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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #063480 0%, #101724 100%);
    color: #fff;
    overflow-x: hidden;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(6, 52, 128, 0.3);
    z-index: 100;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
}

.logo span {
    color: #00b894;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #00b894;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 120px 80px 80px;
    gap: 60px;
}

.hero-content {
    flex: 1;
    max-width: 560px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 6px 16px;
    margin-bottom: 24px;
    font-size: 14px;
}

.usdt-icon {
    width: 20px;
    height: 20px;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
}

.highlight {
    color: #00b894;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 32px;
}

.hero-rates {
    display: flex;
    gap: 24px;
    margin-bottom: 40px;
}

.rate-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.rate-item .arrow {
    font-size: 24px;
}

.rate-sell .rate-value {
    color: #00b894;
    font-size: 18px;
}

.rate-label {
    display: block;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

.cta-button {
    display: inline-block;
    background: #00b894;
    color: #fff;
    padding: 14px 36px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: transform 0.2s, box-shadow 0.2s;
    margin-right: 16px;
}

.hero-download {
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 14px;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 184, 148, 0.3);
}

/* Phone Mockup */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
}

.phone-mockup {
    width: 280px;
    background: #fff;
    border-radius: 24px;
    padding: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.phone-screen {
    color: #1a1a1a;
}

.mock-header {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.mock-pair {
    font-size: 13px;
    color: #5f6368;
    margin-bottom: 12px;
    padding: 6px 10px;
    background: #f5f6f8;
    border-radius: 6px;
}

.mock-chart {
    height: 60px;
    background: linear-gradient(90deg, #e8f5e9 0%, #c8e6c9 50%, #a5d6a7 100%);
    border-radius: 8px;
    margin-bottom: 16px;
}

.mock-order {
    background: #f5f6f8;
    border-radius: 12px;
    padding: 14px;
}

.mock-order-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.buy-tag {
    background: #00b894;
    color: #fff;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.mock-order-row strong {
    font-size: 16px;
}

.mock-order-detail {
    font-size: 12px;
    color: #5f6368;
    margin-bottom: 4px;
}

.mock-buy-btn {
    display: block;
    width: 100%;
    margin-top: 12px;
    background: #2979ff;
    color: #fff;
    border: none;
    padding: 10px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
}

/* Features */
.features {
    padding: 100px 80px;
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 60px;
}

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

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    transition: transform 0.3s, background 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.08);
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

/* Why Us */
.why-us {
    padding: 100px 80px;
    background: rgba(0, 0, 0, 0.15);
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.why-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.why-number {
    font-size: 32px;
    font-weight: 800;
    color: #00b894;
    opacity: 0.6;
    min-width: 50px;
}

.why-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

.why-item p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.6;
}

/* Download */
.download {
    padding: 100px 80px;
    text-align: center;
}

.download h2 {
    font-size: 36px;
    margin-bottom: 16px;
}

.download p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 40px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: #2979ff;
    color: #fff;
    padding: 16px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 16px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(41, 121, 255, 0.3);
}

/* Footer */
footer {
    padding: 30px 80px;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* Responsive */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        padding: 100px 24px 60px;
        text-align: center;
    }
    .hero h1 { font-size: 32px; }
    .hero-rates { justify-content: center; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .why-grid { grid-template-columns: 1fr; }
    .features, .why-us, .download { padding: 60px 24px; }
    header { padding: 16px 20px; }
    .nav-links { gap: 16px; }
}

@media (max-width: 480px) {
    .features-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 28px; }
}

/* Fade-in animation */
.fade-in {
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.hidden {
    opacity: 0;
    transform: translateY(20px);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}