/* =========================
   Base Styles
========================= */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #ffffff;
    color: #18202a;
    line-height: 1.7;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: min(1120px, 92%);
    margin: 0 auto;
}


/* =========================
   Header
========================= */

.site-header {
    background: #ffffff;
    border-bottom: 1px solid #e7eaf0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.navigation {
    display: flex;
    align-items: center;
    gap: 26px;
}

.navigation a {
    color: #4d5663;
    font-size: 15px;
    font-weight: 600;
    transition: 0.2s ease;
}

.navigation a:hover {
    color: #111820;
}

.header-button {
    padding: 11px 20px;
    border-radius: 8px;
    background: #18202a;
    color: #ffffff;
    font-weight: 700;
    font-size: 14px;
}


/* =========================
   Hero
========================= */

.hero {
    padding: 100px 0;
    background: #f5f7fa;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.3fr 0.7fr;
    align-items: center;
    gap: 70px;
}

.eyebrow,
.section-label {
    display: inline-block;
    margin-bottom: 14px;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.hero h1 {
    font-size: clamp(44px, 7vw, 76px);
    line-height: 1.05;
    letter-spacing: -3px;
    margin-bottom: 25px;
}

.hero-text > p {
    max-width: 620px;
    font-size: 20px;
    color: #5d6672;
}

.hero-actions {
    display: flex;
    gap: 14px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.primary-button,
.secondary-button {
    display: inline-block;
    padding: 13px 22px;
    border-radius: 8px;
    font-weight: 700;
    font-size: 15px;
}

.primary-button {
    background: #18202a;
    color: #ffffff;
}

.secondary-button {
    border: 1px solid #d7dce2;
    background: #ffffff;
}

.hero-card {
    background: #ffffff;
    padding: 42px 35px;
    border: 1px solid #e4e8ed;
    border-radius: 18px;
    box-shadow: 0 18px 50px rgba(24, 32, 42, 0.08);
}

.wallet-icon {
    width: 62px;
    height: 62px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: #18202a;
    color: #ffffff;
    font-size: 27px;
    font-weight: 800;
    margin-bottom: 25px;
}

.hero-card h2 {
    margin-bottom: 10px;
    font-size: 25px;
}

.hero-card p {
    color: #68717d;
}


/* =========================
   Article Sections
========================= */

.article-section {
    padding: 90px 0;
}

.article-container {
    max-width: 820px;
}

.section-label {
    color: #69727e;
}

.article-section h2,
.security-section h2,
.section-heading h2 {
    font-size: clamp(30px, 5vw, 44px);
    line-height: 1.15;
    letter-spacing: -1.5px;
    margin-bottom: 24px;
}

.article-section p {
    margin-bottom: 18px;
    color: #5d6672;
    font-size: 17px;
}


/* =========================
   Features
========================= */

.features-section {
    padding: 90px 0;
    background: #f5f7fa;
}

.section-heading {
    max-width: 700px;
    margin-bottom: 45px;
}

.section-heading p {
    color: #68717d;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.feature-card {
    padding: 32px;
    background: #ffffff;
    border: 1px solid #e4e8ed;
    border-radius: 14px;
}

.feature-number {
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 28px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

.feature-card p {
    color: #69727e;
}


/* =========================
   Security
========================= */

.security-section {
    padding: 90px 0;
}

.security-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: center;
}

.security-content p {
    color: #5d6672;
    font-size: 17px;
}

.security-list {
    list-style: none;
    border-top: 1px solid #e2e6eb;
}

.security-list li {
    padding: 17px 0;
    border-bottom: 1px solid #e2e6eb;
    font-weight: 600;
}


/* =========================
   FAQ
========================= */

.faq-section {
    padding: 90px 0;
    background: #f5f7fa;
}

.faq-list {
    max-width: 820px;
}

.faq-list details {
    background: #ffffff;
    border: 1px solid #e0e5eb;
    margin-bottom: 12px;
    border-radius: 10px;
    padding: 0 22px;
}

.faq-list summary {
    cursor: pointer;
    padding: 20px 0;
    font-weight: 700;
}

.faq-list p {
    color: #626c78;
    padding: 0 0 20px;
}


/* =========================
   Footer
========================= */

.site-footer {
    background: #151b22;
    color: #ffffff;
}

.footer-content {
    padding: 60px 0;
    display: flex;
    justify-content: space-between;
    gap: 50px;
}

.footer-brand {
    max-width: 420px;
}

.footer-brand h3 {
    font-size: 23px;
    margin-bottom: 12px;
}

.footer-brand p {
    color: #aeb6c0;
}

.footer-links {
    display: flex;
    gap: 22px;
    flex-wrap: wrap;
    align-content: flex-start;
}

.footer-links a {
    color: #c7cdd4;
    font-size: 14px;
}

.footer-links a:hover {
    color: #ffffff;
}

.footer-bottom {
    border-top: 1px solid #303740;
}

.footer-bottom p {
    padding: 20px 0;
    color: #929ba6;
    font-size: 13px;
}


/* =========================
   Responsive Design
========================= */

@media (max-width: 850px) {

    .navigation {
        display: none;
    }

    .hero {
        padding: 70px 0;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .security-content {
        grid-template-columns: 1fr;
        gap: 35px;
    }

    .footer-content {
        flex-direction: column;
    }
}


@media (max-width: 520px) {

    .header-button {
        display: none;
    }

    .hero h1 {
        letter-spacing: -2px;
    }

    .hero-text > p {
        font-size: 17px;
    }

    .article-section,
    .features-section,
    .security-section,
    .faq-section {
        padding: 65px 0;
    }

    .hero-card {
        padding: 30px 25px;
    }

    .footer-links {
        gap: 14px;
    }
}