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

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

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e7eb;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: #6366f1;
    font-weight: 700;
    font-size: 24px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: #6b7280;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* Buttons */
.btn-primary, .btn-secondary, .btn-login, .btn-signup {
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 14px;
}

.btn-primary {
    background: #6366f1;
    color: white;
}

.btn-primary:hover {
    background: #5856eb;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: #6366f1;
    border: 2px solid #6366f1;
}

.btn-secondary:hover {
    background: #6366f1;
    color: white;
}

.btn-login {
    background: transparent;
    color: #6b7280;
    border: 1px solid #d1d5db;
}

.btn-login:hover {
    background: #f9fafb;
}

.btn-signup {
    background: #6366f1;
    color: white;
}

.btn-signup:hover {
    background: #5856eb;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 20px;
    opacity: 0.9;
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.hero-buttons .btn-primary {
    background: white;
    color: #6366f1;
}

.hero-buttons .btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

/* Demo Screen */
.demo-screen {
    background: white;
    border-radius: 12px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
}

.demo-header {
    background: #f3f4f6;
    padding: 12px 20px;
    display: flex;
    align-items: center;
}

.demo-dots {
    display: flex;
    gap: 8px;
}

.demo-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #d1d5db;
}

.demo-dots span:first-child { background: #ef4444; }
.demo-dots span:nth-child(2) { background: #f59e0b; }
.demo-dots span:nth-child(3) { background: #10b981; }

.demo-content {
    padding: 30px;
    height: 300px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.chat-bubble {
    padding: 12px 16px;
    border-radius: 18px;
    max-width: 80%;
    animation: fadeInUp 0.6s ease forwards;
}

.chat-bubble.ai {
    background: #f3f4f6;
    color: #374151;
    align-self: flex-start;
}

.chat-bubble.user {
    background: #6366f1;
    color: white;
    align-self: flex-end;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: #f9fafb;
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 60px;
    color: #111827;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #111827;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* How it Works */
.how-it-works {
    padding: 100px 0;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.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: 24px;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #111827;
}

.step p {
    color: #6b7280;
    line-height: 1.6;
}

/* Extension Section */
.extension {
    padding: 100px 0;
    background: #f9fafb;
}

.extension-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.extension-text h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #111827;
}

.extension-text p {
    font-size: 18px;
    color: #6b7280;
    margin-bottom: 30px;
    line-height: 1.6;
}

.extension-features {
    list-style: none;
    margin-bottom: 40px;
}

.extension-features li {
    padding: 8px 0;
    color: #374151;
    font-weight: 500;
}

/* Browser Mockup */
.browser-mockup {
    background: white;
    border-radius: 12px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    overflow: hidden;
}

.browser-header {
    background: #f3f4f6;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.browser-dots {
    display: flex;
    gap: 8px;
}

.browser-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #d1d5db;
}

.browser-url {
    background: white;
    padding: 6px 12px;
    border-radius: 6px;
    color: #6b7280;
    font-size: 14px;
    flex: 1;
}

.browser-content {
    height: 300px;
    background: #f9fafb;
    position: relative;
}

.floating-chat {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 280px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    overflow: hidden;
}

.chat-header {
    background: #6366f1;
    color: white;
    padding: 12px 16px;
    font-weight: 600;
    font-size: 14px;
}

.chat-messages {
    padding: 16px;
}

.message {
    background: #f3f4f6;
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 14px;
    color: #374151;
}

/* Footer */
.footer {
    background: #111827;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3, .footer-section h4 {
    margin-bottom: 20px;
    color: white;
}

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

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #6366f1;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 20px;
    text-align: center;
    color: #9ca3af;
}

/* Modals */
.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: 40px;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: modalSlideIn 0.3s ease;
}

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

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    color: #9ca3af;
    transition: color 0.3s ease;
}

.close:hover {
    color: #374151;
}

.auth-form h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #111827;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #374151;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #6366f1;
}

.full-width {
    width: 100%;
    margin-top: 10px;
}

.auth-switch {
    text-align: center;
    margin-top: 20px;
    color: #6b7280;
}

.auth-switch a {
    color: #6366f1;
    text-decoration: none;
    font-weight: 500;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .extension-content {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        grid-template-columns: 1fr;
    }
}