badges {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    color: #6366f1;
}

.hero-note {
    margin-top: 16px;
    font-size: 14px;
    color: #94a3b8;
}

/* Phone Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    position: relative;
    width: 280px;
    height: 560px;
    background: #1a1a2e;
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #000;
    border-radius: 32px;
    overflow: hidden;
    position: relative;
}

.demo-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.5s;
}

.demo-slide-1 {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 1;
}

.demo-slide-2 {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.demo-slide-3 {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.swipe-indicator {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    color: white;
    animation: bounce 2s infinite;
}

.swipe-icon {
    font-size: 24px;
}

.swipe-text {
    font-size: 12px;
    opacity: 0.8;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

/* Section Styles */
.section-title {
    font-size: 36px;
    font-weight: 900;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 16px;
    color: #64748b;
    text-align: center;
    margin-bottom: 60px;
}

/* Features Section */
.features {
    padding: 100px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature-card {
    background: #f8fafc;
    padding: 40px 32px;
    border-radius: 24px;
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-description {
    font-size: 14px;
    color: #64748b;
    line-height: 1.8;
}

/* Preparation Section */
.preparation {
    padding: 100px 0;
    background: #1a1a2e;
    color: white;
}

.preparation .section-title,
.preparation .section-subtitle {
    color: white;
}

.preparation .section-subtitle {
    opacity: 0.8;
}

.preparation-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.preparation-main {
    margin-bottom: 48px;
}

.preparation-icon {
    font-size: 64px;
    margin-bottom: 24px;
}

.preparation-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.preparation-description {
    font-size: 16px;
    line-height: 2;
    opacity: 0.9;
}

.preparation-description strong {
    color: #a5b4fc;
}

.preparation-specs {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 32px;
}

.specs-title {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    opacity: 0.7;
    margin-bottom: 20px;
}

.specs-grid {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 16px;
}

.spec-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.spec-label {
    font-size: 14px;
    opacity: 0.7;
}

.spec-value {
    font-size: 24px;
    font-weight: 700;
    color: #a5b4fc;
}

.specs-note {
    font-size: 12px;
    opacity: 0.6;
}

.preparation-tools {
    margin-top: 32px;
}

.tools-label {
    font-size: 14px;
    opacity: 0.7;
    margin-bottom: 16px;
}

.tools-list {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.tool-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
}

/* How to Section */
.howto {
    padding: 100px 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.steps {
    max-width: 700px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 32px;
    margin-bottom: 48px;
    position: relative;
}

.step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 28px;
    top: 70px;
    bottom: -32px;
    width: 2px;
    background: linear-gradient(180deg, #6366f1 0%, #e2e8f0 100%);
}

.step-number {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    font-size: 24px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.step-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.step-description {
    font-size: 15px;
    color: #64748b;
}

.howto-more {
    text-align: center;
    margin-top: 48px;
}

/* Benefits Section */
.benefits {
    padding: 100px 0;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.benefit-card {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    padding: 48px 32px;
    border-radius: 24px;
    text-align: center;
}

.benefit-stat {
    margin-bottom: 20px;
}

.benefit-number {
    display: block;
    font-size: 48px;
    font-weight: 900;
    line-height: 1;
}

.benefit-label {
    display: block;
    font-size: 14px;
    opacity: 0.9;
    margin-top: 8px;
}

.benefit-description {
    font-size: 14px;
    opacity: 0.9;
    line-height: 1.8;
}

/* Benefits Grid 4 columns */
.benefits-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.benefit-card-alt {
    background: #f8fafc;
    color: #1a1a2e;
    padding: 40px 24px;
}

.benefit-icon-large {
    font-size: 48px;
    margin-bottom: 20px;
}

.benefit-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.benefit-card-alt .benefit-description {
    opacity: 1;
    color: #64748b;
}

/* Why Swipe Section */
.why-swipe {
    padding: 100px 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.comparison {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.comparison-item {
    flex: 1;
    padding: 40px 32px;
    border-radius: 24px;
}

.comparison-old {
    background: #f1f5f9;
    border: 2px solid #e2e8f0;
}

.comparison-new {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
}

.comparison-arrow {
    display: flex;
    align-items: center;
    font-size: 32px;
    color: #6366f1;
    font-weight: 700;
}

.comparison-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    text-align: center;
}

.comparison-list {
    list-style: none;
}

.comparison-list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 12px;
    font-size: 15px;
    line-height: 1.6;
}

.comparison-old .comparison-list li::before {
    content: '✕';
    position: absolute;
    left: 0;
    color: #94a3b8;
}

.comparison-new .comparison-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    font-weight: 700;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.cta-box {
    background: #1a1a2e;
    color: white;
    padding: 80px 60px;
    border-radius: 32px;
    text-align: center;
}

.cta-title {
    font-size: 36px;
    font-weight: 900;
    margin-bottom: 16px;
}

.cta-description {
    font-size: 16px;
    opacity: 0.8;
    margin-bottom: 40px;
}

/* Footer */
.footer {
    padding: 60px 0;
    background: #1a1a2e;
    color: white;
}

.footer-inner {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 700;
    margin-bottom: 24px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
}

.footer-links a {
    font-size: 14px;
    color: #94a3b8;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

.footer-copyright {
    font-size: 12px;
    color: #64748b;
}

/* Responsive */
@media (max-width: 1024px) {
    .features-grid,
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .benefits-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-description br {
        display: none;
    }

    .hero-visual {
        order: -1;
    }

    .phone-mockup {
        width: 220px;
        height: 440px;
    }

    .features-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .step {
        flex-direction: column;
        text-align: center;
    }

    .step::after {
        display: none;
    }

    .step-number {
        margin: 0 auto;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 16px;
    }

    .cta-box {
        padding: 48px 24px;
    }

    .cta-title {
        font-size: 28px;
    }

    /* Preparation responsive */
    .preparation-description br {
        display: none;
    }

    .specs-grid {
        flex-direction: column;
        gap: 24px;
    }

    .spec-value {
        font-size: 20px;
    }

    .preparation-specs {
        padding: 24px 16px;
    }

    /* Hero badges responsive */
    .hero-badges {
        flex-wrap: wrap;
        justify-content: center;
    }

    /* Benefits 4 column responsive */
    .benefits-grid-4 {
        grid-template-columns: 1fr;
    }

    /* Comparison responsive */
    .comparison {
        flex-direction: column;
    }

    .comparison-arrow {
        transform: rotate(90deg);
        justify-content: center;
    }

    /* Column section responsive */
    .column-preview-grid {
        grid-template-columns: 1fr;
    }
}

/* Column Section (Top Page) */
.column-section {
    padding: 80px 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.column-preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.column-preview-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: #ffffff;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
}

.column-preview-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    border-color: #c7d2fe;
}

.column-preview-emoji {
    font-size: 32px;
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f1f5f9;
    border-radius: 12px;
}

.column-preview-content {
    flex: 1;
}

.column-preview-category {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: #6366f1;
    background: #eef2ff;
    padding: 4px 10px;
    border-radius: 100px;
    margin-bottom: 8px;
}

.column-preview-title {
    font-size: 15px;
    font-weight: 600;
    color: #1e293b;
    line-height: 1.5;
}

.column-more {
    text-align: center;
    margin-top: 40px;
}

@media (max-width: 768px) {
    .column-preview-grid {
        grid-template-columns: 1fr;
    }

    .column-preview-card {
        padding: 20px;
    }

    .column-preview-emoji {
        width: 48px;
        height: 48px;
        font-size: 24px;
    }

    .column-preview-title {
        font-size: 14px;
    }
}