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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f8fafc;
    color: #333;
    line-height: 1.6;
}

/* Navigation */
.main-nav {
    background: #2c3e50;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.nav-logo h1 {
    color: white;
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: #ecf0f1;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.3s;
}

.nav-link:hover {
    background: #34495e;
}

.nav-link.active {
    background: #3498db;
    color: white;
}

.auth-buttons {
    display: flex;
    gap: 1rem;
    margin-left: 1rem;
}

.btn-login, .btn-signup {
    padding: 0.5rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-login {
    color: white;
    border: 2px solid white;
}

.btn-login:hover {
    background: white;
    color: #2c3e50;
}

.btn-signup {
    background: #3498db;
    color: white;
    border: 2px solid #3498db;
}

.btn-signup:hover {
    background: #2980b9;
    border-color: #2980b9;
}

/* Hero Section */
.hero {
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #f0f4ff 0%, #fdf2f8 100%);
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.1rem;
    color: #7f8c8d;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn-primary, .btn-secondary {
    padding: 0.8rem 2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    transition: all 0.3s;
}

.btn-primary {
    background: #3498db;
    color: white;
    border: 2px solid #3498db;
}

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #3498db;
    border: 2px solid #3498db;
}

.btn-secondary:hover {
    background: #3498db;
    color: white;
}

.btn-large {
    padding: 1rem 3rem;
    font-size: 1.1rem;
}

/* Preview Box */
.preview-box {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border: 1px solid #e0e6ed;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #e0e6ed;
}

.dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #10b981; }

.preview-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.preview-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f8fafc;
    border-radius: 8px;
    transition: transform 0.3s;
}

.preview-item:hover {
    transform: translateX(5px);
    background: #f1f8ff;
}

.preview-item i {
    font-size: 1.5rem;
    color: #3498db;
    background: white;
    padding: 0.8rem;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.preview-item h4 {
    color: #2c3e50;
    margin-bottom: 0.25rem;
}

.preview-item p {
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* Features Section */
.features {
    padding: 4rem 2rem;
    background: white;
}

.section-title {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.section-title h2 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.section-title p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

.features-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #e0e6ed;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    border-color: #3498db;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1), rgba(41, 128, 185, 0.1));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    color: #3498db;
}

.feature-card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-card p {
    color: #7f8c8d;
    line-height: 1.6;
}

/* Benefits Section */
.benefits {
    padding: 4rem 2rem;
    background: #f8fafc;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.benefits h2 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 2rem;
}

.benefits-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.benefit-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.benefit-item i {
    color: #10b981;
    font-size: 1.2rem;
    margin-top: 0.2rem;
}

.benefit-item h4 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.benefit-item p {
    color: #7f8c8d;
}

.benefits-stats {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: #3498db;
    margin-bottom: 0.5rem;
}

.stat-text {
    color: #7f8c8d;
    font-weight: 500;
}

/* CTA Section */
.cta {
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    text-align: center;
}

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

.cta h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.cta-features span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.9;
}

.cta-features i {
    color: #2ecc71;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 2rem 1rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3, .footer-section h4 {
    margin-bottom: 1.5rem;
    color: white;
}

.footer-section a {
    display: block;
    color: #bdc3c7;
    text-decoration: none;
    margin-bottom: 0.8rem;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

/* Responsive */

/* Responsive for tablets */
@media (min-width: 769px) and (max-width: 1024px) {
    .nav-container {
        padding: 0 1.5rem;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .preview-items {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .benefits {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1.5rem;
    }

    .cta-features {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Responsive for large desktops */
@media (min-width: 1201px) {
    .hero-content {
        grid-template-columns: 2fr 3fr;
    }

    .benefits {
        grid-template-columns: 3fr 2fr;
        gap: 4rem;
    }

    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Extra small devices (phones < 480px) */
@media (max-width: 480px) {
    .hero-text h2 {
        font-size: 1.8rem;
    }

    .hero-text p {
        font-size: 1rem;
    }

    .btn-primary, .btn-secondary {
        padding: 0.6rem 1.5rem;
        font-size: 0.9rem;
    }

    .preview-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .preview-item i {
        margin-bottom: 0.5rem;
    }

    .cta h2 {
        font-size: 1.6rem;
    }

    .cta p {
        font-size: 1rem;
    }

    .cta-features {
        gap: 0.5rem;
    }
}

/* Small tablets / large phones (480px - 768px) */
@media (min-width: 481px) and (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2.5rem;
    }

    .preview-items {
        flex-direction: column;
        gap: 1rem;
    }

    .benefits {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .hero-text h2 {
        font-size: 2rem;
    }

    .hero-text p {
        font-size: 1.05rem;
    }

    .btn-primary, .btn-secondary {
        padding: 0.7rem 1.8rem;
        font-size: 1rem;
    }

    .cta h2 {
        font-size: 1.8rem;
    }

    .cta p {
        font-size: 1.05rem;
    }

    .cta-features {
        flex-direction: column;
        gap: 1rem;
    }
}