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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #ffffff;
    color: #000000;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 2rem 1rem;
    background-color: #ffffff;
}

.nav-btn {
    color: #000000;
    text-decoration: none;
    font-size: 1rem;
    transition: all 0.2s ease;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-btn:hover {
    text-decoration: underline;
}

main {
    flex: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
    width: 100%;
}

.hero {
    text-align: center;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 400;
    letter-spacing: 0.05em;
}

.progress-section {
    margin: 3rem 0;
}

.progress-info {
    text-align: center;
    margin-bottom: 1rem;
}

.progress-text {
    font-size: 1.25rem;
}

.progress-bar-container {
    width: 100%;
    height: 30px;
    background-color: #f0f0f0;
    border-radius: 15px;
    overflow: hidden;
    margin: 0 auto;
    max-width: 600px;
}

.progress-bar {
    height: 100%;
    background-color: #000000;
    border-radius: 15px;
    transition: width 0.3s ease;
    width: 0%;
}

.content {
    margin-top: 4rem;
    text-align: center;
    padding: 0 1rem;
}

.content p {
    margin-bottom: 1.5rem;
    font-size: 1rem;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.about-content {
    padding: 2rem 1rem;
    max-width: 700px;
    margin: 0 auto;
}

.about-content h1 {
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: 2rem;
    text-align: center;
}

.about-content h2 {
    font-size: 1.5rem;
    font-weight: 400;
    margin: 2rem 0 1rem 0;
}

.about-content p {
    margin-bottom: 1.5rem;
    font-size: 1rem;
    line-height: 1.8;
}

.about-content ul {
    margin: 1.5rem 0 1.5rem 2rem;
    line-height: 2;
}

.about-content li {
    margin-bottom: 0.5rem;
}

.about-content strong {
    font-weight: 600;
}

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: #666666;
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    .hero h1 {
        font-size: 3rem;
    }
    
    nav {
        gap: 1.5rem;
        padding: 1.5rem 1rem;
    }
    
    .progress-text {
        font-size: 1rem;
    }
}