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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #1a1a1a;
    background: #ffffff;
}

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

/* Navigation */
.nav {
    padding: 24px 0;
    border-bottom: 1px solid #e5e5e5;
}

.logo {
    font-size: 28px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    text-align: center;
}

.hero h1 {
    font-size: 56px;
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.03em;
    max-width: 900px;
    margin: 0 auto 24px;
}

.subtitle {
    font-size: 20px;
    color: #666;
    max-width: 600px;
    margin: 0 auto 48px;
}

.waitlist-form {
    display: flex;
    gap: 12px;
    max-width: 500px;
    margin: 0 auto 16px;
    justify-content: center;
}

.waitlist-form input {
    flex: 1;
    padding: 16px 20px;
    font-size: 16px;
    border: 2px solid #1a1a1a;
    border-radius: 8px;
    outline: none;
    transition: border-color 0.2s;
}

.waitlist-form input:focus {
    border-color: #000;
}

.waitlist-form button {
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    background: #1a1a1a;
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}

.waitlist-form button:hover {
    background: #000;
}

.privacy {
    font-size: 14px;
    color: #999;
}

/* Problem Section */
.problem {
    padding: 80px 0;
    background: #fafafa;
}

.problem h2 {
    font-size: 42px;
    font-weight: 600;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: 64px;
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 48px;
}

.problem-item {
    text-align: center;
}

.number {
    display: inline-block;
    width: 48px;
    height: 48px;
    line-height: 48px;
    background: #1a1a1a;
    color: #fff;
    border-radius: 50%;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
}

.problem-item h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 12px;
}

.problem-item p {
    font-size: 16px;
    color: #666;
}

/* Solution Section */
.solution {
    padding: 80px 0;
}

.solution h2 {
    font-size: 42px;
    font-weight: 600;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 20px;
    color: #666;
    text-align: center;
    margin-bottom: 80px;
}

.flow {
    display: flex;
    flex-direction: column;
    gap: 80px;
}

.flow-item {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: center;
}

.flow-item:nth-child(even) {
    direction: rtl;
}

.flow-item:nth-child(even) > * {
    direction: ltr;
}

.flow-badge {
    display: inline-block;
    padding: 6px 12px;
    background: #1a1a1a;
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.05em;
    border-radius: 4px;
    margin-bottom: 16px;
}

.flow-item h3 {
    font-size: 32px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.flow-item p {
    font-size: 18px;
    color: #666;
    line-height: 1.6;
}

.screenshot {
    background: #f5f5f5;
    border: 1px solid #e5e5e5;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0,0,0,0.06);
}

.screenshot img {
    width: 100%;
    display: block;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: #fafafa;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature p {
    font-size: 16px;
    color: #666;
    line-height: 1.6;
}

/* CTA Section */
.cta {
    padding: 120px 0;
    text-align: center;
}

.cta h2 {
    font-size: 42px;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.cta p {
    font-size: 20px;
    color: #666;
    margin-bottom: 48px;
}

/* Footer */
.footer {
    padding: 40px 0;
    border-top: 1px solid #e5e5e5;
    text-align: center;
}

.footer p {
    font-size: 14px;
    color: #999;
}

/* Success message */
.success-message {
    display: none;
    padding: 16px;
    background: #1a1a1a;
    color: #fff;
    border-radius: 8px;
    text-align: center;
    margin-top: 16px;
}

.success-message.show {
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }
    
    .subtitle {
        font-size: 18px;
    }
    
    .waitlist-form {
        flex-direction: column;
    }
    
    .problem h2,
    .solution h2,
    .cta h2 {
        font-size: 32px;
    }
    
    .flow-item {
        grid-template-columns: 1fr;
    }
    
    .flow-item:nth-child(even) {
        direction: ltr;
    }
}