:root {
    --primary-color: #4340df;
    --text-main: #1a1a1a;
    --text-muted: #777777;
    --text-dark: #222222;
    --bg-light: #ffffff;
    --bg-light-gray: #f5f5f7;
    --bg-dark: #111111;
    --footer-text-light: #ffffff;
    --footer-text-muted: #aaaaaa;
    
    --container-width: 1440px;
    --padding-x: 100px;
    --padding-y-section: 160px;
}

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

body {
    font-family: 'SF UI Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-main);
    line-height: 1.5;
    background-color: var(--bg-light);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6, 
.section-headline, 
.section-label, 
.hero-title, 
.intro-title,
.model-name {
    font-family: 'SF UI Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body.nav-open {
    overflow: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    user-select: none;
    -webkit-user-select: none;
    pointer-events: none; /* Often helpful for purely decorative images to avoid dragging */
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s ease;
}

.text-center { text-align: center; }
.text-primary { color: var(--primary-color); }
.bg-light-gray { background-color: var(--bg-light-gray); }
.bg-dark { background-color: var(--bg-dark); }

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--padding-x);
}

/* --- Top Navigation --- */
.top-nav {
    position: absolute;
    top: 41px;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.top-nav::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    z-index: 1001;
    transition: background 0.2s ease, backdrop-filter 0.2s ease;
}

.top-nav.fixed-nav { position: fixed; top: 0; }
.top-nav.fixed-nav::before {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

body.nav-open .top-nav::before {
    background: var(--bg-light);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}
body.nav-open .top-nav.fixed-nav::before {
    border-bottom-color: transparent;
}

.top-nav.nav-hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 24px var(--padding-x);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1002;
}

.logo img {
    height: 40px;
}

.desktop-nav {
    display: flex;
    gap: 56px;
    flex: 1;
    margin-left: 142px;
    justify-content: flex-start;
}

.nav-link {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-main);
    padding: 0;
}

.nav-link:hover { opacity: 0.8; }
.nav-link:active { opacity: 0.6; }

.header-actions {
    display: flex;
    align-items: center;
}

.btn-buy {
    background-color: var(--text-main);
    color: #fff;
    border-radius: 9999px;
    font-size: 17px;
    font-weight: 600;
    transition: opacity 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 115px;
    height: 44px;
    padding: 0;
}
.btn-buy:hover { opacity: 0.8; }

.mobile-only { display: none; }

.mobile-menu-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    display: none;
    z-index: 1001;
}
.mobile-menu-btn svg {
    display: block;
    fill: var(--text-main);
}
.mobile-menu-btn .line {
    transform-origin: center;
    transform-box: fill-box;
}
.nav-open .mobile-menu-btn .top {
    transform: translate(0, 6px) rotate(45deg);
}
.nav-open .mobile-menu-btn .middle {
    opacity: 0;
}
.nav-open .mobile-menu-btn .bottom {
    transform: translate(0, -6px) rotate(-45deg);
}

/* Mobile Drawer */
.mobile-drawer {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    height: calc(100vh - 64px);
    overflow-y: auto;
    background: var(--bg-light);
    padding: 10px 30px 60px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    gap: 0;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s, visibility 0.4s;
    z-index: 999;
}

.nav-open .mobile-drawer {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: flex-start;
}

.mobile-nav-links .nav-link {
    font-size: 36px;
    font-weight: 700;
    padding: 0;
    text-align: left;
    border-bottom: none;
    line-height: 1;
}

.mobile-header-actions {
    display: flex;
    justify-content: flex-start;
    margin-top: 44px;
}

.mobile-header-actions .btn-buy {
    width: 160px;
    height: 61px;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    font-size: 24px;
    font-weight: 600;
}

/* --- Typography Utilities --- */
.section-label {
    font-size: 28px;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 8px;
}

.section-headline {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-description {
    font-size: 18px;
    color: var(--text-muted);
    margin-bottom: 40px;
    line-height: 28px;
}

/* --- Split Sections (Generic) --- */
.split-section {
    padding: var(--padding-y-section) var(--padding-x);
    display: flex;
    align-items: center;
    gap: 80px;
}
.split-section .section-text {
    flex: 1;
}
.split-section .section-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

/* --- Hero Section --- */
.hero-section {
    padding-top: 135px;
    padding-bottom: 143px;
    background: linear-gradient(180deg, #eaeaec 0%, rgba(232,232,234,0) 100%);
}
.hero-container {
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 20px;
    padding: 0 200px 0 180px;
}
.hero-content {
    flex: 1;
    padding-top: 121px;
}
.hero-title {
    font-size: 56px;
    font-weight: 600;
    line-height: 64px;
    margin-bottom: 40px;
    color: #1a1a1a;
}
.hero-divider {
    width: 120px;
    height: 1px;
    background-color: #1a1a1a;
    margin-bottom: 40px;
    opacity: 0.2;
}
.hero-subtitle {
    font-size: 20px;
    color: var(--text-muted);
    line-height: 30px;
    max-width: 303px;
}
.hero-image {
    flex: 0 0 auto;
    display: flex;
    justify-content: center;
}
.hero-image img {
    width: 560px;
    max-width: none;
}

/* --- Intro Section --- */
.intro-section {
    padding-top: 3px;
    padding-bottom: 40px; /* Together with security-section's 160px top padding, total gap is 200px */
    text-align: center;
    max-width: 978px;
    margin: 0 auto;
}
.intro-title {
    font-size: 60px;
    font-weight: 700;
    margin-bottom: 20px;
}
.intro-text {
    font-size: 24px;
    color: var(--text-main);
    font-weight: 400;
    line-height: 38px;
    letter-spacing: 0.5px;
}
.intro-text strong {
    font-weight: 600;
}

/* --- Security Section --- */
.security-section {
    align-items: flex-start;
}
.security-cards {
    flex: 1.2;
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.security-cards-row {
    display: flex;
    gap: 24px;
}
.sec-card {
    background-color: var(--bg-light-gray);
    padding: 32px;
    border-radius: 12px;
    flex: 1;
}
.sec-card.full-width {
    width: 100%;
}
.sec-card img {
    width: 32px;
    height: 32px;
    margin-bottom: 20px;
}
.sec-card h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.sec-card p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}
.quorum-badge {
    background: var(--primary-color);
    color: white;
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 600;
}

/* --- Models Section --- */
.models-section {
    padding: var(--padding-y-section) 0;
}
.models-grid {
    display: flex;
    justify-content: center;
    gap: 58px;
    margin-top: 60px;
    margin-bottom: 40px;
}
.model-card {
    background: #fff;
    border-radius: 20px;
    padding: 80px 40px 86px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 10px 40px rgba(0,0,0,0.03);
}
.model-card.classic-card {
    flex: 460;
    max-width: 460px;
}
.model-card.quorum-card {
    flex: 580;
    max-width: 580px;
}
.model-card-inner {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.model-card picture {
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 33px;
    width: 100%;
}
.model-card picture img {
    height: auto;
    margin-bottom: 0;
}

@media (min-width: 1025px) {
    .model-card.classic-card picture img {
        width: 73.91%;
        max-width: none;
    }
    .model-card.quorum-card picture img {
        width: 81.72%;
        max-width: none;
    }
}
.model-name {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 30px;
    color: #1a1a1a;
}
.model-subtitle {
    font-size: 18px;
    font-weight: 400;
    margin-bottom: 16px;
    color: #1a1a1a;
}
.model-desc {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-muted);
    text-align: center;
    margin-top: 16px;
    line-height: 21px;
}
.model-card .badge {
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 400;
}
.models-footnotes {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-muted);
    text-align: left;
    max-width: 1040px;
    margin: 0 auto;
    line-height: 21px;
}
.models-footnotes p {
    margin-bottom: 4px;
}

/* --- App Section --- */
.app-section {
    padding: 120px var(--padding-x) 40px;
}
.app-box {
    display: flex;
    align-items: center;
    border-radius: 24px;
    padding: 60px;
    gap: 60px;
    overflow: hidden;
}
.app-box .section-image {
    align-self: flex-end;
    margin-bottom: -60px;
    display: flex;
}
.app-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}
.app-buttons img {
    height: 44px;
}

/* --- Business Section --- */
.business-section {
    padding-top: 160px;
    padding-bottom: 0px;
    align-items: flex-start;
}
.business-section .section-image {
    margin-top: 30px;
}
.btn-outline {
    display: inline-block;
    color: var(--primary-color);
    font-size: 20px;
    font-weight: 600;
    padding: 12px 32px;
    border: 1px solid var(--primary-color);
    border-radius: 30px;
    transition: all 0.2s;
}
.btn-outline:hover {
    background-color: var(--primary-color);
    color: #fff;
}

.business-section .section-image img {
    width: 362px;
    height: auto;
}

/* --- Gift Card Section --- */
.giftcard-section {
    padding: 182px var(--padding-x) var(--padding-y-section);
}
.center-block {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.giftcard-header {
    text-align: center;
}
.giftcard-header h2:first-child {
    font-size: 60px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}
.giftcard-header h2:last-of-type {
    font-size: 48px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 16px;
}
.giftcard-hero-img {
    margin: 80px auto 120px;
    display: flex;
    justify-content: center;
}
.giftcard-hero-img img {
    max-width: 800px;
    width: 100%;
}
.giftcard-features {
    display: flex;
    gap: 60px;
}
.gc-feature {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.gc-image-box {
    width: 100%;
    background-color: var(--bg-light-gray);
    border-radius: 20px;
    overflow: hidden;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.gc-image-box img {
    width: 100%;
    height: auto;
    display: block;
}
.gc-feature h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #222222;
    padding: 0 14px;
}
.gc-feature p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 21px;
    padding: 0 14px;
}

/* --- Footer --- */
.footer {
    padding: 80px 0 40px;
}
.footer-container {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    margin-bottom: 60px;
}
.footer-logo {
    height: 32px;
}
.footer-links-grid {
    display: flex;
    gap: 80px;
}
.footer-col {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.footer-col-title {
    color: var(--text-muted);
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 8px;
}
.footer-link {
    color: var(--footer-text-light);
    font-size: 18px;
    font-weight: 400;
}
.footer-link:hover { opacity: 0.8; }
.app-col a img {
    width: 120px;
    height: auto;
}

.footer-bottom {
    position: relative;
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--footer-text-muted);
}
.footer-bottom::before {
    content: '';
    position: absolute;
    top: 0;
    left: var(--padding-x);
    right: var(--padding-x);
    height: 1px;
    background-color: rgba(255,255,255,0.1);
}
.footer-bottom-links {
    display: flex;
    gap: 30px;
}
.footer-bottom-link {
    font-size: 16px;
    font-weight: 400;
}
.footer-bottom-link:hover { color: #fff; }
.copyright {
    font-size: 16px;
    font-weight: 400;
}

/* --- Responsive (Mobile) --- */
@media (max-width: 1024px) {
    .split-section, .app-box, .security-cards-row, .giftcard-features, .footer-container {
        flex-direction: column;
    }
    .footer-links-grid {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 40px;
    }
    .footer-col {
        flex: 1;
        min-width: 120px;
    }
    .app-col {
        width: 100%;
        flex: none;
    }
    .app-box .section-image {
            align-self: center;
        }

    :root {
        --padding-y-section: 60px;
        --padding-x: 30px;
    }
    
    .desktop-only { display: none !important; }
    .mobile-only { display: block !important; }
    
    .top-nav {
        top: 0;
        width: 100%;
        max-width: 100vw;
    }
    
    .nav-container {
        height: auto;
        padding: 26px 30px;
    }
    
    .logo img {
        height: 28px;
    }
    
    .section-headline { font-size: 32px; }
    .section-label { font-size: 18px; margin-bottom: 6px; }
    .hero-title { font-size: 36px; line-height: 40px; margin-bottom: 20px; }
    .hero-subtitle { font-size: 14px; line-height: 20px; max-width: 197px; }
    .intro-title { font-size: 36px; }
    .intro-text { font-size: 16px; line-height: 24px; }
    .intro-section { text-align: left; }
    .hero-section { padding-top: 124px; padding-bottom: 100px; }
    
    .hero-container {
        flex-direction: column-reverse;
        align-items: flex-start;
        text-align: left;
        gap: 30px;
        padding: 0 var(--padding-x);
    }
    .hero-divider {
        margin: 0 0 20px 0;
    }
    .hero-content {
        padding-top: 0;
    }
    .hero-image {
        margin-left: -10px;
        margin-right: -10px;
        width: calc(100% + 20px);
    }
    .hero-image img {
        width: 100%;
        max-width: 100%;
    }
    
    .models-section {
        padding-top: 100px;
        padding-bottom: 80px;
    }
    
    .app-section {
        padding: 0;
    }
    .split-section { gap: 40px; }
        .app-box { padding: 60px var(--padding-x) 0; gap: 40px; border-radius: 0; }
        .app-box .section-image {
            margin-bottom: 0; /* Usually mobile app image touches the bottom or is constrained */
            display: flex;
            justify-content: center;
        }
    
    .models-grid {
        flex-direction: column;
        align-items: center;
        margin-left: -15px;
        margin-right: -15px;
        margin-top: 40px;
    }
    .model-card.classic-card,
    .model-card.quorum-card {
        flex: none;
        width: 100%;
        max-width: 420px;
        padding: 80px 0 70px;
    }
    .model-card picture {
        margin-bottom: 20px;
    }
    .model-card picture img {
        width: 100%;
        max-width: 100%;
    }
    .model-name {
        font-size: 24px;
        margin-bottom: 40px;
    }
    .model-subtitle {
        font-size: 16px;
    }
    .model-desc {
        padding: 0 30px;
    }
    
    .business-section {
        padding-bottom: 80px; /* Guessing to keep structure, or remove if not needed */
    }
    .business-section .section-image {
        margin-top: -30px;
    }
    
    .giftcard-section {
        padding-top: 180px;
        padding-bottom: 100px;
    }
    
    .giftcard-header {
        text-align: left;
    }
    .giftcard-header h2:first-child {
        font-size: 36px;
    }
    .giftcard-header h2:last-of-type {
        font-size: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
    }

        .giftcard-hero-img {
            width: 100vw;
            margin-left: calc(-50vw + 50%);
            overflow: hidden;
            display: block;
        }
        .giftcard-hero-img img {
            width: 150%;
            max-width: none;
            position: relative;
            left: 50%;
            transform: translateX(-50%);
        }
}