:root {
    --bg-base: #0a0a0c;
    --bg-surface: #111114;
    --bg-surface-elevated: #1a1a1e;
    --border-color: #27272a;
    --border-highlight: #3f3f46;
    --primary: #ffffff;
    --secondary: #a1a1aa;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-glow: rgba(37, 99, 235, 0.2);
    --font-heading: 'Inter', system-ui, sans-serif;
    --font-body: 'Inter', system-ui, sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container-max: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-base);
    color: var(--primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    min-height: 100vh;
}

.glow-bg {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100vw;
    height: 100vh;
    background: radial-gradient(circle at 50% 0%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 0% 100%, rgba(16, 185, 129, 0.04) 0%, transparent 40%);
    z-index: -1;
    pointer-events: none;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 8rem 0;
}

.text-center {
    text-align: center;
}

.section-heading {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.04em;
}

/* Navbar */
.navbar {
    padding: 1.25rem 0;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(10, 10, 12, 0.8);
}

.nav-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1.5px;
    text-decoration: none;
    color: inherit;
}

.logo .dot {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    font-size: 0.95rem;
    font-weight: 700;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 10px 20px var(--accent-glow);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--border-highlight);
    background-color: rgba(255, 255, 255, 0.03);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
}

/* Hero */
.hero {
    padding: 14rem 0 6rem;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 2.5rem;
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 5.5rem);
    margin-bottom: 2rem;
    background: linear-gradient(to bottom, #ffffff, #a1a1aa);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--secondary);
    margin: 0 auto;
    max-width: 750px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

/* Payment Cards */
.payments-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.payment-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.payment-card:hover {
    border-color: var(--border-highlight);
    transform: translateY(-6px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
}

.payment-icon {
    font-size: 2rem;
    margin-bottom: 1.25rem;
}

.payment-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.payment-header h3 {
    font-size: 1.4rem;
    letter-spacing: -0.03em;
}

.payment-speed {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.35rem 0.75rem;
    border-radius: 100px;
}

.speed-instant {
    background: rgba(16, 185, 129, 0.12);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.speed-fast {
    background: rgba(37, 99, 235, 0.1);
    color: var(--accent);
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.speed-standard {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.payment-desc {
    color: var(--secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.payment-details {
    flex-grow: 1;
    margin-bottom: 1.5rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.6rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    gap: 1rem;
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    color: var(--secondary);
    font-size: 0.85rem;
    font-weight: 500;
    flex-shrink: 0;
}

.detail-value {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    text-align: right;
}

.detail-value.mono {
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.5px;
    color: var(--accent);
}

.warning-row {
    background: rgba(245, 158, 11, 0.06);
    border-radius: 8px;
    padding: 0.6rem 0.75rem !important;
    margin-bottom: 0.25rem;
}

.payment-actions {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.btn-payment {
    display: inline-flex;
    align-items: center;
    padding: 0.6rem 1.2rem;
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: 10px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--accent);
    border: 1px solid rgba(37, 99, 235, 0.2);
    text-decoration: none;
    transition: var(--transition);
}

.btn-payment:hover {
    background: rgba(37, 99, 235, 0.2);
    border-color: rgba(37, 99, 235, 0.4);
    transform: translateY(-2px);
}

/* Requirements Grid */
.requirements-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 4rem;
}

.req-item {
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem 1.5rem;
    text-align: center;
    transition: var(--transition);
}

.req-item:hover {
    border-color: var(--border-highlight);
    transform: translateY(-4px);
}

.req-icon {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.req-item p {
    color: var(--secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.req-item strong {
    color: var(--primary);
}

/* CTA Box */
.cta-box {
    background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-surface-elevated) 100%);
    border: 1px solid var(--border-color);
    border-radius: 48px;
    padding: 6rem;
    text-align: center;
    box-shadow: 0 60px 120px rgba(0, 0, 0, 0.6);
}

.cta-box h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 2rem;
}

.cta-box p {
    font-size: 1.15rem;
    color: var(--secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

/* Footer */
.footer {
    padding: 5rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--secondary);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 1100px) {
    .payments-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .requirements-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .section {
        padding: 5rem 0;
    }

    .hero {
        padding: 10rem 0 4rem;
    }

    .hero h1 {
        font-size: 2.75rem;
    }

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

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

    .payment-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .cta-box {
        padding: 3rem 1.5rem;
        border-radius: 24px;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }

    .nav-links {
        display: none;
    }
}