.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background: rgba(18, 18, 18, 0.8);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: var(--accent-primary);
}

.nav-button {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    margin-left: 10px;
    font-weight: bold;
    transition: background-color 0.2s;
}
.nav-button:hover {
    background-color: var(--bg-medium);
}
.nav-button-primary {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--bg-darkest);
}

.hero {
    text-align: center;
    padding: 120px 20px;
    background: linear-gradient(rgba(18,18,18,0.7), rgba(18,18,18,1)), url('https://www.transparenttextures.com/patterns/clean-gray-paper.png');
    border-bottom: 1px solid var(--border-color);
}
.hero-content h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    max-width: 800px;
    margin: 0 auto 20px auto;
}
.hero-content p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 30px auto;
    color: var(--text-secondary);
}
.cta-button {
    background-color: var(--accent-primary);
    border: none;
    color: var(--bg-darkest);
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 5px;
    cursor: pointer;
    text-transform: uppercase;
    text-decoration: none;
    transition: transform 0.2s;
}
.cta-button:hover {
    transform: scale(1.05);
}

.features, .how-it-works {
    padding: 80px 5%;
    text-align: center;
    background-color: var(--bg-dark);
}
.how-it-works {
    background-color: var(--bg-darkest);
}
h2 {
    font-size: 2.5rem;
    margin-bottom: 50px;
}
.feature-cards, .steps {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}
.card, .step {
    background-color: var(--bg-darkest);
    padding: 40px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    max-width: 350px;
}
.card .icon-placeholder {
    font-size: 3rem;
    margin-bottom: 20px;
}
.card h3, .step h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}
.card p, .step p {
    color: var(--text-secondary);
}
.step span {
    display: inline-block;
    width: 50px;
    height: 50px;
    line-height: 50px;
    border-radius: 50%;
    background-color: var(--accent-primary);
    color: var(--bg-darkest);
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 20px;
}

.main-footer {
    text-align: center;
    padding: 40px 20px;
    background-color: var(--bg-dark);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}