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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
}

/* Header */
header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #6366f1;
}

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

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #6366f1;
}

/* Main Content */
main {
    margin-top: 80px;
}

section {
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Hero Section */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    min-height: 70vh;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #6b7280;
}

.cta-button {
    background: #6366f1;
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
}

.cta-button:hover {
    background: #4f46e5;
}

.device-placeholder {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.device-body {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    position: relative;
}

.device-screen {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    background: #1a1a1a;
    border-radius: 12px;
    border: 2px solid #333;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.device-screen::after {
    content: "😊";
}

/* Features Section */
.features {
    background: #f9fafb;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1f2937;
}

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

.feature {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

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

.feature h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

/* How It Works */
.how-it-works h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1f2937;
}

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

.step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: #6366f1;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

.step h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

/* Pricing Section */
.pricing {
    background: #f9fafb;
    text-align: center;
}

.pricing h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #1f2937;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    position: relative;
}

.pricing-card.featured {
    border: 2px solid #6366f1;
    transform: scale(1.05);
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.price {
    font-size: 2.5rem;
    font-weight: bold;
    color: #6366f1;
    margin-bottom: 2rem;
}

.price span {
    font-size: 1rem;
    color: #6b7280;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-card li {
    padding: 0.75rem 0;
    border-bottom: 1px solid #e5e7eb;
}

.pricing-card li:last-child {
    border-bottom: none;
}

.cta-button.secondary {
    background: #6b7280;
}

.cta-button.secondary:hover {
    background: #4b5563;
}

/* Footer */
footer {
    background: #1f2937;
    color: white;
    padding: 3rem 5% 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: #6366f1;
}

.footer-bottom {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* 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);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    position: relative;
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    cursor: pointer;
    color: #6b7280;
}

.close:hover {
    color: #374151;
}

.modal-content h2 {
    margin-bottom: 1.5rem;
    color: #1f2937;
}

.modal-content form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.modal-content input,
.modal-content select,
.modal-content textarea {
    padding: 0.75rem;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 1rem;
}

.modal-content textarea {
    min-height: 80px;
    resize: vertical;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .nav-links {
        display: none;
    }
    
    section {
        padding: 2rem 5%;
    }
}