/* Base styles */
:root {
    --primary: #0052FF;
    --secondary: #05051B;
    --text: #05051B;
    --text-light: #5B616E;
    --background: #FFFFFF;
    --success: #00C087;
    --radius: 8px;
}

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

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

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

/* Header */
header {
    position: sticky;
    top: 0;
    background: var(--background);
    border-bottom: 1px solid #EAECEF;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
    padding: 0 24px;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary);
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

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

.nav-links a:hover {
    color: var(--primary);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: #0043CC;
}

.btn-text {
    color: var(--text);
}

.btn-text:hover {
    color: var(--primary);
}

/* Hero section */
.hero {
    padding: 80px 30px;

}

.hero-content {
    display: flex;
    align-items: center;
    gap: 64px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 64px;
    line-height: 1.1;
    margin-bottom: 24px;
}

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

.hero-image {
    flex: 1;
}

/* Form */
.signup-form {
    max-width: 400px;
}

.form-group {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.form-group input {
    flex: 1;
    padding: 12px;
    border: 1px solid #EAECEF;
    border-radius: var(--radius);
}

.form-note {
    font-size: 14px;
    color: var(--text-light);
}

/* Device mockup */
.device-mockup {
    background: var(--secondary);
    border-radius: 24px;
    padding: 24px;
    color: white;
}

.balance-display {
    font-size: 32px;
    margin-bottom: 16px;
}

.price-chart {
    height: 200px;
    background: linear-gradient(180deg, rgba(0,82,255,0.1) 0%, rgba(0,82,255,0) 100%);
    border-radius: var(--radius);
}

/* Crypto prices */
.price-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin: 48px 0;
}

.price-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: #F8F9FA;
    border-radius: var(--radius);
}

.crypto-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

.bitcoin { background: #F7931A; }
.ethereum { background: #627EEA; }
.tether { background: #26A17B; }

.crypto-info h3 {
    margin-bottom: 4px;
}

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

.change.positive {
    color: var(--success);
    background: rgba(0, 192, 135, 0.1);
}

.change.neutral {
    color: var(--text-light);
    background: rgba(91, 97, 110, 0.1);
}

/* Features */
.features {
    padding: 80px 0;
    background: #F8F9FA;
}

.features h2 {
    text-align: center;
    font-size: 40px;
    margin-bottom: 48px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-card {
    padding: 32px;
    background: white;
    border-radius: var(--radius);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.feature-card h3 {
    margin-bottom: 16px;
}

/* CTA section */
.cta {
    padding: 80px 0;
    text-align: center;
    background: var(--primary);
    color: white;
}

.cta h2 {
    font-size: 40px;
    margin-bottom: 16px;
}

.cta p {
    margin-bottom: 32px;
}

.cta .btn-primary {
    background: white;
    color: var(--primary);
}

/* Footer */
footer {
    padding: 64px 0 32px;
    background: var(--secondary);
    color: white;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-col h3 {
    margin-bottom: 24px;
}

.footer-col ul {
    list-style: none;
}

.footer-col a {
    color: #EAECEF;
    text-decoration: none;
    display: block;
    margin-bottom: 12px;
}

.footer-col a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    color: #EAECEF;
}

/* Responsive design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 40px;
    }
    
    .signup-form {
        margin: 0 auto;
    }
    
    .price-grid {
        grid-template-columns: 1fr;
    }
}