:root {
    --background-color: #000000;
    --text-color: #f5f5f7;
    --secondary-text-color: #a1a1a6;
    --accent-color: #0071e3;
    --container-bg: #1a1a1a;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 22px;
}

/* Header and Nav */
.main-header {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(0,0,0,0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid #333;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 52px;
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 22px;
}

nav .brand {
    font-size: 1.2em;
    font-weight: 600;
    color: var(--text-color);
    text-decoration: none;
}

/* CTA Button */
.cta-button {
    background-color: var(--accent-color);
    color: #fff;
    padding: 8px 16px;
    border-radius: 980px;
    text-decoration: none;
    font-size: 0.9em;
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: #0077ed;
}

.disabled-link {
    background-color: #333 !important;
    color: #888 !important;
    cursor: not-allowed;
}

/* Sections */
section {
    padding: 120px 0;
    text-align: center;
}

/* Hero Section */
.hero-section {
    padding-top: 180px;
}

.hero-section h1 {
    font-size: 56px;
    font-weight: 600;
    margin-bottom: 16px;
}

.hero-section .subtitle {
    font-size: 24px;
    color: var(--secondary-text-color);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-image-container {
    margin-top: 60px;
}

.hero-image-container img {
    max-width: 80%;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
}

/* Features Section */
.features-section {
    background-color: #111;
}

.features-section h2 {
    font-size: 40px;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.feature-item .feature-icon {
    margin-bottom: 20px;
}

.feature-item .feature-icon svg {
    color: var(--accent-color);
    width: 48px;
    height: 48px;
}

.feature-item h3 {
    font-size: 21px;
    margin-bottom: 10px;
}

.feature-item p {
    color: var(--secondary-text-color);
}

/* How It Works Section */
.how-it-works-section h2 {
    font-size: 40px;
}

.how-it-works-section .subtitle {
    font-size: 21px;
    color: var(--secondary-text-color);
    margin-bottom: 80px;
}

.steps-container {
    display: flex;
    justify-content: space-around;
    align-items: flex-start;
    gap: 20px;
}

.step {
    max-width: 250px;
}

.step-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-color);
    border: 2px solid var(--accent-color);
    width: 40px;
    height: 40px;
    line-height: 40px;
    border-radius: 50%;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 21px;
    margin-bottom: 10px;
}

.step p {
    color: var(--secondary-text-color);
}

.step-arrow {
    font-size: 40px;
    color: var(--secondary-text-color);
    margin-top: 60px;
}

/* CTA Section */
.cta-section {
    background-color: #111;
}

.cta-section h2 {
    font-size: 40px;
    margin-bottom: 30px;
}

/* Footer */
footer {
    padding: 40px 0;
    text-align: center;
    color: var(--secondary-text-color);
    border-top: 1px solid #333;
}

footer a {
    color: var(--secondary-text-color);
    text-decoration: none;
}

footer a:hover {
    color: var(--text-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .steps-container {
        flex-direction: column;
        align-items: center;
        gap: 40px;
    }
    .step-arrow {
        transform: rotate(90deg);
        margin: 0;
    }
    .hero-section h1 {
        font-size: 40px;
    }
    .hero-section .subtitle {
        font-size: 19px;
    }
    .features-section h2, .how-it-works-section h2, .cta-section h2 {
        font-size: 32px;
    }
}