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

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #04111D;
    background-color: #FBFCFD;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}


/* Header Styles - OpenSea Learn Navigation */
.header {
    background-color: #FFFFFF;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #E5E8EB;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-left {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: #04111D;
    font-size: 22px;
    font-weight: 700;
}

.logo svg {
    width: 32px;
    height: 32px;
}

.nav-center {
    display: flex;
    gap: 40px;
}

.nav-link {
    text-decoration: none;
    color: #04111D;
    font-size: 15px;
    font-weight: 500;
    transition: opacity 0.2s;
    position: relative;
}

.nav-link:hover {
    opacity: 0.7;
}

.nav-link.active {
    opacity: 1;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -24px;
    left: 0;
    right: 0;
    height: 3px;
    background-color: #2081E2;
}

.nav-right {
    display: flex;
    align-items: center;
}

.opensea-button {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    background-color: #2081E2;
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    transition: background-color 0.2s;
}

.opensea-button:hover {
    background-color: #1868B7;
}

/* Hero Section */
.hero-section {
    background-color: #F8F9FA;
    padding: 80px 0 120px;
    min-height: 500px;
    position: relative;
    overflow: hidden;
}


.hero-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 80px;
    align-items: start;
    position: relative;
    z-index: 1;
}

.btc-icon {
    width: 64px;
    height: 64px;
    margin-bottom: 24px;
    display: block;
}

.hero-left h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 56px;
    font-weight: 500;
    color: #04111D;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 18px;
    color: #707A83;
    margin-bottom: 48px;
    line-height: 1.6;
}

.market-cap {
    margin-top: 60px;
}

.market-cap-label {
    font-size: 16px;
    color: #707A83;
    margin-bottom: 12px;
}

.market-cap-value {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.currency-symbol {
    font-size: 32px;
    color: #04111D;
}

.value {
    font-size: 48px;
    font-weight: 700;
    color: #04111D;
}

.change {
    font-size: 20px;
    font-weight: 500;
    margin-left: 12px;
}

.change.negative {
    color: #EB5757;
}

.change.positive {
    color: #16B364;
}

/* Learn Card */
.learn-card {
    background-color: #FFFFFF;
    border: 1px solid #E5E8EB;
    border-radius: 12px;
    padding: 32px;
    box-shadow: 0px 4px 16px rgba(0, 0, 0, 0.04);
}

.learn-card h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 20px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 24px;
}

.learn-list {
    list-style: none;
    margin-bottom: 32px;
}

.learn-list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 16px;
    color: #353840;
    font-size: 15px;
    line-height: 1.6;
}

.learn-list li:before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 16px;
    height: 16px;
    background-color: #2081E2;
    border-radius: 50%;
}

.signup-btn {
    width: 100%;
    padding: 12px 24px;
    background-color: #2081E2;
    border: none;
    border-radius: 10px;
    color: #FFFFFF;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(32, 129, 226, 0.2);
}

.signup-btn:hover {
    background-color: #1868B7;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(32, 129, 226, 0.3);
}

/* How to Buy Section */
.how-to-buy-section {
    background-color: #FFFFFF;
    padding: 100px 0;
}


.how-to-buy-section h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 48px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 24px;
    letter-spacing: -0.01em;
}

.section-intro {
    font-size: 17px;
    color: #707A83;
    line-height: 1.7;
    margin-bottom: 80px;
}

.instructions-wrapper h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 32px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 48px;
    letter-spacing: -0.01em;
}


.step-cards {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.step-card {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 60px;
    padding: 36px 0;
    border-bottom: 1px solid #E5E8EB;
    align-items: start;
}

.step-card:first-child {
    padding-top: 0;
}

.step-card:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.step-header {
    display: flex;
    align-items: baseline;
    gap: 20px;
}

.step-number {
    font-family: 'Poppins', sans-serif;
    font-size: 24px;
    font-weight: 600;
    color: #2081E2;
    min-width: 30px;
}

.step-header h4 {
    font-family: 'Poppins', sans-serif;
    font-size: 22px;
    font-weight: 500;
    color: #04111D;
    line-height: 1.3;
}

.step-description p {
    font-size: 16px;
    color: #707A83;
    line-height: 1.7;
}

/* Related Guides Section */
.related-guides-section {
    background-color: #FBFCFD;
    padding: 80px 0 100px;
}

.related-guides-section h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 42px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 24px;
}

.section-divider {
    border: none;
    border-top: 1px solid #E5E8EB;
    margin: 0 0 60px 0;
}

.assets-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 48px;
    gap: 40px;
}

.popular-assets h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 32px;
    font-weight: 500;
    color: #04111D;
    margin: 0;
}

.assets-description {
    font-size: 16px;
    color: #707A83;
    line-height: 1.6;
    margin: 0;
    text-align: left;
}

.asset-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.asset-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background-color: #FFFFFF;
    border: 1px solid #E5E8EB;
    border-radius: 12px;
    text-decoration: none;
    color: #04111D;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.2s;
}

.asset-link:hover {
    border-color: #2081E2;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.asset-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

/* CTA Section */
.cta-section {
    background-color: #0D2242;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-content {
    display: grid;
    grid-template-columns: 1fr 500px;
    gap: 80px;
    align-items: center;
}

.cta-left h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 48px;
    font-weight: 500;
    color: #FFFFFF;
    margin-bottom: 40px;
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background-color: #2081E2;
    border: none;
    border-radius: 12px;
    color: #FFFFFF;
    font-size: 18px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(32, 129, 226, 0.2);
}

.cta-button:hover {
    background-color: #1868B7;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(32, 129, 226, 0.3);
}

.cta-image-placeholder {
    width: 100%;
    max-width: 400px;
    height: 300px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    margin-left: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* Custody Section */
.custody-section {
    background-color: #FFFFFF;
    padding: 100px 0;
}

.custody-section h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 48px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 24px;
    letter-spacing: -0.01em;
}

.custody-section .section-intro {
    font-size: 17px;
    color: #707A83;
    line-height: 1.7;
    margin-bottom: 80px;
}

.custody-section .instructions-wrapper h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 32px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 48px;
    letter-spacing: -0.01em;
}

/* Wallet CTA Section */
.wallet-cta-section {
    background-color: #0D2242;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.wallet-cta-content {
    display: grid;
    grid-template-columns: 1fr 500px;
    gap: 80px;
    align-items: center;
}

.wallet-cta-left h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 48px;
    font-weight: 500;
    color: #FFFFFF;
    margin-bottom: 40px;
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.wallet-cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background-color: #2081E2;
    border: none;
    border-radius: 12px;
    color: #FFFFFF;
    font-size: 18px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 4px 12px rgba(32, 129, 226, 0.2);
}

.wallet-cta-button:hover {
    background-color: #1868B7;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(32, 129, 226, 0.3);
}


/* Other Crypto Section */
.other-crypto-section {
    background-color: #FBFCFD;
    padding: 80px 0 100px;
}

.other-crypto-section h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 42px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 24px;
}

.crypto-subsection {
    margin-bottom: 80px;
}

.crypto-subsection:last-child {
    margin-bottom: 0;
}

.crypto-subsection h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 32px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 12px;
}

.subsection-description {
    font-size: 16px;
    color: #707A83;
    margin-bottom: 32px;
}

.subsection-title {
    font-family: 'Poppins', sans-serif;
    font-size: 24px;
    font-weight: 500;
    color: #04111D;
    margin: 32px 0 12px;
}

.crypto-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.crypto-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background-color: #FFFFFF;
    border: 1px solid #E5E8EB;
    border-radius: 12px;
    text-decoration: none;
    color: #04111D;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    line-height: 1.4;
}

.crypto-link:hover {
    border-color: #2081E2;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.crypto-link small {
    font-size: 12px;
    color: #707A83;
    font-weight: 400;
}

.crypto-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

/* Stake Crypto Section */
.stake-crypto-section {
    background-color: #FBFCFD;
    padding: 80px 0 100px;
}

.stake-crypto-section h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 42px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 24px;
}

.stake-crypto-section .crypto-subsection {
    position: relative;
}

.stake-crypto-section h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 32px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 48px;
}

.subsection-description-right {
    position: absolute;
    top: 0;
    right: 0;
    font-size: 16px;
    color: #707A83;
    line-height: 1.6;
    max-width: 400px;
    text-align: right;
}

/* FAQ Section */
.faq-section {
    background-color: #FBFCFD;
    padding: 80px 0 100px;
}

.faq-section h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 42px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 24px;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px 60px;
    margin-top: 60px;
}

.faq-item h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 20px;
    font-weight: 500;
    color: #04111D;
    margin-bottom: 16px;
}

.faq-item p {
    font-size: 16px;
    color: #707A83;
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .learn-card {
        max-width: 500px;
    }
    
    .cta-content {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    
    .cta-image-placeholder {
        margin: 0 auto;
        max-width: 100%;
    }
    
    .cta-left h2 {
        font-size: 36px;
        color: #FFFFFF;
    }
    
    .wallet-cta-content {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    
    
    .wallet-cta-left h2 {
        font-size: 36px;
        color: #FFFFFF;
    }
    
    .crypto-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .subsection-description-right {
        position: static;
        text-align: left;
        max-width: none;
        margin-bottom: 32px;
    }
    
    .asset-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    /* Container adjustments */
    .container {
        padding: 0 32px;
    }
    
    /* Navigation */
    .nav {
        padding: 0 32px;
    }
    
    .nav-center {
        display: none;
    }
    
    .opensea-button {
        font-size: 14px;
        padding: 10px 16px;
    }
    
    /* Hero Section */
    .hero-section {
        padding: 60px 0 80px;
    }
    
    .hero-left h1 {
        font-size: 32px;
        margin-bottom: 16px;
    }
    
    .hero-subtitle {
        font-size: 16px;
        margin-bottom: 32px;
    }
    
    .btc-icon {
        width: 48px;
        height: 48px;
        margin-bottom: 16px;
    }
    
    .market-cap {
        margin-top: 40px;
    }
    
    .value {
        font-size: 32px;
    }
    
    .currency-symbol {
        font-size: 20px;
    }
    
    .learn-card {
        padding: 24px;
    }
    
    /* Step Cards - Critical Fix */
    .step-card {
        display: block;
        padding: 24px 0;
        border-bottom: 1px solid #E5E8EB;
    }
    
    .step-header {
        display: block;
        margin-bottom: 12px;
    }
    
    .step-number {
        font-size: 20px;
        color: #2081E2;
        display: block;
        margin-bottom: 8px;
    }
    
    .step-header h4 {
        font-size: 18px;
        line-height: 1.3;
        margin: 0;
    }
    
    .step-description {
        margin-top: 12px;
    }
    
    .step-description p {
        font-size: 14px;
        line-height: 1.6;
        margin: 0;
    }
    
    /* Section Spacing */
    .how-to-buy-section,
    .custody-section,
    .getting-started-section {
        padding: 60px 0;
    }
    
    .how-to-buy-section h2,
    .custody-section h2,
    .getting-started-section h2 {
        font-size: 32px;
        margin-bottom: 16px;
    }
    
    .section-intro {
        font-size: 15px;
        margin-bottom: 48px;
    }
    
    .instructions-wrapper h3 {
        font-size: 24px;
        margin-bottom: 32px;
    }
    
    /* Related Guides */
    .related-guides-section {
        padding: 60px 0 80px;
    }
    
    .related-guides-section h2 {
        font-size: 32px;
    }
    
    .assets-header {
        flex-direction: column;
        gap: 16px;
        margin-bottom: 32px;
    }
    
    .assets-description {
        text-align: left;
        max-width: none;
    }
    
    .asset-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .asset-link {
        font-size: 13px;
        padding: 12px;
    }
    
    .asset-icon {
        width: 28px;
        height: 28px;
    }
    
    /* CTA Sections */
    .cta-section,
    .wallet-cta-section {
        padding: 60px 0;
    }
    
    .cta-left h2,
    .wallet-cta-left h2 {
        font-size: 28px;
        margin-bottom: 24px;
        color: #FFFFFF;
    }
    
    .cta-button,
    .wallet-cta-button {
        font-size: 16px;
        padding: 14px 24px;
    }
    
    .cta-image-placeholder {
        width: 100%;
        max-width: 300px;
        height: 200px;
    }
    
    
    /* Other Crypto Section */
    .other-crypto-section,
    .stake-crypto-section {
        padding: 60px 0 80px;
    }
    
    .other-crypto-section h2,
    .stake-crypto-section h2 {
        font-size: 28px;
    }
    
    .crypto-subsection {
        position: static;
    }
    
    .crypto-subsection h3 {
        font-size: 24px;
        margin-bottom: 12px;
    }
    
    .subsection-title {
        font-size: 20px;
        margin: 24px 0 8px;
    }
    
    .subsection-description {
        margin-bottom: 24px;
    }
    
    .crypto-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .crypto-link {
        font-size: 14px;
    }
    
    /* FAQ Section */
    .faq-section {
        padding: 60px 0 80px;
    }
    
    .faq-section h2 {
        font-size: 28px;
    }
    
    .faq-grid {
        margin-top: 40px;
    }
    
    .faq-item h3 {
        font-size: 18px;
        margin-bottom: 12px;
    }
    
    .faq-item p {
        font-size: 14px;
    }
}

/* Small Mobile Devices */
@media (max-width: 480px) {
    /* Navigation */
    .logo span {
        font-size: 18px;
    }
    
    /* Hero Section */
    .hero-left h1 {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .value {
        font-size: 28px;
    }
    
    .market-cap-label {
        font-size: 14px;
    }
    
    .change {
        font-size: 16px;
    }
    
    /* Sections */
    .how-to-buy-section h2,
    .custody-section h2,
    .getting-started-section h2,
    .other-crypto-section h2,
    .stake-crypto-section h2,
    .faq-section h2 {
        font-size: 24px;
    }
    
    .instructions-wrapper h3,
    .crypto-subsection h3 {
        font-size: 20px;
    }
    
    /* CTA Sections */
    .cta-left h2,
    .wallet-cta-left h2 {
        font-size: 24px;
        color: #FFFFFF;
    }
    
    /* Asset Grid - Single column on very small screens */
    .asset-grid {
        grid-template-columns: 1fr;
    }
}