/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #2563eb;
    --text: #1f2937;
    --text-light: #6b7280;
    --background: #ffffff;
    --background-alt: #f9fafb;
    --success: #10b981;
    --border: #e5e7eb;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.5;
    color: var(--text);
    background: var(--background);
}

.container {
    max-width: 1110px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
nav {
    height: 72px;
    border-bottom: 1px solid var(--border);
    background: var(--background);
}

nav .container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
}

/* Buttons */
.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
    text-decoration: none;
}

.btn-primary:hover {
    opacity: 0.9;
}

/* Hero section */
.hero {
    padding: 96px 0;
    text-align: center;
    background: var(--background-alt);
}

.hero h1 {
    font-size: 48px;
    line-height: 1.1;
    margin-bottom: 16px;
    color: var(--text);
}

.hero p {
    font-size: 20px;
    color: var(--text-light);
    margin-bottom: 32px;
}

.signup-form {
    display: flex;
    gap: 12px;
    max-width: 460px;
    margin: 0 auto;
}

.signup-form input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 16px;
}

/* Prices section */
.prices {
    padding: 64px 0;
}

.price-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
}

.coin {
    display: flex;
    align-items: center;
    gap: 12px;
}

.coin-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.btc {
    background: #f7931a;
}

.eth {
    background: #627eea;
}

.price-info {
    text-align: right;
}

.price {
    font-weight: 600;
    margin-bottom: 4px;
}

.change {
    font-size: 14px;
    padding: 2px 8px;
    border-radius: 4px;
}

.change.positive {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

/* Features section */
.features {
    padding: 64px 0;
    background: var(--background-alt);
}

.features .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.feature {
    text-align: center;
}

.feature h3 {
    margin-bottom: 8px;
    color: var(--text);
}

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

/* Footer */
footer {
    padding: 24px 0;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
}

/* Responsive design */
@media (max-width: 768px) {
    .nav-links a:not(:last-child) {
        display: none;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .signup-form {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}