/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #000000;
    background-color: #ffffff;
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

/* Buttons */
.btn-primary {
    background: white;
    color: #FE8A01;
    border: 3px solid #FE8A01;
    padding: 16px 32px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 12px 35px rgba(255, 255, 255, 0.4);
    background: #FE8A01;
    color: white;
    border-color: #FE8A01;
}

.btn-primary:active {
    transform: translateY(-1px) scale(1.02);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #FE8A01;
    border: 2px solid #e5e5e5;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-secondary:hover {
    border-color: #FE8A01;
    color: #FE8A01;
}

.btn-restart {
    background: #f8f9fa;
    border: 1px solid #e9ecef;
    padding: 10px 20px;
    border-radius: 8px;
    color: #FE8A01;
    cursor: pointer;
    font-weight: 500;
    margin-top: 2rem;
    transition: all 0.3s ease;
}

.btn-restart:hover {
    background: #e9ecef;
    color: #FE8A01;
}

/* Header */
.header {
    background: linear-gradient(145deg, #000000, #ffffff);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

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

.logo {
    height: 40px;
    width: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-item {
    position: relative;
    cursor: pointer;
    font-weight: 500;
    color: white;
    transition: color 0.3s ease;
}

.nav-item:hover {
    color: #FE8A01;
}

.dropdown {
    position: relative;
}

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    padding: 1rem 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
}

.dropdown:hover .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-content a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: #000000;
    text-decoration: none;
    transition: background 0.3s ease;
}

.dropdown-content a:hover {
    background: #f8f9fa;
    color: #FE8A01;
}

.dropdown-content i {
    margin-right: 0.5rem;
    width: 16px;
}

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: white;
    padding: 10px;
    background: transparent;
    border: none;
    outline: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    touch-action: manipulation;
    min-width: 44px;
    min-height: 44px;
    align-items: center;
    justify-content: center;
}

/* Hero Section */
.hero {
    padding: 120px 2rem 80px;
    background: linear-gradient(135deg, #FE8A01 0%, #ff9500 100%);
    color: white;
    display: flex;
    align-items: center;
    min-height: 100vh;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="50" cy="10" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="10" cy="90" r="1" fill="%23ffffff" opacity="0.1"/><circle cx="90" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    pointer-events: none;
}

.hero-content {
    flex: 1;
    max-width: 600px;
    z-index: 2;
    position: relative;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    font-weight: 400;
}

.app-badges {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.app-badge {
    height: 60px;
    width: auto;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.app-badge:hover {
    transform: scale(1.05);
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: linear-gradient(145deg, #3a3a3a, #ffffff);
    border-radius: 30px;
    padding: 15px;
    position: relative;
    box-shadow: 
        0 25px 50px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transform: perspective(1000px) rotateY(-15deg);
    border: 2px solid #FE8A01;
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: #000000;
    border-radius: 2px;
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #ffffff, #e3e3e3);
    border-radius: 30px;
    overflow: hidden;
    position: relative;
}

.app-interface {
    padding: 2rem 1.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.interface-header {
    text-align: center;
    margin-bottom: -7rem;
    margin-top: 6rem;
}

.balance {
    font-size: 2.5rem;
    font-weight: 800;
    color: #FE8A01;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    background: linear-gradient(135deg, #FE8A01, #ff9500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}

.interface-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.buy-btn {
    background: linear-gradient(145deg, #FE8A01, #e77801);
    color: white;
    border: none;
    padding: 16px 48px;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 
        0 8px 20px rgba(254, 138, 1, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.buy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 12px 25px rgba(254, 138, 1, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.buy-btn:active {
    transform: translateY(0);
    box-shadow: 
        0 4px 15px rgba(254, 138, 1, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btc-amount {
    font-size: 1rem;
    color: rgba(0, 0, 0, 0.8);
}

.action-buttons {
    display: flex;
    justify-content: space-around;
    margin-top: 2rem;
}

.action-btn {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    padding: 1rem;
    text-align: center;
    color: white;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    cursor: pointer;
    min-width: 60px;
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.action-btn i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: block;
}

.action-btn span {
    font-size: 0.8rem;
    font-weight: 500;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: #f8f9fa;
}

/* Contact Section */
.contact-section {
    padding: 80px 0;
    background: #f8f9fa;
    position: relative;
    z-index: 1;
}

.contact-section::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -50px;
    height: 50px;
    background: #f8f9fa;
    z-index: 1;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.contact-card {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    text-align: center;
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
    border: 2px solid #f0f0f0;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
    border-color: #FE8A01;
}

.contact-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #FE8A01, #ff9500);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.contact-card h3 {
    margin-bottom: 1rem;
    color: #000000;
}

.contact-card p {
    color: #000000;
    line-height: 1.6;
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
    color: #000000;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    text-align: center;
    text-decoration: none;
    color: inherit;
    display: block;
    cursor: pointer;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.12);
}

.feature-icon {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: #000000;
}

.feature-card p {
    color: #000000;
    line-height: 1.6;
}

/* milestones Section */
.milestones {
    padding: 80px 0;
    background: white;
}

.milestones-header {
    text-align: center;
    margin-bottom: 5rem;
}

.milestones-header h2 {
    color: #000000;
    margin-bottom: 1rem;
}

.milestones-header p {
    color: #000000;
    font-size: 1.1rem;
}

.milestones-steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
    margin: 3rem 0;
    position: relative;
}

.milestones-steps::before {
    content: '';
    position: absolute;
    top: 30px;
    left: 30px;
    right: 30px;
    height: 2px;
    background: linear-gradient(to right, #FE8A01, #ff9500);
    z-index: 1;
}

.step {
    text-align: center;
    flex: 1;
    position: relative;
    z-index: 2;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #e9ecef;
    color: #000000;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.step.active .step-number {
    background: linear-gradient(135deg, #FE8A01, #ff9500);
    color: white;
}

.step-content h4 {
    margin-bottom: 0.5rem;
    color: #000000;
}

.step-content p {
    color: #000000;
    font-size: 0.9rem;
}

/* Bitcoin Card Section */
.exchange-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
    color: white;
}

.exchange-content {
    display: block;
    text-align: center;
}

.exchange-text {
    flex: 1;
}

.exchange-text h2 {
    font-size: 3rem;
    margin-bottom: 3rem;
    color: white;
}

.exchange-subtitle {
    text-align: center;
    margin-bottom: 2rem;
    color: white;
}

.exchange-text h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    opacity: 0.9;
}

.exchange-text h4 {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    font-weight: 600;
    opacity: 0.8;
}

.exchange-visual {
    flex: 1;
    display: flex;
    justify-content: center;
}

.exchange-row {
    display: flex;
    gap: 1rem;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    padding: 1rem;
}

.exchange-visual a {
    display: block;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.exchange-visual a:hover {
    transform: scale(1.05);
}

.crypto-exchange-image {
    width: 250px;
    height: 165px;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    object-fit: cover;
    animation: float 3s ease-in-out infinite;
}

@media (max-width: 768px) {
    .crypto-exchange-image {
        width: 180px;
        height: 120px;
    }
    .exchange-row {
        gap: 1rem;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.card-chip {
    width: 50px;
    height: 35px;
    background: #d4af37;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.card-logo {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: 2rem;
    font-weight: 700;
}

.card-number {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin: 2rem 0 1rem;
}

.card-info {
    display: flex;
    justify-content: space-between;
    align-items: end;
    margin-top: auto;
}

.card-holder {
    font-size: 0.9rem;
    font-weight: 600;
}

.card-expiry {
    font-size: 1rem;
    font-weight: 600;
}

/* Exchange Section */
.exchange {
    padding: 80px 0;
    background: #f8f9fa;
    text-align: center;
}

.exchange h2 {
    margin-bottom: 3rem;
    color: #000000;
}

.exchange-widget {
    max-width: 500px;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.exchange-input,
.exchange-output {
    display: flex;
    align-items: center;
    background: #f8f9fa;
    border-radius: 12px;
    padding: 1rem;
    gap: 1rem;
}

.currency-select {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    min-width: 80px;
}

.currency-flag {
    font-size: 1.5rem;
}

.amount-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 1.1rem;
    font-weight: 600;
    text-align: right;
    outline: none;
}

.exchange-arrow {
    align-self: center;
    background: #FE8A01;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0.5rem 0;
}

/* Testimonials */
.testimonials {
    padding: 80px 0;
    background: white;
}

.testimonials h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: #000000;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

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

.rating {
    color: #ffc107;
    font-size: 1.1rem;
}

.recommendation {
    background: #28a745;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.testimonial-card h4 {
    margin-bottom: 1rem;
    color: #000000;
}

.testimonial-card p {
    color: #000000;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: #000000;
}

.testimonial-author strong {
    background: #FE8A01;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

/* CTA Section */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, #000000, #333333);
    color: white;
    text-align: center;
}

.cta h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cta h2 a {
    color: white;
    text-decoration: none;
    transition: color 0.3s ease;
}

.cta h2 a:hover {
    color: #FE8A01;
}

.cta p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* Footer */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #FE8A01;
}

.footer-apps {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.footer-certifications {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.cert-badge {
    background: #333;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-language select {
    background: #333;
    color: white;
    border: 1px solid #555;
    padding: 0.5rem;
    border-radius: 8px;
}

.footer-legal {
    color: #ccc;
    font-size: 0.8rem;
    line-height: 1.5;
    max-width: 800px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 20px;
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: #ccc;
    transition: color 0.3s ease;
}

.close:hover {
    color: #FE8A01;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.contact-form input,
.contact-form textarea {
    padding: 1rem;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: #FE8A01;
}

.phone-input {
    display: flex;
    gap: 0.5rem;
}

.country-code {
    padding: 1rem;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    min-width: 120px;
}

.phone-input input {
    flex: 1;
}

/* Navigation Menu Styles */
.nav-menu {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-menu .nav-item {
    background: linear-gradient(145deg, #FE8A01, #ff9500);
    color: white;
    padding: 12px 24px;
    border-radius: 20px;
    text-decoration: none;
    text-align: center;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(254, 138, 1, 0.3);
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.nav-menu .nav-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(254, 138, 1, 0.4);
    background: linear-gradient(145deg, #ff9500, #FE8A01);
}

.nav-menu .nav-item:active {
    transform: translateY(0);
    box-shadow: 0 4px 15px rgba(254, 138, 1, 0.3);
}

/* Mobile Menu Styles */
.nav-menu.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    background: white;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    z-index: 999;
    gap: 1.5rem;
}

.nav-menu.mobile-open .nav-item {
    padding: 15px 30px;
    font-size: 1.1rem;
}

.nav-menu.mobile-open .dropdown-content {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: #f8f9fa;
    margin-top: 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu:not(.mobile-open) {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex !important;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 100px 1rem 60px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-visual {
        margin-top: 2rem;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
        transform: none;
    }
    
    .balance {
        font-size: 1.8rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .milestones-steps {
        flex-direction: column;
        gap: 1.5rem;
        align-items: center;
    }
    
    .milestones-steps::before {
        display: none;
    }
    
    .step {
        width: 100%;
        max-width: 300px;
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .step-number {
        margin: 0 auto 1rem;
    }
    
    .card-content {
        flex-direction: column;
        text-align: center;
    }
    
    .crypto-card {
        transform: none;
        width: 100%;
        max-width: 320px;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .app-badges {
        flex-direction: column;
        align-items: center;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .logo {
        height: 36px;
        image-rendering: auto;
        -webkit-font-smoothing: subpixel-antialiased;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .card-text h2 {
        font-size: 2rem;
    }
    
    .cta h2 {
        font-size: 2rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
    
    .modal-content {
        margin: 10% auto;
        padding: 1.5rem;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes floatAnimation {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.feature-card {
    animation: fadeInUp 0.6s ease forwards;
}

.feature-card:nth-child(odd) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(even) {
    animation-delay: 0.2s;
}

.phone-mockup {
    animation: floatAnimation 3s ease-in-out infinite;
}

.crypto-card {
    animation: floatAnimation 4s ease-in-out infinite;
}

/* Smooth scrolling and performance */
.hero,
.features,
.milestones,
.bitcoin-card-section,
.exchange,
.testimonials,
.cta {
    will-change: transform;
}

/* Loading States */
.loading {
    opacity: 0.5;
    pointer-events: none;
}

.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Focus states for accessibility */
button:focus,
a:focus,
input:focus,
textarea:focus,
select:focus {
    outline: 2px solid #FE8A01;
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn-primary {
        background: #000;
        color: #fff;
        border: 2px solid #fff;
    }
    
    .btn-secondary {
        background: #fff;
        color: #000;
        border: 2px solid #000;
    }
}

/* Print styles */
@media print {
    .header,
    .nav,
    .btn-primary,
    .btn-secondary,
    .app-badges,
    .modal {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .hero {
        background: white !important;
        color: black !important;
    }
}