/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Navbar styles */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.logo h1 {
    color: #2563eb;
    font-size: 1.8rem;
}

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

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

.nav-links a:hover {
    color: #2563eb;
}

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

.login-btn, .signup-btn {
    padding: 0.5rem 1.5rem;
    border-radius: 5px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.login-btn {
    background: none;
    border: 1px solid #2563eb;
    color: #2563eb;
}

.signup-btn {
    background: #2563eb;
    border: none;
    color: white;
}

.login-btn:hover {
    background: #f0f7ff;
}

.signup-btn:hover {
    background: #1d4ed8;
}

/* Hero section */
.hero {
    padding: 8rem 5% 4rem;
    background: linear-gradient(135deg, #f0f7ff 0%, #e6f0ff 100%);
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-content {
    text-align: center;
    max-width: 800px;
}

.hero h1 {
    font-size: 3rem;
    color: #1e3a8a;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    color: #4b5563;
    margin-bottom: 2rem;
}

/* Upload area */
.upload-container {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.upload-area {
    border: 2px dashed #2563eb;
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-area:hover {
    background: #f8fafc;
}

.upload-area i {
    font-size: 3rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

.upload-options {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.upload-btn {
    padding: 0.75rem 1.5rem;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.upload-btn:hover {
    background: #e2e8f0;
}

/* Features section */
.features {
    padding: 4rem 5%;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    background: white;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    border-radius: 10px;
    background: #f8fafc;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 2.5rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

/* Conversion tools section */
.conversion-tools {
    padding: 4rem 5%;
    background: #f8fafc;
}

.conversion-tools h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: #1e3a8a;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.tool-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.tool-card i {
    font-size: 2rem;
    color: #2563eb;
    margin-bottom: 1rem;
}

/* Footer */
footer {
    background: #1e3a8a;
    color: white;
    padding: 4rem 5% 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section a {
    display: block;
    color: #e2e8f0;
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    text-align: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
}

/* Responsive design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .upload-options {
        flex-direction: column;
    }
    
    .upload-btn {
        width: 100%;
    }
}