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

:root {
    --primary-color: #ff4444;
    --secondary-color: #1a1a2e;
    --accent-color: #16213e;
    --text-color: #e0e0e0;
    --light-text: #b0b0b0;
    --border-color: #ff4444;
    --success-color: #4ade80;
    --warning-color: #fbbf24;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f0f1e 0%, #1a1a2e 100%);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
}

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

/* Navigation Header */
.navbar {
    background: rgba(26, 26, 46, 0.95);
    border-bottom: 2px solid var(--primary-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-icon {
    font-size: 2rem;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(255, 68, 68, 0.5);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-menu a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

/* Hero Section */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 4rem;
    padding: 6rem 0;
    min-height: 600px;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--primary-color);
    text-shadow: 0 0 30px rgba(255, 68, 68, 0.3);
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--light-text);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 32px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, #ff4444, #ff6b6b);
    color: white;
    box-shadow: 0 6px 20px rgba(255, 68, 68, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(255, 68, 68, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

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

.virus-icon {
    width: 300px;
    height: 300px;
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        filter: drop-shadow(0 0 15px rgba(255, 68, 68, 0.5));
    }
    50% {
        filter: drop-shadow(0 0 30px rgba(255, 68, 68, 0.8));
    }
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: rgba(22, 33, 62, 0.5);
    border-top: 1px solid rgba(255, 68, 68, 0.2);
    border-bottom: 1px solid rgba(255, 68, 68, 0.2);
}

.features h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--primary-color);
}

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

.feature-card {
    background: rgba(26, 26, 46, 0.8);
    border: 1px solid rgba(255, 68, 68, 0.3);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.feature-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 20px rgba(255, 68, 68, 0.3);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.feature-card p {
    color: var(--light-text);
    font-size: 0.95rem;
}

/* About Section */
.about {
    padding: 6rem 0;
}

.about h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    text-align: center;
}

.about p {
    font-size: 1.1rem;
    color: var(--light-text);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* Getting Started Section */
.getting-started {
    padding: 6rem 0;
    background: rgba(22, 33, 62, 0.5);
    border-top: 1px solid rgba(255, 68, 68, 0.2);
}

.getting-started h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--primary-color);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #ff4444, #ff6b6b);
    color: white;
    font-size: 2rem;
    font-weight: 700;
    border-radius: 50%;
    margin-bottom: 1rem;
    box-shadow: 0 6px 20px rgba(255, 68, 68, 0.3);
}

.step h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.step p {
    color: var(--light-text);
}

/* Footer */
.footer {
    background: rgba(15, 15, 30, 0.95);
    border-top: 2px solid var(--primary-color);
    padding: 2rem 0;
    text-align: center;
    color: var(--light-text);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer p {
    flex: 1;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--light-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        padding: 3rem 0;
        min-height: auto;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-visual {
        order: -1;
    }

    .virus-icon {
        width: 200px;
        height: 200px;
    }

    .nav-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .features h2,
    .about h2,
    .getting-started h2 {
        font-size: 2rem;
    }

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

    .footer .container {
        flex-direction: column;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.3rem;
    }

    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
    }

    .hero-content h1 {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 0.9rem;
    }

    .features h2,
    .about h2,
    .getting-started h2 {
        font-size: 1.5rem;
    }
}

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

.hero-content,
.feature-card,
.step {
    animation: fadeInUp 0.8s ease-out;
}