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

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #ec4899;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #cbd5e1;
    --gray-lighter: #f1f5f9;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

body {
    font-family: 'Noto Sans JP', sans-serif;
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

body.lang-en {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-lighter);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
}

.logo svg {
    color: var(--primary);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--primary);
}

.lang-switch {
    padding: 8px 16px;
    border-radius: 6px;
    background: var(--gray-lighter);
    transition: all 0.3s ease;
}

.lang-switch:hover {
    background: var(--primary-light);
    color: var(--white) !important;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-large {
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(180deg, var(--gray-lighter) 0%, var(--white) 100%);
}

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

.hero-title {
    font-size: 56px;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 24px;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 18px;
    color: var(--gray);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat {
    text-align: left;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--gray);
}

/* Hero Visual */
.hero-visual {
    position: relative;
}

.video-preview {
    position: relative;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.video-player {
    background: var(--dark);
    border-radius: 16px;
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    margin-bottom: 24px;
    position: relative;
    overflow: hidden;
}

.video-player::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.3) 0%, rgba(236, 72, 153, 0.3) 100%);
}

.play-button {
    cursor: pointer;
    transition: transform 0.3s ease;
    z-index: 1;
}

.play-button:hover {
    transform: scale(1.1);
}

.scene-table {
    background: var(--white);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--shadow-lg);
}

.table-header {
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 16px;
    color: var(--dark);
}

.table-row {
    display: flex;
    justify-content: space-between;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 8px;
    background: var(--gray-lighter);
    transition: all 0.3s ease;
}

.table-row:hover {
    background: var(--primary-light);
    color: var(--white);
    transform: translateX(4px);
}

.scene-time {
    font-weight: 600;
    font-family: 'Courier New', monospace;
}

.scene-label {
    color: var(--gray);
}

.table-row:hover .scene-label {
    color: var(--white);
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--white);
}

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

.section-title {
    font-size: 48px;
    font-weight: 900;
    margin-bottom: 16px;
}

.section-description {
    font-size: 18px;
    color: var(--gray);
}

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

.feature-card {
    padding: 32px;
    border-radius: 16px;
    background: var(--white);
    border: 2px solid var(--gray-lighter);
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    background: var(--gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--white);
}

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

.feature-description {
    color: var(--gray);
    line-height: 1.8;
}

/* How It Works Section */
.how-it-works {
    padding: 80px 0;
    background: var(--gray-lighter);
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
    margin-top: 60px;
}

.step {
    text-align: center;
    position: relative;
}

.step::after {
    content: '→';
    position: absolute;
    top: 40px;
    right: -40px;
    font-size: 32px;
    color: var(--primary);
    font-weight: 700;
}

.step:last-child::after {
    display: none;
}

.step-number {
    font-size: 64px;
    font-weight: 900;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 24px;
}

.step-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}

.step-description {
    color: var(--gray);
    line-height: 1.8;
}

/* Demo Section */
.demo {
    padding: 80px 0;
    background: var(--white);
}

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

.upload-area {
    margin-top: 48px;
    padding: 60px;
    border: 3px dashed var(--gray-light);
    border-radius: 16px;
    background: var(--gray-lighter);
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--primary);
    background: var(--white);
}

.upload-area svg {
    color: var(--primary);
    margin-bottom: 24px;
}

.upload-area h3 {
    font-size: 24px;
    margin-bottom: 16px;
}

.upload-area p {
    color: var(--gray);
    margin: 16px 0;
}

.upload-info {
    font-size: 14px;
    margin-top: 24px !important;
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
    background: var(--gray-lighter);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 60px;
}

.pricing-card {
    background: var(--white);
    border-radius: 16px;
    padding: 40px;
    border: 2px solid var(--gray-lighter);
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.pricing-card.featured {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.badge {
    position: absolute;
    top: -12px;
    right: 40px;
    background: var(--gradient);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.pricing-header {
    text-align: center;
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 2px solid var(--gray-lighter);
}

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

.pricing-price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.price {
    font-size: 48px;
    font-weight: 900;
    color: var(--primary);
}

.period {
    font-size: 18px;
    color: var(--gray);
}

.pricing-features {
    list-style: none;
    margin-bottom: 32px;
}

.pricing-features li {
    padding: 12px 0;
    color: var(--dark);
    font-size: 16px;
}

.pricing-card button {
    width: 100%;
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-section a {
    display: block;
    color: var(--gray-light);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--white);
}

.footer-section p {
    color: var(--gray-light);
    margin-top: 16px;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--dark-light);
    text-align: center;
    color: var(--gray);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-title {
        font-size: 48px;
    }

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

    .steps {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .step::after {
        display: none;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .nav-links {
        gap: 16px;
        font-size: 14px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-description {
        font-size: 16px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .section-title {
        font-size: 36px;
    }

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

    .upload-area {
        padding: 40px 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.feature-card,
.step,
.pricing-card {
    animation: fadeIn 0.6s ease-out;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection */
::selection {
    background: var(--primary);
    color: var(--white);
}