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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color: #333;
    line-height: 1.6;
}

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

/* Header */
.header {
    background-color: #ffffff;
    border-bottom: 1px solid #e0e0e0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1976d2;
}

.login-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    color: #757575;
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.login-btn:hover {
    color: #1976d2;
    background-color: #f5f5f5;
}

.login-icon {
    width: 18px;
    height: 18px;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f5f7fa 0%, #e8eef5 100%);
    padding: 80px 0;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #666;
    line-height: 1.8;
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: #ffffff;
}

.section-title {
    text-align: center;
    font-size: 2.125rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 30px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    text-align: center;
    transition: all 0.3s ease;
    background-color: #ffffff;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    margin-bottom: 20px;
    color: #1976d2;
    display: inline-block;
}

.feature-icon svg {
    width: 48px;
    height: 48px;
}

.feature-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 12px;
}

.feature-description {
    font-size: 1rem;
    color: #666;
    line-height: 1.6;
}

/* Contact Section */
.contact {
    padding: 60px 0;
    background-color: #f9fafb;
}

.contact-grid {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.contact-icon {
    color: #1976d2;
    flex-shrink: 0;
}

.contact-link {
    color: #1976d2;
    text-decoration: none;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.contact-link:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background-color: #f5f5f5;
    padding: 24px 0;
    text-align: center;
}

.footer-text {
    color: #999;
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero {
        padding: 60px 0;
    }

    .hero-title {
        font-size: 2rem;
    }

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

    .features {
        padding: 60px 0;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 40px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-card {
        padding: 20px;
    }

    .feature-icon svg {
        width: 40px;
        height: 40px;
    }

    .feature-title {
        font-size: 1rem;
    }

    .feature-description {
        font-size: 0.875rem;
    }

    .contact {
        padding: 40px 0;
    }

    .contact-grid {
        flex-direction: column;
        gap: 30px;
        align-items: center;
    }

    .contact-link {
        font-size: 0.875rem;
    }

    .login-btn {
        font-size: 0.75rem;
        padding: 6px 12px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 0.875rem;
    }

    .logo {
        font-size: 1rem;
    }
}

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