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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: #f5f5f5;
    padding-top: 80px;
}

.navbar {
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 20px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 18px;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.app-name {
    font-size: 24px;
    font-weight: 600;
    color: #2d3748;
    letter-spacing: -0.5px;
}

.auth-buttons {
    display: flex;
    gap: 12px;
    align-items: center;
}

.btn {
    padding: 10px 20px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn-login {
    background-color: transparent;
    color: #4a5568;
    border: 1px solid #e2e8f0;
}

.btn-login:hover {
    background-color: #f7fafc;
    border-color: #cbd5e0;
}

.btn-signup {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-signup:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        padding: 0 15px;
        height: 60px;
    }
    
    .logo {
        width: 35px;
        height: 35px;
        font-size: 16px;
    }
    
    .app-name {
        font-size: 20px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 13px;
    }
    
    .auth-buttons {
        gap: 8px;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 0 10px;
    }
    
    .logo-container {
        gap: 8px;
    }
    
    .app-name {
        font-size: 18px;
    }
    
    .btn {
        padding: 7px 12px;
        font-size: 12px;
    }
}