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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    color: #ffffff;
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

/* Stars Background */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.star {
    position: absolute;
    width: 2px;
    height: 2px;
    background: #ffffff;
    border-radius: 50%;
    opacity: 0.8;
    animation: twinkle 3s infinite;
    transition: transform 0.3s ease-out;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* Container */
.container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 60px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.brand-text {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(45deg, #00d4ff, #0099cc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    color: #ffffff;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: #00d4ff;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #00d4ff;
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 80px 0;
    margin-bottom: 80px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(45deg, #ffffff, #00d4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: #b0b3b8;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: linear-gradient(45deg, #00d4ff, #0099cc);
    color: #ffffff;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.4);
}

/* Section Titles */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    color: #ffffff;
}

/* Features Section */
.features {
    margin-bottom: 100px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.feature-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #00d4ff;
}

.feature-card p {
    color: #b0b3b8;
    line-height: 1.6;
}

/* Download Section */
.download {
    margin-bottom: 100px;
}

.download-content {
    max-width: 800px;
    margin: 0 auto;
}

.download-button-container {
    text-align: center;
    margin-bottom: 60px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    padding: 20px 50px;
    background: linear-gradient(45deg, #00d4ff, #0099cc);
    color: #ffffff;
    border: none;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.4);
}

.download-icon {
    font-size: 1.5rem;
}

.installation-guide {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px;
}

.installation-guide h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 25px;
    color: #00d4ff;
}

.install-steps {
    list-style: none;
    counter-reset: step-counter;
}

.install-steps li {
    counter-increment: step-counter;
    margin-bottom: 15px;
    padding-left: 40px;
    position: relative;
    color: #e4e6ea;
}

.install-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 25px;
    height: 25px;
    background: linear-gradient(45deg, #00d4ff, #0099cc);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
    color: #ffffff;
}

.install-steps code {
    background: rgba(0, 0, 0, 0.3);
    padding: 2px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: #00d4ff;
}

/* Contact Section */
.contact {
    margin-bottom: 80px;
}

.contact-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-content p {
    font-size: 1.1rem;
    color: #b0b3b8;
    margin-bottom: 30px;
}

.contact-email {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 20px;
    transition: all 0.3s ease;
}

.contact-email:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(0, 212, 255, 0.3);
}

.email-label {
    font-weight: 600;
    color: #ffffff;
}

.email-address {
    color: #00d4ff;
    cursor: pointer;
    font-weight: 500;
    transition: color 0.3s ease;
}

.email-address:hover {
    color: #ffffff;
}

/* Footer */
.footer {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 40px 0;
}

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

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
}

.footer-link {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #b0b3b8;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: #00d4ff;
}

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

.footer-text {
    color: #666;
    font-size: 0.9rem;
}

/* Download Popup */
.download-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.download-popup.show {
    opacity: 1;
    visibility: visible;
}

.download-popup-content {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    padding: 0;
    max-width: 450px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transform: scale(0.8);
    transition: transform 0.3s ease;
}

.download-popup.show .download-popup-content {
    transform: scale(1);
}

.download-popup-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.download-popup-header h3 {
    color: #00d4ff;
    font-size: 1.4rem;
    font-weight: 600;
    margin: 0;
}

.download-popup-close {
    background: none;
    border: none;
    color: #ffffff;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.download-popup-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #00d4ff;
}

.download-popup-body {
    padding: 30px;
}

.download-progress-container {
    text-align: center;
}

.download-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

.download-popup-body p {
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 25px;
}

.download-progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 15px;
}

.download-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #00d4ff, #0099cc);
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 10px;
    position: relative;
}

.download-progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.download-status {
    color: #00d4ff;
    font-weight: 600;
    font-size: 1.1rem;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: rgba(0, 212, 255, 0.95);
    backdrop-filter: blur(10px);
    color: #ffffff;
    padding: 0;
    border-radius: 15px;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
    overflow: hidden;
    min-width: 280px;
}

.toast.show {
    transform: translateX(0);
}

.toast-content {
    padding: 20px;
    position: relative;
}

.toast-message {
    font-weight: 500;
}

.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: #ffffff;
    transition: width 3s linear;
    width: 100%;
}

.toast-progress.animate {
    width: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-links {
        gap: 20px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 15px;
    }
    
    .contact-email {
        flex-direction: column;
        gap: 10px;
    }
    
    .toast {
        right: 20px;
        left: 20px;
        min-width: auto;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}